@inproceedings{Evesq02a, address = {Santa Cruz de Tenerife, Spain}, series = {10th {Energy} {Programme} {Marie} {Curie} {Research} {Fellowship} {Conference}}, title = {Improved {Low}-{Order} {Model} of {Combustion} {Instabilities} in {Annular} {Combustors}}, booktitle = {10th {Energy} {Programme} {Marie} {Curie} {Research} {Fellowship} {Conference}}, publisher = {ITER}, author = {Evesque, S.}, year = {2002}, pages = {11--11}, annote = {The following values have no corresponding Zotero field:CY - Santa Cruz de Tenerife, Spain}, file = {Evesque_2002_Improved low-order model of combustion instabilities in annular combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\V7MTKI7S\\Evesque_2002_Improved low-order model of combustion instabilities in annular combustors.pdf:application/pdf}, } @article{MensaMagri18b, title = {Exceptional points in the thermoacoustic spectrum}, volume = {433}, issn = {0022-460X}, doi = {10.1016/j.jsv.2018.06.069}, language = {en}, journal = {Journal of Sound and Vibration}, author = {Mensah, Georg A. and Magri, Luca and Silva, Camilo F. and Buschmann, Philip E. and Moeck, Jonas P.}, month = oct, year = {2018}, keywords = {Defective eigenvalue, Eigenvalue sensitivity, Intrinsic thermoacoustic feedback, MediaTUM*, published, Thermoacoustics}, pages = {124--128}, file = {Mensah et al_2018_Exceptional points in the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H4EZCTFX\\Mensah et al_2018_Exceptional points in the.pdf:application/pdf;ScienceDirect Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\HW6L7YNN\\S0022460X18304383.html:text/html}, } @article{Polif20, title = {Modeling and analysis of premixed flame dynamics by means of distributed time delays}, volume = {79}, issn = {03601285}, doi = {10.1016/j.pecs.2020.100845}, journal = {Progress in Energy and Combustion Science}, author = {Polifke, Wolfgang}, year = {2020}, keywords = {archived, MediaTUM}, pages = {100845}, file = {Polifke_2020_Modeling and Analysis of Premixed Flame.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B53KL8TK\\Polifke_2020_Modeling and Analysis of Premixed Flame.pdf:application/pdf}, } @article{SchaeGuo20a, title = {The {Impact} of {Exceptional} {Points} on the {Reliability} of {Thermoacoustic} {Stability} {Analysis}}, volume = {143}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4049351}, language = {en}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Schaefer, Felicitas and Guo, Shuai and Polifke, Wolfgang}, month = feb, year = {2021}, note = {youtu.be/SR1E0aKYpNk tex.ids: SchaeGuo00}, keywords = {published, archived, MediaTUM}, pages = {021010}, file = {Schaefer et al_2021_The Impact of Exceptional Points on the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PCRZMESI\\Schaefer et al_2021_The Impact of Exceptional Points on the.pdf:application/pdf}, } @article{FournSchae22a, title = {Interplay of {Clusters} of {Acoustic} and {Intrinsic} {Thermoacoustic} {Modes} in {Can}-{Annular} {Combustors}}, volume = {144}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4055381}, language = {en}, number = {12}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Fournier, Guillaume J. J. and Schaefer, Felicitas and Haeringer, Matthias and Silva, Camilo F. and Polifke, Wolfgang}, month = dec, year = {2022}, keywords = {published, archived}, pages = {121015}, file = {Fournier et al_2022_Interplay of Clusters of Acoustic and Intrinsic Thermoacoustic Modes in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3RKPSIQS\\Fournier et al_2022_Interplay of Clusters of Acoustic and Intrinsic Thermoacoustic Modes in.pdf:application/pdf}, } @phdthesis{Fourn24, address = {Munich, Germany}, type = {Ph.{D}. {Thesis}}, title = {Clusters of {Thermoacoustic} {Modes} in {Annular} and {Can}-{Annular} {Combustors}}, school = {TU München}, author = {Fournier, Guillaume J. J.}, year = {2024}, file = {Fournier - 2024 - Clusters of Thermoacoustic Modes in Annular and Ca.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3DPFG697\\Fournier - 2024 - Clusters of Thermoacoustic Modes in Annular and Ca.pdf:application/pdf}, } @phdthesis{engelhardt_adjoint-based_2023, address = {Munich, Germany}, type = {Ph.{D}. {Thesis}}, title = {Adjoint-{Based} {Analysis} of {Low}-{Order} {Thermoacoustic} {Networks}}, school = {TU München}, author = {Engelhardt, Felicitas}, year = {2023}, file = {Engelhardt - 2023 - Adjoint-Based Analysis of Low-Order Thermoacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\A2SFQ2BU\\Engelhardt - 2023 - Adjoint-Based Analysis of Low-Order Thermoacoustic.pdf:application/pdf}, } @mastersthesis{niebler_evaluating_2023, title = {Evaluating the {Capability} of {PINNs} for {Inverse} {Problems} in {Thermoacoustics}}, school = {TU München}, author = {Niebler, Korbinian}, month = mar, year = {2023}, note = {Betreuer: Silva/Bonnaire}, file = {Niebler - 2023 - Evaluating the Capability of PINNs for Inverse Pro.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S5C9QZD5\\Niebler - 2023 - Evaluating the Capability of PINNs for Inverse Pro.pdf:application/pdf}, } @inproceedings{Polif15, address = {Udine, Italy}, title = {Six {Lectures} on {Thermoacoustic} {Combustion} {Instability}}, doi = {10.5281/zenodo.7932641}, abstract = {6 lectures on: Linear Analysis; Frequency domain/time domain linear analysis; n-tau model and its deficiencies; Transfer functions \& its measurement, SISO and MIMO model structures; Transfer matrix; thermoacoustic network analysis; Calculation of growth rates, Nyquist Plots; State space models}, booktitle = {21st {CISM}-{IUTAM} {Int}'l {Summer} {School} on {Measurement}, analysis and passive control of thermoacoustic oscillations}, author = {Polifke, Wolfgang}, year = {2015}, file = {Polif15_0-Phasors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G9EXKRMU\\Polif15_0-Phasors.pdf:application/pdf;Polif15_1-Intro-2-Physics.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W6W3AQKM\\courses_C1504_polifke_1-Intro-2-Physics.pdf:application/pdf;Polif15_3-StabilityAnalysis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K62VK6I8\\courses_C1504_polifke_3-StabilityAnalysis.pdf:application/pdf;Polif15_4-SystemModels.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K9KUTQIU\\courses_C1504_polifke_4-SystemModels.pdf:application/pdf;Polif15_5-NetworkModels.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CIKGV8AU\\courses_C1504_polifke_5-NetworkModels.pdf:application/pdf;Polif15_6-TimeLags.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DWK4MM9K\\courses_C1504_polifke_6-TimeLags.pdf:application/pdf;Polifke - 2015 - Six Lectures on Thermoacoustic Combustion Instabil.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VCHAIZGG\\Polifke - 2015 - Six Lectures on Thermoacoustic Combustion Instabil.pdf:application/pdf}, } @mastersthesis{Echev23, title = {Solving an inverse heat transfer problem using the {Bayesian} approach and {Physics}-{Informed} neural networks}, school = {TU München}, author = {Echeverria, Veronica}, year = {2023}, note = {Betreuer. Silva}, file = {Echeverria_2023.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ATNE2F5K\\Echeverria_2023.pdf:application/pdf}, } @article{DoanPolif21a, title = {Short- and long-term prediction of chaotic flows: {A} physics-constrained reservoir computing approach}, volume = {477}, doi = {10.1098/rspa.2021.0135}, journal = {Proceedings of the Royal Society of London A}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, year = {2021}, note = {arXiv preprint arXiv:1912.10994}, keywords = {MediaTUM}, pages = {20210135}, annote = { The following link provides free access to your paper. You may send this link to colleagues that may be interested. If your paper is not published under an open access model, this free access link may NOT be used for commercial purposes or posted on openly accessible websites.To activate your access, please click on the following link:https://www.royalsocietypublishing.org/eprint/ZFSNX2SYSXYKVDWGHG9H/full }, file = {arXiv - Doan et al_2019_A physics-aware machine to predict.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VB94QNL9\\Doan et al_2019_A physics-aware machine to predict.pdf:application/pdf;Doan et al. - 2021 - Short- and long-term prediction of chaotic flows .pdf:C\:\\Users\\niebl\\Zotero\\storage\\JESUAPY7\\Doan et al. - 2021 - Short- and long-term prediction of chaotic flows .pdf:application/pdf}, } @article{DoanPolif20b, title = {Physics-{Informed} {Echo} {State} {Networks}}, volume = {47}, doi = {10.1016/j.jocs.2020.101237}, abstract = {We extend the Physics-Informed Echo State Network (PI-ESN) framework to reconstruct the evolution of an unmeasured state (hidden state) in a chaotic system. The PI-ESN is trained by using (i) data, which contains no information on the unmeasured state, and (ii) the physical equations of a prototypical chaotic dynamical system.vNon-noisy and noisy datasets are considered. First, it is shown that the PI-ESN can accurately reconstruct the unmeasured state. Second, the reconstruction is shown to be robust with respect to noisy data, which means that the PI-ESN acts as a denoiser. This paper opens up new possibilities for leveraging the synergy between physical knowledge and machine learning to enhance the reconstruction and prediction of unmeasured states in chaotic dynamical systems.}, journal = {Journal of Computational Science}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, year = {2020}, keywords = {MediaTUM, Archived}, pages = {101237}, file = {Doan et al. - 2020 - Physics-Informed Echo State Networks.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G7XV26KS\\Doan et al. - 2020 - Physics-Informed Echo State Networks.pdf:application/pdf}, } @article{DoanPolif20, title = {Learning {Hidden} {States} in a {Chaotic} {System}: {A} {Physics}-{Informed} {Echo} {State} {Network} {Approach}}, volume = {12142}, doi = {10.1007/978-3-030-50433-5_9}, abstract = {We extend the Physics-Informed Echo State Network (PI-ESN) framework to reconstruct the evolution of an unmeasured state (hidden state) in a chaotic system. The PI-ESN is trained by using (i) data, which contains no information on the unmeasured state, and (ii) the physical equations of a prototypical chaotic dynamical system.vNon-noisy and noisy datasets are considered. First, it is shown that the PI-ESN can accurately reconstruct the unmeasured state. Second, the reconstruction is shown to be robust with respect to noisy data, which means that the PI-ESN acts as a denoiser. This paper opens up new possibilities for leveraging the synergy between physical knowledge and machine learning to enhance the reconstruction and prediction of unmeasured states in chaotic dynamical systems.}, journal = {Lecture Notes in Computer Science - ICCS2020}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, year = {2020}, keywords = {MediaTUM, Archived}, pages = {117--123}, file = {Learning_Hidden_States_in_a_Chaotic_System_A_Physics-Informed_Echo_State_Network_Approach_SUBMITTED.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RH2RMKUM\\Learning_Hidden_States_in_a_Chaotic_System_A_Physics-Informed_Echo_State_Network_Approach_SUBMITTED.pdf:application/pdf}, } @inproceedings{DoanPolif19a, address = {Cambridge, MA}, title = {Physics-informed echo state networks for the prediction of extreme events in turbulent shear flows}, volume = {64}, url = {https://meetings.aps.org/Meeting/DFD19/Session/L17.2}, booktitle = {Bulletin of the {American} {Physical} {Society}}, publisher = {APS}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, year = {2019}, keywords = {MediaTUM}, file = {Doan et al_2019_Physics-informed echo state networks.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DYQ8MDR6\\Doan et al_2019_Physics-informed echo state networks.pdf:application/pdf}, } @misc{Brunt21, title = {Applying machine learning to study fluid mechanics}, author = {Brunton, Steven L.}, year = {2021}, note = {arXiv: 2110.02083 [physics.flu-dyn]}, file = {Brunton_2021_Applying machine learning to study.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W4YZAF8V\\Brunton_2021_Applying machine learning to study.pdf:application/pdf}, } @article{BrajaCarra20, title = {Combining data assimilation and machine learning to emulate a dynamical model from sparse and noisy observations: {A} case study with the {Lorenz} 96 model}, volume = {44}, issn = {18777503}, shorttitle = {Combining data assimilation and machine learning to emulate a dynamical model from sparse and noisy observations}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1877750320304725}, doi = {10.1016/j.jocs.2020.101171}, language = {en}, urldate = {2022-08-07}, journal = {Journal of Computational Science}, author = {Brajard, Julien and Carrassi, Alberto and Bocquet, Marc and Bertino, Laurent}, month = jul, year = {2020}, pages = {101171}, file = {Brajard et al_2020_Combining data assimilation and machine.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QHZQB8YU\\Brajard et al_2020_Combining data assimilation and machine.pdf:application/pdf}, } @article{BoureGyrya22, title = {Dynamic {Calibration} of {Differential} {Equations} using {Machine} {Learning}, with {Application} to {Turbulence} {Models}}, issn = {00219991}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0021999121008196}, doi = {10.1016/j.jcp.2021.110924}, language = {en}, urldate = {2022-01-24}, journal = {Journal of Computational Physics}, author = {Boureima, I. and Gyrya, V. and Saenz, J.A. and Kurien, S. and Francois, M.}, month = jan, year = {2022}, pages = {110924}, file = {Boureima et al. - 2022 - Dynamic Calibration of Differential Equations usin.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R7FP6GNT\\Boureima et al. - 2022 - Dynamic Calibration of Differential Equations usin.pdf:application/pdf}, } @article{BodeGaudi21, title = {Using physics-informed enhanced super-resolution generative adversarial networks for subfilter modeling in turbulent reactive flows}, issn = {15407489}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1540748920300481}, doi = {10.1016/j.proci.2020.06.022}, language = {en}, urldate = {2021-03-03}, journal = {Proceedings of the Combustion Institute}, author = {Bode, Mathis and Gauding, Michael and Lian, Zeyu and Denker, Dominik and Davidovic, Marco and Kleinheinz, Konstantin and Jitsev, Jenia and Pitsch, Heinz}, month = jan, year = {2021}, pages = {S1540748920300481}, file = {Bode et al_2021_Using physics-informed enhanced.pdf:C\:\\Users\\niebl\\Zotero\\storage\\52EQAXNY\\Bode et al_2021_Using physics-informed enhanced.pdf:application/pdf}, } @inproceedings{BalasRouwe21, address = {Online}, title = {Parametric estimation of dynamical system data using autoregressive modeling}, abstract = {Thermoacoustic instabilities have plagued the operation of lean premixed gas turbine engines for decades and significant research is being conducted in detecting and understanding them. In this paper, an output only identification technique is employed for a noise induced dynam-ical system representing combustion instability behavior. A system of independent harmonic oscillators, excited by random white noise input is used to generate surrogate data representing pressure oscillations in a combustor prior to an instability. An autoregressive (AR) model is then used to represent the generated time series data by a set of coefficients. AR coefficients are estimated by extracting the auto-correlation of the time series, which is referred as Yule-Walker estimation method. Using the set of coefficients, the eigenfrequencies, damping coef-ficients and the power spectral density (PSD) can be calculated directly. The estimated quanti-ties concurred with the input with a good degree of accuracy with a concise set of coeffi-cients. The same harmonic model was excited by colored noise and the algorithm estimates the spectrum reliably. It is particularly promising considering real combustor data is likely to be excited by non-white noise. Further development could enable the use of AR models as an output only system identification technique to provide an early warning indicator in industrial gas turbines by tracking the rate of damping of dominant eigenmodes. Furthermore, the iden-tification method is a viable edge-computing strategy that characterizes the system dynamics using a small set of coefficients, which can be beneficial for long term diagnosis, fleet moni-toring and condition-based maintenance purposes}, author = {Balasubramanian, Nikhil and Rouwenhorst, Driek and Hermann, Jakob}, month = jul, year = {2021}, keywords = {MediaTUM}, file = {Balasubramanian et al. - 2021 - Parametric estimation of dynamical system data usi.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GNP6YISS\\Balasubramanian et al. - 2021 - Parametric estimation of dynamical system data usi.pdf:application/pdf}, } @inproceedings{balasubramanian_estimation_2022, address = {Rotterdam Ahoy Convention Centre, Rotterdam, The Netherlands}, title = {Estimation of dynamical thermoacoustic modes using an output only {Observer} {Kalman} filter based identification ({O3KID}) algorithm}, abstract = {Thermoacoustic instabilities have plagued the operation of gas turbine engines for years and significant research is being conducted in detecting and understanding them. In this paper, an output only identification technique is employed for a noise induced dynamical system representing combustion dynamics. Background turbulent flow in a combustor has a significant influence on combustion dynamics. In general, this flow noise is referred to as background noise, whose characteristics are unknown apriori. Identification of combustion dynamics with output only identification becomes challenging since the system dynamics and background noise dynamics are indistinguishable. To simplify the problem and identify both deterministic and stochastic components, a two-step identification using state space modelling is implemented. The data is transformed to accommodate an observer, which predicts the current state of a system from its previous states. The observer takes the form of a Kalman filter and in solving for the Kalman filter gain would solve the original problem yielding all the system matrices of the state space model. This approach is called the Output only Observer Kalman filter identification (O3KID) and its first step solves for least squares from a set of algebraic equations constructed from just the measured output. The least squares solution gives the Markov parameters (impulse response) and the output residuals. The subsequent step takes the Markov parameters or the residuals to solve for the system matrices using any deterministic sub-space identification method. In this paper, classical methods such as the Eigenvalue Realization Algorithm (ERA) using the Markov parameters is employed to solve for the system matrices. In using this direct non-iterative two-step algorithm, it is possible to estimate the eigenmodes and damping coefficients from output measured data. To validate the algorithm, a system of independent harmonic oscillators, excited by random noise is used to generate surrogate data representing pressure oscillations in a combustor prior to an instability. The O3KID algorithm could identify the eigenmodes with exactly the degrees of freedom required to define it i.e., a system with three harmonic oscillators could be defined with a 6-order model, which implies 6 coefficients. The same method was applied to pressure fluctuations data from a laboratory burner. The estimation of the most energetic modes was accurate with as few as 10 modes. This fast direct approach could be used to provide an early warning indicator in industrial gas turbines by tracking the rate of damping of dominant eigenmodes. Additionally, saving the state space parameters periodically can serve as a data-lean option to track changes of the dynamics and across a gas turbine fleet}, author = {Balasubramanian, Nikhil and Rouwenhorst, Driek and Hermann, Jakob}, year = {2022}, pages = {7}, file = {Balasubramanian et al. - 2022 - ESTIMATION OF DYNAMICAL THERMOACOUSTIC MODES USING.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6YYCVAR5\\Balasubramanian et al. - 2022 - ESTIMATION OF DYNAMICAL THERMOACOUSTIC MODES USING.pdf:application/pdf}, } @inproceedings{Polif16, address = {Skytteholm, Ekerö, Sweden}, title = {Distributed delay and state space models in acoustics and combustion dynamics}, url = {https://www.researchgate.net/publication/292392227_Distributed_delay_and_state_space_models_in_acoustics_and_combustion_dynamics?ev=prf_pub}, booktitle = {Annual {Meeting} of the {Linné} {FLOW} {Centre}}, publisher = {Linné FLOW Centre}, author = {Polifke, W.}, month = jan, year = {2016}, } @inproceedings{surendran_adapting_2022, address = {Glasgow, UK}, title = {Adapting a slit model to determine the aeroacoustic response of tube rows}, language = {en}, booktitle = {Internoise 2022}, author = {Surendran, Aswathy and Na, Wei and Boakes, Charles and Yang, Dong and Morgans, Aimee S and Boij, Susann}, year = {2022}, pages = {10}, file = {Surendran et al. - Adapting a slit model to determine the aeroacousti.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CSBDDVQG\\Surendran et al. - Adapting a slit model to determine the aeroacousti.pdf:application/pdf}, } @inproceedings{MerkBusch22, address = {Rotterdam, NL}, series = {{GT2022}-79653}, title = {The nonlinear thermoacoustic eigenvalue problem and its rational approximations: assessment of solution strategies}, doi = {10.1115/GT2022-79653}, booktitle = {{ASME} {Turbo} {Expo} 2022 {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Merk, Moritz and Buschmann, Philip E. and Moeck, Jonas P and Polifke, Wolfgang}, year = {2022}, keywords = {archived, MediaTUM}, file = {GT2022-79653.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YE6SDSQB\\GT2022-79653.pdf:application/pdf}, } @inproceedings{DesorEder23, address = {Zurich, Switzerland}, title = {Influence of wall-to-wall radiative heat transfer on premixed flame dynamics}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}}, author = {Désor, Marcel and Eder, Alexander J. and Silva, Camilo F. and Polifke, Wolfgang}, year = {2023}, keywords = {published, archived, MediaTUM}, file = {Désor et al. - 2023 - Influence of wall-to-wall radiative heat transfer .pdf:C\:\\Users\\niebl\\Zotero\\storage\\WR9L7CA3\\Désor et al. - 2023 - Influence of wall-to-wall radiative heat transfer .pdf:application/pdf}, } @mastersthesis{Novel21, title = {Characteristic-based boundary conditions for compressible {CFD}}, school = {TU München}, author = {Novello, Nicolò}, month = nov, year = {2021}, note = {Betreuer: Haeringer}, file = {Novello Nicolò - 2021 - Characteristic-based boundary conditions for compr.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2VQZCYVH\\Novello Nicolò - 2021 - Characteristic-based boundary conditions for compr.pdf:application/pdf}, } @mastersthesis{Panet18, address = {Garching, Germany}, title = {Application and modeling of {FTM}/{FTF} of kerosene spray flames in low order network models}, language = {English}, school = {TU München}, author = {Panetta, Lucien}, year = {2018}, note = {Betreuer: Meindl}, file = {Panetta - 2018 - Application and modeling of FTMFTF of kerosene sp.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ACC9JM27\\Panetta - 2018 - Application and modeling of FTMFTF of kerosene sp.pdf:application/pdf}, } @inproceedings{MerkGaudr18a, address = {Lillestrom, Norway}, series = {{GT2018}-75529}, title = {Direct assessment of the acoustic scattering matrix of a turbulent swirl combustor by combining system identification, large eddy simulation and analytical approaches}, doi = {10.1115/GT2018-75529}, booktitle = {{ASME} {Turbo} {Expo} 2018: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Merk, M. and Gaudron, R. and Silva, C. and Gatti, M. and Mirat, C. and Polifke, W. and Schuller, T.}, year = {2018}, keywords = {MediaTUM*}, file = {Merk et al_2018_Direct assessment of the acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AEAB58LN\\Merk et al_2018_Direct assessment of the acoustic.pdf:application/pdf}, } @article{Tay-WBombe12, title = {Comparative {Validation} {Study} on {Identification} of {Premixed} {Flame} {Transfer} {Function}}, volume = {134}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4004183}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Tay-Wo-Chong, Luis and Bomberg, Sebastian and Ulhaq, Ahtsham and Komarek, Thomas and Polifke, Wolfgang}, month = feb, year = {2012}, pages = {021502}, file = {Tay-Wo-Chong et al_2012_Comparative Validation Study on Identification of Premixed Flame Transfer.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZUU95PQD\\Tay-Wo-Chong et al_2012_Comparative Validation Study on Identification of Premixed Flame Transfer.pdf:application/pdf}, } @phdthesis{Garci23, type = {Semester {Thesis}}, title = {Iterative strategy to solve large linear systems for stability analyses on gas turbines}, language = {English}, school = {TUM}, author = {Garcia Guzman, Nicolas Mateo}, month = apr, year = {2023}, note = {Betreuer: Grégoire Varillon, Wolfgang Polifke}, file = {Appendix.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QJKU7F6R\\Appendix.pdf:application/pdf;Semesterarbeit - Nicolas Mateo Garcia Guzman.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G2R83IHB\\Semesterarbeit - Nicolas Mateo Garcia Guzman.pdf:application/pdf}, } @phdthesis{Prabh23, type = {Research internship}, title = {Implementing a {Joule} {Heating} model in {PowerTHERM} for electric vehicle applications}, school = {TUM}, author = {Prabhashana, Dinuka}, month = apr, year = {2023}, note = {Betreuer: Grégoire Varillon, Wolfgang Polifke}, file = {Prabhashana - 2023 - Implementing a Joule Heating model in PowerTHERM f.pdf:C\:\\Users\\niebl\\Zotero\\storage\\73J52XTU\\Prabhashana - 2023 - Implementing a Joule Heating model in PowerTHERM f.pdf:application/pdf}, } @article{MorimFukam21, title = {Convolutional neural networks for fluid flow analysis: toward effective metamodeling and low-dimensionalization}, volume = {35}, issn = {0935-4964, 1432-2250}, shorttitle = {Convolutional neural networks for fluid flow analysis}, url = {http://arxiv.org/abs/2101.02535}, doi = {10.1007/s00162-021-00580-0}, abstract = {We focus on a convolutional neural network (CNN), which has recently been utilized for fluid flow analyses, from the perspective on the influence of various operations inside it by considering some canonical regression problems with fluid flow data. We consider two types of CNN-based fluid flow analyses; 1. CNN metamodeling and 2. CNN autoencoder. For the first type of CNN with additional scalar inputs, which is one of the common forms of CNN for fluid flow analysis, we investigate the influence of input placements in the CNN training pipeline. As an example, estimation of force coefficients of an inclined flat plate and two side-by-side cylinders in laminar flows is considered. We find that care should be taken for the placement of additional scalar inputs depending on the problem setting and the complexity of flows that users handle. We then discuss the influence of various parameters and operations on the CNN performance, with the utilization of autoencoder (AE). A two-dimensional turbulence is considered for the demonstration of AE. The results of AE highly rely on the decaying nature. Investigation on the influence of padding operation at a convolutional layer is also performed. The zero padding shows reasonable ability compared to other methods which account for the boundary conditions assumed in the numerical data. Moreover, the effect of the dimensional reduction/extension methods inside CNN is also examined. The CNN model is robust against the difference in dimension reduction operations, while it is sensitive to the dimensional extension methods. The findings of this paper will help us better design a CNN architecture for practical fluid flow analysis}, number = {5}, urldate = {2022-02-01}, journal = {Theoretical and Computational Fluid Dynamics}, author = {Morimoto, Masaki and Fukami, Kai and Zhang, Kai and Nair, Aditya G. and Fukagata, Koji}, month = oct, year = {2021}, note = {tex.ids= MorimFukam21a arXiv: 2101.02535}, keywords = {Physics - Computational Physics, fluid dynamics}, pages = {633--658}, annote = {Comment: 24 pages, 20 figures}, file = {arXiv Fulltext PDF:C\:\\Users\\niebl\\Zotero\\storage\\Y5FJTB7F\\Morimoto et al. - 2021 - Convolutional neural networks for fluid flow analy.pdf:application/pdf;arXiv.org Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\THSE8ST5\\2101.html:text/html;Full Text:C\:\\Users\\niebl\\Zotero\\storage\\BHB6833D\\Morimoto et al. - 2021 - Convolutional neural networks for fluid flow analy.pdf:application/pdf}, } @article{FukamFukag20, title = {Assessment of supervised machine learning methods for fluid flows}, volume = {34}, issn = {0935-4964, 1432-2250}, url = {http://link.springer.com/10.1007/s00162-020-00518-y}, doi = {10.1007/s00162-020-00518-y}, language = {en}, number = {4}, urldate = {2022-01-26}, journal = {Theoretical and Computational Fluid Dynamics}, author = {Fukami, Kai and Fukagata, Koji and Taira, Kunihiko}, month = aug, year = {2020}, pages = {497--519}, file = {Full Text:C\:\\Users\\niebl\\Zotero\\storage\\LTBPWZ7K\\Fukami et al. - 2020 - Assessment of supervised machine learning methods .pdf:application/pdf;Submitted Version:C\:\\Users\\niebl\\Zotero\\storage\\58CJSDEG\\Fukami et al. - 2020 - Assessment of supervised machine learning methods .pdf:application/pdf}, } @article{FuXiao21, title = {A data driven reduced order model of fluid flow by {Auto}-{Encoder} and self-attention deep learning methods}, url = {http://arxiv.org/abs/2109.02126}, abstract = {This paper presents a new data-driven non-intrusive reduced-order model(NIROM) that outperforms the traditional Proper orthogonal decomposition (POD) based reducedorder model. This is achieved by using Auto-Encoder(AE) and attention-based deep learning methods. The novelty of the present work lies in that it uses Stacked AutoEncoder(SAE) network to project original high-dimensional dynamical systems onto a low dimensional nonlinear subspace and predict the fluid dynamics using an attentionbased deep learning method. A new model reduction neural network architecture for fluid flow problem is presented. The SAE network compresses high-dimensional physical information into several much smaller sized representations in a latent space. These representations are expressed by a number of codes in the middle layer of SAE neural network. Then, those codes at different time levels are trained to construct a set of hyper-surfaces with multi variable response functions using attention-based deep learning methods. The inputs of the attention-based network are previous time levels' codes and the outputs of the network are current time levels' codes. The codes at current time level are then projected back to the original full space by the decoder layers in the SAE network. The capability of this data-driven reduced order model (DDROM) is illustrated numerically by two test cases: flow past a cylinder, and a lock exchange, respectively. The results obtained show that the DDROM performs better in terms of accuracy than the popular model reduction method namely proper orthogonal decomposition. The improvement is assessed by comparison with a high fidelity POD model.}, urldate = {2022-01-28}, journal = {arXiv:2109.02126 [physics]}, author = {Fu, R. and Xiao, D. and Navon, I. M. and Wang, C.}, month = sep, year = {2021}, note = {arXiv: 2109.02126}, keywords = {Physics - Computational Physics}, file = {arXiv Fulltext PDF:C\:\\Users\\niebl\\Zotero\\storage\\WQ3WYK5J\\Fu et al. - 2021 - A data driven reduced order model of fluid flow by.pdf:application/pdf;arXiv.org Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\DB4AB5CH\\2109.html:text/html}, } @article{KuhlmMarra22, title = {{LES} based prediction of technically premixed flame dynamics and comparison with perfectly premixed mode}, volume = {34}, url = {https://doi.org/10.1063/5.0098962}, doi = {10.1063/5.0098962}, language = {en}, number = {8}, journal = {Physics of Fluids}, author = {Kuhlmann, Johannes and Marragou, S. and Boxx, Isaac and Schuller, Thierry and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {085125}, file = {Kuhlmann et al. - 2022 - LES based prediction of technically premixed flame.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PL76MPUV\\Kuhlmann et al. - 2022 - LES based prediction of technically premixed flame.pdf:application/pdf}, } @article{KuhlmLampm22, title = {Assessing accuracy, reliability and efficieny of combustion models for prediction of flame dynamics with large eddy simulation}, volume = {34}, doi = {10.1063/5.0098975}, language = {en}, number = {9}, journal = {Physics of Fluids}, author = {Kuhlmann, Johannes and Lampmann, Arne and Pfitzner, Michael and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {095117}, file = {Kuhlmann et al_2022_Assessing accuracy, reliability and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YM287FFF\\Kuhlmann et al_2022_Assessing accuracy, reliability and.pdf:application/pdf}, } @inproceedings{McCarIndle20, address = {Virtual}, series = {{GT2020}-14834}, title = {Online {Detection} of {Combustion} {Instabilities} {Using} {Supervised} {Machine} {Learning}}, url = {https://asmedigitalcollection.asme.org/GT/proceedings-abstract/GT2020/V04AT04A045/1094725}, doi = {10.1115/GT2020-14834}, booktitle = {{ASME} {Turbo} {Expo} 2020: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, publisher = {ASME}, author = {McCartney, Michael and Indlekofer, Thomas and Polifke, Wolfgang}, year = {2020}, keywords = {MediaTUM}, file = {GT2020-14834_R2.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SBFZ2RQX\\GT2020-14834_R2.pdf:application/pdf}, } @article{EmmerMeind16, title = {Linear {State} {Space} {Interconnect} {Modeling} of {Acoustic} {Systems}}, volume = {102}, issn = {16101928}, doi = {10.3813/AAA.918997}, language = {en}, number = {5}, journal = {Acta Acustica united with Acustica}, author = {Emmert, Thomas and Meindl, Max and Jaensch, Stefan and Polifke, Wolfgang}, month = sep, year = {2016}, keywords = {published, PerRev}, pages = {824--833}, file = {Emmert et al_2016_Linear State Space Interconnect Modeling of Acoustic Systems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7NV3ETNC\\Emmert et al_2016_Linear State Space Interconnect Modeling of Acoustic Systems.pdf:application/pdf}, } @article{HaeriFourn20a, title = {A {Strategy} to {Tune} {Acoustic} {Terminations} of {Single}-{Can} {Test}-{Rigs} to {Mimic} {Thermoacoustic} {Behavior} of a {Full} {Engine}}, volume = {143}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4048642}, language = {en}, number = {7}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Haeringer, Matthias and Fournier, Guillaume J. J. and Meindl, Maximilian and Polifke, Wolfgang}, month = jul, year = {2021}, keywords = {MediaTUM}, pages = {710029}, file = {Haeringer et al. - 2021 - A Strategy to Tune Acoustic Terminations of Single.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ADJ8G8RZ\\Haeringer et al. - 2021 - A Strategy to Tune Acoustic Terminations of Single.pdf:application/pdf}, } @techreport{kuhlmann_dfg_2022, title = {{DFG} {Final} {Report}: {Modeling} and {Identification} of {Technically} {Premix} {Flame} {Dynamics}}, language = {en}, author = {Kuhlmann, Johannes and Lampmann, Arne and Pfitzner, Michael and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, file = {Kuhlmann et al. - 2022 - DFG Final Report Modeling and Identification of T.pdf:C\:\\Users\\niebl\\Zotero\\storage\\N9YAZYZQ\\Kuhlmann et al. - 2022 - DFG Final Report Modeling and Identification of T.pdf:application/pdf}, } @inproceedings{Tay-WKomar09, address = {Vienna, Austria}, title = {Influence of strain and heat loss on flame stabilization in a non-adiabatic combustor}, url = {https://www.tib.eu/de/suchen/id/tema%3ATEMA20100503549}, booktitle = {4th {European} {Combustion} {Meeting}}, publisher = {The Combustion Institute}, author = {Tay-Wo-Chong, Luis and Komarek, T. and Zellhuber, M. and Lenz, J. and Hirsch, C. and Polifke, W.}, year = {2009}, keywords = {Combustion, Turbulence, Premixed flame}, file = {Tay-Wo-Chong et al_2009_Influence of strain and heat loss on flame stabilization in a non-adiabatic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W6XRFBQB\\Tay-Wo-Chong et al_2009_Influence of strain and heat loss on flame stabilization in a non-adiabatic.pdf:application/pdf}, } @incollection{juniper_machine_2022, title = {Machine {Learning} in {Thermoacoustics}}, isbn = {978-3-031-16247-3}, booktitle = {Machine {Learning} and its {Application} to {Reacting} {Flows}}, publisher = {Springer}, author = {Juniper, M. P.}, editor = {Swaminathan, N.}, year = {2022}, annote = {Springer Contact Amudha Vijayarangan Amudha.V@springer.com }, file = {Juniper_2022_Machine Learning in Thermoacoustics.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CTAZNMIU\\Juniper_2022_Machine Learning in Thermoacoustics.pdf:application/pdf}, } @mastersthesis{Ottin22, address = {Garching, Germany}, title = {Study on the impact of nonlinear damping devices on thermoacoustic limit cycle oscillations using a reduced order time-domain model}, language = {English}, school = {TU München}, author = {Ottinger, Joachim}, year = {2022}, note = {Betreuer: Heilmann}, file = {Ottinger_2022_Study on the impact of nonlinear.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6ULJP389\\Ottinger_2022_Study on the impact of nonlinear.pdf:application/pdf}, } @article{BarweHassa19a, title = {Using machine learning to construct velocity fields from {OH}-{PLIF} images}, url = {http://arxiv.org/abs/1909.13669}, abstract = {This work utilizes data-driven methods to morph a series of time-resolved experimental OH-PLIF images into corresponding three-component planar PIV fields in the closed domain of a premixed swirl combustor. The task is carried out with a fully convolutional network, which is a type of convolutional neural network (CNN) used in many applications in machine learning, alongside an existing experimental dataset which consists of simultaneous OH-PLIF and PIV measurements in both attached and detached flame regimes. Two types of models are compared: 1) a global CNN which is trained using images from the entire domain, and 2) a set of local CNNs, which are trained only on individual sections of the domain. The locally trained models show improvement in creating mappings in the detached regime over the global models. A comparison between model performance in attached and detached regimes shows that the CNNs are much more accurate across the board in creating velocity fields for attached flames. Inclusion of time history in the PLIF input resulted in small noticeable improvement on average, which could imply a greater physical role of instantaneous spatial correlations in the decoding process over temporal dependencies from the perspective of the CNN. Additionally, the performance of local models trained to produce mappings in one section of the domain is tested on other, unexplored sections of the domain. Interestingly, local CNN performance on unseen domain regions revealed the models' ability to utilize symmetry and antisymmetry in the velocity field. Ultimately, this work shows the powerful ability of the CNN to decode the three-dimensional PIV fields from input OH-PLIF images, providing a potential groundwork for a very useful tool for experimental configurations in which accessibility of forms of simultaneous measurements are limited.}, urldate = {2022-01-26}, journal = {arXiv:1909.13669 [physics]}, author = {Barwey, Shivam and Hassanaly, Malik and Raman, Venkat and Steinberg, Adam}, month = sep, year = {2019}, note = {arXiv: 1909.13669}, keywords = {fluid dynamics, Computer Science - Computer Vision and Pattern Recognition, Electrical Engineering and Systems Science - Image and Video Processing}, file = {arXiv Fulltext PDF:C\:\\Users\\niebl\\Zotero\\storage\\BZ9H5978\\Barwey et al. - 2019 - Using machine learning to construct velocity field.pdf:application/pdf;arXiv.org Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\DTJ8IFVV\\1909.html:text/html}, } @article{McCarHaeri19a, title = {Comparison of {Machine} {Learning} {Algorithms} in the {Interpolation} and {Extrapolation} of {Flame} {Describing} {Functions}}, volume = {142}, doi = {10.1115/1.4045516}, abstract = {This report examines and compares commonly used Machine Learning algorithms in their performance in interpolation and extrapolation of FDFs, based on experimental and simulation data. Algorithm performance is evaluated by interpolating and extrapolating an experimentally determined FDF and then the best candidate algorithms are used to find limit cycle amplitudes calculated using the xFDF framework. The best algorithm in interpolation and extrapolation was found to be Gaussian Proccess Regression, when combined with a mean function based on an assumption of the data behaviour in the extrapolation regime. Its performance was closely followed by the widely used cubic spline method and a symbolic regression method. The Gaussian Proccess however, also gives an indication of distance into the extrapolation regime and can be used to carry out uncertainty quantification, in order to understand model sensitivities. This was demonstrated through application to the xFDF framework. The predictive performance and statistical information provided by the Gaussian Process make the best choice of the algorithms investigated here.}, journal = {J. Eng. Gas Turbines and Power}, author = {McCartney, Michael and Haeringer, Matthias and Polifke, Wolfgang}, year = {2020}, keywords = {MediaTUM}, pages = {14}, file = {McCartney et al_2020_Comparison of Machine Learning.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R6PLMST6\\McCartney et al_2020_Comparison of Machine Learning.pdf:application/pdf}, } @article{krugener_coaxial-injector_2022, title = {Coaxial-{Injector} {Surrogate} {Modeling} {Based} on {Reynolds}-{Averaged} {Navier}–{Stokes} {Simulations} {Using} {Deep} {Learning}}, issn = {1533-3876}, url = {https://arc.aiaa.org/doi/10.2514/1.B38696}, doi = {10.2514/1.B38696}, language = {en}, urldate = {2022-08-07}, journal = {Journal of Propulsion and Power}, author = {Krügener, M. and Zapata Usandivaras, J. F. and Bauerheim, M. and Urbano, A.}, month = may, year = {2022}, keywords = {machine learning, surrogate model}, pages = {1--16}, file = {Krügener et al_2022_Coaxial-Injector Surrogate Modeling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MNA4NYJW\\Krügener et al_2022_Coaxial-Injector Surrogate Modeling.pdf:application/pdf}, } @inproceedings{CrociSengu21, title = {Bayesian inference in physics-based nonlinear flame models}, url = {https://openreview.net/forum?id=WppGnva0Qm0}, booktitle = {{NeurIPS} 2021 workshop on deep learning and inverse problems}, author = {Croci, Maximilian L. and Sengupta, Ushnish and Juniper, Matthew P}, year = {2021}, keywords = {Flame dynamics, Data assimilation, Data driven model}, file = {Croci et al_2021_Bayesian inference in physics-based.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RRRPGL9V\\Croci et al_2021_Bayesian inference in physics-based.pdf:application/pdf}, } @article{KulkaGuo21a, title = {Confidence in {Flame} {Impulse} {Response} {Estimation} {From} {Large} {Eddy} {Simulation} {With} {Uncertain} {Thermal} {Boundary} {Conditions}}, volume = {143}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/143/12/121002/1115527/Confidence-in-Flame-Impulse-Response-Estimation}, doi = {10.1115/1.4052022}, number = {12}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Kulkarni, Sagar and Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, month = dec, year = {2021}, keywords = {MediaTUM}, pages = {121002}, file = {Kulkarni et al. - 2021 - Confidence in Flame Impulse Response Estimation Fr.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HPLRPG73\\Kulkarni et al. - 2021 - Confidence in Flame Impulse Response Estimation Fr.pdf:application/pdf}, } @article{mccartney_reducing_2022, title = {Reducing {Uncertainty} in the {Onset} of {Combustion} {Instabilities} using {Dynamic} {Pressure} {Information} and {Bayesian} {Neural} {Networks}}, volume = {144}, doi = {10.1115/1.4052145}, abstract = {Many combustion systems become thermoacoustically unstable around certain operating conditions. The exact onset condition is uncertain because of stochasticity, such as turbulent combustion, and the influence of hidden variables, such as un-measured wall temperatures or differences in geometry within manufacturing tolerances. Practical systems tend to be more elaborate than laboratory systems and tend to have less instrumentation, meaning that they suffer more from uncertainty induced by hidden variables. In many commercial systems, the only direct measurement of the combustor comes from a dynamic pressure sensor. In this study we train a Bayesian Neural Network (BNN) to predict the probability of onset of thermoacoustic instability at various times in the future, using only dynamic pressure measurements and the current operating condition. We show that, on a practical system, the error in the onset time predicted by the BNNs is less than half of the error when using the operating condition alone and more informative than the warning provided by commonly used precursor detection methods. This is demonstrated on two systems: (i) a premixed hydrogen/methane annular combustor, where the hidden variables are wall temperatures that depend on the rate of change of operating condition, and (ii) full scale gas turbines, where the hidden variables arise from differences between the engines.}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {McCartney, Michael and Sengupta, Ushnish and Juniper, Matthew}, year = {2022}, note = {McCarSengu21}, keywords = {MediaTUM}, pages = {011012--1--9}, file = {McCartney et al_2021_Reducing Uncertainty in the Onset of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EWQI39IT\\McCartney et al_2021_Reducing Uncertainty in the Onset of.pdf:application/pdf}, } @inproceedings{haeringer_self-excited_2022, address = {Würzburg, Germany}, title = {Self-excited {Combustion} {Dynamics} in {Multiburner} {Systems}}, volume = {R602}, publisher = {FVV}, author = {Haeringer, Matthias and Polifke, Wolfgang}, month = mar, year = {2022}, keywords = {MediaTUM}, pages = {42}, file = {Haeringer_Polifke_2022_Self-excited Combustion Dynamics in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DYBTDDSI\\Haeringer_Polifke_2022_Self-excited Combustion Dynamics in.pdf:application/pdf}, } @inproceedings{KaiseVaril22, address = {La Jolla, San Diego CA, USA}, title = {Linearizing a turbulent {Bunsen} flame}, booktitle = {18th {International} {Conference} on {Numerical} {Combustion}}, author = {Kaiser, Thomas Ludwig and Varillon, Grégoire and Polifke, Wolfgang and Zirwes, Thorsten and Zhang, Feichi and Bockhorn, Henning and Oberleithner, Kilian}, month = may, year = {2022}, keywords = {published, MediaTUM}, } @mastersthesis{Many22, title = {Combining {Convolutional} {Neural} {Networks} with the {Extended} {RANS} {Equations} for the {Study} of {Canonical} {Turbulent} {Flows}}, school = {TU München}, author = {Many, Maheindrane}, year = {2022}, note = {Betreuer: Silva/Bonnaire}, file = {Many - 2022 - Combining Convolutional Neural Networks with the E.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EMZPBXJ5\\Many - 2022 - Combining Convolutional Neural Networks with the E.pdf:application/pdf}, } @phdthesis{Meind22, type = {Ph.{D}. {Thesis}}, title = {Linearized {Modeling} of {Thermoacoustic} {Systems} utilizing a {Discontinuous} {Galerkin} {Finite} {Element} {Method}}, school = {TU München}, author = {Meindl, Maximilian}, year = {2022}, keywords = {published}, file = {Meindl_2022_Linearized Modeling of Thermoacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z94C5595\\Meindl_2022_Linearized Modeling of Thermoacoustic.pdf:application/pdf}, } @phdthesis{mogler_coupling_2021, type = {Semester {Thesis}}, title = {Coupling of {Thermoacoustic} {Models} by {Power}-{Preserving} {Interconnections}}, school = {TU München}, author = {Mogler, Maximilian}, month = nov, year = {2021}, keywords = {Port-Hamiltonian}, file = {Mogler - 2021 - Coupling of Thermoacoustic Models by Power-Preserv.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8B33WGFQ\\Mogler - 2021 - Coupling of Thermoacoustic Models by Power-Preserv.pdf:application/pdf}, } @inproceedings{KulkaGuo21, address = {Virtual, Online}, series = {{GT2021}-58352}, title = {Confidence in {Flame} {Impulse} {Response} {Estimation} by {LES} with {Uncertain} {Thermal} {Boundary} {Condition}}, url = {https://asmedigitalcollection.asme.org/GT/proceedings-abstract/GT2021/V03AT04A002/1119879}, doi = {10.1115/GT2021-58352}, abstract = {Combustion instabilities are a major cause of concern in the development of gas turbine engines. Hence, there is a need to predict the occurrence of these instabilities during the design phase with simulation tools. Thermoacoustic network models are low computational cost tools that estimate the growth rate of the eigenmodes of the system. These models require information on the flame dynamic response. The combined approach of advanced System identification (SI) and Large Eddy Simulation (LES), externally forced with a carefully designed broadband signal, is an efficient strategy to compute the flame dynamic response to flow perturbation via Finite Impulse Response (FIR). The identified FIR is uncertain due in part to the statistical nature of the estimation procedure (for e.g. low signal-to-noise ratio or finite length of time series) and partly due to uncertainty in the CFD simulation itself caused by uncertain boundary conditions. Carrying out traditional uncertainty quantification techniques, such as multi-layer Monte Carlo, in the framework LES/SI would be computationally prohibitive. As a result, the present paper proposes a surrogate based framework to quantify the uncertainty in the FIR model caused by the joint uncertainty that stems from System Identification on the one hand and boundary conditions in LES on the other. More specifically, we propose a bootstrapping Gaussian Process (GP) surrogate model where in the final trained GP uncertainty contains the uncertainty of SI and the uncertainty in the combustor back plate temperature, which is known to have considerable impact on the Flame Transfer Function. The GP model is trained on the FIRs obtained from the LES+SI of turbulent premixed swirled combustor at different combustor back plate temperatures. Due to the change in the combustor back plate temperature the flame topology changes, which in turn influences the FIR. The trained GP model is successful in interpolating the FIR with confidence intervals covering the “true” FIR from LES/SI.}, publisher = {ASME}, author = {Kulkarni, Sagar and Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, year = {2021}, keywords = {MediaTUM}, file = {Kulkarni et al. - 2021 - Confidence in Flame Impulse Response Estimation by.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KAHDVI7E\\Kulkarni et al. - 2021 - Confidence in Flame Impulse Response Estimation by.pdf:application/pdf}, } @techreport{haeringer_self-excited_2022-1, title = {Self-excited {Combustion} {Dynamics} in {Multiburner} {Systems} - {Final} {Report}}, number = {FVV 1270}, institution = {TU München}, author = {Haeringer, Matthias}, year = {2022}, keywords = {accepted}, pages = {133}, file = {Haeringer_2022_Self-excited Combustion Dynamics in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UT6A494F\\Haeringer_2022_Self-excited Combustion Dynamics in.pdf:application/pdf}, } @inproceedings{haeringer_hybrid_2021, address = {Virtual, Online}, title = {Hybrid {CFD}/low-order modeling of thermoacoustic limit cycle oscillations in can-annular configurations}, author = {Haeringer, Matthias and Polifke, Wolfgang}, year = {2021}, keywords = {archived, accepted}, file = {Haeringer and Polifke - 2021 - Hybrid CFDlow-order modeling of thermoacoustic li.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2SVD3PI3\\Haeringer and Polifke - 2021 - Hybrid CFDlow-order modeling of thermoacoustic li.pdf:application/pdf}, } @phdthesis{Avdon22, type = {Ph.{D}. {Thesis}}, title = {Local modeling and uncertainty quantification of the linear flame response}, school = {TU München}, author = {Avdonin, Alexander}, year = {2022}, file = {Avdonin - 2022 - Local modeling and uncertainty quantification of t.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QFXQ6U98\\Avdonin - 2022 - Local modeling and uncertainty quantification of t.pdf:application/pdf}, } @phdthesis{Buren21, address = {München, Germany}, type = {Ph.{D}. {Thesis}}, title = {Acoustic and {Thermal} {Characterization} of {Quarter}-{Wave} {Resonators}}, language = {English}, school = {TU München}, author = {Buren, S. van}, year = {2021}, file = {Buren - 2021 - Acoustic and Thermal Characterization of Quarter-W.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FU8Q5LXW\\Buren - 2021 - Acoustic and Thermal Characterization of Quarter-W.pdf:application/pdf}, } @mastersthesis{jaiswal_thermal_2021, title = {Thermal {HydraulicModelling} of {Liquid} {Injection} {Cooling}}, school = {Technical University of Munich / Linde}, author = {Jaiswal, Kapil}, month = feb, year = {2021}, file = {Jaiswal, Kapil - Thermal HydraulicModelling of Liquid Injection Coo.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZN7VGNXH\\Jaiswal, Kapil - Thermal HydraulicModelling of Liquid Injection Coo.pdf:application/pdf}, } @inproceedings{fournier_high-accuracy_2021, title = {High-accuracy {FTF} conversion by means of a physics informed model}, author = {Fournier, Guillaume Jean Jacques and Haeringer, Matthias and Polifke, Wolfgang}, year = {2021}, keywords = {on hold, work-in-progress}, } @inproceedings{gopinathan_new_2021, title = {New physical insight from a nonlinear kinematic model of a laminar conical flame}, abstract = {In nonlinear flames, the flame response is typically dependent on both the frequency and magnitude of excitation. Previous studies by researchers have suggested that the nonlinear behaviour may be due to effect of flame curvature on the laminar flame speed or due to movement of the flame base. The present work is motivated by the experimental study of conical flames by Karimi et al. (2009). We obtain the numerical solution of the G-equation using a generalised level-set solver to study the nonlinear flame response of a laminar conical flame to a convected wave with a given frequency \${\textbackslash}omega\$ and a given velocity amplitude \${\textbackslash}epsilon\$. We consider only kinematic effects of the flame and assume constant flame speeds and an incompressible flow. Our preliminary findings show that the dominant nonlinear effect is due to the kinematics of the flame rather than the effects of flame curvature or flame base movement. The flame kinematics cause cusps, the regions with maximum area change and waists, the regions where the flame has a reduced radius. The radial component of the velocity has a maximum at the cusp and a minimum at the waist. The velocity amplitude \${\textbackslash}epsilon\$ and the frequency \${\textbackslash}omega\$ determine the shape of cusps and waists, pinching of flames and the length of the flame. This also explains the amplitude-dependence of the time-lags and the phase saturation of the flame describing function with increasing amplitude. Our findings and observations are in line with the experimental results of Karimi et al. (2009).}, booktitle = {27th {International} {Congress} on {Sound} and {Vibration}, {ICSV} 2021}, publisher = {IIAV}, author = {Gopinathan, Sreenath M. and Heckl, Maria A. and Surendran, Aswathy}, year = {2021}, keywords = {MediaTUM}, file = {Gopinathan et al. - 2021 - New physical insight from a nonlinear kinematic mo.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W8HCTHPF\\Gopinathan et al. - 2021 - New physical insight from a nonlinear kinematic mo.pdf:application/pdf}, } @article{MeindSilva20, title = {On the spurious entropy generation encountered in hybrid linear thermoacoustic models}, volume = {223}, issn = {00102180}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218020304028}, doi = {10.1016/j.combustflame.2020.09.018}, language = {en}, urldate = {2020-11-12}, journal = {Combustion and Flame}, author = {Meindl, Max and Silva, Camilo F. and Polifke, Wolfgang}, month = jan, year = {2021}, keywords = {MediaTUM}, pages = {525--540}, file = {Meindl et al. - 2021 - On the spurious entropy generation encountered in .pdf:C\:\\Users\\niebl\\Zotero\\storage\\BCWM5HFQ\\Meindl et al. - 2021 - On the spurious entropy generation encountered in .pdf:application/pdf;SupplementaryData.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EREZP37M\\SupplementaryData.pdf:application/pdf}, } @article{silva_adjoint-based_2021, title = {Adjoint-based calculation of parametric thermoacoustic maps of an industrial combustion chamber}, volume = {143}, url = {youtu.be/lEUvgyig7mU}, doi = {10.1115/1.4049295]}, number = {1}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Silva, C. F. and Prieto, L. and Ancharek, M. and Marigliani, P. and Mensah, G. A.}, year = {2021}, keywords = {MediaTUM}, pages = {011003}, file = {Silva et al. - 2021 - Adjoint-based calculation of parametric thermoacou.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JBEQ8VST\\Silva et al. - 2021 - Adjoint-based calculation of parametric thermoacou.pdf:application/pdf}, } @article{GuoSilva21, title = {Robust identification of flame frequency response via multi-fidelity {Gaussian} process approach}, volume = {502}, issn = {0022-460X}, url = {https://www.sciencedirect.com/science/article/pii/S0022460X21001553}, doi = {10.1016/j.jsv.2021.116083}, abstract = {Accurate, robust, and efficient identification of flame frequency response (FFR) plays a crucial role in thermoacoustic instability prediction, analysis and control. In order to extract the FFR from high-fidelity numerical simulation time series data, two methods are currently used in the community, which are based on harmonic excitation or broadband excitation, respectively. The former can produce quite accurate FFR estimates even in the presence of significant noise, but only at discrete frequencies; the latter method, which combines broadband forcing and system identification techniques, provides the complete FFR over the frequency range of interest, but may introduce increased levels of uncertainties in the identified results. The present study aims to fully exploit the respective strengths, while avoiding the weaknesses of the two aforementioned methods by proposing a multi-fidelity approach that merges FFR identification results from a short time broadband excitation (low-fidelity) and harmonic excitations at a few select frequencies (high-fidelity). The proposed approach is realized via a machine-learning technique called “Multi-fidelity Gaussian Process.” Our case study demonstrates that the proposed multi-fidelity approach can effectively assimilate the global trend provided by the low-fidelity results and local estimates provided by the high-fidelity results, thus leading to a globally accurate and robust FFR identification even in the presence of strong noise. In addition, we investigate the impact of the number and locations of harmonic forcing frequencies on the performance of the proposed approach. Finally, we employ the proposed multi-fidelity framework to identify the FFR of a turbulent premixed swirl burner test rig based on previously published data, which further highlights the capability and flexibility of the proposed approach in real applications.}, language = {en}, urldate = {2021-03-26}, journal = {Journal of Sound and Vibration}, author = {Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, month = jun, year = {2021}, keywords = {MediaTUM}, pages = {116083}, file = {Guo et al. - 2021 - Robust identification of flame frequency response .pdf:C\:\\Users\\niebl\\Zotero\\storage\\W9EVKPLK\\Guo et al. - 2021 - Robust identification of flame frequency response .pdf:application/pdf}, } @inproceedings{PurwaMeind21, series = {{GT2021}-59972}, title = {Comparison of model order reduction methods in thermoacoustic stability analysis}, abstract = {Thermoacoustic instabilities are a major challenge in the development of modern low-emission gas turbines. Thermoacoustic stability analysis is a crucial step in the design phase of these turbines. Uncertainty quantification and parametric studies for this analysis require repeated computations of models with large degrees of freedom, which can be prohibitively expensive. Model order reduction (MOR) plays a pivotal role in reducing this computational cost by finding a reduced order model (ROM) with significantly less degrees of freedom than the full order model (FOM), but featuring approximately the same dynamics. In this proof-of-concept study, the acoustic wave propagation is modeled by a 1D network approach, while the flow-flame interaction is accounted for by a Flame Transfer Function (FTF). We employ MOR to the acoustic subsystem, which usually contributes most to the degrees of freedom to the overall setup, and couple it to the FTF after the reduction. Projective MOR techniques employ projection of the FOM onto an appropriate subspace to obtain the ROM. It is the choice of this subspace that differentiates the various techniques. This study demonstrates the application of three reduction techniques to the acoustic subsystem - modal reduction, truncated balanced realization (TBR) and iterative rational Krylov algorithm (IRKA). Modal reduction, a commonly used MOR method in thermoacoustics, is based on building a modal basis using the eigenmodes of the full order acoustic model. Instead of preserving the eigenmodes, TBR and IRKA are based on preserving the transfer behavior of the FOM. TBR uses balancing of controllability and observability Grammians of the full system to obtain the ROM, whereas, IRKA iteratively finds the expansion points to optimally match moments of the transfer function of the full system. The modes computed from reduced systems coupled to the FTF are compared with the modes from the coupled FOM system to assess the suitability of the reduction techniques. Results show that although the reduced system from the modal reduction method correctly captures the thermoacoustic cavity modes, it fails to capture the intrinsic thermoacoustic mode, which is a marginally stable mode for the FOM coupled system. On the contrary, ROMs from TBR and IRKA methods accurately predict both cavity and intrinsic thermoacoustic modes. Thus, model order reduction methods based on transfer behavior of the system are more suitable than the methods based on the eigenmodes for thermoacoustic stability analysis.}, booktitle = {{ASME} {Turbo} {Expo} 2021: {Turbomachinery} {Technical} {Conference} and {Exposition}}, author = {Purwar, Naman and Meindl, Maximilian and Polifke, Wolfgang}, year = {2021}, keywords = {archived, MediaTUM}, file = {Purwar et al. - 2021 - Comparison of model order reduction methods in the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\E8LXSNEY\\Purwar et al. - 2021 - Comparison of model order reduction methods in the.pdf:application/pdf}, } @article{SchilKomar21, title = {A criterion for thermo-acoustic stability based on the flux of acoustic energy}, volume = {227}, issn = {00102180}, doi = {10.1016/j.combustflame.2021.01.014}, language = {en}, journal = {Combustion and Flame}, author = {Schily, Felix and Komarek, Thomas and Polifke, Wolfgang}, month = may, year = {2021}, note = {tex.ids= SchilKomar21}, keywords = {MediaTUM}, pages = {238--254}, file = {SchilKomar21_Supplement1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PYTVE8HW\\SchilKomar21_Supplement1.pdf:application/pdf;SchilKomar21_Supplement2.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BISZH7TJ\\SchilKomar21_Supplement2.pdf:application/pdf;Schily et al. - 2021 - A criterion for thermo-acoustic stability based on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DT6U79RJ\\Schily et al. - 2021 - A criterion for thermo-acoustic stability based on.pdf:application/pdf}, } @inproceedings{surendran_influence_2021, title = {Influence of perforated plates on the acoustic field of simple duct systems}, abstract = {We consider a simple duct system comprising a tube with mean flow in the axial direction and with a transverse perforated plate occupying the whole cross-section. The perforated plate, which is situated at some point along the tube axis, has several effects on the acoustic field in the tube: (1) It divides the tube into two chambers, which act like coupled acoustic resonators, and the properties of the perforated plate determine the nature of the coupling. (2) It acts as an acoustic scatterer. (3) Vortices shed at the edges of the perforations can absorb acoustic energy, but they can also generate acoustic energy. We examine these effects in detail with a largely analytical approach. Our preliminary observations indicate that by varying the perforation spacing, the location of the scatterer within the duct or the incident velocity, one can induce an unstable eigenmode or an instability, or excite instability in different sections of the duct (resonator switching). This opens up the possibility of viewing perforated plates as versatile acoustic elements than can not only absorb acoustic energy but also isolate instabilities to specific sections of the duct system.}, booktitle = {27th {International} {Congress} on {Sound} and {Vibration}, {ICSV} 2021}, publisher = {IIAV}, author = {Surendran, Aswathy and Gopinathan, Sreenath Malamal and Heckl, Maria A.}, year = {2021}, keywords = {MediaTUM}, file = {Surendran et al. - 2021 - Influence of perforated plates on the acoustic fie.pdf:C\:\\Users\\niebl\\Zotero\\storage\\THYL5BJ9\\Surendran et al. - 2021 - Influence of perforated plates on the acoustic fie.pdf:application/pdf}, } @article{AlbayBlume17, title = {An {Analytical} {Model} for the {Impulse} {Response} of {Laminar} {Premixed} {Flames} to {Equivalence} {Ratio} {Perturbations}}, volume = {36}, issn = {1540-7489}, doi = {10.1016/j.proci.2016.06.002}, number = {3}, journal = {Proceedings of the Combustion Institute}, author = {Albayrak, A. and Blumenthal, R. S. and Ulhaq, A. and Polifke, W.}, year = {2017}, keywords = {MediaTUM, dispersion, Flame frequency response, impulse response, Laminar premixed flame dynamics, Equivalence ratio fluctuations}, pages = {3725--3732}, file = {Albayrak et al_2017_An analytical model for the impulse response of laminar premixed flames to.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ERA5RDHF\\Albayrak et al_2017_An analytical model for the impulse response of laminar premixed flames to.pdf:application/pdf}, } @article{PurwaHaeri21, title = {Flame response to transverse velocity excitation leading to frequency doubling and modal coupling}, volume = {230}, issn = {00102180}, doi = {10.1016/j.combustflame.2021.111412}, language = {en}, journal = {Combustion and Flame}, author = {Purwar, Naman and Haeringer, Matthias and Schuermans, Bruno and Polifke, Wolfgang}, month = aug, year = {2021}, keywords = {MediaTUM}, pages = {111412}, file = {Purwar et al. - 2021 - Flame response to transverse velocity excitation l.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8L23RI8N\\Purwar et al. - 2021 - Flame response to transverse velocity excitation l.pdf:application/pdf}, } @article{barwey_experimental_2019, title = {Experimental data-based reduced-order model for analysis and prediction of flame transition in gas turbine combustors}, volume = {23}, issn = {1364-7830, 1741-3559}, url = {https://www.tandfonline.com/doi/full/10.1080/13647830.2019.1602286}, doi = {10.1080/13647830.2019.1602286}, language = {en}, number = {6}, urldate = {2020-12-21}, journal = {Combustion Theory and Modelling}, author = {Barwey, Shivam and Hassanaly, Malik and An, Qiang and Raman, Venkat and Steinberg, Adam}, month = nov, year = {2019}, pages = {994--1020}, file = {Barwey et al_2019_Experimental data-based reduced-order.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F4Z5G4EF\\Barwey et al_2019_Experimental data-based reduced-order.pdf:application/pdf}, } @article{yu_data-driven_2020, title = {A data-driven kinematic model of a ducted premixed flame}, issn = {15407489}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1540748920302170}, doi = {10.1016/j.proci.2020.06.137}, language = {en}, urldate = {2020-12-18}, journal = {Proceedings of the Combustion Institute}, author = {Yu, Hans and Juniper, Matthew P. and Magri, Luca}, month = aug, year = {2020}, pages = {S1540748920302170}, file = {Yu et al_2020_A data-driven kinematic model of a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BI49GFTH\\Yu et al_2020_A data-driven kinematic model of a.pdf:application/pdf}, } @inproceedings{orchini_thermoacoustic_2020, address = {Chicago}, title = {Thermoacoustic modes of intrinsic and acoustic origin and their interplay with exceptional points}, abstract = {Historically, it has been presumed that thermoacoustic (TA) modes are tightly related to the acoustic modes of the cavity in which combustion takes place. Under this paradigm, a TA mode is seen as an acoustic mode that has been perturbed by the influence of an active flame. It should therefore be possible to track the evolution of acoustic modes into their corresponding TA modes by gradual increments in flame response gain, n. However, in the past few years it has been shown that this tracking is not always straightforward, due to the existence of thermoacoustic modes of 'intrinsic' origin (ITA), which persist also in anechoic conditions. Ambiguity arises in defining the origin of TA modes because two different parameters, flame strength and reflection coefficient, are usually used to define the acoustic and ITA limits. We show that this distinction is instead unique if only one parameter, n, is used to define their origin. We prove, with the help of analytical expressions, that the sets of TA modes of ITA and acoustic origins are distinct in the limit of zero n. Tracking their trajectory by increasing n is then straightforward. We numerically show that the TA eigenfrequencies follow non-monotonic trajectories, and may coalesce at Exceptional Points (EP).}, booktitle = {Bulletin of the {American} {Physical} {Society}}, author = {Orchini, Alessandro and Silva, Camilo F. and Mensah, Georg A. and Moeck, J. P.}, month = nov, year = {2020}, keywords = {MediaTUM}, file = {Orchini et al. - 2020 - Thermoacoustic modes of intrinsic and acoustic ori.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5JY9HK4K\\Orchini et al. - 2020 - Thermoacoustic modes of intrinsic and acoustic ori.pdf:application/pdf}, } @article{ghani_data-driven_2020, title = {Data-{Driven} {Identification} of {Nonlinear} {Flame} {Models}}, volume = {142}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/doi/10.1115/1.4049071/1090558/DataDriven-Identification-of-Nonlinear-Flame}, doi = {10.1115/1.4049071}, abstract = {This paper presents a data-driven identification framework with the objective to retrieve a flame model from the nonlinear limit cycle. The motivation is to identify a flame model for configurations, which do not allow the determination of the flame dynamics: that is commonly for industrial applications where (i) optical access for nonintrusive measurements of velocity and heat release fluctuations are not feasible and (ii) unstable combustion is monitored via multiple pressure recordings. To demonstrate the usefulness of the method, we chose three test cases: (i) a classical Rijke tube; (ii) an experiment of a laminar flame (EM2C case), (iii) and a high-pressure, turbulent premixed flame (German Aerospace Center (DLR) case). The procedure is as follows: First, acoustic network models for the three cases are generated for which the in-house software taX is employed. Next, the acoustic network models are embedded in an optimization framework with the objective to identify flame parameters that match the experimental limit cycle data: based on the instability frequency and pressure amplitudes, we formulate physical constraints and an objective function in order to identify the flame model parameters gain nopt and time delay τopt in the nonlinear regime. We demonstrate for the three cases that the identified flame parameters reproduce the unstable combustion processes and highlight the usefulness of the method for control purposes.}, language = {en}, number = {12}, urldate = {2020-12-07}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Ghani, Abdulla and Boxx, Isaac and Noren, Carrie}, month = dec, year = {2020}, keywords = {MediaTUM}, pages = {121015}, file = {Ghani et al_2020_Data-Driven Identification of Nonlinear.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6J2IYWV2\\Ghani et al_2020_Data-Driven Identification of Nonlinear.pdf:application/pdf}, } @inproceedings{polifke_thermoacoustic_2020, address = {Yogyakarta, Indonesia}, title = {Thermoacoustic {Instabilities} — a {Fascinating} {Phenomenon} with {Important} {Consequences} for {Low}-{Emission} {Combustion} {Technology}}, booktitle = {11th {International} {Conference} of {Thermofluids} 2020}, author = {Polifke, Wolfgang}, year = {2020}, keywords = {kein Paper eingereicht - nur Vortrag}, } @article{orchini_degenerate_2020, title = {Degenerate perturbation theory in thermoacoustics: high-order sensitivities and exceptional points}, volume = {903}, issn = {0022-1120, 1469-7645}, shorttitle = {Degenerate perturbation theory in thermoacoustics}, url = {https://www.cambridge.org/core/product/identifier/S0022112020005868/type/journal_article}, doi = {10.1017/jfm.2020.586}, abstract = {Abstract , In this study, we connect concepts that have been recently developed in thermoacoustics, specifically (i) high-order spectral perturbation theory, (ii) symmetry-induced degenerate thermoacoustic modes, (iii) intrinsic thermoacoustic modes and (iv) exceptional points. Their connection helps gain physical insight into the behaviour of the thermoacoustic spectrum when parameters of the system are varied. First, we extend high-order adjoint-based perturbation theory of thermoacoustic modes to the degenerate case. We provide explicit formulae for the calculation of the eigenvalue corrections to any order. These formulae are valid for self-adjoint, non-self-adjoint or even non-normal systems; therefore, they can be applied to a large range of problems, including fluid dynamics. Second, by analysing the expansion coefficients of the eigenvalue corrections as a function of a parameter of interest, we accurately estimate the radius of convergence of the power series. Third, we connect the existence of a finite radius of convergence to the existence of singularities in parameter space. We identify these singularities as exceptional points, which correspond to defective thermoacoustic eigenvalues, with infinite sensitivity to infinitesimal changes in the parameters. At an exceptional point, two eigenvalues and their associated eigenvectors coalesce. Close to an exceptional point, strong veering of the eigenvalue trajectories is observed. As demonstrated in recent work, exceptional points naturally arise in thermoacoustic systems due to the interaction between modes of acoustic and intrinsic origin. The role of exceptional points in thermoacoustic systems sheds new light on the physics and sensitivity of thermoacoustic stability, which can be leveraged for passive control by small design modifications.}, language = {en}, urldate = {2020-10-05}, journal = {Journal of Fluid Mechanics}, author = {Orchini, Alessandro and Magri, Luca and Silva, Camilo F. and Mensah, Georg A. and Moeck, Jonas P.}, month = nov, year = {2020}, keywords = {MediaTUM}, pages = {A37}, file = {Orchini et al. - 2020 - Degenerate perturbation theory in thermoacoustics.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IVJR7XYU\\Orchini et al. - 2020 - Degenerate perturbation theory in thermoacoustics.pdf:application/pdf}, } @inproceedings{SchaeGuo20, address = {Virtual, Online}, series = {{GT2020}-15496}, title = {The impact of exceptional points on the confidence of thermoacoustic stability analysis}, url = {youtu.be/SR1E0aKYpNk}, booktitle = {{ASME} {Turbo} {Expo} 2020: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Schaefer, Felicitas and Guo, Shuai and Polifke, Wolfgang}, year = {2020}, note = {youtu.be/SR1E0aKYpNk}, keywords = {MediaTUM}, file = {Schaefer et al. - 2020 - The impact of exceptional points on the confidence.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9FNK5CX2\\Schaefer et al. - 2020 - The impact of exceptional points on the confidence.pdf:application/pdf}, } @article{Tay-WZellh15, title = {Combined {Influence} of {Strain} and {Heat} {Loss} on {Turbulent} {Premixed} {Flame} {Stabilization}}, volume = {97}, issn = {1386-6184}, url = {https://rdcu.be/6fWj}, doi = {10.1007/s10494-015-9679-0}, number = {1}, journal = {Flow, Turbulence and Combustion}, author = {Tay-Wo-Chong, Luis and Zellhuber, M. and Komarek, T. and Im, Hong G. and Polifke, W.}, year = {2015}, keywords = {published}, pages = {263--294}, annote = { Dear Author, Congratulations on publishing "Combined Influence of Strain and Heat Loss on Turbulent Premixed Flame Stabilization" in Flow, Turbulence and Combustion. As part of the Springer Nature SharedIt initiative, you can now publicly share a full-text view-only version of your paper by using the link below. If you have selected an Open Access option for your paper, or where an individual can view content via a personal or institutional subscription, recipients of the link will also be able to download and print the PDF. All readers of your article via the shared link will also be able to use Enhanced PDF features such as annotation tools, one-click supplements, citation file exports and article metrics. https://rdcu.be/6fWj We encourage you to forward this link to your co-authors, as sharing your paper is a great way to improve the visibility of your work. There are no restrictions on the number of people you may share this link with, how many times they can view the linked article or where you can post the link online. More information on Springer Nature’s commitment to content sharing is available here. Sincerely, Springer Nature }, annote = {see also Carbonell et al 2009 , enthapy-defect flamelets,}, file = {Tay-Wo-Chong et al_2015_Combined Influence of Strain and Heat.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Y6WNKFB9\\Tay-Wo-Chong et al_2015_Combined Influence of Strain and Heat.pdf:application/pdf}, } @misc{broderick_variational_2018, address = {Lugano, Switzerland}, title = {Variational {Bayes} and {Beyond}}, author = {Broderick, tamara}, year = {2018}, file = {broderick_tutorial_2018_usi_part_i.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H2VMUAKL\\broderick_tutorial_2018_usi_part_i.pdf:application/pdf;broderick_tutorial_2018_usi_part_ii.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XPQ3AD9Y\\broderick_tutorial_2018_usi_part_ii.pdf:application/pdf;broderick_tutorial_2018_usi_part_iii.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2BTKGXJD\\broderick_tutorial_2018_usi_part_iii.pdf:application/pdf;broderick_tutorial_2018_usi_part_iv.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZS6XS4GG\\broderick_tutorial_2018_usi_part_iv.pdf:application/pdf}, } @article{caldwell_bat_2010, title = {{BAT} - {The} {Bayesian} {Analysis} {Toolkit}}, volume = {219}, issn = {1742-6596}, url = {https://iopscience.iop.org/article/10.1088/1742-6596/219/3/032013}, doi = {10.1088/1742-6596/219/3/032013}, number = {3}, urldate = {2020-11-05}, journal = {Journal of Physics: Conference Series}, author = {Caldwell, Allen C and Kollár, Daniel and Kröninger, Kevin}, month = apr, year = {2010}, pages = {032013}, file = {Caldwell et al_2010_BAT - The Bayesian Analysis Toolkit.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EMAFEJ42\\Caldwell et al_2010_BAT - The Bayesian Analysis Toolkit.pdf:application/pdf}, } @article{schmid_description_2018, title = {Description and detection of burst events in turbulent flows}, volume = {1001}, journal = {Journal of Physics: Conf. Series}, author = {Schmid, P. J. and Garcı́a-Gutierrez, A. and Jiménez, J.}, year = {2018}, pages = {012015}, annote = {Anh Khoa, Oct '20:   Dear Marcin and Wolfgang,   My memory reminded me wrong and it was not KAUST who is active in this research but Cornell University with Perrine Pepiot and a method called "directed relation graph with error propagation" (DRGEP)... (The presentation I attended on this topic dates from 2017 at the Numerical Combustion Meeting...).   I have added a few papers on that topic in zotero (in the new folder: "Method \& Tools/Chemistry Reduction"). In this email, for convenience, I attach the "original" paper with that method (there are more recent use of this technique, but it's a starting point) and I also give a link to a presentation similar to the one I attended back then: https://vod.video.cornell.edu/media/CAM+Colloquium\%2C+2017-03-03+-+Perrine+PepiotA+Progress+and+challenges+in+simulating+combustion+systems+with+realistic+chemistry/1\_dxwej84r Interestingly, Perrine Pepiot did her PhD on this topic with Prof. Pitsch who is now in Aachen but I don't know if he is still active in chemistry reduction techniques.   Finally, I also attach a paper by P. J. Schmid which is on the other topic I mentioned earlier: detection of burst using graph/community-based approaches.   Hope this is of interest.   Best regards,   Anh Khoa}, file = {Schmid, Garciá-Gutierrez, Jiménez - 2018 - Description and detection of burst events in turbulent flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PWVNMJ6N\\Schmid, Garciá-Gutierrez, Jiménez - 2018 - Description and detection of burst events in turbulent flows.pdf:application/pdf}, } @inproceedings{violato_d_acoustical_2016, address = {The Hague, Netherlands}, title = {Acoustical characteristics of two-phase horizontal pipe flow through an orifice}, volume = {12}, abstract = {Noise generated by choke devices such valves or orifices is an issue for industrial applications and automotive air-conditioning circuits. While the acoustic behavior of choke items operating in single phase regime has been studied in details and standards are available to predict noise emissions when operating with either a gas [1] or a liquid medium [2], little experimental-based understanding is available on valve noise generated by two-phase flow. This study describes research efforts along this direction. In this work, experiments have been conducted to understand the acoustic characteristics of a two-phase horizontal flow through an orifice by means of unsteady-pressure measurements and flow visualization. Orifice geometries with a sharp and round edge are investigated in stratified and stratified-wavy flow regime, where phase \#1 is air to which “small” quantities of water are added. This paper will focus on the round orifice with a diameter of 5 mm. Finally this study offers an experimental assessment of the aerodynamic noise prediction method NEN-EN-IEC-60534-8-3 for control valves in dry gas conditions [1] and compares it with the approach proposed by Reethof \& Ward [3] to discuss advantages and disadvantages of the two approaches.}, booktitle = {11th {International} {Conference} on {Flow}-{Induced} {Vibration}}, author = {{Violato, D} and {Lee, J.S} and {Belfroid, S}}, month = jul, year = {2016}, file = {Violato, D et al_2016_Acoustical characteristics of two-phase horizontal pipe flow through an orifice.pdf:C\:\\Users\\niebl\\Zotero\\storage\\E6P544TZ\\Violato, D et al_2016_Acoustical characteristics of two-phase horizontal pipe flow through an orifice.pdf:application/pdf}, } @book{vollant_optimal_2014, address = {Stanford, United States}, title = {Optimal estimator and artificial neural network as efficient tools for the subgrid-scale scalar flux modeling}, url = {https://hal.archives-ouvertes.fr/hal-01070983}, abstract = {This work is devoted to exploring a new procedure to develop subgrid-scale (SGS) models in the context of large-eddy simulation (LES) of a passive scalar. Starting from the Noll's formula (Noll 1967), the concept of an optimal estimator is first used to de- termine an accurate set of parameters to derive a SGS model. The SGS model is then defined as a surrogate model built from this set of parameters by training an artificial neural network (ANN) on a filtered DNS database. This ANN model is next compared with the dynamic nonlinear tensorial diffusivity (DNTD) model proposed by Wang et al. (2007). The DNTD model is also based on Noll's formula, and can be seen as a nonlinear extension of the dynamic eddy-diffusivity (DED) model proposed by Moin et al. (1991). The a priori and a posteriori tests performed on the ANN model demonstrate the abil- ity of this new model to well reproduce the behavior of the exact SGS term, and show an improvement in comparison with DED and DNTD models. The concept of optimal estimator associated with machine learning procedure thus appears as a useful tool for SGS model development}, urldate = {2018-03-05}, author = {Vollant, Antoine and Balarac, Guillaume and Geraci, Gianluca and Corre, Christophe Eric}, year = {2014}, keywords = {machine learning}, file = {HAL Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\9IAQUNWQ\\hal-01070983.html:text/html;Vollant- 2014 . Optimal estimator and ANN as efficient tools for the subgrid scalar flux modelling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NFDB57GK\\Vollant- 2014 . Optimal estimator and ANN as efficient tools for the subgrid scalar flux modelling.pdf:application/pdf}, } @techreport{yuen_real_2003, type = {internal}, title = {A {Real} {Time} {Modeling} and {Simulation} {Tool} for {Thermoacoustic} {Systems} and the {Effects} of {Acoustic} {Boundary} {Conditions} on the {Identifiability} of such {Systems}}, institution = {TU München}, author = {Yuen, S W and Gentemann, A M G and Polifke, W}, month = apr, year = {2003}, file = {Yuen et al_2003_A Real Time Modeling and Simulation Tool for Thermoacoustic Systems and the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NTBBCHIR\\Yuen et al_2003_A Real Time Modeling and Simulation Tool for Thermoacoustic Systems and the.pdf:application/pdf}, } @inproceedings{yuen_influence_2004, address = {Saint-Petersburg, Russia}, title = {Influence of {Boundary} {Reflection} {Coefficient} on the {System} {Identifiability} of {Acoustic} {Two}-{Ports}}, booktitle = {{ICSV} 11}, publisher = {IIAV}, author = {Yuen, S. W. and Gentemann, A. M. G. and Polifke, W.}, year = {2004}, keywords = {Low order model, Simulation + Modelling, transfer matrix}, pages = {3501--3508}, file = {Yuen et al_2004_Investigation of the Influence of Boundary Conditions on System Identifiability.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HJHR6ZJK\\Yuen et al_2004_Investigation of the Influence of Boundary Conditions on System Identifiability.pdf:application/pdf}, } @phdthesis{Zellh13, type = {{PhD} {Thesis}}, title = {High {Frequency} {Response} of {Auto}-{Ignition} and {Heat} {Release} to {Acoustic} {Perturbations}}, url = {http://mediatum.ub.tum.de/download/1145858/1145858.pdf}, school = {TU München}, author = {Zellhuber, M.}, year = {2013}, file = {Zellhuber_2013_High Frequency Response of Auto-Ignition and Heat Release to Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6G3GBU68\\Zellhuber_2013_High Frequency Response of Auto-Ignition and Heat Release to Acoustic.pdf:application/pdf}, } @inproceedings{zellhuber_modelling_2011, address = {Cardiff, UK}, title = {Modelling the {Impact} of {Acoustic} {Pressure} {Waves} on {Auto}-{Ignition} {Flame} {Dynamics}}, booktitle = {European {Combustion} {Meeting}, {ECM2011}}, publisher = {British Section of the Combustion Institute}, author = {Zellhuber, M. and Bellucci, V. and Schuermans, B. and Polifke, W.}, month = jun, year = {2011}, keywords = {Combustion, Thermoacoustics, Auto-ignition, Delay variations, Pressure impact}, file = {Zellh+Bellu+11.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F2QDZKFX\\Zellh+Bellu+11.pdf:application/pdf}, } @inproceedings{zellhuber_large_2013, address = {Dresden}, title = {Large {Eddy} {Simulation} of {High} {Frequency} {Flame} {Dynamics} in {Perfect} {Premixed} {Combustors} with {Elevated} {Inlet} {Temperatures}}, booktitle = {{DLES}-9 {Workshop}}, author = {Zellhuber, M. and Polifke, W.}, month = apr, year = {2013}, file = {Zellhuber_Polifke_2013_Large Eddy Simulation of High Frequency Flame Dynamics in Perfect Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W3DFITDV\\Zellhuber_Polifke_2013_Large Eddy Simulation of High Frequency Flame Dynamics in Perfect Premixed.pdf:application/pdf}, } @inproceedings{zellhuber_by_2013, title = {{BY} 13 {GV}: {Hochfrequente} {Instabilitäten} der {Verbrennung} mit {Selbstzündung}}, booktitle = {Abschlussbericht {Forschungsinitiative} ''{Kraftwerke} des 21. {Jahrhunderts} ({KW21})''}, author = {Zellhuber, M. and Polifke, W.}, editor = {Sattelmayer, T. and Aigner, M.}, month = oct, year = {2013}, pages = {750--769}, file = {Zellhuber_Polifke_2013_BY 13 GV.pdf:C\:\\Users\\niebl\\Zotero\\storage\\36C8DVSZ\\Zellhuber_Polifke_2013_BY 13 GV.pdf:application/pdf}, } @incollection{zellhuber_large_2015, title = {Large {Eddy} {Simulation} of {High} {Frequency} {Flame} {Dynamics} in {Perfect} {Premixed} {Combustors} with {Elevated} {Inlet} {Temperatures}}, url = {http://www.springer.com/materials/mechanics/book/978-3-319-14447-4}, booktitle = {Direct and {Large}-{Eddy} {Simulation} {IX}}, publisher = {Springer}, author = {Zellhuber, M. and Polifke, W.}, editor = {Fröhlich, J. and Kuerten, H. and Geurts, B.J.and Armenio, V.}, year = {2015}, file = {Zellhuber_Polifke_2015_Large Eddy Simulation of High Frequency Flame Dynamics in Perfect Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3T2HGK4G\\Zellhuber_Polifke_2015_Large Eddy Simulation of High Frequency Flame Dynamics in Perfect Premixed.pdf:application/pdf}, } @article{ZellhSchue14, series = {1}, title = {Impact of {Acoustic} {Pressure} on {Auto}-{Ignition} and {Heat} {Release}}, volume = {18}, url = {http://www.tandfonline.com/eprint/ZDmKhqfbqZzY9tpBRrDC/full}, doi = {10.1080/13647830.2013.817609}, journal = {Combustion Theory and Modelling}, author = {Zellhuber, M. and Schuermans, B. and Polifke, W.}, year = {2014}, pages = {1--31}, file = {CTM_Erratum.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZZJ7R4K8\\CTM_Erratum.pdf:application/pdf;Impact of acoustic pressure on autoignition and heat release.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D275GWJG\\Impact of acoustic pressure on autoignition and heat release.pdf:application/pdf}, } @article{ZellhSchwi14, series = {1}, title = {Experimental and {Numerical} {Investigation} of {Thermo}-{Acoustic} {Sources} {Related} to {High}-{Frequency} {Instabilities}}, volume = {6}, url = {http://multi-science.metapress.com/content/g24n7106723204g6/}, doi = {10.1260/1756-8277.6.1.1}, journal = {Int. J. Spray and Combustion Dynamics}, author = {Zellhuber, M. and Schwing, J. and Schuermans, B. and Sattelmayer, T. and Polifke, W.}, year = {2014}, pages = {1--34}, file = {Zellhuber et al_2014_Experimental and Numerical Investigation of Thermo-Acoustic Sources Related to.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JUQE9Q2P\\Zellhuber et al_2014_Experimental and Numerical Investigation of Thermo-Acoustic Sources Related to.pdf:application/pdf}, } @inproceedings{zellhuber_development_2009, address = {Köln}, title = {Development of an {OH}*/{CH}* chemiluminescence postprocessor for premixed turbulent flames}, booktitle = {{AG} {Turbo} {Meeting}}, author = {Zellhuber, M. and Tay-Wo-Chong, L. and Komarek, T. and Huber, A. and Polifke, W.}, month = mar, year = {2009}, file = {OH_ppr_TUM_AGTurbo_Notizen-1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8KRA6Z95\\OH_ppr_TUM_AGTurbo_Notizen-1.pdf:application/pdf;OH_ppr_TUM_AGTurbo-1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WSFFR6A2\\OH_ppr_TUM_AGTurbo-1.pdf:application/pdf;Zellhuber et al_2009_Development of an OH-CH chemiluminescence postprocessor for premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I5E3FEKI\\Zellhuber et al_2009_Development of an OH-CH chemiluminescence postprocessor for premixed.pdf:application/pdf}, } @inproceedings{zellhuber_model_2010, address = {Darmstadt, Germany}, title = {Model for the {Influence} of {Strain} and {Heat} {Loss} on {Turbulent} {Combustion} in {Shear} {Layers} adjacent to {Non}-{Adiabatic} {Combustor} {Walls}}, booktitle = {International {Workshop} on {Near}-{Wall} {Reactive} {Flows}}, publisher = {Center of SMART INTERFACES (CSI) / SFB568 ''Flow and Combustion in Future Gas Turbine Combustion Chambers''}, author = {Zellhuber, M. and Tay-Wo-Chong, L. and Komarek, T. and Polifke, W.}, month = nov, year = {2010}, file = {Zellhuber et al_2010_Model for the Description of Strain and Heat Loss Influence on Turbulent Shear.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R2373B84\\Zellhuber et al_2010_Model for the Description of Strain and Heat Loss Influence on Turbulent Shear.pdf:application/pdf}, } @phdthesis{zellhuber_optimierung_2008, type = {Diploma {Thesis}}, title = {Optimierung des {TFC}-{Verbrennungsmodells} im {Hinblick} auf {Wärmeverluste} und {Turbulenz}-{Chemie}-{Interaktion}}, author = {Zellhuber, Mathieu}, year = {2008}, file = {Zellhuber_2008_Optimierung des TFC-Verbrennungsmodells im Hinblick auf Wärmeverluste und.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6BUUDPJK\\Zellhuber_2008_Optimierung des TFC-Verbrennungsmodells im Hinblick auf Wärmeverluste und.pdf:application/pdf}, } @article{ZellhMeran13, series = {9}, title = {Large {Eddy} {Simulation} of {Flame} {Response} to {Transverse} {Acoustic} {Excitation} in a {Model} {Reheat} {Combustor}}, volume = {135}, doi = {10.1115/1.4024940}, journal = {J. Eng. Gas Turbines Power}, author = {Zellhuber, Mathieu and Meraner, Christoph and Kulkarni, Rohit and Polifke, Wolfgang and Schuermans, Bruno}, year = {2013}, pages = {091508--1--9}, file = {Zellhuber et al_2012_Large Eddy Simulation of Flame Response to Transverse Acoustic Excitation in a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FBVNESRD\\Zellhuber et al_2012_Large Eddy Simulation of Flame Response to Transverse Acoustic Excitation in a.pdf:application/pdf;Zellhuber et al_2013_Large Eddy Simulation of Flame Response to Transverse Acoustic Excitation in a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DP7JVT8J\\Zellhuber et al_2013_Large Eddy Simulation of Flame Response to Transverse Acoustic Excitation in a.pdf:application/pdf}, } @phdthesis{engelsman_study_2020, type = {M.{Eng} {Thesis}}, title = {A {Study} of a {Genetic} {Algorithm} for {Polydisperse} {Spray} {Flames}}, school = {Technion-Israel Institute of Technology}, author = {Engelsman, Barry}, year = {2020}, file = {Engelsman_2020_A Study of a Genetic Algorithm for.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VBY3SMJW\\Engelsman_2020_A Study of a Genetic Algorithm for.pdf:application/pdf}, } @phdthesis{Kuhn17, type = {Semester {Thesis}}, title = {Linearized reactive flow with equivalence ratio perturbations}, url = {https://mediatum.ub.tum.de/1435328}, school = {Technical University of Munich}, author = {Kühn, Maximilian}, year = {2017}, annote = {Supervisor: Avdonin}, file = {MK_LRFwithEquivalenceRatioPerturbations_final.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M6F36E8S\\MK_LRFwithEquivalenceRatioPerturbations_final.pdf:application/pdf;SemesterThesis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MQU5XKMQ\\SemesterThesis.pdf:application/pdf}, } @incollection{Polif07, address = {Rhode-St-Genèse, BE}, series = {{VKI} {LS} 2007-09}, title = {System modelling and stability analysis}, isbn = {13 978-2-930389-79-6}, booktitle = {Basics of {Aeroacoustics} and {Thermoacoustics}}, publisher = {Von Karman Institute}, author = {Polifke, W.}, editor = {Anthoine, J.}, month = dec, year = {2007}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, pages = {1--51}, file = {Polifke_2007_System modelling and stability analysis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K2S49W4S\\Polifke_2007_System modelling and stability analysis.pdf:application/pdf}, } @article{PolifDobbe96, title = {A {NOx} {Prediction} {Scheme} for {Lean}-{Premixed} {Gas} {Turbine} {Combustion} {Based} on {Detailed} {Chemical} {Kinetics}}, volume = {118}, number = {4}, journal = {J. Eng. Gas Turbines and Power}, author = {Polifke, W. and Döbbeling, K. and Sattelmayer, T. and Nicol, D. G. and Malte, P. C.}, year = {1996}, keywords = {Combustion, Premixed flame, Emissions, Rev'd}, pages = {765--772}, file = {Polifke et al_1996_A NOsubx-sub Prediction Scheme for Lean-Premixed Gas Turbine Combustion.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AU39GIVI\\Polifke et al_1996_A NOsubx-sub Prediction Scheme for Lean-Premixed Gas Turbine Combustion.pdf:application/pdf}, } @inproceedings{SchuePolif99, address = {Indianapolis, IN, USA}, title = {Modeling {Transfer} {Matrices} of {Premixed} {Flames} and {Comparison} {With} {Experimental} {Results}}, volume = {2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations}, isbn = {978-0-7918-7859-0}, doi = {10.1115/99-GT-132}, abstract = {A combined analytical/experimental investigation of the thermoacoustic properties of a gas turbine burner with a premixed, turbulent, swirl-stabilized flame is presented. In an enclosed flame, an interaction occurs between acoustic fluctuations and non-steady heat release, which may lead to thermoacoustic instabilities. This interaction may be characterized by the transfer matrix of the burner with flame. The transfer matrix describes the coupling between fluctuations of acoustic pressure and velocity on both sides of burner and flame, incorporating also the effects of heat release fluctuations on the acoustic quantities. The transfer matrix has been modeled and validated with experimental results. For the burner, an analytical model is proposed, which is based on the Bernoulli equation for instationary flow through compact elements. The model is based on the Rankine-Hugoniot relations across a thin heat source. The fundamental assumption underlying the model is that acoustic fluctuations cause modulations of fuel concentrations at the fuel injector, which result, after a certain time lag, in a fluctuating heat release rate at the flame. The oscillating heat release couples with pressure and velocity fluctuations in the combustion chamber, thereby creating a feedback loop between combustor acoustics and flame dynamics which may result in self-excited combustion instability. The transfer matrix of the burner with flame has been determined experimentally in an atmospheric combustion test facility. The test rig was equipped with loudspeakers and microphones in order to measure the response to an acoustical excitation. Our new flame model shows to be in agreement with the measured results.}, booktitle = {{ASME} 1999 {International} {Gas} {Turbine} and {Aeroengine} {Congress} and {Exhibition}}, publisher = {American Society of Mechanical Engineers}, author = {Schuermans, Bruno and Polifke, Wolfgang and Paschereit, Christian O.}, month = jun, year = {1999}, keywords = {Thermoacoustics, Premixed flame, Rev'd}, pages = {V002T02A024}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\7SXLYCVU\\Schuermans et al. - 1999 - Modeling Transfer Matrices of Premixed Flames and Comparison With Experimental Results.pdf:application/pdf}, } @inproceedings{SchuePolif00, address = {Munich, Germany}, series = {2000-{GT}-0105}, title = {Prediction of {Acoustic} {Pressure} {Spectra} in {Combustion} {Systems} {Using} {Swirl} {Stabilized} {Gas} {Turbine} {Burners}}, isbn = {978-0-7918-7855-2}, url = {https://asmedigitalcollection.asme.org/GT/proceedings/GT2000/78552/Munich,%20Germany/245267}, doi = {10.1115/2000-GT-0105}, abstract = {A method to predict pressure spectra of gas turbine combustion chambers with premixed, turbulent, swirl-stabilized flames is presented. The combustion system is represented as a network of acoustic elements, where each element is characterized by its transfer matrix. Analytic equations can be derived for most of the elements in such a network (e.g. ducts with variable cross-sectional area, sudden area changes etc.). However, the description of the acoustic properties of the burner and flame still require experimental input because of the complex interaction between the turbulent swirling flow, fuel supply and unsteady heat release. Acoustic excitation can be applied up-, and downstream of the burner in order to determine the transfer matrix of burner and flame. Due to the turbulent flow and combustion, the flame itself may also act as an independent source of sound. Thus, the burner does not only transmit and reflect incoming signals, but generates its own signal, independent of the acoustic state upstream and downstream. This quantity, the source-term, has been determined experimentally as well. Having determined the acoustic properties of all the elements (either analytically or by experiment) the thermoacoustic network can be built up. The frequency spectrum of the acoustic oscillations can then be investigated by solving the non-homogeneous system of equations, where the inhomogeneties are due to the source term of the flame. Because of the network approach, the influence of different acoustic boundary conditions on the frequency response has been determined. Application of the method to an atmospheric combustion test-rig with a gas turbine burner showed that the predicted frequency response and stability were in good agreement with experimental data.}, urldate = {2020-05-20}, booktitle = {Volume 2: {Coal}, {Biomass} and {Alternative} {Fuels}; {Combustion} and {Fuels}; {Oil} and {Gas} {Applications}; {Cycle} {Innovations}}, publisher = {American Society of Mechanical Engineers}, author = {Schuermans, Bruno B. H. and Polifke, Wolfgang and Paschereit, Christian Oliver and van der Linden, Jan H.}, month = may, year = {2000}, keywords = {Combustion, Acoustics, Pulsation, Frequency response, Rev'd, transfer kinetics}, pages = {V002T02A025}, file = {Schuermans et al_2000_Prediction of Acoustic Pressure Spectra in Gas Turbines based on Measured.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P4N9VU6J\\Schuermans et al_2000_Prediction of Acoustic Pressure Spectra in Gas Turbines based on Measured.pdf:application/pdf}, } @inproceedings{RamdaHolzi13, address = {Merano, Italy}, title = {Validation of {CFD} {Simulation} of a {Thermoacoustic} {Device}}, booktitle = {{AIA}-{DAGA} 2013 {Conference} on {Acoustics}}, author = {Ramdane, M. Z. Dar and Holzinger, T. and Polifke, W.}, month = mar, year = {2013}, file = {Ramdane et al_2013_Validation of CFD Simulation of a Thermoacoustic Device.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DNEPZTKX\\Ramdane et al_2013_Validation of CFD Simulation of a Thermoacoustic Device.pdf:application/pdf}, } @article{Polif14, series = {Advanced stability analysis for nuclear reactors}, title = {Black-{Box} {System} {Identification} for {Reduced} {Order} {Model} {Construction}}, volume = {67C}, issn = {0306-4549}, url = {http://www.sciencedirect.com/science/article/pii/S0306454913005768}, doi = {10.1016/j.anucene.2013.10.037}, abstract = {For the simulation of multi-physics, multi-scale phenomena, it is often advantageous to build a comprehensive system- or process-model from a collection of sub-models, each of them purposely constructed to describe a certain aspect of the overall problem with high accuracy at low computational cost. Such strategies of divide et impera (“divide and conquer”) integrate modeling approaches of different complexity for different phenomena and scales. Reduced order models (ROMs) identified from time series data can play an important part in such a scheme. The present paper reviews a body of work in aero- and thermo-acoustics, where computational fluid dynamics (CFD) simulation is combined with tools from system identification to characterize the dynamic response of a sub-system (an “element”) to incoming flow perturbations. The element under consideration is treated as a “black box” with a given structure of inputs and outputs. In general, multiple inputs and multiple outputs are present (MIMO model), in the simplest case only a single input and a single output need be considered (SISO structure). Once the response to a broad-band excitation signal is determined by numerical simulation, a ROM representation of the element dynamics can be deduced with system identification. For that purpose, a wide range of methods is available, selection of the most suitable method for a given problem is a non-trivial matter. Selected results obtained with the CFD/SI approach are reviewed, supplemented by best practice recommendations for successful and accurate identification of ROMs from time series data. Perspectives for the use of this method in other fields of science and engineering are developed.}, language = {en}, urldate = {2020-05-30}, journal = {Annals of Nuclear Energy}, author = {Polifke, Wolfgang}, month = may, year = {2014}, keywords = {Thermo-acoustics, Fluid dynamics, Frequency response, Aero- and thermoacoustics, Model reduction, Multi-physics, Multi-scale, System identification}, pages = {109--128}, file = {Polifke_2014_Black-box system identification for reduced order model construction.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TB3CJM69\\Polifke_2014_Black-box system identification for reduced order model construction.pdf:application/pdf}, } @incollection{BurenForne17, title = {Analytical and {Numerical} {Investigation} of the {Damping} {Behavior} of a {Quarter}-{Wave} {Resonator} with {Temperature} {Inhomogeneity}}, booktitle = {Annual {Report}}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Buren, S. van and Förner, K. and Polifke, W.}, editor = {Stemmer, C. and Adams, N. A. and Haidn, O. J. and Radespiel, R. and Sattelmayer, T and Schröder, W. and Weigand, B.}, month = oct, year = {2017}, keywords = {MediaTUM}, pages = {35 -- 47}, file = {Buren et al. - 2017 - Analytical and Numerical Investigation of the Damp.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NQC8DERN\\Buren et al. - 2017 - Analytical and Numerical Investigation of the Damp.pdf:application/pdf}, } @techreport{freitag_konventionen_2006, address = {TU München}, title = {Konventionen für die {Riemann}-{Invarianten} f und g}, author = {Freitag, Ewald and Huber, Andreas}, year = {2006}, file = {Freitag_Huber_2006_Konventionen für die.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JM7B6ETU\\Freitag_Huber_2006_Konventionen für die.pdf:application/pdf}, } @techreport{kaess_tutorial_2006, address = {TU München}, title = {Tutorial {Akustik}: {Rohr} mit {Querschnittssprung}}, author = {Kaess, Roland}, year = {2006}, keywords = {Phasor diagram}, file = {Kaess_2006_Tutorial Akustik.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4SLV24BJ\\Kaess_2006_Tutorial Akustik.pdf:application/pdf}, } @article{MangePolif11, title = {A discrete-time, state-space approach for the investigation of non-normal effects in thermoacoustic systems}, volume = {3}, url = {http://multi-science.metapress.com/index/P7178W6428252111.pdf}, doi = {10.1260/1756-8277.3.4.331}, number = {4}, journal = {Int. J. Spray Comb. Dynamics}, author = {Mangesius, Herbert and Polifke, Wolfgang}, year = {2011}, pages = {331--350}, file = {Mangesius_Polifke_2011_A discrete-time, state-space approach for modelling non-normal effects in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9IAVRPZ9\\Mangesius_Polifke_2011_A discrete-time, state-space approach for modelling non-normal effects in.pdf:application/pdf}, } @phdthesis{TayW12, address = {Munich, Germany}, type = {Ph.{D}. {Thesis}}, title = {Numerical {Simulation} of the {Dynamics} of {Turbulent} {Swirling} {Flames}}, school = {TU München}, author = {Tay Wo Chong Hilares, Luis Roberto}, year = {2012}, file = {tay2012.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZZCBC48W\\tay2012.pdf:application/pdf}, } @article{SovarAureg16, title = {Parametric {LES}/{SI} based aeroacoustic characterization of tandem orifices in low {Mach} number flows}, volume = {102}, url = {http://www.ingentaconnect.com/content/dav/aaua/2016/00000102/00000005/art00004}, doi = {10.3813/AAA.918994}, number = {5}, journal = {Acta Acustica united with Acustica}, author = {Sovardi, Carlo and Aurégan, Yves and Polifke, Wolfgang}, year = {2016}, keywords = {published}, pages = {793--803}, file = {AAA Sovardi et al_2016_Parametric LES-SI based aeroacoustic characterization of tandem orifices in low.pdf:C\:\\Users\\niebl\\Zotero\\storage\\27PXRHQJ\\AAA Sovardi et al_2016_Parametric LES-SI based aeroacoustic characterization of tandem orifices in low.pdf:application/pdf;Sovardi et al. - 2016 - Parametric LESSI based aeroacoustic characterizat.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IN52NVF7\\Sovardi et al. - 2016 - Parametric LESSI based aeroacoustic characterizat.pdf:application/pdf}, } @article{LeeViola16, title = {Acoustical characteristics of two-phase horizontal intermittent flow through an orifice}, volume = {102}, issn = {16101928}, doi = {10.3813/AAA.918995}, number = {5}, journal = {Acta Acustica united with Acustica}, author = {{Lee, J. S.} and {Violato, D} and {Polifke, W}}, year = {2016}, keywords = {published}, pages = {804--812}, file = {2016_Lee, Violato, Polifke_Acoustical characteristics of two-phase horizontal intermittent flow through an orifice.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FK5TPHWB\\2016_Lee, Violato, Polifke_Acoustical characteristics of two-phase horizontal intermittent flow through an orifice.pdf:application/pdf}, } @article{BollwPolif13, title = {Transient two-phase boundary layer modeling for hollow cone sprays}, volume = {52}, doi = {10.1016/j.ijmultiphaseflow.2012.12.011}, journal = {Int. J. of Multiphase Flow}, author = {Bollweg, P. and Polifke, W.}, year = {2013}, keywords = {Fluid Dynamics, multi-phase flow, PhaseTransition}, pages = {1--12}, file = {Bollweg_Polifke_2013_Transient two-phase boundary layer modeling for hollow cone sprays.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D8Z8Q3XA\\Bollweg_Polifke_2013_Transient two-phase boundary layer modeling for hollow cone sprays.pdf:application/pdf;Bollweg_Polifke_2013_Transient two-phase boundary layer modeling for hollow cone sprays.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FIZQX9FP\\Bollweg_Polifke_2013_Transient two-phase boundary layer modeling for hollow cone sprays.pdf:application/pdf}, } @inproceedings{GharaPolif02, address = {Merseburg, Germany}, title = {A {Numerical} {Model} for the {Simulation} of {Dispersed} {Two} {Phase} {Flows} based on {Presumed} {Shape} {Number} {Density} {Functions}}, booktitle = {10th {Workshop} on {Two}-{Phase} {Flow} {Predictions}}, publisher = {ERCOFTAC}, author = {Gharaibah, E. and Polifke, W.}, month = apr, year = {2002}, keywords = {multi-phase flow, Simulation + Modelling, Unrev'd}, file = {Gharaibah_Polifke_2002_A Numerical Model for the Simulation of Dispersed Two Phase Flows based on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BXN6WVFU\\Gharaibah_Polifke_2002_A Numerical Model for the Simulation of Dispersed Two Phase Flows based on.pdf:application/pdf}, } @inproceedings{BrandGhara03, address = {Berlin}, title = {Anzahl- und {Wahrscheinlichkeitsdichtefunktionen} zur {Modellierung} turbulenter {Strömungen} mit {Mischung} oder {Reaktion}}, booktitle = {Arbeitssitzung {GVC} {Fachausschüsse} ''{Mischvorgänge}'' und ''{CFD}''}, publisher = {VDI}, author = {Brandt, M. and Gharaibah, E. and Polifke, W.}, month = mar, year = {2003}, keywords = {multi-phase flow, Simulation + Modelling, GFG}, } @inproceedings{GharaPolif04a, address = {Dresden}, title = {A model for multi-phase flows based on presumed number density functions -- {Implementation} in {CFX} 5.7 and {Validation} against {Vertical} {Pipe} {Flow} {Data}}, booktitle = {{CFX} {User} {Conference}}, author = {Gharaibah, E. and Polifke, W.}, month = apr, year = {2004}, keywords = {multi-phase flow, Simulation + Modelling, GFG}, } @article{Stras05, title = {Gas bubbles as sources of sound in liquids}, volume = {28}, number = {1}, journal = {The Journal of the Acoustical Society of America}, author = {Strasberg, M}, year = {2005}, keywords = {Acoustics, multi-phase flow}, pages = {20--26}, file = {Strasberg_2005_Gas bubbles as sources of sound in liquids.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4CPFMU66\\Strasberg_2005_Gas bubbles as sources of sound in liquids.pdf:application/pdf}, } @article{AchurPolif17, title = {Modulation of {Spray} {Droplet} {Number} {Density} and {Size} {Distribution} by an {Acoustic} {Field}}, volume = {9}, url = {journals.sagepub.com/doi/full/10.1177/1757482X17690751}, doi = {10.1177/1757482X17690751}, number = {1}, journal = {J. of Computational Multiphase Flows}, author = {Achury, J. and Polifke, W.}, year = {2017}, keywords = {MediaTUM}, pages = {32--46}, file = {Achury_Polifke_2017_Modulation of Spray Droplet Number Density and Size Distribution by an Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HHSR4P8P\\Achury_Polifke_2017_Modulation of Spray Droplet Number Density and Size Distribution by an Acoustic.pdf:application/pdf}, } @article{AchurPolif16, title = {Theoretical investigation of the particle response to an acoustic field}, volume = {8}, url = {http://scd.sagepub.com/content/early/2016/04/14/1756827716641118.abstract}, doi = {10.1177/1756827716641118}, abstract = {In this paper, the problem of a particle subjected to an acoustic field is addressed theoretically. Once the fundamental equation of motion is obtained, two nonlinearities are identified: one related to the drag law and one associated with the excitation. In order to face the nonlinearities, two cases are constructed: the first corresponds to the parametric numerical solution of a particle with nonlinear drag in an oscillating flow field (infinite wavelength) and the second refers to the particle submitted to an acoustic standing wave (finite wavelength). For the latter, an approximated analytical solution is formulated. The system is linearized around an equilibrium point and the parameters of the equation are grouped in three nondimensional numbers: the Stokes number (St), the acoustic Mach number (Ma), and the densities ratio (γ). Conditions of parametric resonance in the particle response are deduced for this system by means of the analytical method here proposed, based on Hill’s determinants. Comparison with numerical solutions of the linearized and nonlinearized equations close to an equilibrium point corroborates the analysis for different combinations of parameters.}, number = {4}, journal = {Int. J. Spray Comb. Dynamics}, author = {Achury, Javier and Polifke, Wolfgang}, year = {2016}, pages = {262--270}, file = {Achury_Polifke_2016_Theoretical investigation of the particle response to an acoustic field.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GCNW8IF3\\Achury_Polifke_2016_Theoretical investigation of the particle response to an acoustic field.pdf:application/pdf}, } @inproceedings{PolifWall02, address = {Stanford, USA}, title = {Non-{Reflecting} {Boundary} {Conditions} for {Acoustic} {Transfer} {Matrix} {Estimation} with {LES}}, url = {http://ctr.stanford.edu/ctrsp02/polifke.pdf}, booktitle = {Proceedings of the {Summer} {Program} 2002}, publisher = {Center for Turbulence Research, Stanford University}, author = {Polifke, W. and Wall, C.}, year = {2002}, keywords = {Thermoacoustics, Frequency response, Rev'd, Numerics}, pages = {345--356}, file = {Polifke_Wall_2002_Non-Reflecting Boundary Conditions for Acoustic Transfer Matrix Estimation with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JBQNWBD2\\Polifke_Wall_2002_Non-Reflecting Boundary Conditions for Acoustic Transfer Matrix Estimation with.pdf:application/pdf}, } @inproceedings{KaessPolif07, title = {A {Non} {Reflecting} {Boundary} {Condition} using {Wave} {Masking} and {Characteristics} {Based} {Filtering}}, booktitle = {2nd {GACM} {Colloquim} on {Computational} {Mechanics}}, publisher = {2nd GACM Colloquim on Computational Mechanics, 10.-12. October, Munich, Germany}, author = {Kaess, R. and Polifke, W.}, year = {2007}, keywords = {CFD, LES, Boundary condition, characteristics based filter, non reflecting}, file = {Kaess+Polif07.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M9IFHENQ\\Kaess+Polif07.pdf:application/pdf}, } @inproceedings{KopitBrock05, address = {Lisbon, Portugal}, series = {389}, title = {Characteristics-based filter for identification of acoustic waves in numerical simulation of turbulent compressible flow}, booktitle = {12th {International} {Congress} on {Sound} and {Vibration} ({ICSV12})}, publisher = {IIAV}, author = {Kopitz, J. and Bröcker, E. and Polifke, W.}, month = jul, year = {2005}, note = {tex.owner= sovardi 00004}, keywords = {Acoustics, Turbulence, Simulation + Modelling}, file = {Kopitz et al_2005_Characteristics-based filter for identification of acoustic waves in numerical.pdf:C\:\\Users\\niebl\\Zotero\\storage\\E4FWICI9\\Kopitz et al_2005_Characteristics-based filter for identification of acoustic waves in numerical.pdf:application/pdf}, } @inproceedings{CourtSelle14, address = {Stanford, USA}, title = {Causality and intrinsic thermoacoustic instability modes}, url = {http://ctr.stanford.edu/Summer/SP14/06_Combustion/07_courtine.pdf}, urldate = {2015-01-20}, booktitle = {Proceedings of the 2014 {Summer} {Program}}, publisher = {Center for Turbulence Research, Stanford University}, author = {Courtine, E. and Selle, L. and Nicoud, F. and Polifke, W. and Silva, C. and Bauerheim, M. and Poinsot, T.}, year = {2014}, keywords = {Combustion, Stability, Thermoacoustics, Premixed flame, Frequency response}, pages = {169--178}, file = {Courtine et al_2014_Causality and intrinsic thermoacoustic instability modes.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GGJ7BINM\\Courtine et al_2014_Causality and intrinsic thermoacoustic instability modes.pdf:application/pdf}, } @inproceedings{KaessHuber08, address = {Vancouver, Canada}, series = {{AIAA}-2008-2921}, title = {A time-domain impedance boundary condition for compressible turbulent flows}, url = {http://arc.aiaa.org/doi/pdf/10.2514/6.2008-2921}, doi = {10.2514/6.2008-2921}, booktitle = {14th {AIAA}/{CEAS} {Aeroacoustics} {Conference} (29th {AIAA} {Aeroacoustics} {Conference})}, publisher = {AIAA/CEAS}, author = {Kaess, Roland and Huber, Andreas and Polifke, Wolfgang}, month = may, year = {2008}, file = {Kaess et al_2008_A time-domain impedance boundary condition for compressible turbulent flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KT35W4PE\\Kaess et al_2008_A time-domain impedance boundary condition for compressible turbulent flows.pdf:application/pdf}, } @inproceedings{GhaniHaeri18, address = {Dublin}, title = {{LES} of {Combustion} {Instabilities} in {Annular} {Combustors}}, url = {http://www.combustionsymposia.org/2018/home}, abstract = {Work in Progress Poster (WIPP)}, booktitle = {37th {Int}'l {Symposium} on {Combustion}}, author = {Ghani, Abdulla and Haeringer, Matthias and Polifke, Wolfgang and Worth, Nicholas A. and Dawson, James and Poinsot, Thierry}, month = jul, year = {2018}, keywords = {Poster}, file = {Poster_ISC2018.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PSVHAQES\\Poster_ISC2018.pdf:application/pdf}, } @article{TudisRanja17, title = {Application of the time-domain impedance boundary condition to large-eddy simulation of combustion instability in a shear-coaxial, high pressure combustor}, volume = {99}, url = {http://link.springer.com/article/10.1007/s10494-017-9804-3}, doi = {10.1007/s10494-017-9804-3}, number = {1}, journal = {Flow, Turbulence and Combustion}, author = {Tudisco, P. and Ranjan, R. and Menon, S. and Jaensch, Stefan and Polifke, W.}, year = {2017}, keywords = {MediaTUM, PerRev}, pages = {185--207}, file = {_AAM_Tudisco_TDIBC.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WT3FAZ7H\\_AAM_Tudisco_TDIBC.pdf:application/pdf;Tudisco et al. - 2017 - Application of the time-domain admittance boundary.pdf:C\:\\Users\\niebl\\Zotero\\storage\\63HZ9ATB\\Tudisco et al. - 2017 - Application of the time-domain admittance boundary.pdf:application/pdf}, } @book{JaensPolif16c, title = {{CFD}-basierte, niedrigdimensionale {Modellierung} der nichtlinearen {Dynamik} von {Vormischflammen}}, volume = {FVV-Heft Nr. 1098}, author = {Jaensch, Stefan and Polifke, Wolfgang}, year = {2016}, file = {Jaensch_Polifke_2016_CFD-basierte, niedrigdimensionale Modellierung der nichtlinearen Dynamik von.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EHSTNCIK\\Jaensch_Polifke_2016_CFD-basierte, niedrigdimensionale Modellierung der nichtlinearen Dynamik von.pdf:application/pdf}, } @incollection{Tay-WKaess10, series = {{ISBN} 978-3-642-13871-3}, title = {Identification of {Flame} {Transfer} {Functions} {Using} {LES} of {Turbulent} {Reacting} {Flows}}, isbn = {3-642-13871-3}, booktitle = {High {Performance} {Computing} in {Science} and {Engineering}}, publisher = {Springer}, author = {Tay-Wo-Chong, Luis and Kaess, R. and Komarek, T. and Föller, S. and Polifke, W.}, editor = {Wagner, S. and Steinmetz, M. and Bode, A. and Müller, M.M.}, year = {2010}, pages = {255--266}, annote = {Transactions of the Fourth Joint HLRB and KONWIHR Status, Results and Future Projects Workshop, Leibniz Supercomputing Centre}, file = {Tay-Wo-Chong et al_2010_Identification of Flame Transfer Functions Using LES of Turbulent Reacting Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RDXQ5JGD\\Tay-Wo-Chong et al_2010_Identification of Flame Transfer Functions Using LES of Turbulent Reacting Flows.pdf:application/pdf}, } @inproceedings{KomarTay-W08a, address = {Stuttgart, Germany}, title = {Wechselwirkung von {Streckung}, {Wärmeverlust} und {Reaktionsrate} in nicht-adiabaten {Brennkammern}}, booktitle = {Ercoftac {Technologietag}}, publisher = {ERCOFTAC Pilot Center Germany South}, author = {Komarek, Thomas and Tay-Wo-Chong, Luis and Huber, Andreas and Polifke, Wolfgang}, month = oct, year = {2008}, keywords = {Fluid Dynamics, Turbulence, LES, Mixing}, } @inproceedings{KomarTay-W08b, title = {{GV} 6: {Dynamik} von {Vormischflammen}}, booktitle = {Abschlussbericht {Forschungsinitiative} ''{Kraftwerke} des 21. {Jahrhunderts} ({KW21})''}, author = {Komarek, T. and Tay-Wo-Chong, Luis and Polifke, W.}, editor = {G. Weiß, W. Meier}, year = {2008}, pages = {704--723}, file = {Komarek et al_2008_GV 6.pdf:C\:\\Users\\niebl\\Zotero\\storage\\36AVUATW\\Komarek et al_2008_GV 6.pdf:application/pdf}, } @inproceedings{Tay-WBombe11, address = {Vancouver, Canada}, series = {{GT2011}-46342}, title = {Comparative {Validation} {Study} on {Identification} of {Premixed} {Flame} {Transfer} {Function}}, doi = {10.1115/1.4004183}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2011}, author = {Tay-Wo-Chong, Luis and Bomberg, Sebastian and Ulhaq, Ahtsham and Komarek, Thomas and Polifke, Wolfgang}, year = {2011}, file = {Tay-Wo-Chong et al_2011_Comparative Validation Study on Identification of Premixed Flame Transfer.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F399E3ZE\\Tay-Wo-Chong et al_2011_Comparative Validation Study on Identification of Premixed Flame Transfer.pdf:application/pdf}, } @inproceedings{StrobBombe14, address = {Beijing, China}, title = {On the {Jump} {Conditions} for {Flow} {Perturbations} {Across} a {Moving} {Heat} {Source}}, isbn = {978-1-63439-238-9}, url = {https://mediatum.ub.tum.de/node?id=1231881}, doi = {http://iiav.org/archives_icsv_last/2014_icsv21/content/papers/papers/full_paper_731_20140603233738725.pdf}, urldate = {2015-10-16}, booktitle = {21st {International} {Congress} on {Sound} and {Vibration} ({ICSV21})}, author = {Strobio Chen, L. and Bomberg, S. and Polifke, W.}, month = jul, year = {2014}, keywords = {tango}, file = {Strobio Chen et al_2014_On the Jump Conditions for Flow Perturbations Across a Moving Heat Source.pdf:C\:\\Users\\niebl\\Zotero\\storage\\24FEQN4M\\Strobio Chen et al_2014_On the Jump Conditions for Flow Perturbations Across a Moving Heat Source.pdf:application/pdf}, } @phdthesis{Berts17, type = {Semester {Thesis}}, title = {Evaluation of impedance boundary conditions in {ANSYS} {Fluent}}, abstract = {The application of impedance boundary conditions reduces the computational cost of CFD (computational fluid dynamics) simulations. For example, if one is only interested in combustion stability, it is possible to simulate the combustion chamber only. The remaining parts of the engine up- and downstream of the combustion chamber are modelled by impedance boundary conditions. The aim of this thesis is to evaluate the impedance boundary conditions implemented in ANSYS Fluent. Therefore we investigate the non-reflecting outlet of laminar and turbulent pipe flows. In another setup the influence of non-reflecting wall sections is examined for laminar and turbulent pipe flows. In addition, we prescribe an impedance at the inlet and outlet of laminar and turbulent pipe flows. Finally, we evaluate non-reflecting walls in combustion chambers. Using impedance boundary conditions at inlets or outlets, one can model orifices. Setting the reflection coefficient for acoustic waves by means of imposing an impedance on an in- or outflow boundary is practicable in principle. However, when measuring the flow variables on this boundary, thus determining the actual reflection coefficient, observed and imposed reflection coefficient diverge. In contrast to the imposed reflection coefficient, the boundary shows reflecting behaviour towards low frequencies. This behaviour is observed for laminar and turbulent test cases. The reason is an additional constraint to prevent the mean fields from drifting. Non-reflecting behaviour at low frequencies improves when the characteristic domain length is larger. Another part of this thesis is dedicated to the evaluation of the consequences when im- posing a non-reflecting boundary condition on the walls of the domain, which can be used to model mufflers. When changing the behaviour of a wall section from reflecting to non-reflecting, the magnitude of downstream propagating acoustic waves decreases considerably. Sequential combustors are prone to transverse thermal instabilities, which can be eliminated in a simulation using non-reflecting walls. Therefore we investigate the influence of non-reflecting walls on a stable combustion simulation. Two combustion test cases are used to determine the influence of the acoustic parameters of the combustion chamber wall on the flame. It shows that setting the combustion chamber walls to non-reflecting has only a marginal effect on mean flow fields. The flame position does not change when using non-reflecting walls.}, school = {Technical University of Munich}, author = {Bertsch, Michael}, year = {2017}, annote = {Supervisor: Avdonin}, file = {2017_11_19_presentation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\L4E3AAR6\\2017_11_19_presentation.pdf:application/pdf;Report.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Y85EQCE2\\Report.pdf:application/pdf}, } @mastersthesis{Benaz15, title = {Sensitivity {Analysis} of a {One}-{Dimensional} {Laminar} {Flame}}, school = {Technical University of Munich}, author = {Benaziz, Tarek}, year = {2015}, annote = {Supervisor: Alexander Avdonin}, file = {benaziz.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VZMHFW5U\\benaziz.pdf:application/pdfname}, } @mastersthesis{Bieni17, title = {Comparative {LES} {Study} of {Partially} {Premixed} {Sandia} {Flames} {Based} on {Alternative} {Progress} {Variable} {Definitions} in the {Context} of the {Flamelet}/{Progress} {Variable} {Combustion} {Model}}, school = {Technical University of Munich}, author = {Bieniek, Tobias}, year = {2017}, annote = {Supervisor: Maximilian Hansinger, M.Sc. (UniBW)Alexander Avdonin, M.Sc. (TUM)}, file = {Bieniek - 2017 - Comparative LES Study of Partially Premixed Sandia.pdf:C\:\\Users\\niebl\\Zotero\\storage\\LXPM5QL2\\Bieniek - 2017 - Comparative LES Study of Partially Premixed Sandia.pdf:application/pdf;Bigongiari and Heckl 2018:C\:\\Users\\niebl\\Zotero\\storage\\9Z5QWBIR\\Bigongiari and Heckl 2018.pdf:application/pdf;MA_Bieniek_Presentation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6X2XNN7X\\MA_Bieniek_Presentation.pdf:application/pdf}, } @phdthesis{Avdon11, type = {Bachelor's {Thesis}}, title = {Determination of the {Acoustic} {Power} {Generation} {Potentiality} of {One}-{Dimensional} {Acoustic} {Elements}}, school = {Technical University of Munich}, author = {Avdonin, Alexander}, year = {2011}, annote = {Supervisor: Tobias Holzinger}, file = {1370820.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9UUYQQET\\1370820.pdf:application/pdf}, } @phdthesis{Cesno16, type = {Semester {Thesis}}, title = {Implementation of an uncertainty quantification tool in {MATLAB}}, abstract = {The present work is dedicated to implement an uncertainty quantification tool in MATLAB using the non-intrusive polynomial chaos expansion method and to examine the tool performance with an application test case. Given uniformly or normally distributed uncertain parameters, the tool computes the output quantities of interest. The test case is based on data of a recent scientific paper in the field of uncertainty quantification of thermoacoustic instabilities. The tool results for analytic moments of the uncertain quantities were compared to the results from the paper, where authors were using adjoints and Monte Carlo simulation. It was shown that the outputs of both methods are very comparable, the higher the order - the lower the difference, while the computation time was reduced. The tool results for local sensitivities were verified using the finite difference method. The results were still comparable, however, it was found that increase in polynomial chaos expansion order could lead to higher local fluctuations of the response function (approximation). The reduction of computation time and reliable results show, that the tool can be used instead of Monte Carlos simulation for small numbers of input parameters. Furthermore, this tool is the only choice to conduct an uncertainty quantification study, if a single function evaluation takes a lot of time as in CFD simulation.}, school = {Technical University of Munich}, author = {Češnovar, Matic}, year = {2016}, annote = {Supervisor: Alexander Avdonin}, file = {UQ Tool Cesnovar.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7PM85ZN9\\UQ Tool Cesnovar.pdf:application/pdfname}, } @phdthesis{Gargo17, type = {Bachelor's {Thesis}}, title = {Application of iterative solvers in themoacoustics}, school = {Technical University of Munich}, author = {Gargouri, Fares}, month = nov, year = {2017}, annote = {Supervisor: Avdonin}, file = {Bachelor presentation, Fares Gargouri.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EL9XDJRB\\Bachelor presentation, Fares Gargouri.pdf:application/pdf;Bachelorarbeit-Fares_Gargouri.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P5W3BJXN\\Bachelorarbeit-Fares_Gargouri.pdf:application/pdf}, } @inproceedings{PolifPasch97a, address = {Delft, NL}, series = {1313}, title = {A {Universally} {Applicable} {Stability} {Criterion} for {Complex} {Thermoacoustic} {Systems}}, booktitle = {18. {Deutsch}-{Niederländischer} {Flammentag}, {emVDI} {Bericht}}, publisher = {Verein Deutscher Ingenieure (VDI)}, author = {Polifke, W. and Paschereit, C. O. and Sattelmayer, T.}, year = {1997}, keywords = {Combustion, Thermoacoustics, Simulation + Modelling, transfer function, Unrev'd, pulsations}, pages = {455--460}, annote = {The following values have no corresponding Zotero field:JF - 18. Deutsch-Niederl\{ä\}ndischer Flammentag, \{{\textbackslash}em VDI Bericht\}IS - 1313}, file = {Polifke et al_1997_A Universally Applicable Stability Criterion for Complex Thermoacoustic Systems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T8PUG5KB\\Polifke et al_1997_A Universally Applicable Stability Criterion for Complex Thermoacoustic Systems.pdf:application/pdf}, } @incollection{SovarPolif16a, address = {Rhode-St-Genèse, BE}, series = {{VKI} {Lecture} {Series} 2015}, title = {{CFD}-{Based} {Modelling} of {Sound} {Generation} in {Ducted} {Discontinuities}}, volume = {VKI LS 2016-02}, isbn = {ISBN-13 978-2-87516-098-0}, booktitle = {Progress in simulation, control and reduction of ventilation noise}, publisher = {VKI}, author = {Sovardi, C. and Polifke, W.}, editor = {Schram, C.}, year = {2016}, file = {Sovardi_Polifke_2015_CFD-Based Modelling of Sound Generation in Ducted Discontinuities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D8SFDHRF\\Sovardi_Polifke_2015_CFD-Based Modelling of Sound Generation in Ducted Discontinuities.pdf:application/pdf}, } @phdthesis{Runte14, type = {Semester {Thesis}}, title = {Adjoint sensitivity analysis of a {2D} {FVM} discretized combustor to combustion instabilities}, school = {TU München}, author = {Runte, Thomas}, year = {2014}, note = {Betreuer. Silva}, file = {Runte, T._2014_Adjoint sensitivity analysis of a 2D FVM discretized combustor to combustion.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5U2X6SP2\\Runte, T._2014_Adjoint sensitivity analysis of a 2D FVM discretized combustor to combustion.pdf:application/pdf}, } @inproceedings{AvdonPolif18, address = {Lillestrom, Norway}, series = {{GT2018}-75476}, title = {Quantification of the {Impact} of {Uncertainties} in {Operating} {Conditions} on the {Flame} {Transfer} {Function} with {Non}-{Intrusive} {Polynomial} {Chaos} {Expansion}}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2018: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Avdonin, Alexander and Polifke, Wolfgang}, year = {2018}, keywords = {MediaTUM*, published}, file = {Avdonin_Polifke_2018_Quantification of the Impact of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\APKTVVX8\\Avdonin_Polifke_2018_Quantification of the Impact of.pdf:application/pdf}, } @article{TritsAvdon14, title = {Quantification of initial-data uncertainty on a shock-accelerated gas cylinder}, volume = {26}, issn = {1070-6631}, url = {http://aip.scitation.org/doi/full/10.1063/1.4865756}, doi = {10.1063/1.4865756}, abstract = {We quantify initial-data uncertainties on a shock accelerated heavy-gas cylinder by two-dimensional well-resolved direct numerical simulations. A high-resolution compressible multicomponent flow simulation model is coupled with a polynomial chaos expansion to propagate the initial-data uncertainties to the output quantities of interest. The initial flow configuration follows previous experimental and numerical works of the shock accelerated heavy-gas cylinder. We investigate three main initial-data uncertainties, (i) shock Mach number, (ii) contamination of SF6 with acetone, and (iii) initial deviations of the heavy-gas region from a perfect cylindrical shape. The impact of initial-data uncertainties on the mixing process is examined. The results suggest that the mixing process is highly sensitive to input variations of shock Mach number and acetone contamination. Additionally, our results indicate that the measured shock Mach number in the experiment of Tomkins et al. [“An experimental investigation of mixing mechanisms in shock-accelerated flow,” J. Fluid. Mech. 611, 131 (2008)] and the estimated contamination of the SF6 region with acetone [S. K. Shankar, S. Kawai, and S. K. Lele, “Two-dimensional viscous flow simulation of a shock accelerated heavy gas cylinder,” Phys. Fluids 23, 024102 (2011)] exhibit deviations from those that lead to best agreement between our simulations and the experiment in terms of overall flow evolution.}, number = {2}, urldate = {2017-05-10}, journal = {Physics of Fluids}, author = {Tritschler, V. K. and Avdonin, A. and Hickel, S. and Hu, X. Y. and Adams, N. A.}, month = feb, year = {2014}, pages = {026101}, file = {Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\UWBIKW95\\1.html:text/html;Tritschler et al. - 2014 - Quantification of initial-data uncertainty on a sh.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HU6TVFX9\\Tritschler et al. - 2014 - Quantification of initial-data uncertainty on a sh.pdf:application/pdf}, } @inproceedings{DuranHuber05, address = {Louvain-la-Neuve, Belgium}, title = {Implementation and validation of {LES} models for inhomogeneously premixed turbulent combustion}, booktitle = {European {Combustion} {Meeting} {ECM} 2005}, author = {Durand, L. and Huber, A. and Polifke, W.}, month = apr, year = {2005}, keywords = {Combustion, Optimization}, file = {Durand et al_2005_Implementation and validation of LES models for inhomogeneously premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\C5ZUSSS8\\Durand et al_2005_Implementation and validation of LES models for inhomogeneously premixed.pdf:application/pdf}, } @article{HeinzBrand05, title = {Optimization of global reaction mechanisms for self ignition of hydrocarbon fuels at elevated preheat temperature}, volume = {64}, journal = {ERCOFTAC Bulletin}, author = {Heinz, C and Brandt, M and Polifke, W}, year = {2005}, keywords = {Combustion, Optimization}, pages = {13--18}, file = {Heinz et al_2005_Optimization of Global Reaction Mechanisms for Self-Ignition of Hydrocarbon.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z73XDU6M\\Heinz et al_2005_Optimization of Global Reaction Mechanisms for Self-Ignition of Hydrocarbon.pdf:application/pdf}, } @incollection{FornePolif14, title = {Aero-{Acoustic} {Characterization} of a {Helmholtz} {Resonator} in the {Linear} {Regime} with {System} {Identification}}, url = {http://www.sfbtr40.de/fileadmin/Annual-Reports/annualreport2014/a3-2014.pdf}, booktitle = {Annual {Report}}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Förner, K. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2014}, keywords = {MediaTUM}, pages = {33 -- 45}, file = {Förner and Polifke - 2014 - Aero-Acoustic Characterization of a Helmholtz Reso.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RHKP2J5B\\Förner and Polifke - 2014 - Aero-Acoustic Characterization of a Helmholtz Reso.pdf:application/pdf}, } @incollection{ForneCarde13, title = {Mapping the {Influence} of {Acoustic} {Resonators} on {Rocket} {Engine} {Combustion} {Stability}}, url = {http://www.sfbtr40.de/fileadmin/Annual-Reports/annualreport2013/a3-2013.pdf}, booktitle = {Annual {Report}}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Förner, K. and Cárdenas Miranda, A. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2013}, keywords = {MediaTUM}, pages = {33 -- 45}, file = {Förner et al. - 2013 - Mapping the Influence of Acoustic Resonators on Ro.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VVTIMFEN\\Förner et al. - 2013 - Mapping the Influence of Acoustic Resonators on Ro.pdf:application/pdf}, } @inproceedings{Polif11b, address = {Munich, Germany}, title = {A frequency-domain model of thermo acoustic limit cycles with modal coupling}, url = {www.slideshare.net/Polifke/iitm10key}, booktitle = {Workshop ''{Nonlinear} {Thermo} {Acoustics} and {Active} {Instability} {Control} ''}, publisher = {ifTA GmbH / LIMOUSINE}, author = {Polifke, W.}, month = mar, year = {2011}, } @phdthesis{Miron17, title = {Optimization of an {Integral} {Lobed} {Mixer} {Configuration}}, school = {Technischen Universität München}, author = {Mironov}, year = {2017}, keywords = {Supervisor: Merk}, file = {Mironov - 2017 - Optimization of an Integral Lobed Mixer Configurat.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JUCVVSIT\\Mironov - 2017 - Optimization of an Integral Lobed Mixer Configurat.pdf:application/pdf}, } @phdthesis{Fritz16, title = {Numerische {Untersuchung} des thermoakustischen {Verhaltens} eines turbulenten {Verbrennungs}-{Prüfstandes} basierend auf linearisierten {Feldern}}, school = {Technischen Universität München}, author = {Fritz, Fabian}, year = {2016}, keywords = {Supervisor: Merk}, file = {Fritz - 2016 - Numerische Untersuchung des thermoakustischen Verh.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KHRWRK9R\\Fritz - 2016 - Numerische Untersuchung des thermoakustischen Verh.pdf:application/pdf}, } @phdthesis{Han16, type = {Bachelor's {Thesis}}, title = {Entwicklung und {Konstruktion} eines {Impingement}-{Effusionskühleinsatzes} für den geschlossenen thermischen {Windkanal}}, school = {Technischen Universität München}, author = {Han, Y.}, year = {2016}, keywords = {Supervisor: Merk}, file = {Han, Y. - 2016 - Entwicklung und Konstruktion eines Impingement-Eff.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4RKUB3I9\\Han, Y. - 2016 - Entwicklung und Konstruktion eines Impingement-Eff.pdf:application/pdf}, } @mastersthesis{Schmi16, title = {Numerical investigation of turbulent mixing in the flow emanating from effusion cooling holes}, school = {Technischen Universität München}, author = {Schmid}, year = {2016}, keywords = {Supervisor: Merk}, file = {Schmid - 2016 - Numerical investigation of turbulent mixing in the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WQD9T78K\\Schmid - 2016 - Numerical investigation of turbulent mixing in the.pdf:application/pdf}, } @phdthesis{Saraj16, type = {Bachelor's {Thesis}}, title = {Efficient simulation of conjugate heat transfer based on state-space models}, school = {TUM}, author = {Sarajlic, Nadin}, month = jul, year = {2016}, note = {Supervisor: Meindl}, file = {Sarajlic - 2016 - Efficient simulation of conjugate heat transfer ba.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XMWU6FE8\\Sarajlic - 2016 - Efficient simulation of conjugate heat transfer ba.pdf:application/pdf}, } @phdthesis{Hofme16, type = {Semester {Thesis}}, title = {Investigation of uniform heat flux thermal boundary conditions for local heat transfer measurements}, language = {Englisch}, school = {TUM}, author = {Hofmeister, Thomas}, month = jul, year = {2016}, note = {Supervisor: Meindl}, file = {Hofmeister - 2016 - Investigation of uniform heat flux thermal boundar.pdf:C\:\\Users\\niebl\\Zotero\\storage\\856ETZTU\\Hofmeister - 2016 - Investigation of uniform heat flux thermal boundar.pdf:application/pdf}, } @mastersthesis{Tayya16, address = {Garching, Germany}, title = {Acoustic {Characterization} of {Swirl} {Generators}}, language = {English}, school = {Technische Universität München}, author = {Tayyab, M.}, year = {2016}, file = {Tayyab - 2016 - Acoustic Characterization of Swirl Generators.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MN5VIZTX\\Tayyab - 2016 - Acoustic Characterization of Swirl Generators.pdf:application/pdf}, } @phdthesis{Tahir15, address = {Garching}, type = {Semester {Thesis}}, title = {Numerical simulation and experimentation of woven wire gas to liquid heat exchangers}, language = {English}, school = {Technische Universität München}, author = {Tahir, Ahmed}, year = {2015}, note = {Betreuer. Silva}, file = {Tahir_2015.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6FQTNXQV\\Tahir_2015.pdf:application/pdf}, } @phdthesis{Palac16, address = {Garching}, type = {Semester {Thesis}}, title = {Development of a unsteady stream function - vorticity solver based on the finite volume method for modeling of a flow with flame transition}, language = {English}, school = {Technische Universität München}, author = {Palacio, Arturo}, year = {2016}, note = {Betreuer. Silva}, file = {Palacio_2016.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ILC8WM2X\\Palacio_2016.pdf:application/pdf}, } @mastersthesis{Lang15, address = {Garching}, title = {Development of a stream function - vorticity flow solver based on the finite volume method for modeling a laminar premixed flame}, language = {English}, school = {Technische Universität München}, author = {Lang, Christian}, year = {2015}, note = {Betreuer. Silva}, file = {Lang_2015.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2LDVQ9D3\\Lang_2015.pdf:application/pdf}, } @phdthesis{Bezgi17, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Investigation of {Swirl} {Flames} {Using} {Linearized} {Navier}-{Stokes} {Equations}}, language = {English}, school = {Technische Universität München}, author = {Bezgin, D. A.}, year = {2017}, file = {Bezgin - 2017 - Investigation of Swirl Flames Using Linearized Nav.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5WXDTL8X\\Bezgin - 2017 - Investigation of Swirl Flames Using Linearized Nav.pdf:application/pdf}, } @techreport{FolleGente09, title = {Wiener-{Hopf}-{Inverter} ({WHI}) - {A} {Correlation} {Based} {Signal} {Analysis} {Tool} for {Single}-{Input}, {Single}-{Output} ({SISO}) and {Multiple}-{Input}, {Multiple}-{Output} ({MIMO}) {Systems}}, institution = {TU München}, author = {Föller, Stephan and Gentemann, A. M. G. and Komarek, Thomas and Polifke, Wolfgang}, year = {2009}, file = {Föller et al_2009_Wiener-Hopf-Inverter (WHI) - A.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3T96PMBR\\Föller et al_2009_Wiener-Hopf-Inverter (WHI) - A.pdf:application/pdf}, } @inproceedings{BrandPolif02c, address = {Darmstadt}, title = {Statistical {Description} of {Mixing} {Processes} to {Calculate} {Mean} {Reaction} {Rates} {Using} a {Monte} {Carlo} {Method}}, booktitle = {1st ({International}) {SFB} 568 {Workshop}}, author = {Brandt, M. and Polifke, W.}, year = {2002}, keywords = {Combustion, Turbulence, chemistry}, } @inproceedings{PoliffurT13, address = {Toulouse, France}, title = {Tackling {Combustor} {Design} {Problems} with {Large} {Eddy} {Simulation} of {Reacting} {Flows}}, urldate = {2015-02-17}, booktitle = {{MUSAF} {II} {Colloquium}}, publisher = {CERFACS}, author = {Polifke, Wolfgang and für Thermodynamik, Fachgebiet}, month = sep, year = {2013}, file = {Polifke_2013_Tackling Combustor Design Problems with Large Eddy Simulation of Reacting Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6D2NDHWT\\Polifke_2013_Tackling Combustor Design Problems with Large Eddy Simulation of Reacting Flows.pdf:application/pdf}, } @inproceedings{KulkaPolif13, address = {Bad Reichenhall, Germany}, title = {Large {Eddy} {Simulation} of auto-ignition using progress variable approach}, booktitle = {{EFMC}-8 (8th {European} {Fluid} {Mechanics} {Conference})}, author = {Kulkarni, Rohit and Polifke, Wolfgang}, month = sep, year = {2010}, } @misc{Polif16c, title = {Computational {Thermo}-{Fluid} {Dynamics} with {Open} {Source} {Tools}}, author = {Polifke, Wolfgang}, year = {2016}, note = {Citation Key: Polif16c}, file = {OpenFOAM_Praktikum.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NZXKIFTH\\OpenFOAM_Praktikum.pdf:application/pdf}, } @inproceedings{PaschPolif96, address = {Keele, UK}, series = {Euromech {Colloquium} 352,{Mean} {Flow} {Effects} in {Acoustics}}, title = {Some {Effects} of {Mean} {Flow} on {Thermoacoustic} {Oscillations} in {Gas} {Turbines}}, booktitle = {Euromech {Colloquium} 352, {Mean} {Flow} {Effects} in {Acoustics}}, author = {Paschereit, C. O. and Polifke, W.}, year = {1996}, keywords = {Thermoacoustics, Simulation + Modelling, Unrev'd}, annote = {The following values have no corresponding Zotero field:CY - Keele, UK}, } @inproceedings{Polif95, address = {RWTH Aachen, Germany}, title = {Fundamental and {Practical} {Limitations} of {NOx} {Reduction} in {Lean}-{Premixed} {Combustion}}, booktitle = {Euroconference ''{Premixed} {Turbulent} {Combustion}: {Introduction} to the {State} of the {Art}''}, author = {Polifke, W.}, month = jun, year = {1995}, keywords = {Combustion, Emissions, Simulation + Modelling, Invt'd}, file = {Polifke_1995_Fundamental and Practical Limitations of NOx Reduction in Lean-Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5J757B39\\Polifke_1995_Fundamental and Practical Limitations of NOx Reduction in Lean-Premixed.pdf:application/pdf}, } @inproceedings{DuranPolif07, address = {Berlin}, title = {Development and validation of an {LES} model for turbulent premixed combustion}, booktitle = {23. {Deutscher} {Flammentag}}, author = {Durand, L. and Polifke, W. and Griebel, P. and Siewert, P.}, month = sep, year = {2007}, file = {Durand et al_2007_Development and validation of an LES model for turbulent premixed combustion.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UTU3DR5X\\Durand et al_2007_Development and validation of an LES model for turbulent premixed combustion.pdf:application/pdf}, } @article{SelimSujit11, title = {Identification of heat transfer dynamics for non-modal analysis of thermoacoustic stability}, volume = {217}, issn = {0096-3003}, doi = {DOI: 10.1016/j.amc.2010.07.051}, journal = {Applied Mathematics and Computation}, author = {Selimefendigil, F. and Sujith, R. I. and Polifke, W.}, year = {2011}, keywords = {Identification, System, linear}, pages = {5134--5150}, file = {Selimefendigil et al_2011_Identification of heat transfer dynamics for non-modal analysis of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GCQITMFX\\Selimefendigil et al_2011_Identification of heat transfer dynamics for non-modal analysis of.pdf:application/pdf}, } @inproceedings{GenteCaton01a, title = {Selective {Non}-{Catalytic} {Removal} ({SNCR}) of {Nitrogen} {Dioxides} ({NO2}) {Using} {Ammonia}}, author = {Gentemann, A M G and Caton, J A}, year = {2001}, pages = {1--12}, annote = {The following values have no corresponding Zotero field:JF - 2nd Joint Meeting of the United States Sections of the Combustion InstituteCY - Oakland, CA, USA}, } @inproceedings{AlbayUlhaq13, address = {Beijing, China}, title = {Analytical {Derivation} of {Laminar} {Premixed} {Flame} {Impulse} {Response} to {Equivalence} {Ratio} {Perturbations}}, url = {http://www.w.iiav.org/archives_icsv_last/2014_icsv21/content/papers/papers/full_paper_384_20140529042619911.pdf}, booktitle = {21st {International} {Congress} on {Sound} and {Vibration} ({ICSV21})}, author = {Albayrak, Alp and Ulhaq, Ahtsham and Blumenthal, Ralf S. and Polifke, Wolfgang}, month = jul, year = {2014}, keywords = {MediaTUM}, file = {Albayrak et al_2014_Analytical derivation of laminar premixed flame impulse response to equivalence.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TWDCBWMC\\Albayrak et al_2014_Analytical derivation of laminar premixed flame impulse response to equivalence.pdf:application/pdf}, } @phdthesis{Brand14, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Grid {Independence} {Study} of two-dimensional, laminar, pulsating {Cross}-{Flow} around a circular {Cylinder}}, school = {Technische Universität München}, author = {Brandl, Patrick}, month = jul, year = {2014}, note = {Betreuer: Witte}, file = {Brandl - 2014 - Grid Independence Study of two-dimensional, lamina.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J3TEG8KU\\Brandl - 2014 - Grid Independence Study of two-dimensional, lamina.pdf:application/pdf}, } @inproceedings{HanafAtta18, address = {Alexandria, Egypt}, title = {Simplified lumped model for solid oxide fuel cells}, booktitle = {8th {Arab} {Conference} on {Materials} {Science}, ''{Materials} for {Energy} {Application}''}, author = {Hanafil, A. and Atta, E. H. and Polifke, W. and El-Sayed, M.}, month = apr, year = {2004}, keywords = {Simulation + Modelling, thermodynamics}, annote = {Cairo University}, file = {Hanafil et al_2004_Simplified lumped model for solid oxide fuel cells.pdf:C\:\\Users\\niebl\\Zotero\\storage\\52F7SGPC\\Hanafil et al_2004_Simplified lumped model for solid oxide fuel cells.pdf:application/pdf}, } @article{HolziEmmer14, title = {Optimizing thermoacoustic regenerators for maximum amplification of acoustic power}, volume = {136}, issn = {0001-4966}, url = {http://scitation.aip.org/content/asa/journal/jasa/136/5/10.1121/1.4896499}, doi = {10.1121/1.4896499}, abstract = {Identifying optimum design parameters and operating conditions of thermoacoustic engines or refrigerators is crucial for the further development of such devices. This publication proposes an optimization criterion for the stack of a thermoacoustic device with the objective of maximizing the amplification of acoustic energy by the stack. For this purpose, the stack is described as an acoustic multi-port, represented mathematically by its scattering matrix. It is shown how the scattering matrix may be deduced from the standard thermo-acoustic governing equations. Then an acoustic power balance is deduced from the scattering matrix. The spectral norm and the eigenvectors of the scattering matrix identify optimal acoustic states. Stack design operating parameters and frequencies with maximum amplification of acoustic power are identified for various stack configurations. The corresponding acoustic states are interpreted physically.}, number = {5}, urldate = {2014-11-10}, journal = {The Journal of the Acoustical Society of America}, author = {Holzinger, Tobias and Emmert, Thomas and Polifke, Wolfgang}, month = nov, year = {2014}, keywords = {Thermoacoustics, Eigenvalues, Acoustical properties, Acoustic modeling, Acoustic scattering}, pages = {2432--2440}, file = {Holzinger et al_2014_Optimizing thermoacoustic regenerators for maximum amplification of acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SEWS6I2F\\Holzinger et al_2014_Optimizing thermoacoustic regenerators for maximum amplification of acoustic.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\AQWDRNRU\\1.html:text/html}, } @article{AchurPolif16b, title = {Theoretical {Approach} for the {Agglomeration} of {Disperse} {Flows} by {Sound} {Waves} and {Oscillating} {Flows}}, journal = {submitted to Journal of Aerosol Science}, author = {Achury, J. and Polifke, W.}, year = {2016}, keywords = {work-in-progress}, file = {AchurPolif16b.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4QAZW4D2\\AchurPolif16b.pdf:application/pdf}, } @inproceedings{PolifCoklj98, address = {York, UK}, series = {7th {Int}'l {Conf}. on {Numerical} {Combustion}}, title = {A {Non}-{Adiabatic} {Method} for {Calculation} of {Premixed} {Flames} using {Turbulent} {Flame} {Speed} {Closure}}, url = {http://www.maths.manchester.ac.uk/~jwd/ICNC7}, booktitle = {7th {Int}. {Conference} on {Numerical} {Combustion}}, author = {Polifke, W and Cokljat, D and Wild, P}, year = {1998}, keywords = {Unrev'd}, annote = {The following values have no corresponding Zotero field:CY - York, UK}, } @inproceedings{Polif06c, address = {Stuttgart, Germany}, title = {Novel {Approach} for {Efficient} {Modelling} of {Mixing} and {Reaction} in {Turbulent} {Flow} {Based} on {Discrete} {Distributions}}, booktitle = {Technologietag {ERCOFTAC} {Süddeutschland}}, author = {Polifke, W.}, month = sep, year = {2006}, } @article{Polif91, series = {1}, title = {The {Statistics} of {Helicity} {Fluctuations} in {Homogeneous} {Turbulence}}, volume = {3}, doi = {10.1063/1.857871}, journal = {Phys. of Fluids A}, author = {Polifke, W}, year = {1991}, keywords = {Turbulence, Rev'd, Helicity}, pages = {115--129}, file = {Polifke_1991_The Statistics of Helicity Fluctuations in Homogeneous Turbulence.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HD4TSQGS\\Polifke_1991_The Statistics of Helicity Fluctuations in Homogeneous Turbulence.pdf:application/pdf}, } @inproceedings{Polif10a, address = {Stockholm, Sweden}, title = {Thermoacoustic instabilities of confined flames}, booktitle = {Summer {School} in {Aeroacoustics} in {Low} {Mach} {Number} {Confined} {Flows}}, publisher = {FLOW Center at KTH}, author = {Polifke, W.}, month = jun, year = {2010}, } @inproceedings{Polif12d, title = {Non-normality and nonlinearity in stability analysis}, booktitle = {Dresden {Scientific} {Workshop} {On} {Reactor} {Dynamics} {And} {Safety}}, author = {Polifke, W.}, month = sep, year = {2012}, } @article{DemsCarne12, series = {2/3}, title = {Large {Eddy} {Simulation} of a particle-laden swirling flow with a presumed function method of moments}, volume = {12}, doi = {10.1504/PCFD.2012.047452}, journal = {Progress Comp. Fluid Dyn.}, author = {Dems, P. and Carneiro, J. and Polifke, W.}, month = jun, year = {2012}, pages = {92--102}, file = {Dems et al_2012_Large Eddy Simulation of a particle-laden swirling flow with a presumed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GRW55SP8\\Dems et al_2012_Large Eddy Simulation of a particle-laden swirling flow with a presumed.pdf:application/pdf}, } @techreport{Fiala09, address = {TU München}, title = {Overview over different damping models}, institution = {Thermodynamik}, author = {Fiala, Thomas}, year = {2009}, file = {Fiala_2009_Overview over different damping models.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TAMV3GJI\\Fiala_2009_Overview over different damping models.pdf:application/pdf}, } @article{KulkaZellh13a, title = {A {Model} for {Auto}-{Ignition} and {Heat} {Release} in {Turbulent} {Flows} and its {Application} to {Thermoacoustic} {Analysis}}, volume = {96}, journal = {Ercoftac Bulletin}, author = {Kulkarni, R. and Zellhuber, M. and Polifke, W.}, month = sep, year = {2013}, keywords = {Combustion, Turbulence}, pages = {29--34}, file = {Kulkarni et al_2013_A Model for Auto-Ignition and Heat Release in Turbulent Flows and its.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2586WXNH\\Kulkarni et al_2013_A Model for Auto-Ignition and Heat Release in Turbulent Flows and its.pdf:application/pdf}, } @inproceedings{AchurPolif15, address = {Halle, Germany}, title = {Theoretical {Investigation} of the {Particle} {Response} to an {Acoustic} {Field}}, abstract = {In this work, the response of a particle submitted to an acoustic field is assessed theoretically. This response is of primary interest in technologies that use forced fields to agglomerate particulate material. Once the particle equation of motion is obtained two non-linearities are identified: the first one related to Schiller and Naumann extension for the drag coefficient and the other one associated with the velocity field excitation. The source of particle excitation, the acoustic wave, is modeled as an oscillating flow with infinite wavelength (Suijth et al. 1999) and as a velocity standing wave with finite wavelength. We focus on the non-linearity present in the finite wavelength case, where an approximated analytical solution is formulated as follows. The equation is linearized around an equilibrium point, which is a standing wave velocity node, and the parameters of the equation: frequency ω, wavelength λ, amplitude of the acoustic velocity uc, particle and fluid densities ρp and ρc, particle diameter D and fluid kinematic viscosity νc, are grouped in three dimensionless numbers: the ratio of densities (γ=ρp/ρc), the Stokes number (St=ωγD2 /36πνc) and the acoustic displacement (∆=2πuc/λω). Consequently, the linearized governing equation can be written as, (1) where the term f(t)=∆/2πSt sin(ωt) can be seen as a periodically modulated spring coefficient if the analogy with an harmonic oscillator is made. Conditions of parametric resonance in the particle response are deduced for Eq. (1) by means of the analytical method proposed, which is based on a presumed solution of Eq. (1) in the form of a complex Fourier series. The Hill’s determinant (Jordan, 2007), derived from the complex Fourier series, predicts the existence and type of solution. A principal stability map as function of the equation parameters is constructed, as illustrated in Fig. 1, which determines the combination of St and ∆ leading to stable, periodic and resonant particle responses. Additionally, particular phenomena of the parametric system (1), like parametric regeneration and the reason why the response is dominated by the first sub-harmonic (Butikov, 2004), are also discussed. Comparison of the numerical solutions for the linearized and non-linearized models close to an equilibrium point corroborates the analysis for different combinations of parameters.}, booktitle = {14th {Workshop} on {Two}-{Phase} {Flow} {Predictions}}, author = {Achury, J. and Polifke, W.}, month = sep, year = {2015}, file = {Achury_Polifke_2015_Theoretical Investigation of the Particle Response to an Acoustic Field.pdf:C\:\\Users\\niebl\\Zotero\\storage\\78BRA8ZV\\Achury_Polifke_2015_Theoretical Investigation of the Particle Response to an Acoustic Field.pdf:application/pdf}, } @article{AchurDuque10, title = {Two-dimensional simulation of an unstable combustion system}, volume = {18}, number = {1}, journal = {Chilean Journal of Engineering - INGENIARE}, author = {Achury, J. and Duque, C. and Galeano, C.}, year = {2010}, pages = {205--119}, } @inproceedings{CardePolif12, address = {Malta}, title = {Enhanced {Heat} {Transfer} in {Laminar} {Pulsating} {Flow} {Past} a {Flat} {Plate}}, booktitle = {''9th {International} {Conference} on {Heat} {Transfer}, {Fluid} {Mechanics} and {Thermodynamics} ({HEFAT2012})''}, author = {Cárdenas Miranda, A. and Polifke, W.}, month = jul, year = {2012}, file = {Miranda_Polifke_2012_Enhanced Heat Transfer in Laminar Pulsating Flow Past a Flat Plate.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4BQ78399\\Miranda_Polifke_2012_Enhanced Heat Transfer in Laminar Pulsating Flow Past a Flat Plate.pdf:application/pdf}, } @inproceedings{SovarPolif13, address = {München / Ottobrunn}, title = {Identification of {Sound} sources in internal non-reactive turbulent flows}, booktitle = {{DGLR}/{DEGA} {X}-{Noise} {Workshop} {Strömungsakustik}}, publisher = {DGLR / DEGA / X-Noise-Netzwerk}, author = {Sovardi, Carlo and Polifke, Wolfgang}, month = nov, year = {2013}, } @inproceedings{FolleKaess08, address = {Garching, Germany}, title = {Determination of acoustic transfer behavior via {Large}-{Eddy}-{Simulation} and {System} {Identification}}, booktitle = {Linux {Cluster} {Workshop} 2008}, publisher = {Leibnitz-Rechenzentrum der Bayerischen Akademie de}, author = {Föller, S. and Kaess, R. and Polifke, W.}, year = {2008}, } @article{PaggiBenar10, series = {2}, title = {Cryo-adsorptive hydrogen storage on activated carbon. {I}: {Thermodynamic} analysis of adsorption vessels and comparison with liquid and compressed gas hydrogen storage}, volume = {35}, journal = {International Journal of Hydrogen Energy}, author = {Paggiaro, R. and Bénard, P. and Polifke, W.}, year = {2010}, keywords = {Simulation + Modelling, thermodynamics, Ad-Ab-De-Sorption}, pages = {638--647}, file = {Paggiaro et al_2010_Cryo-adsorptive hydrogen storage on activated carbon.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z8PRVKTC\\Paggiaro et al_2010_Cryo-adsorptive hydrogen storage on activated carbon.pdf:application/pdf}, } @inproceedings{PolifFlohr00, address = {Munich, Germany}, series = {{ASME} 2000-{GT}-135}, title = {Modeling of {Inhomogeneously} {Premixed} {Combustion} with an {Extended} {TFC} {Model}}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, publisher = {ASME}, author = {Polifke, W. and Flohr, P. and Brandt, M.}, year = {2000}, keywords = {Combustion, Turbulence, Rev'd}, file = {Polifke et al_2000_Modeling of Inhomogeneously Premixed Combustion with an Extended TFC Model.pdf:C\:\\Users\\niebl\\Zotero\\storage\\86PF5CXP\\Polifke et al_2000_Modeling of Inhomogeneously Premixed Combustion with an Extended TFC Model.pdf:application/pdf}, } @inproceedings{KopitPolif05a, address = {Lisbon, Portugal}, title = {Stability {Analysis} of {Thermoacoustic} {Systems} by {Determination} of the {Open}-{Loop}-{Gain}}, booktitle = {12th {Int}. {Congress} on {Sound} and {Vibration} ({ICSV12})}, publisher = {IIAV}, author = {Kopitz, J. and Polifke, W.}, month = jul, year = {2005}, keywords = {Acoustics, Turbulence, Simulation + Modelling}, file = {Kopitz_Polifke_2005_Stability Analysis of Thermoacoustic Systems by Determination of the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MJ6KZNEU\\Kopitz_Polifke_2005_Stability Analysis of Thermoacoustic Systems by Determination of the.pdf:application/pdf}, } @inproceedings{KulkaPolif16, address = {Tenerife, Spain}, title = {{LES} of {Hydrogen} {Auto}-ignition in non-premixed case using {Progress} {Variable} {Approach}}, booktitle = {{SPEIC10} - {Towards} {Sustainable} {Combustion}}, author = {Kulkarni, Rohit and Polifke, Wolfgang}, month = jun, year = {2010}, file = {Kulkarni_Polifke_2010_LES of Hydrogen Auto-ignition in non-premixed case using Progress Variable.pdf:C\:\\Users\\niebl\\Zotero\\storage\\X2CP2J8K\\Kulkarni_Polifke_2010_LES of Hydrogen Auto-ignition in non-premixed case using Progress Variable.pdf:application/pdf}, } @inproceedings{HassaSpinn14, title = {Thermodynamic analysis of heat and mass transport phenomina in phase change regenerators with conductive packing}, booktitle = {Qatar {Foundation} {Annual} {Research} {Conference}}, author = {Hassabou, A. H. and Spinnler, M. and Polifke, W.}, year = {2014}, } @inproceedings{PankiEvesq01, address = {Stuttgart}, title = {Stability {Analysis} of {Annular} {Gas} {Turbine} {Combustors}}, booktitle = {{LECT} {Workshop} on {Instabilities} in {Aero}-{Engine} {Combustors}}, author = {Pankiewitz, C and Evesque, S and Polifke, W and Sattelmayer, T}, month = dec, year = {2001}, keywords = {Stability, Thermoacoustics, Premixed flame, Simulation + Modelling, Unrev'd}, file = {Pankiewitz et al_2001_Stability Analysis of Annular Gas Turbine Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2MTJTV3N\\Pankiewitz et al_2001_Stability Analysis of Annular Gas Turbine Combustors.pdf:application/pdf}, } @article{EvesqAnnas03, title = {Adaptive control of a class of time-delay systems}, volume = {125}, number = {2}, journal = {ASME Transactions on Dynamics, Systems, Meas.{\textbackslash}\&Cont}, author = {Evesque, S and Annaswamy, A M and Niculescu, S and Dowling, A P}, year = {2003}, pages = {186--193}, } @inproceedings{BrandPolif04, address = {Istanbul, Turkey}, title = {Monte-{Carlo} methods for tabulation of mean reaction rates from joint probability distributions in turbulent flow}, url = {www.akis.itu.edu.tr/CDRF2004}, booktitle = {Chemical {Kinetics} \& {Diffusion} {Processes} in {Reactive} {Flows}}, author = {Brandt, M. and Polifke, W.}, month = jun, year = {2004}, keywords = {Turbulence}, pages = {17--19}, annote = {The following values have no corresponding Zotero field:JF - Chemical Kinetics {\textbackslash}\& Diffusion Processes in Reactive FlowsCY - Istanbul}, file = {Brandt_Polifke_2004_Monte-Carlo methods for tabulation of mean reaction rates from joint.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6JDNQ45X\\Brandt_Polifke_2004_Monte-Carlo methods for tabulation of mean reaction rates from joint.pdf:application/pdf}, } @inproceedings{PolifPonce98, address = {York, UK}, title = {Determination of (thermo-) acoustic transfer matrices by time-dependent numerical simulation}, booktitle = {7th {Int}. {Conference} on {Numerical} {Combustion}}, author = {Polifke, W and Poncet, A and Paschereit, C O and Döbbeling, K}, year = {1998}, keywords = {Simulation + Modelling, Frequency response, Unrev'd}, file = {Polifke et al_1998_Determination of thermo-acoustic Transfer Matrices by time-dependent numerical.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MNKC3I7I\\Polifke et al_1998_Determination of thermo-acoustic Transfer Matrices by time-dependent numerical.pdf:application/pdf}, } @article{Polif12, series = {3}, title = {Editorial note to {Professor} {Culick}’s review}, volume = {4}, journal = {Int. J. Spray Comb. Dynamics}, author = {Polifke, W.}, year = {2012}, file = {Polifke_2012_Editorial note to Professor Culick’s review.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SFVSR2PZ\\Polifke_2012_Editorial note to Professor Culick’s review.pdf:application/pdf}, } @phdthesis{Bollw12, type = {{PhD} {Thesis}}, title = {Hollow cone spray characterization and integral modeling}, school = {TU München}, author = {Bollweg, P.}, year = {2012}, file = {Bollweg_2012_Hollow cone spray characterization and integral modeling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\54ZNUW36\\Bollweg_2012_Hollow cone spray characterization and integral modeling.pdf:application/pdf}, } @inproceedings{PolifBette97, address = {RWTH Aachen, Germany}, title = {Problems and {Progress} in {Combustion} {Modelling} for {Gas} {Turbine} {Applications}}, booktitle = {{ERCOFTAC} {Summer} {School} on {Turbulent} {Combustion}: {Modelling} and {Diagnostics}}, publisher = {ERCOFTAC}, author = {Polifke, W. and Bettelini, M. and Geng, W. and Lloyd, J. and Döbbeling, K.}, year = {1997}, keywords = {Invt'd}, annote = {The following values have no corresponding Zotero field:CY - RWTH Aachen}, } @inproceedings{MarscHinri09, address = {Fulda, Germany}, title = {Numerische {Simulation} thermo-fluiddynamischer {Phänomene} an {Phasengrenzflächen} in {Gas}-{Flüssig}-{Strömungen} mit {OpenFOAM}}, booktitle = {{ProcessNet} {Jahrestreffen} der {Fachausschüsse} {Computational} {Fluid} {Dynamics}, {Mischvorgänge} und {Extraktion}}, publisher = {DECHEMA}, author = {Marschall, H. and Hinrichsen, O. and Labonte, C. and Polifke, W.}, month = mar, year = {2009}, file = {Marschall et al_2009_Numerische Simulation thermo-fluiddynamischer Phänomene an Phasengrenzflächen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6VIMAXQK\\Marschall et al_2009_Numerische Simulation thermo-fluiddynamischer Phänomene an Phasengrenzflächen.pdf:application/pdf}, } @article{Polif11c, title = {{IJSCD} {Special} {Issues} - {Editorial}}, volume = {3}, url = {http://scd.sagepub.com/content/3/3/iii.full.pdf+html}, number = {3}, journal = {Int. J. Spray Comb. Dynamics}, author = {Polifke, W.}, year = {2011}, pages = {iii--vi}, file = {Polifke_2011_IJSCD Special Issues - Editorial.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G32WRD2A\\Polifke_2011_IJSCD Special Issues - Editorial.pdf:application/pdf}, } @phdthesis{Holzi13, type = {{PhD} {Thesis}}, title = {Aspects of the {Thermoacoustic} {Effect} {Considering} {Mean} {Flow}}, school = {TU München}, author = {Holzinger, Tobias}, year = {2013}, file = {Holzi13.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KV3K9KB8\\Holzi13.pdf:application/pdf}, } @inproceedings{PolifFisch01, address = {New Orleans, LO}, series = {{ASME} 2001-{GT}-35}, title = {Instability of a {Premix} {Burner} with {Non}-{Monotonic} {Pressure} {Drop} {Characteristic}}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, author = {Polifke, W. and Fischer, A. and Sattelmayer, T.}, year = {2001}, keywords = {Combustion, Thermoacoustics, Pulsation, Swirl, Premixed flame, Frequency response, Rev'd}, annote = {The following values have no corresponding Zotero field:IS - 2001-GT-35CY - New Orleans, Louisiana}, file = {Polifke et al_2001_Instability of a Premix Burner with Non-Monotonic Pressure Drop Characteristic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P5SF7SJ5\\Polifke et al_2001_Instability of a Premix Burner with Non-Monotonic Pressure Drop Characteristic.pdf:application/pdf}, } @phdthesis{Bamba17, address = {München, Germany}, type = {Semester {Thesis}}, title = {Numerical {Investigation} of the {Impact} of {Grazing} {Flow} on the {Damping} {Performance} of {Acoustic} {Resonators}}, url = {https://mediatum.ub.tum.de/doc/1345899/1345899.pdf}, school = {TUM}, author = {Bambauer, Maxinilian}, year = {2017}, note = {Betreuer: Förner}, file = {Bambauer - 2017 - Numerical Investigation of the Impact of Grazing F.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5DZF75UU\\Bambauer - 2017 - Numerical Investigation of the Impact of Grazing F.pdf:application/pdf}, } @inproceedings{HassaSpinn09, address = {Dubai on the Palm, UAE}, series = {{IDAWC}/{DB09}-289}, title = {Experimental {Analysis} of {PCM}-{Supported} {Humidification}-{Dehumidification} {Desalination} {Systems}}, booktitle = {{IDA} {World} {Congress} on {Desalination} and {Water} {Reuse}}, author = {Hassabou, Abdel Hakim and Spinnler, Markus and Polifke, Wolfgang}, month = nov, year = {2009}, file = {Hassabou et al_2009_Experimental Analysis of PCM-Supported Humidification-Dehumidification.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W4SAJKIR\\Hassabou et al_2009_Experimental Analysis of PCM-Supported Humidification-Dehumidification.pdf:application/pdf}, } @incollection{SelimPolif09, title = {Non-{Linear}, {Low}-{Order} {Model} of {Heat} {Transfer} in {Pulsating} {Flow} based on {Proper} {Orthogonal} {Decomposition}}, booktitle = {Sonderforschungsbereich/{Transregio} 40 - {Annual} {Report}}, author = {Selimefendigil, F. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2009}, pages = {37--56}, file = {Selimefendigil_Polifke_2009_Non-Linear, Low-Order Model of Heat Transfer in Pulsating Flow based on Proper.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KAG2XHBE\\Selimefendigil_Polifke_2009_Non-Linear, Low-Order Model of Heat Transfer in Pulsating Flow based on Proper.pdf:application/pdf}, } @phdthesis{Maier17, address = {Garching, Germany}, type = {Semesterarbeit}, title = {Entwicklung eines {Modells} für die {Erzeugung} und den {Transport} von {Entropiewellen} in einem drallstabilisierten {Brenner}}, language = {Deutsch}, school = {Technische Universität München}, author = {Maier, Christian}, month = mar, year = {2017}, note = {Supervisor: Steinbacher}, file = {Maier - 2017 - Entwicklung eines Modells für die Erzeugung und de.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TQ3XS8UJ\\Maier - 2017 - Entwicklung eines Modells für die Erzeugung und de.pdf:application/pdf}, } @inproceedings{CardePolif11, address = {St. Petersburg, Russia}, title = {Damping {Characteristics} of {Resonator} {Rings} with {Application} to {Low} {Order} {Stability} {Prediction} of {Rocket} {Thrust} {Chambers}}, urldate = {2015-07-30}, booktitle = {4th {European} {Conference} for {Aerospace} {Sciences} ({EUCASS})}, author = {Cárdenas Miranda, A. and Polifke, W.}, year = {2011}, file = {Miranda_Polifke_2011_Damping Characteristics of Resonator Rings with Application to Low Order.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZECWE972\\Miranda_Polifke_2011_Damping Characteristics of Resonator Rings with Application to Low Order.pdf:application/pdf}, } @inproceedings{PolifKrane98a, address = {Prague, CZ}, title = {Linear {Stability} {Analysis} of {Viscous} {Swirling} {Flow}}, booktitle = {Euromech {Colloquium} 377}, author = {Polifke, W. and Kranenbarg, M. and Paschereit, C. O.}, year = {1998}, keywords = {Stability, Swirl, Unrev'd}, file = {Polifke et al_1998_Linear Stability Analysis of Viscous Swirling Flow.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AFQUAJZE\\Polifke et al_1998_Linear Stability Analysis of Viscous Swirling Flow.pdf:application/pdf}, } @inproceedings{MarscMornh09, address = {Fulda, Germany}, title = {Numerische {Simulation} diperser {Gas}-{Flüssig}-{Strömungen} in {Blasensäulen} bei hohen {Gasleerrohrgeschwindigkeiten} mit {OpenFOAM}}, booktitle = {{ProcessNet} {Jahrestreffen} der {Fachausschüsse} {Computational} {Fluid} {Dynamics}, {Mischvorgänge} und {Extraktion}}, publisher = {DECHEMA}, author = {Marschall, H. and Mornhinweg, R. and Hinrichsen, O. and Polifke, W.}, month = mar, year = {2009}, } @incollection{CardePolif11, title = {Study of {Enhanced} heat {Transfer} in {Generic} {Configurations} of {Pulsating} {Flow}}, booktitle = {Sonderforschungsbereich/{Transregio} 40 -- {Annual} {Report}}, author = {Cárdenas Miranda, A. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2011}, pages = {31--42}, file = {Càrdenas Miranda_Polifke_2011_Study of Enhanced heat Transfer in Generic Configurations of Pulsating Flow.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S4S2GDJT\\Càrdenas Miranda_Polifke_2011_Study of Enhanced heat Transfer in Generic Configurations of Pulsating Flow.pdf:application/pdf}, } @inproceedings{RouweWidho18, address = {Oslo, Norway}, title = {Part-{Load} {Limit} {Reduction} of a {Frame} {9E} {Using} a {Precursor} for {Combustion} {Dynamics}}, isbn = {978-0-7918-5105-0}, url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?doi=10.1115/GT2018-75468}, doi = {10.1115/GT2018-75468}, urldate = {2018-10-15}, booktitle = {{ASME} {Turbo} {Expo} 2018: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Rouwenhorst, Driek and Widhopf-Fenk, Robert and Hermann, Jakob and Haeringer, Matthias and Becker, Julius and Gerhard, Jürgen and Niedermeier, Julian}, month = jun, year = {2018}, keywords = {MediaTUM*, published}, pages = {V04AT04A028}, file = {Rouwenhorst et al. - 2018 - Part-Load Limit Reduction of a Frame 9E Using a Pr.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WRPN3J8T\\Rouwenhorst et al. - 2018 - Part-Load Limit Reduction of a Frame 9E Using a Pr.pdf:application/pdf}, } @mastersthesis{Haeri17, address = {Garching, Germany}, title = {Numerische {Bestimmung} thermoakustischer {Moden} eines laminaren {Vormischbrenners}}, school = {TU München}, author = {Haeringer, Matthias}, month = apr, year = {2017}, note = {Betreuer: Merk, Malte}, keywords = {Supervisor: Merk}, file = {Numerische Bestimmung thermoakustischer Moden eines laminaren Vormischbrenners.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SUA3PNHN\\Numerische Bestimmung thermoakustischer Moden eines laminaren Vormischbrenners.pdf:application/pdf}, } @phdthesis{fischer_modeling_2013, type = {Ph.{D}. {Thesis}}, title = {Modeling {Ternary} {Mixing} in {Turbulent} {Flow}}, school = {TU München}, author = {Fischer, Frank Victor}, year = {2013}, file = {Fischer_2013_Modeling Ternary Mixing in Turbulent.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Y4U9SGFW\\Fischer_2013_Modeling Ternary Mixing in Turbulent.pdf:application/pdf}, } @mastersthesis{purwar_investigation_2017, address = {Zürich, Switzerland}, title = {Investigation on low-frequency cavity modes}, school = {ETH Zürich}, author = {Purwar, Naman}, year = {2017}, file = {Purwar_2017_Investigation on low-frequency cavity.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ANMW976I\\Purwar_2017_Investigation on low-frequency cavity.pdf:application/pdf}, } @mastersthesis{kulkarni_computational_2016, address = {Delft, NL}, title = {Computational {Modeling} of {DLR} {Micro} {Gas} {Turbine} {Spray} {Burner}}, school = {TU Delft}, author = {Kulkarni, Sagar}, year = {2016}, file = {Kulkarni_2016_Computational Modeling of DLR Micro Gas.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CRYKQVS9\\Kulkarni_2016_Computational Modeling of DLR Micro Gas.pdf:application/pdf}, } @misc{silva_intrusive_2019, address = {Pisa, Italy}, title = {Intrusive generalized polynomial chaos for the solution of the unsteady {Navier}-{Stokes} equations}, author = {Silva, C. F. and Bonnaire, Philip and Pettersson, Per}, year = {2019}, file = {Silva et al. - 2019 - Intrusive generalized polynomial chaos for the sol.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8GBZMVQW\\Silva et al. - 2019 - Intrusive generalized polynomial chaos for the sol.pdf:application/pdf}, } @inproceedings{HirscFanac05, address = {Reno, NV, USA}, title = {Influence of the {Swirler} {Design} on the {Flame} {Transfer} {Function} of {Premixed} {Flames}}, isbn = {978-0-7918-4725-1 978-0-7918-3754-2}, doi = {10.1115/GT2005-68195}, booktitle = {Volume 2: {Turbo} {Expo} 2005}, publisher = {ASMEDC}, author = {Hirsch, C. and Fanaca, D. and Reddy, P. and Polifke, W. and Sattelmayer, T.}, month = jan, year = {2005}, pages = {151--160}, file = {Hirsch et al_2005_Influence of the Swirler Design on the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ALA9KSMK\\Hirsch et al_2005_Influence of the Swirler Design on the.pdf:application/pdf}, } @incollection{PolifAlbay18, address = {Garching, Germany}, title = {Technically {Premixed} {Flame} {Response} via {Large} {Eddy} {Simulation}}, booktitle = {High {Performance} {Computing} in {Science} and {Engineering} – {Garching}/{Munich}}, author = {Polifke, W. and Albayrak, A.}, editor = {Bastian, P. and Kranzlmüller, D. and Brüchle, H. and Brehm, M.}, year = {2018}, keywords = {published}, file = {Polifke_Albayrak_2018_Technically Premixed Flame Response via.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9GMUH46F\\Polifke_Albayrak_2018_Technically Premixed Flame Response via.pdf:application/pdf}, } @misc{polifke_instabilitaten_2002, address = {Sarntal}, title = {Instabilitäten in der {Thermo}-{Fluiddynamik}}, abstract = {Instabilitäten in Strömungen oder Stro ̈mungsmaschinen verst ̈arken (infinitesimal) kleine Sto ̈run- genundfu ̈hrenzuStro ̈mungs-oderBetriebszust ̈anden,dieweitvomAnfangszustandbzw.vom gewu ̈nschten Betriebspunkt entfernt sind oder periodische Schwankungen um diesen aufweisen. ImVortragwerdeneinigetypischeInstabilit ̈atenundMethodenzurheuristischenbzw.mathe- matischen Beschreibung vorgestellt.}, author = {Polifke, Wolfgang}, year = {2002}, file = {Polifke_2002_Instabilitäten in der.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YLKR3ALQ\\Polifke_2002_Instabilitäten in der.pdf:application/pdf}, } @phdthesis{salassidis_numerical_2018, type = {Semester {Thesis}}, title = {Numerical assessment of velocity and stream function jump conditions over laminar flames}, school = {TU München}, author = {Salassidis, Dimitrios}, year = {2018}, note = {Betreuer: Silva}, file = {Salassidis - 2018 - Numerical assessment of velocity and stream functi.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RAGRT85W\\Salassidis - 2018 - Numerical assessment of velocity and stream functi.pdf:application/pdf}, } @phdthesis{tomas_exploration_2018, type = {Bachelor {Thesis}}, title = {Exploration of {Smoothed} {Particle} {Hydrodynamics} {Techniques} for the {Simulation} of {Floating} {Bodies}}, school = {TU München}, author = {Tomas, Alvaro}, year = {2018}, note = {Betreuer: Silva}, file = {Tomas - 2018 - Exploration of Smoothed Particle Hydrodynamics Tec.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TGBZYGCP\\Tomas - 2018 - Exploration of Smoothed Particle Hydrodynamics Tec.pdf:application/pdf}, } @mastersthesis{koltuk_analytical_2017, title = {Analytical and {Numerical} {Study} of {Acoustic} {Response} of a {1D} {Spray} {Flame}}, school = {TU München}, author = {Koltuk, Kaan}, year = {2017}, note = {Betreuer:Silva}, file = {Koltuk - 2017 - Analytical and Numerical Study of Acoustic Respons.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KM9XCPCX\\Koltuk - 2017 - Analytical and Numerical Study of Acoustic Respons.pdf:application/pdf}, } @phdthesis{bartl_uncertainty_2018, type = {Semester {Thesis}}, title = {Uncertainty {Quantification} of thermoacoustic growth rates by means of intrusive {Polynomial} {Chaos} {Expansion} and state space acoustic solvers.}, school = {TU München}, author = {Bartl, Sebastian}, year = {2018}, note = {Betreuer: Silva}, file = {Bartl - 2018 - Uncertainty Quantification of thermoacoustic growt.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DHJMIK28\\Bartl - 2018 - Uncertainty Quantification of thermoacoustic growt.pdf:application/pdf}, } @phdthesis{bonnaire_development_2018, type = {Semester {Thesis}}, title = {Development of a {2D} stochastic, incompressible {Navier}-{Stokes} solver based on {Finite} {Volumes} and intrusive {Polynomial} {Chaos} {Expansion}}, school = {TU München}, author = {Bonnaire, Philip}, year = {2018}, note = {Betreuer: Silva}, file = {Bonnaire - 2018 - Development of a 2D stochastic, incompressible Nav.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BBQ9ZP8U\\Bonnaire - 2018 - Development of a 2D stochastic, incompressible Nav.pdf:application/pdf}, } @mastersthesis{schuster_intrusive_2018, title = {Intrusive {Polynomial} {Chaos} {Expansion} applied to the {Compressible} {Navier}-{Stokes} {Equations}}, school = {TU München}, author = {Schuster, Stephan}, year = {2018}, note = {Betreuer. Silva}, file = {Schuster, Stephan - Intrusive Polynomial Chaos Expansion applied to th.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7WWX2FB9\\Schuster, Stephan - Intrusive Polynomial Chaos Expansion applied to th.pdf:application/pdf}, } @book{kaipio_statistical_2005, address = {New York}, series = {Applied {Mathematical} {Sciences}}, title = {Statistical and {Computational} {Inverse} {Problems}}, isbn = {978-0-387-22073-4}, url = {//www.springer.com/la/book/9780387220734}, abstract = {The book develops the statistical approach to inverse problems with an emphasis on modeling and computations. The framework is the Bayesian paradigm, where all variables are modeled as random variables, the randomness reflecting the degree of belief of their values, and the solution of the inverse problem is expressed in terms of probability densities. The book discusses in detail the construction of prior models, the measurement noise modeling and Bayesian estimation. Markov Chain Monte Carlo-methods as well as optimization methods are employed to explore the probability distributions. The results and techniques are clarified with classroom examples that are often non-trivial but easy to follow. Besides the simple examples, the book contains previously unpublished research material, where the statistical approach is developed further to treat such problems as discretization errors, and statistical model reduction. Furthermore, the techniques are then applied to a number of real world applications such as limited angle tomography, image deblurring, electrical impedance tomography and biomagnetic inverse problems. The book is intended to researchers and advanced students in applied mathematics, computational physics and engineering. The first part of the book can be used as a text book on advanced inverse problems courses. The authors Jari Kaipio and Erkki Somersalo are Professors in the Applied Physics Department of the University of Kuopio, Finland and the Mathematics Department at the Helsinki University of Technology, Finland, respectively.}, language = {en}, urldate = {2018-09-16}, publisher = {Springer-Verlag}, author = {Kaipio, Jari and Somersalo, E.}, year = {2005}, file = {(Applied Mathematical Sciences) Kaipio J., Somersalo E.-Statistical and computational inverse problems-Springer (2005).pdf:C\:\\Users\\niebl\\Zotero\\storage\\FXTCG3RG\\(Applied Mathematical Sciences) Kaipio J., Somersalo E.-Statistical and computational inverse problems-Springer (2005).pdf:application/pdf;Kaipio and Somersalo - 2005 - Statistical and Computational Inverse Problems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\97R7F4CV\\Kaipio and Somersalo - 2005 - Statistical and Computational Inverse Problems.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\FLPJANDT\\9780387220734.html:text/html}, } @misc{stuart_data_2018, title = {Data {Assimilation} and {Inverse} {Problems}}, author = {Stuart, Andrew}, month = sep, year = {2018}, keywords = {data assimilation, inverse problem}, file = {Lecture_notes.pdf:C\:\\Users\\niebl\\Zotero\\storage\\A2MZWURT\\Lecture_notes.pdf:application/pdf}, } @inproceedings{ryan_gaussian_2018, address = {Oslo, Norway}, series = {{GT2018}-77007}, title = {A {Gaussian} {Process} {Modeling} {Approach} for {Fast} {Robust} {Design} {With} {Uncertain} {Inputs}}, doi = {10.1115/GT2018-77007}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2018}, publisher = {ASME}, author = {Ryan, K. M. and Kristensen, J. and Ling, L. and Ghosh, S. and Asher, I. and Wang, L.}, month = jun, year = {2018}, file = {10.1115@GT2018-77007.pdf:C\:\\Users\\niebl\\Zotero\\storage\\67G823V8\\10.1115@GT2018-77007.pdf:application/pdf}, } @phdthesis{vaughan_adaptive_2015, title = {Adaptive {Machine} {Learning} for {Modeling} and {Control} of {Non}-{Stationary}, {Near} {Chaotic} {Combustion} in {Real}-{Time}.}, url = {https://deepblue.lib.umich.edu/handle/2027.42/111333}, abstract = {Fuel efficient Homogeneous Charge Compression Ignition (HCCI) engine combustion phasing predictions must contend with non-linear chemistry, non-linear physics, near chaotic period doubling bifurcation(s), turbulent mixing, model parameters that can drift day-to-day, and air-fuel mixture state information that cannot typically be resolved on a cycle-to-cycle basis, especially during transients. Unlike many contemporary modeling approaches, this work does not attempt to solve for the myriad of combustion processes that are in practice unobservable in a metal engine. Instead, this work treads closely to physically measurable quantities within the framework of an abstract discrete dynamical system that is explicitly designed to capture many known combustion relationships, without ever explicitly solving for them. This abstract dynamical system is realized with an Extreme Learning Machine (ELM) that is extended to adapt to the combustion process from cycle-to-cycle with a new Weighted Ring-ELM algorithm. Combined, the above techniques are shown to provide unprecedented cycle-to-cycle predictive capability during transients, near chaotic combustion, and at steady-state, right up to complete misfire. These predictions only require adding an in-cylinder pressure sensor to production engines, which could cost as little as \$13 per cylinder. By design, the framework is computationally efficient, and the approach is shown to predict combustion in sub-millisecond real-time using only an iPhone generation 1 processor (the \$35 Raspberry Pi). This is in stark contrast to supercomputer approaches that model down to the minutiae of individual reactions but have yet to demonstrate such fidelity against cycle-to-cycle experiments. Finally, the feasibility of cycle-to-cycle model predictive control with this real-time framework is demonstrated.}, urldate = {2018-08-20}, school = {The University of Michigan}, author = {Vaughan, Adam}, year = {2015}, file = {Adaptive Machine Learning for Modeling and Control of Non-Stationary, Near Chaotic Combustion in Real-Time.:C\:\\Users\\niebl\\Zotero\\storage\\ZLAKX95V\\111333.html:text/html;Vaughan - 2015 - Adaptive Machine Learning for Modeling and Control.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YN3BGE2E\\Vaughan - 2015 - Adaptive Machine Learning for Modeling and Control.pdf:application/pdf}, } @phdthesis{Dirnb18, type = {Bachelor's {Thesis}}, title = {Thermal design of a test rig for a pulsating heat pipe}, language = {en}, school = {TU München}, author = {Dirnberger, Lukas}, month = nov, year = {2018}, note = {Betreuer: Felix Schily}, file = {Dirnberger - Thermal design of a test rig for a pulsating heat .pdf:C\:\\Users\\niebl\\Zotero\\storage\\S5BY4HML\\Dirnberger - Thermal design of a test rig for a pulsating heat .pdf:application/pdf}, } @techreport{AvdonPolif18a, type = {Abschlussbericht {COOREFLEX}}, title = {{LES}-basierte {Analyse} hochfrequenter {Verbrennungsinstabilitäten}}, number = {03ET7021U}, author = {Avdonin, Alexander and Polifke, Wolfgang}, year = {2018}, keywords = {auf Genehmigung PTJ warten}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\Q5AWRSMG\\Avdonin, Alexander and Polifke, Wolfgang - 2018 - LES-basierte Analyse hochfrequenter Verbrennungsinstabilitäten.pdf:application/pdf}, } @article{RouweHerma16b, series = {originally published as {GT2016}-56671}, title = {Online {Monitoring} of {Thermoacoustic} {Eigenmodes} in {Annular} {Combustion} {Systems} {Based} on a {State}-{Space} {Model}}, volume = {139}, doi = {doi:10.1115/1.4034260}, number = {2}, journal = {J Eng Gas Turb Power}, author = {Rouwenhorst, Driek and Hermann, Jakob and Polifke, Wolfgang}, year = {2017}, note = {originally published as GT2016-56671}, keywords = {MediaTUM}, file = {Rouwenhorst et al. - 2017 - Online Monitoring of Thermoacoustic Eigenmodes in .pdf:C\:\\Users\\niebl\\Zotero\\storage\\Q9EGZBCE\\Rouwenhorst et al. - 2017 - Online Monitoring of Thermoacoustic Eigenmodes in .pdf:application/pdf}, } @inproceedings{RouweHerma16, address = {Seoul, Korea}, series = {{GT2016}-56671}, title = {Online monitoring of thermoacoustic eigenmodes in annular combustion systems based on a state space model}, doi = {10.1115/GT2016-56671}, booktitle = {Proceedings of {ASME} 2016 {Turbo} {Expo}: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, publisher = {ASME}, author = {Rouwenhorst, Driek and Hermann, Jakob and Polifke, Wolfgang}, year = {2016}, keywords = {MediaTUM}, file = {Rouwenhorst et al_2016_Online monitoring of thermoacoustic eigenmodes in annular combustion systems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JDTX3DPU\\Rouwenhorst et al_2016_Online monitoring of thermoacoustic eigenmodes in annular combustion systems.pdf:application/pdf}, } @article{RouweHerma17a, title = {Bifurcation study of azimuthal bulk flow in annular combustion systems with cylindrical symmetry breaking}, volume = {9}, issn = {1756-8277, 1756-8285}, url = {http://journals.sagepub.com/doi/10.1177/1756827717715858}, doi = {10.1177/1756827717715858}, language = {en}, number = {4}, urldate = {2019-01-16}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Rouwenhorst, Driek and Hermann, Jakob and Polifke, Wolfgang}, month = dec, year = {2017}, keywords = {MediaTUM}, pages = {438--451}, file = {Rouwenhorst et al_2017_Bifurcation study of azimuthal bulk.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CBB35GUK\\Rouwenhorst et al_2017_Bifurcation study of azimuthal bulk.pdf:application/pdf;Rouwenhorst et al. - 2017 - Bifurcation study of azimuthal bulk flow in annula.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QPIURU6W\\Rouwenhorst et al. - 2017 - Bifurcation study of azimuthal bulk flow in annula.pdf:application/pdf;Rouwenhorst et al. - 2017 - Bifurcation study of azimuthal bulk flow in annula.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RTSISJNJ\\Rouwenhorst et al. - 2017 - Bifurcation study of azimuthal bulk flow in annula.pdf:application/pdf}, } @inproceedings{marschall_numerical_2008, address = {Würzburg, Germany}, title = {Numerical {Simulation} of {Bubble} {Column} {Reactors} using a {Hybrid} {Multiphase}-{CFD} {Approach}}, booktitle = {Jahrestreffen {Reaktionstechnik}}, publisher = {DECHEMA}, author = {Marschall, H. and Hinrichsen, O. and Polifke, W.}, year = {2008}, } @article{AvdonPolif18b, series = {{GTP}-18-1364}, title = {Quantification of the {Impact} of {Uncertainties} in {Operating} {Conditions} on the {Flame} {Transfer} {Function} with {Non}-{Intrusive} {Polynomial} {Chaos} {Expansion}}, volume = {141}, doi = {10.1115/1.4040745}, number = {1}, journal = {J. Eng. Gas Turbines and Power}, author = {Avdonin, Alexander and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM*}, pages = {011020}, file = {Avdonin and Polifke - 2018 - Quantification of the Impact of Uncertainties in O.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KQP9QQ6U\\Avdonin and Polifke - 2018 - Quantification of the Impact of Uncertainties in O.pdf:application/pdf}, } @inproceedings{RouweHerma14, address = {Beijing, China}, title = {On the {Performance} of {Stability} {Margin} {Measures} for {Thermoacoustic} {Instabilities} {In} {Turbulent} {Combustion} {Systems}}, booktitle = {{ICSV21} {Conference} {Proceedings}}, publisher = {International Institute of Acoustics and Vibration (IIAV)}, author = {Rouwenhorst, Driek and Hermann, Jakob and Müller, Roel and Polifke, Wolfgang}, month = jul, year = {2014}, file = {Rouwenhorst et al_2014_On the Performance of Stability Margin Measures for Thermoacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S2CE5624\\Rouwenhorst et al_2014_On the Performance of Stability Margin Measures for Thermoacoustic.pdf:application/pdf}, } @phdthesis{dems_eulerian-eulerian_2014, address = {München, Germany}, type = {Ph.{D}. {Thesis}}, title = {On {Eulerian}-{Eulerian} {Large} {Eddy} {Simulation} of {Polydispersed}, {Reacting} {Spray} {Flows} with {Moment} {Methods}}, url = {https://mediatum.ub.tum.de/doc/1230166/document.pdf}, school = {TU München}, author = {Dems, Patrick}, year = {2014}, file = {Dems_2014_On Eulerian-Eulerian Large Eddy.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FP4N6I9N\\Dems_2014_On Eulerian-Eulerian Large Eddy.pdf:application/pdf}, } @phdthesis{albayrak_time_2019, type = {Ph.{D}. {Thesis}}, title = {Time {Scales} of {Equivalence} {Ratio} and {Inertial} {Waves} in {Unsteady} {Combustion} {Dynamics}}, school = {TU München}, author = {Albayrak, Alp}, year = {2019}, keywords = {published}, file = {Albayrak_2019_Time Scales of Equivalence Ratio and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PTLN2VHR\\Albayrak_2019_Time Scales of Equivalence Ratio and.pdf:application/pdf}, } @inproceedings{AcherLenz15, address = {Lüneburg, Germany}, series = {6092}, title = {Numerische {Simulation} von {Hydrodynamik} und {Stoffübergang} in polydispersen {Blasensäulenströmungen} mit {Hilfe} einer {Momentenmethode}}, booktitle = {Processnet - {Jahrestreffen} der {Fachgruppen} {Computational} {Fluid} {Dynamics} und {Mehrphasenströmungen}}, publisher = {VDI}, author = {Acher, Thomas and Lenz, Stefan and Gobert, Christian and Dems, Patrick and Polifke, Wolfgang}, month = mar, year = {2015}, } @inproceedings{StrobHosse16, address = {Athens, Greece}, title = {Acoustic {Scattering} {Behaviour} of a {2D} {Flame} with {Heat} {Exchanger} in {Cross}-{Flow}}, booktitle = {23nd {Int}. {Congress} on {Sound} and {Vibration} ({ICSV23})}, publisher = {IIAV}, author = {Strobio Chen, L. and Hosseini, N. and Polifke, W. and Teerling, J. and Kornilov, V. and Lopez Arteaga, I and de Goey, P.}, month = jul, year = {2016}, file = {ICSV23_paper_by_Lin_Strobio_Chen_and_Naseh_Hosseini.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SMQBHSIQ\\ICSV23_paper_by_Lin_Strobio_Chen_and_Naseh_Hosseini.pdf:application/pdf}, } @phdthesis{Paggi08, type = {{PhD} {Thesis}}, title = {Investigation of {Cryogenic} {Hydrogen} {Storage} on {High} {Surface} {Area} {Activated} {Carbon}: {Equilibrium} and {Dynamics}}, school = {TU München}, author = {Paggiaro, Ricardo Gaspar}, year = {2008}, file = {paggiaro.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XCKCWHDT\\paggiaro.pdf:application/pdf}, } @inproceedings{CarneDems10, address = {Tampa, FL}, title = {Eulerian {Simulations} of {Polydisperse} {Flows} using a {Moments} {Model} with a {Relaxation} {Approach} for the {Moment} {Transport} {Velocities}}, booktitle = {7th {Int}. {Conf}. on {Multiphase} {Flow}, {ICMF} 2010}, author = {Carneiro, J. 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S. and Subramanian, P. and Sujith, R. and Polifke, W.}, month = oct, year = {2012}, keywords = {Combustion, Turbulence, Premixed flame, Rev'd}, } @phdthesis{Duran07, type = {{PhD} {Thesis}}, title = {Development, implementation and validation of {LES} models for inhomogeneously premixed turbulent combustion}, url = {http://www.td.mw.tum.de/tum-td/de/forschung/dissertationen/download/P2007/duran07.pdf}, school = {TU München}, author = {Durand, L.}, year = {2007}, keywords = {Combustion, Turbulence, Premixed flame}, file = {Durand_2007_Development, implementation and validation of LES models for inhomogeneously.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TA5NJ585\\Durand_2007_Development, implementation and validation of LES models for inhomogeneously.pdf:application/pdf}, } @inproceedings{CarneKaufm09, address = {Fulda, Germany}, title = {Development of a moments-based {CFD} model for polydisperse multiphase flows}, booktitle = {{ProcessNet} {Jahrestreffen} der {Fachausschüsse} {Computational} {Fluid} {Dynamics}, {Mischvorgänge} und {Extraktion}}, publisher = {DECHEMA}, author = {Carneiro, J. N. E. and Kaufmann, V. and Felten, B. and Polifke, W.}, month = mar, year = {2009}, file = {Carneiro et al_2009_Development of a moments-based CFD model for polydisperse multiphase flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TF4MBTSI\\Carneiro et al_2009_Development of a moments-based CFD model for polydisperse multiphase flows.pdf:application/pdf}, } @inproceedings{ForneTourn16, address = {Lyon, France}, title = {Scattering to {Higher} {Harmonics} for {Quarter} {Wave} and {Helmholtz} {Resonators}}, url = {http://dx.doi.org/10.2514/6.2016-2968}, doi = {10.2514/6.2016-2968}, booktitle = {22nd {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, author = {Förner, K. and Tournadre, J. and Martínez-Lera, P. and Polifke, W.}, month = may, year = {2016}, file = {Förner et al. - 2016 - Scattering to Higher Harmonics for Quarter Wave an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IJZPZMV9\\Förner et al. - 2016 - Scattering to Higher Harmonics for Quarter Wave an.pdf:application/pdf}, } @techreport{Polif03, address = {www.td.mw.tum.de/Personen/Polifke}, title = {Discrete-{Time} {Linear} {Systems} {Primer}}, url = {www.td.mw.tum.de/Personen/Polifke}, institution = {TU München}, author = {Polifke, W.}, year = {2003}, keywords = {Low order model, Simulation + Modelling, Frequency response, linear system}, } @mastersthesis{Cabre15, address = {Garching, Germany}, title = {Linear {System} {Identification} of the {Heat} {Transfer} {Behavior} of a {Cylinder} in {Pulsating} {Cross}-{Flow} at {Re} = 3900 {Using} {Large} {Eddy} {Simulation}}, school = {Technischen Universität München}, author = {Cabrera, Ana}, month = nov, year = {2015}, note = {Betreuer: Armin Witte}, file = {Cabrera - 2015 - Linear System Identification of the Heat Transfer .pdf:C\:\\Users\\niebl\\Zotero\\storage\\PTSAHMHJ\\Cabrera - 2015 - Linear System Identification of the Heat Transfer .pdf:application/pdf}, } @phdthesis{Gsche15, address = {Garching}, type = {Bachelor's {Thesis}}, title = {Untersuchungen zur (linearen) {Modellierung} der transienten {Wärmefreisetzung} laminarer {Flammen} bei akustischer {Anregung}}, school = {Technische Universität München}, author = {Gscheidle, Christian}, year = {2015}, note = {Betreuer. Steinbacher}, file = {Bachelorthesis_Christian_Gscheidle_2015.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JC9XRBXJ\\Bachelorthesis_Christian_Gscheidle_2015.pdf:application/pdf}, } @article{KaltePolif11, title = {Some regularization methods for a thermoacoustic inverse problem}, volume = {18}, doi = {10.1515/JIIP.2011.017}, journal = {Journal of Inverse and Ill-Posed Problems}, author = {Kaltenbacher, B. and Polifke, W.}, month = apr, year = {2011}, keywords = {Thermoacoustics, Regularization}, pages = {997 -- 1011}, file = {Kaltenbacher_Polifke_2011_Some regularization methods for a thermoacoustic inverse problem.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZKXJ4TQV\\Kaltenbacher_Polifke_2011_Some regularization methods for a thermoacoustic inverse problem.pdf:application/pdf}, } @inproceedings{FollePolif10, address = {Stockholm, Sweden}, series = {{AIAA} 2010-3985}, title = {Aero-{Acoustic} {Characterization} of {T}-{Junctions} {Based} on {Large} {Eddy} {Simulation} and {System} {Identification}}, booktitle = {16th {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, author = {Föller, S. and Polifke, W. and Tonon, D.}, year = {2010}, file = {Föller et al_2010_Aero-Acoustic Characterization of T-Junctions Based on Large Eddy Simulation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9S62HCG5\\Föller et al_2010_Aero-Acoustic Characterization of T-Junctions Based on Large Eddy Simulation.pdf:application/pdf}, } @article{SelimPolif14, series = {1}, title = {A nonlinear, {Proper}-{Orthogonal}-{Decomposition}-based model of forced convection heat transfer in pulsating flow}, volume = {52}, url = {http://arc.aiaa.org/doi/abs/10.2514/1.J051647}, doi = {10.2514/1.J051647}, journal = {AIAA Journal}, author = {Selimefendigil, F. and Polifke, W.}, month = jan, year = {2014}, pages = {131--145}, file = {Selimefendigil_Polifke_2014_A nonlinear, Proper-Orthogonal-Decomposition-based model of forced convection.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DMR3N8NW\\Selimefendigil_Polifke_2014_A nonlinear, Proper-Orthogonal-Decomposition-based model of forced convection.pdf:application/pdf}, } @inproceedings{ShtilPolif90, address = {Cambridge, UK}, title = {Reduction of {Nonlinearity} and {Energy} {Cascade} in {Helical} and {Nonhelical} {Turbulent} {Flows}}, booktitle = {Proceedings of the {IUTAM} {Symposium} on ''{Topological} {Fluid} {Mechanics}''}, publisher = {Cambridge Univ. Press}, author = {Shtilman, L. and Polifke, W.}, year = {1990}, keywords = {Turbulence, Rev'd, Helicity}, pages = {596--606}, } @inproceedings{GenteCaton01, title = {Decomposition and {Oxidation} of a {Urea}-{Water} {Solution} as {Used} in {Selective} {Non}-{Catalytic} {Removal} ({SNCR}) {Processes}}, author = {Gentemann, A M G and Caton, J A}, year = {2001}, pages = {8--8}, annote = {The following values have no corresponding Zotero field:JF - 2nd Joint Meeting of the United States Sections of the Combustion InstituteCY - Oakland, CA, USA}, } @techreport{GentePolif04, title = {9. {Statusseminar} der {AG} {Turbo} {Verbundprojekt} für ein {CO2}-armes {Kraftwerk} "500 {MW} auf einer {Welle}"}, author = {Gentemann, A and Polifke, W and Flohr, P and Schuermans, B and Krebs, W and Lepers, J}, year = {2004}, } @phdthesis{Schuw17, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Numerische {Untersuchung} der gekoppelten {Wärmeübertragung} bei kombinierter {Prall}- und {Effusionskühlung}}, language = {German}, school = {TU München}, author = {Schuwerk, Leonhard}, year = {2017}, note = {Betreuer: Förner}, file = {Schuwerk - 2017 - Numerische Untersuchung der gekoppeltenn Wärmeüber.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6W5QMWC7\\Schuwerk - 2017 - Numerische Untersuchung der gekoppeltenn Wärmeüber.pdf:application/pdf}, } @inproceedings{CarneKaufm08, title = {Implementation of a {Moments} {Model} in {OpenFOAM} for {Polydispersed} {Multiphase} {Flows}}, booktitle = {Open {Source} {CFD} {Int}'l {Conference}}, author = {Carneiro, J. E. and Kaufmann, V. and Polifke, W.}, year = {2008}, file = {Carneiro et al_2008_Implementation of a Moments Model in OpenFOAM for Polydispersed Multiphase Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\87VJ5EJX\\Carneiro et al_2008_Implementation of a Moments Model in OpenFOAM for Polydispersed Multiphase Flows.pdf:application/pdf}, } @article{ShtilPolif89, series = {5}, title = {On the {Mechanism} of the {Reduction} of {Nonlinearity} in the {Incompressible} {Navier}-{Stokes} {Equation}}, volume = {1}, journal = {Phys. of Fluids A}, author = {Shtilman, L. and Polifke, W.}, year = {1989}, keywords = {Turbulence, Rev'd, Helicity}, pages = {778--780}, file = {Shtilman_Polifke_1989_On the Mechanism of the Reduction of Nonlinearity in the Incompressible.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4FMW2Z3X\\Shtilman_Polifke_1989_On the Mechanism of the Reduction of Nonlinearity in the Incompressible.pdf:application/pdf}, } @inproceedings{Polif05a, address = {Erlangen, Germany}, title = {Physikalische {Mechanismen} und {Numerische} {Modelle} thermo-akustischer {Verbrennungsinstabilitäten}}, booktitle = {3. {Verbrennungstechnisches} {Kolloquium}}, publisher = {Universität Erlangen / RWTH Aachen}, author = {Polifke, W.}, month = oct, year = {2005}, } @inproceedings{DemsCarne11, address = {SINTEF/NTNU, Trondheim, Norway}, title = {Large {Eddy} {Simulation} of {Particle}-{Laden} {Swirling} {Flow} with a {Presumed} {Function} {Method} of {Moments}}, volume = {CFD11-92}, booktitle = {8th {International} {Conference} on {CFD} in {Oil} \& {Gas} {Metallurgical} and {Process} {Industries}}, author = {Dems, P and Carneiro, N E and Polifke, Wolfgang}, year = {2011}, file = {Dems et al_2011_Large Eddy Simulation of Particle-Laden Swirling Flow with a Presumed Function.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QD2I7BSR\\Dems et al_2011_Large Eddy Simulation of Particle-Laden Swirling Flow with a Presumed Function.pdf:application/pdf}, } @inproceedings{FischMural08, address = {Berlin, Germany}, title = {Simulation of ternary mixing in a co-annular jet in crossflow}, booktitle = {Int. {Conf}. on {Jets}, {Wakes} and {Separated} {Flows}}, publisher = {Technical University Berlin}, author = {Fischer, F. V. and Muralidharan, B. and Polifke, W.}, month = sep, year = {2008}, keywords = {Fluid Dynamics, Turbulence, LES, Mixing}, file = {Fischer et al_2008_Simulation of ternary mixing in a co-annular jet in crossflow.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J4BXKKF4\\Fischer et al_2008_Simulation of ternary mixing in a co-annular jet in crossflow.pdf:application/pdf}, } @inproceedings{Polif14a, address = {IIT Madras, Chennai, India}, title = {Microphone {Measurements} in ({Thermo}-){Acoustics}}, booktitle = {{TANGO} {Workshop} ``{Experimental} {Methods} in {Thermoacoustics}''}, author = {Polifke, Wolfgang}, month = feb, year = {2014}, } @inproceedings{BrandPolif02b, address = {Sorrento, Italy}, title = {Tabulation of {Mean} {Reaction} {Rates} from {Multivariate}, {Correlated} {Distributions} with a {Monte} {Carlo} {Method}}, booktitle = {9th {Int}. {Conference} on {Numerical} {Combustion}}, publisher = {SIAM}, author = {Brandt, M. and Polifke, W.}, month = apr, year = {2002}, keywords = {Combustion, Simulation + Modelling, Unrev'd Thermo-Acoustics}, file = {Brandt_Polifke_2002_Tabulation of Mean Reaction Rates from Multivariate, Correlated Distributions.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R9P7XPJT\\Brandt_Polifke_2002_Tabulation of Mean Reaction Rates from Multivariate, Correlated Distributions.pdf:application/pdf}, } @inproceedings{PolifWall04, address = {St. Petersburg, Russia}, title = {Partially {Reflecting} and {Non}-{Reflecting} {Boundary} {Conditions} for {Simulation} of {Compressible} {Viscous} {Flow}}, booktitle = {11th {Int}. {Congress} on {Sound} and {Vibration} ({ICSV11})}, publisher = {IIAV}, author = {Polifke, W. and Wall, C.}, month = jul, year = {2004}, keywords = {Acoustics, Turbulence, CFD}, pages = {813--820}, file = {Polifke_Wall_2004_Partially Reflecting and Non-Reflecting Boundary Conditions for Simulation of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HAGWAKIQ\\Polifke_Wall_2004_Partially Reflecting and Non-Reflecting Boundary Conditions for Simulation of.pdf:application/pdf}, } @inproceedings{EmmerBombe14a, address = {Copenhagen, Denmark}, title = {Flame-{Intrinsic} and {Acoustic} {Modes} of a {Premix} {Combustor}}, booktitle = {{EFMC10} -- 10th {European} {Fluid} {Mechanics} {Conference}}, author = {Emmert, T. and Bomberg, S. and Polifke, W.}, month = sep, year = {2014}, } @phdthesis{Liao13, type = {{PhD} {Thesis}}, title = {Development and {Validation} of {Models} for {Bubble} {Coalescence} and {Breakup}}, school = {Dresden University of Technology}, author = {Liao, Yixiang}, year = {2013}, file = {Liao13.pdf:C\:\\Users\\niebl\\Zotero\\storage\\87P8ANPN\\Liao13.pdf:application/pdf}, } @techreport{GharaKaufm04, title = {{CFD} - {Modellierung} der {Sprayausbreitung} und -verdampfung mit einem {Euler}-{Euler} {Ansatz} und angenommener {Tropfenanzahldichtefunktion} -- {Zwischenbericht}}, institution = {Lehrstuhl für Thermodynamik, TU München}, author = {Gharaibah, Emad and Kaufmann, Volker and Polifke, Wolfgang}, year = {2004}, file = {Gharaibah et al_2004_CFD - Modellierung der Sprayausbreitung und -verdampfung mit einem Euler-Euler.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I5GSDA93\\Gharaibah et al_2004_CFD - Modellierung der Sprayausbreitung und -verdampfung mit einem Euler-Euler.pdf:application/pdf}, } @inproceedings{FolleKaess09, address = {Munich, Germany}, title = {Determination of {Acoustic} {Scattering} {Coefficients} via {LES} and {System} {Identification}}, booktitle = {Euromech {Colloquium} 540 ''{Large}-{Eddy} {Simulation} for {Aerodynamics} and {Aeroacoustics}''}, publisher = {Euromech}, author = {Föller, S. and Kaess, R. and Polifke, W.}, month = mar, year = {2009}, file = {Föller et al_2009_Determination of Acoustic Scattering Coefficients via LES and System.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8XAIQQAZ\\Föller et al_2009_Determination of Acoustic Scattering Coefficients via LES and System.pdf:application/pdf}, } @inproceedings{KampmSeege93, address = {Cambridge, UK}, title = {{CARS} and {2D} {Rayleigh} {Temperature} {Measurements} in a {Turbulent} {Industrial} {Swirl} {Combustor}}, booktitle = {Proceedings of the {Anglo}-{German} {Meeting} of the {Combustion} {Institute}}, publisher = {Combustion Institute}, author = {Kampmann, S. and Seeger, T. and Leipertz, A. and Polifke, W. and Döbbeling, K.}, year = {1993}, keywords = {Combustion, Swirl, Turbulence, Premixed flame, Unrev'd}, } @inproceedings{PolifKopit01, address = {Maastricht, The Netherlands}, series = {{AIAA} 2001-2104}, title = {Impact of the {Fuel} {Time} {Lag} {Distribution} in {Elliptical} {Premix} {Nozzles} on {Combustion} {Stability}}, doi = {10.2514/6.2001-2104}, booktitle = {7th {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, author = {Polifke, W. and Kopitz, J. and Serbanovic, A.}, year = {2001}, keywords = {Combustion, Thermoacoustics, CFD, Frequency response, Unrev'd, pulsations, transfer fraction}, file = {Polifke et al_2001_Impact of the Fuel Time Lag Distribution in Elliptical Premix Nozzles on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WCIQX3XV\\Polifke et al_2001_Impact of the Fuel Time Lag Distribution in Elliptical Premix Nozzles on.pdf:application/pdf}, } @techreport{KomarPolif05, title = {Zwischenbericht des {Forschungsverbundes} {KW21}-- {Projekt} {GV} 6 {Dynamik} von {Vormischflammen}}, institution = {Technische Universität München}, author = {Komarek, T. and Polifke, W.}, month = sep, year = {2005}, file = {Komarek_Polifke_2005_Zwischenbericht des Forschungsverbundes KW21-- Projekt GV 6 Dynamik von.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RQ3DQ4DA\\Komarek_Polifke_2005_Zwischenbericht des Forschungsverbundes KW21-- Projekt GV 6 Dynamik von.pdf:application/pdf}, } @mastersthesis{Caeir15, title = {Shape {Optimisation} for {Aeroacoustic} {Optimisation}}, school = {TU München}, author = {Caeiro, Faisal}, year = {2015}, file = {Caeiro - 2015 - Shape Optimisation for Aeroacoustic Optimisation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\689Z9R49\\Caeiro - 2015 - Shape Optimisation for Aeroacoustic Optimisation.pdf:application/pdf}, } @book{PolifKopit09, address = {München}, edition = {2}, series = {Maschinenbau}, title = {Wärmeübertragung}, url = {http://lib.myilibrary.com?id=505990}, publisher = {Pearson Education}, author = {Polifke, W. and Kopitz, J.}, year = {2009}, } @inproceedings{TononNakib09, address = {Miami, U.S.A.}, series = {{AIAA} 2009-3262}, title = {Self-sustained aeroacoustic oscillations in multiple side branch pipe systems}, booktitle = {15th {AIAA}/{CEAS} {Aeroacoustics} {Conference} (30th {AIAA} {Aeroacoustics} {Conference})}, author = {Tonon, D. and Nakiboglu, G. and Willems, J. F. H. and Hirschberg, A. and Leandro, R. E. and Polifke, W. and Riezebos, H. J.}, year = {2009}, file = {Tonon et al_2009_Self-sustained aeroacoustic oscillations in multiple side branch pipe systems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6WEJ2E7P\\Tonon et al_2009_Self-sustained aeroacoustic oscillations in multiple side branch pipe systems.pdf:application/pdf}, } @article{HassaSpinn14b, title = {The role of conductive packing in direct contact humidification-dehumidification regenerators-part {I}: {Theoretical} analysis}, volume = {5}, url = {http://www.iaeme.com/MasterAdmin/UploadFolder/THE%20ROLE%20OF%20CONDUCTIVE%20PACKING%20IN%20DIRECT%20CONTACT%20HUMIDIFICATION-DEHUMIDIFICATION%20REGENERATORS%20-%20PART%20I%20THEORETICAL%20ANALYSIS/THE%20ROLE%20OF%20CONDUCTIVE%20PACKING%20IN%20DIRECT%20CONTACT%20HUMIDIFICATION-DEHUMIDIFICATION%20REGENERATORS%20-%20PART%20I%20THEORETICAL%20ANALYSIS.pdf}, number = {12}, urldate = {2015-02-28}, journal = {Int. J. of Advanced Research in Engineering and Technology (IJARET)}, author = {Hassabou, Abdelhakim and Spinnler, Markus and Polifke, Wolfgang}, year = {2014}, pages = {126--138}, file = {Hassabou et al_2014_The role of conductive packing in direct contact.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PS3FRUMX\\Hassabou et al_2014_The role of conductive packing in direct contact.pdf:application/pdf}, } @inproceedings{ColloKulka11, address = {Dolce Chantilly, Paris-Chantilly, France}, title = {Large-{Eddy} {Simulation} of {Auto}-ignition {Processes} for {Industrial} {Applications}}, booktitle = {Open {Source} {CFD} {Int}'l {Conference}}, author = {Collonval, F. and Kulkarni, R. and Polifke, W.}, month = nov, year = {2011}, file = {Collonval et al_2011_Large-Eddy Simulation of Auto-ignition Processes for Industrial Applications.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MP4NNHV7\\Collonval et al_2011_Large-Eddy Simulation of Auto-ignition Processes for Industrial Applications.pdf:application/pdf}, } @phdthesis{Brand05, type = {{PhD} {Thesis}}, title = {Beschreibung der {Selbstzündung} in turbulenter {Strömung} unter {Einbeziehung} ternärer {Mischvorgänge}}, url = {http://mediatum.ub.tum.de/doc/601964/file.pdf}, urldate = {2014-11-10}, school = {TU München}, author = {Brandt, Martin}, year = {2005}, file = {Brandt_2005_Beschreibung der Selbstzündung in turbulenter Strömung unter Einbeziehung.pdf:C\:\\Users\\niebl\\Zotero\\storage\\63EA2UI9\\Brandt_2005_Beschreibung der Selbstzündung in turbulenter Strömung unter Einbeziehung.pdf:application/pdf}, } @inproceedings{PolifHenni12, title = {Different {Approaches} to {Nonlinear} {Stability} {Analysis}}, booktitle = {Dresden {Scientific} {Workshop} {On} {Reactor} {Dynamics} {And} {Safety} 2012}, author = {Polifke, W. and Hennig, D.}, month = sep, year = {2012}, } @inproceedings{HolziBaumg08, address = {Vilnius, Lithuania}, title = {A {Linear} {1D} {Model} for the {Thermoacoustic} {Effect} in the {Presence} of {Mean} {Flows}}, booktitle = {19th {International} {Congress} on {Sound} and {Vibration} ({ICSV19})}, author = {Holzinger, T. and Baumgartner, A. and Polifke, W.}, month = jul, year = {2012}, keywords = {Low order model, Acoustics, Frequency response}, file = {Holzinger et al_2012_A One-Dimensional Model for the Thermoacoustic Effect in Presence of Moderate.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WI9ERK4H\\Holzinger et al_2012_A One-Dimensional Model for the Thermoacoustic Effect in Presence of Moderate.pdf:application/pdf}, } @article{MulleHerma16, title = {Control authority over a combustion instability investigated in {CFD}}, volume = {8}, url = {http://scd.sagepub.com/content/early/2016/04/11/1756827715627071.full.pdf+html}, doi = {10.1177/1756827715627071}, number = {1}, journal = {Int. J. Spray Combust. Dyn.}, author = {Müller, Roel A. J. and Hermann, Jakob and Polifke, Wolfgang}, year = {2016}, pages = {39--52}, file = {Müller et al_2016_Control authority over a combustion instability investigated in CFD.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EQVX8IMK\\Müller et al_2016_Control authority over a combustion instability investigated in CFD.pdf:application/pdf}, } @inproceedings{PolifShtil88, address = {Buffalo, NY}, series = {{APS}/{DFD} {Annual} {Meeting}}, title = {Helicity and the {Transfer} of {Energy} in {Decaying} {Turbulence}}, booktitle = {{APS}/{DFD} {Annual} {Meeting}}, publisher = {APS}, author = {Polifke, W. and Shtilman, L.}, year = {1988}, keywords = {Turbulence, Simulation + Modelling, Unrev'd}, annote = {The following values have no corresponding Zotero field:CY - Buffalo, NY}, } @inproceedings{Polif06b, address = {Erlangen, Germany}, title = {Flammenstabilität und {Thermoakustik}}, booktitle = {Kurzlehrgang {Verbrennung}}, publisher = {LTT Erlangen}, author = {Polifke, W.}, month = mar, year = {2006}, } @inproceedings{RouweHerma17, address = {Zürich, Switzerland}, series = {{GPPF}-2017-10}, title = {In {Situ} {Identification} of {Thermoacoustic} {Stability} in {Annular} {Combustors}}, booktitle = {1st {Global} {Power} and {Propulsion} {Forum}}, author = {Rouwenhorst, Driek and Hermann, Jakob and Polifke, Wolfgang}, month = jan, year = {2017}, keywords = {MediaTUM}, file = {Rouwenhorst et al_2017_In Situ Identification of Thermoacoustic Stability in Annular Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RVCEIIDK\\Rouwenhorst et al_2017_In Situ Identification of Thermoacoustic Stability in Annular Combustors.pdf:application/pdf}, } @inproceedings{HassaSpinn11, address = {Perth, Australia}, series = {{IDAWC}/{PER11}-098}, title = {Transient {Analysis} and {Optimization} of a {PCM}-{Supported} {Humidification}-{Dehumidification} {Solar} {Desalination} {System}}, booktitle = {{IDA} {World} {Congress} on {Desalination} and {Water} {Reuse}}, author = {Hassabou, Abdel Hakim and Spinnler, Markus and Hanafi, Abdalla and Polifke, Wolfgang}, month = sep, year = {2011}, file = {Hassabou et al_2011_Transient Analysis and Optimization of a PCM-Supported.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4Z3SV7KG\\Hassabou et al_2011_Transient Analysis and Optimization of a PCM-Supported.pdf:application/pdf}, } @inproceedings{LeeViola16c, address = {Florence, Italy}, title = {Experimental investigation on two-phase horizontal intermittent flow through an orifice}, abstract = {Acoustic phenomena in two-phase flow enjoy particular interest from industry, since significant noise may be generated, for example, by large volumetric changes associated with flow through a control valve. In the present study, the acoustic effects of a horizontal intermittent water-air flow through an orifice are investigated experimentally. The two-phase flow is generated by injecting air at a rate of 0.01 to 3.2 [g/s] to water flowing in a pipe with diameter of 25 mm at a given rate in the range from 20 to 800 [g/s], where the pressure varies from 1.5 to 6 bar at ambient temperature. Orifice diameters of 2 mm, 5 mm and 10 mm are investigated. Unsteady pressure fluctuations are recorded to provide data for spectral analysis by pressure transducers located upstream and downstream of the orifice. The flow regime is visually recognized as slug and plug flow. The slug and plug frequency lies between 0.1 and 5 Hz and primarily rises with the higher water mass flow rate. The corresponding Strouhal number declines with the increasing air mass flow rate. The power spectral density of the pressure fluctuation increases with a growth rate, f 5/3, in the low frequency range up to the slug frequency and then decays with a rate of f -5/2 up to 10 kHz. In plug flow regime a hump appears in the spectra between 100-500 Hz. This pattern is apparent downstream of the orifice.}, booktitle = {International {Conference} on {Multiphase} {Flow} ({ICMF} 2016)}, author = {{Lee, J. S} and {Violato, D} and {Polifke, W}}, month = may, year = {2016}, } @phdthesis{Carneiro11, type = {{PhD} {Thesis}}, title = {Development of a {Presumed} {Function} {Method} of {Moments} with {Application} to {Polydisperse} {Sprays}}, school = {TU München}, author = {Carneiro, Joao Neuenschwander Escosteguy}, year = {2011}, file = {Carneiro - 2011 - Development of a Presumed Function Method of Momen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9CPEZE4M\\Carneiro - 2011 - Development of a Presumed Function Method of Momen.pdf:application/pdf}, } @inproceedings{BlumeSubra13a, address = {Villa Vigoni, Menaggio, Italy}, title = {A {Time} {Domain} {Perspective} an the {Response} of {Premixed} {Flames} to {Flow} {Perturbations}}, booktitle = {{EUROMECH} {Colloquium} 546 – {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Blumenthal, R. S. and Subramanian, P. and Sujith, R. and Polifke, W.}, month = may, year = {2013}, } @inproceedings{PaschFlohr00, address = {Luzern, Switzerland}, series = {7th {Int}. {Conference} on {Flow}-{Induced} {Vibration}}, title = {Fluid {Dynamic} {Instabilities} in a {Swirl} {Stabilized} {Burner} and their {Effect} on {Heat} {Release} {Fluctuations}}, booktitle = {Proceedings of {Flow} {Induced} {Vibrations}}, publisher = {A.A. Balkema}, author = {Paschereit, C. O. and Flohr, P. and Polifke, W. and Bockholts, M.}, editor = {Ziada, Samir and Staubli, Thomas}, year = {2000}, keywords = {published, Swirl, Unrev'd}, annote = {The following values have no corresponding Zotero field:CY - Luceren, Switzerland}, file = {Paschereit et al_2000_Fluid Dynamic Instabilities in a Swirl Stabilized Burner and their Effect on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P8FHR652\\Paschereit et al_2000_Fluid Dynamic Instabilities in a Swirl Stabilized Burner and their Effect on.pdf:application/pdf}, } @inproceedings{UlhaqSilva15, address = {Budapest, Hungary}, title = {Identification of the dynamics of technically premixed flames as multiple-input, single-output systems from {LES}}, abstract = {If thermo-acoustic instabilities develop in a technically premixed combustion system, equivalence ratio fluctuations are likely to occur in addition to velocity fluctuations. Therefore, in this type of system, the unsteady heat release rate should be related not only to velocity perturbations upstream of the flame but also to fluctuations of the equivalence ratio. In the present work, the flame response to both velocity as well as equivalence ratio fluctuations is assessed through Large Eddy Simulation (LES). Considering the flame as a multiple-input, single-output(MISO) system, two transfer functions are deduced for a wide range of frequencies from a single LES run. Uncertainty quantification of system identification allows to compute confidence intervals for the flame transfer functions}, booktitle = {Proc. 7th {European} {Combustion} {Meeting}}, author = {Ulhaq, Ahtsham and Silva, Camilo F. and Polifke, Wolfgang}, month = mar, year = {2015}, file = {Ulhaq, Ahtsham et al_2015_Identification of the dynamics of technically premixed flames as.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H6TGDJWZ\\Ulhaq, Ahtsham et al_2015_Identification of the dynamics of technically premixed flames as.pdf:application/pdf}, } @incollection{CardePolif10, title = {Effects of temperature inhomogeneity on the damping characteristics of quarter wave resonator rings}, booktitle = {Sonderforschungsbereich/{Transregio} 40 -- {Annual} {Report}}, author = {Cárdenas Miranda, A. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2010}, pages = {41 -- 54}, file = {Càrdenas Miranda_Polifke_2010_Effects of temperature inhomogeneity on the damping characteristics of quarter.pdf:C\:\\Users\\niebl\\Zotero\\storage\\649S2MQ8\\Càrdenas Miranda_Polifke_2010_Effects of temperature inhomogeneity on the damping characteristics of quarter.pdf:application/pdf}, } @techreport{BrandPolif04a, title = {A novel turbulent finite rate combustion model for the auto-ignition regime - {Part} {I}: {Model} implementation in {FLUENT}}, institution = {ALSTOM Power}, author = {Brandt, M. and Polifke, W.}, year = {2004}, file = {Brandt_Polifke_2004_A novel turbulent finite rate combustion model for the auto-ignition regime -.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H5TCAK5R\\Brandt_Polifke_2004_A novel turbulent finite rate combustion model for the auto-ignition regime -.pdf:application/pdf}, } @incollection{FischPolif10, series = {{ISBN} 978-3-642-04548-6}, title = {Formulation and {Validation} of an {LES} {Model} for {Ternary} {Mixing} and {Reaction} {Based} on {Joint} {Presumed} {Discrete} {Distributions}}, booktitle = {Micro and {Macro} {Mixing} -- {Analysis}, {Simulation} and {Numerical} {Calculation}}, publisher = {Springer Verlag}, author = {Fischer, Frank Victor and Polifke, Wolfgang}, editor = {Bockhorn, Henning and Mewes, Dieter and Peukert, Wolfgang and Warnecke, Hans-Joachim}, year = {2010}, pages = {185--204}, file = {Fischer_Polifke_2010_Formulation and Validation of an LES Model for Ternary Mixing and Reaction.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JAHC2Q88\\Fischer_Polifke_2010_Formulation and Validation of an LES Model for Ternary Mixing and Reaction.pdf:application/pdf}, } @techreport{SujitPolif09, title = {Analysis and identification of local \& global nonlinearities in thermo-acoustic systems}, institution = {IITM / TUM}, author = {Sujith, R. I. and Polifke, W.}, month = oct, year = {2009}, file = {Sujith_Polifke_2009_ANALYSIS AND IDENTIFICATION OF LOCAL & GLOBAL NONLINEARITIES IN THERMO-ACOUSTIC.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BBKVC56M\\Sujith_Polifke_2009_ANALYSIS AND IDENTIFICATION OF LOCAL & GLOBAL NONLINEARITIES IN THERMO-ACOUSTIC.pdf:application/pdf}, } @phdthesis{Kaess10, type = {{PhD} {Thesis}}, title = {Thermoacoustic {Stability} {Analysis} from {Open} {Loop} {Transfer} {Functions} based on {LES}}, urldate = {2014-11-10}, school = {TU München}, author = {Kaess, Roland}, year = {2010}, keywords = {Stability, LES}, file = {Kaess_2010_Thermoacoustic Stability Analysis from Open Loop Transfer Functions based on LES.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4JPHF7D6\\Kaess_2010_Thermoacoustic Stability Analysis from Open Loop Transfer Functions based on LES.pdf:application/pdf;Kaess_An implicit factored scheme for the compressible Navier-Stokes equations.pdf:C\:\\Users\\niebl\\Zotero\\storage\\C86VI978\\Kaess_An implicit factored scheme for the compressible Navier-Stokes equations.pdf:application/pdf}, } @article{MarscHinri08, title = {Numerische {Simulation} von {Mehrphasenreaktoren} mittels hybridem {CFD}-{Modell} in {OpenFOAM} ({HIRES}-{TFM})}, volume = {80}, issn = {1522-2640}, url = {http://onlinelibrary.wiley.com/doi/10.1002/cite.200750548/abstract}, doi = {10.1002/cite.200750548}, language = {en}, number = {9}, urldate = {2017-03-05}, journal = {Chemie Ingenieur Technik}, author = {Marschall, H. and Hinrichsen, O. and Polifke, W.}, month = sep, year = {2008}, keywords = {Mehrphasen-CFD, Reaktordesign}, pages = {1303--1303}, file = {Marschall et al_2008_Numerische Simulation von Mehrphasenreaktoren mittels hybridem CFD-Modell in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QM3R43VI\\Marschall et al_2008_Numerische Simulation von Mehrphasenreaktoren mittels hybridem CFD-Modell in.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\GCCGENAP\\abstract.html:text/html}, } @article{AcherDems14, series = {4}, title = {A {Quadrature} {Method} of {Moments} for {Polydisperse} {Flow} in {Bubble} {Columns} {Including} {Poly}-celerity, {Breakup} and {Coalescence}}, volume = {6}, url = {http://dx.doi.org/10.1260/1757-482X.6.4.457}, doi = {10.1260/1757-482X.6.4.457}, abstract = {A simulation model for 3D polydisperse bubble column flows in an Eulerian/Eulerian framework is presented. A computationally efficient and numerically stable algorithm is created by making use of quadrature method of moments (QMOM) functionalities, in conjunction with appropriate breakup and coalescence models. To account for size dependent bubble motion, the constituent moments of the bubble size distribution function are transported with individual velocities. Validation of the simulation results against experimental and numerical data of Hansen [1] show the capability of the present model to accurately predict complex gas-liquid flows.}, number = {4}, urldate = {2015-01-19}, journal = {The Journal of Computational Multiphase Flows}, author = {Acher, Thomas and Dems, Patrick and Lenz, Stefan and Gobert, Christian and Polifke, Wolfgang}, month = dec, year = {2014}, pages = {457--474}, file = {Acher et al_2014_A quadrature method of moments for polydisperse flow in bubble columns.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BNRRTN34\\Acher et al_2014_A quadrature method of moments for polydisperse flow in bubble columns.pdf:application/pdf;MetaPress Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\3RVDFUJW\\3826219640212431.html:text/html}, } @phdthesis{Hassa11, type = {{PhD} {Thesis}}, title = {Experimental and {Numerical} {Analysis} of a {PCM}-{Supported} {Humidification}-{Dehumidification} {Solar} {Desalination} {System}}, school = {TU München}, author = {Hassabou, Abdel Hakim M. A.}, year = {2011}, file = {hassabou2011.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GHV6UP9Q\\hassabou2011.pdf:application/pdf}, } @inproceedings{Polif13, title = {Black-{Box} {System} {Identifikation} für die {Erstellung} reduzierter {Modelle}}, booktitle = {Garchinger {Seminare}}, publisher = {GRS}, author = {Polifke, W.}, month = sep, year = {2013}, } @incollection{FornePolif16, title = {Nonlinear {Aeroacoustic} {Identification} of the {Helmholtz} {Resonator} {Response} {Based} on a {Local} {Linear} {Neuro}-{Fuzzy} {Model}}, url = {http://www.sfbtr40.de/fileadmin/Annual-Reports/annualreport2016/Jahresbericht-2016-A3.pdf}, booktitle = {Annual {Report}}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Förner, K. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2016}, pages = {35--50}, file = {Förner and Polifke - 2016 - Nonlinear Aeroacoustic Identification of the Helmh.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XA6ZRV2Z\\Förner and Polifke - 2016 - Nonlinear Aeroacoustic Identification of the Helmh.pdf:application/pdf}, } @inproceedings{Polif11f, address = {Munich}, title = {Strategies for computational modelling of thermoacoustic instabilities}, booktitle = {Munich {Centre} of {Advanced} {Computing} - {Summer} {Workshop}}, publisher = {TU München}, author = {Polifke, W.}, month = jul, year = {2011}, } @inproceedings{forner_streuung_2015, address = {Braunschweig, Germany}, title = {Streuung in höhere {Harmonische} bei akustischen {Resonatoren}}, url = {http://www.dglr.de/fileadmin/inhalte/dglr/fb/q2/workshop-q23-braunschweig-2015/Session4/DGLRWorkshop_2015_Foerner_Stroemungsschall.pdf}, booktitle = {{DGLR}/{DEGA}-{Workshop} {Strömungsschall}}, author = {Förner, Kilian and Polifke, Wolfgang}, year = {2015}, file = {Abstract.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XXWQJHJM\\Abstract.pdf:application/pdf;Förner - 2015 - Streuung in höhere Harmonische bei akustischen Res.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2BKV3K2C\\Förner - 2015 - Streuung in höhere Harmonische bei akustischen Res.pdf:application/pdf}, } @inproceedings{MondaMukho14, address = {New Delhi, India}, series = {{GTINDIA2014}-8306}, title = {Characterization of {Mixing} and {Flow} {Properties} {From} {Numerical} {Simulation} of {Cold} {Flow} in {Non}-{Premixed} {Combustor}}, booktitle = {Proceedings of {ASME} 2014 {Gas} {Turbine} {India} {Conference}}, author = {Mondal, S. and Mukhopadhyay, A. and Sen, S. and Polifke, W.}, month = dec, year = {2014}, file = {Mondal et al_2014_Characterization of Mixing and Flow Properties From Numerical Simulation of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8XCESN49\\Mondal et al_2014_Characterization of Mixing and Flow Properties From Numerical Simulation of.pdf:application/pdf}, } @inproceedings{CarneKaufm09a, address = {Gramado, RS, Brazil}, title = {Numerical {Simulation} of {Droplet} {Dispersion} and {Evaporation} with a {Moments}-based {CFD} {Model}}, booktitle = {{COBEM} 2009 - 20th {International} {Congress} of {Mechanical} {Engineering}}, author = {Carneiro, J. N. E. and Kaufmann, V. and Polifke, W.}, month = nov, year = {2009}, file = {Carneiro et al_2009_Numerical Simulation of Droplet Dispersion and Evaporation with a Moments-based.pdf:C\:\\Users\\niebl\\Zotero\\storage\\V8HFNFQX\\Carneiro et al_2009_Numerical Simulation of Droplet Dispersion and Evaporation with a Moments-based.pdf:application/pdf}, } @inproceedings{DobbeKnopf94, address = {Birmingham, UK}, series = {{ASME} 94-{GT}-394}, title = {Low {NOx} {Premixed} {Combustion} of {MBTU} {Fuels} {Using} the {ABB} {Double} {Cone} {Burner} ({EV} {Burner})}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, author = {Döbbeling, K and Knöpfel, H P and Polifke, W and Winkler, D and Steinbach, C and Sattelmayer, T}, year = {1994}, keywords = {Combustion, MediaTUM, Premixed flame, Emissions, Rev'd}, file = {Döbbeling et al_1994_Low NOsubx-sub Premixed Combustion of MBTU Fuels Using the ABB Double Cone.pdf:C\:\\Users\\niebl\\Zotero\\storage\\65TIN5JQ\\Döbbeling et al_1994_Low NOsubx-sub Premixed Combustion of MBTU Fuels Using the ABB Double Cone.pdf:application/pdf}, } @article{PolifPasch98, title = {Determination of {Thermo}-{Acoustic} {Transfer} {Matrices} by {Experiment} and {Computational} {Fluid} {Dynamics}}, volume = {38}, journal = {ERCOFTAC Bulletin}, author = {Polifke, W and Paschereit, C O}, month = sep, year = {1998}, keywords = {Combustion, Thermoacoustics, Acoustics, Pulsation, Frequency response, Invt'd}, file = {Polifke_Paschereit_1998_Determination of thermo-acoustic transfer matrices by experiment and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R4BI73GD\\Polifke_Paschereit_1998_Determination of thermo-acoustic transfer matrices by experiment and.pdf:application/pdf}, } @phdthesis{Witte11, address = {Garching}, type = {Diplomarbeit}, title = {One-{Dimensional} {Modelling} of the {Thermoacoustic} {Effect} {Considering} {Mean} {Flow}}, school = {Technische Universität München}, author = {Baumgartner, Armin}, month = nov, year = {2011}, file = {Report.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KGWJSU5K\\Report.pdf:application/pdf}, } @inproceedings{FischPolif09, address = {Fulda, Germany}, title = {Modelling and validation of an {LES} model for ternary mixing based on joint probability discrete distributions using mixing models}, booktitle = {{ProcessNet} {Jahrestreffen} der {Fachausschüsse} {Computational} {Fluid} {Dynamics}, {Mischvorgänge} und {Extraktion}}, publisher = {DECHEMA}, author = {Fischer, V. and Polifke, W.}, month = mar, year = {2009}, } @inproceedings{BollwKaufm07, address = {Leipzig, Germany}, title = {Derivation and {Application} of a {Poly}-{Celerid} {Method} for {Poly}-{Dispersed} {Two}-{Phase} {Flows}}, abstract = {When simulating poly-dispersed two-phase flows in an Eulerian framework (multi-fluid approach), in general one full set of momentum equation has to be solved for each particle size group. In the present paper an approach is proposed which describes the transport of a particle size group with its individual, size-dependent velocity in an approximate manner without solving the corresponding set of momentum equations. Instead, the particle volume fraction is transported as a passive scalar, with a source term that is introduced to account for the difference in velocity between carrier and dispersed phase. The approach is formulated for particles accelerated by viscous drag due to velocity differences with respect to the carrier phase.}, booktitle = {{ICMF} 2007 - {Int}. {Conf}. on {Multiphase} {Flow}}, author = {Bollweg, Peter and Kaufmann, Andrë and Polifke, Wolfgang}, year = {2007}, keywords = {CFD}, annote = {The following values have no corresponding Zotero field:JF - 6th International Conference on Multiphase Flow}, file = {Bollweg et al_2007_Derivation and Application of a Poly-Celerid Method for Poly-Dispersed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XUVJDCWV\\Bollweg et al_2007_Derivation and Application of a Poly-Celerid Method for Poly-Dispersed.pdf:application/pdf}, } @phdthesis{Dehn16, address = {Garching, Germany}, title = {Numerisch-akustische {Untersuchung} von {Blasenschwingungen} in zweiphasigen {Blendenströmungen}}, school = {TU München}, author = {{Dehn, Felix}}, month = feb, year = {2016}, note = {Betreuerin: Lee, Joohwa Sarah}, file = {Dehn, Felix_2016_Numerisch-akustische Untersuchung von Blasenschwingungen in zweiphasigen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6AW3CNXP\\Dehn, Felix_2016_Numerisch-akustische Untersuchung von Blasenschwingungen in zweiphasigen.pdf:application/pdf}, } @inproceedings{Polif12b, address = {Erlangen, Germany}, title = {Thermoakustische {Verbrennungungsinstabilitäten}}, booktitle = {Kurzlehrgang {Verbrennung}}, publisher = {LTT Erlangen}, author = {Polifke, W.}, month = mar, year = {2012}, } @inproceedings{FischSchwe06, address = {Grenada, Spain}, title = {Statistical {Distributions} of {Mixture} {Fractions} {Observed} in {DNS} of {Turbulent} {Ternary} {Mixing}}, booktitle = {11th {Int}. {Conf}. on {Numerical} {Combustion}}, publisher = {SIAM}, author = {Fischer, Victor and Schwertfirm, Florian and Manhart, Michael and Polifke, Wolfgang}, year = {2006}, } @inproceedings{PolifPasch99, address = {Copenhagen, Denmark}, title = {Suppression of {Combustion} {Instabilities} through {Destructive} {Interference} of {Acoustic} and {Entropy} {Waves}}, booktitle = {6th. {Int}. {Conf}. on {Sound} and {Vibration}}, author = {Polifke, W. and Paschereit, C. O. and Döbbeling, K.}, year = {1999}, keywords = {Unrev'd}, pages = {3319--3330}, file = {Polifke et al_1999_Suppression of Combustion Instabilities through Destructive Interference of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3ZZWHHII\\Polifke et al_1999_Suppression of Combustion Instabilities through Destructive Interference of.pdf:application/pdf}, } @inproceedings{PankiEvesq02, address = {Stuttgart}, title = {Stabilitätsanalyse der {Verbrennung} in {Gasturbinen} unter {Anwendung} von modalen {Ansätzen} und {Finite}-{Element}-{Methoden}}, booktitle = {{DGLR}-{Fachsymposium} ''{Berechnungsverfahren} für {Brennkammerströmungen} in {Raketen}- und {Gasturbinenbrenkammern}''}, publisher = {DLR}, author = {Pankiewitz, C and Evesque, S and Polifke, W and Sattelmayer, T}, month = jan, year = {2002}, keywords = {Stability, Thermoacoustics, Premixed flame, Simulation + Modelling, Unrev'd}, file = {Pankiewitz et al_2002_Stabilitätsanalyse der Verbrennung in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SLV2XUXW\\Pankiewitz et al_2002_Stabilitätsanalyse der Verbrennung in.pdf:application/pdf}, } @phdthesis{Maier16, address = {München, Germany}, type = {Bachelor's {Thesis}}, title = {Analytical and {Numerical} {Evaluation} of the {Impedance}’s {Impact} on the {Acoustic} {Mode} {Shapes}}, url = {https://mediatum.ub.tum.de/1319700}, school = {TUM}, author = {Maier, Lukas}, year = {2016}, note = {Betreuer: Förner}, file = {Maier - 2016 - Analytical and Numerical Evaluation of the Impedan.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BUFF46UX\\Maier - 2016 - Analytical and Numerical Evaluation of the Impedan.pdf:application/pdf}, } @inproceedings{Polif97, address = {Zürich, Switzerland}, title = {Exploiting {Radial} {Pressure} {Balance} for the {Prediction} of {Swirling} {Flows}}, booktitle = {4th {CFD} {Day}}, author = {Polifke, W.}, year = {1997}, keywords = {Swirl, Unrev'd}, file = {Polifke_1997_Exploiting Radial Pressure Balance for the Prediction of Swirling Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ASX26K3C\\Polifke_1997_Exploiting Radial Pressure Balance for the Prediction of Swirling Flows.pdf:application/pdf}, } @phdthesis{Thoma16, address = {München, Germany}, type = {Semester {Thesis}}, title = {Modellordnungsreduktion von gekoppelten thermoakustischen {Problemen}}, school = {TUM}, author = {Thomann, Felix}, month = dec, year = {2016}, note = {Supervisors: Castagnotto (RT), Cruz (RT), Meindl (TFD)}, file = {Dokumentation_Semesterarbeit_Thomann.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WVBAZMWF\\Dokumentation_Semesterarbeit_Thomann.pdf:application/pdf}, } @article{BrandPolif06, series = {4}, title = {Approximation of joint {PDFs} by discrete distributions generated with {Monte}-{Carlo} methods}, volume = {10}, journal = {Combust. Theory and Modelling}, author = {Brandt, M. and Polifke, W. and Flohr, P.}, month = aug, year = {2006}, pages = {535 -- 558}, file = {Brandt et al_2006_Approximation of joint PDFs by discrete distributions generated with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8P6KBIB9\\Brandt et al_2006_Approximation of joint PDFs by discrete distributions generated with.pdf:application/pdf}, } @phdthesis{Polif90, address = {New York, U. S. A.}, type = {{PhD} {Thesis}}, title = {Aspects of {Helicity} in {Turbulence}}, url = {http://www.scribd.com/doc/101415759}, school = {City University of New York}, author = {Polifke, W.}, year = {1990}, keywords = {Rev'd}, file = {Polifke_1990_Aspects of Helicity in Turbulence.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9AADU92A\\Polifke_1990_Aspects of Helicity in Turbulence.pdf:application/pdf}, } @inproceedings{CarneKaufm08a, address = {Milano, Italy}, title = {Development of a {CFD}-based {Moments} {Model} for {Polydispersed} {Multiphase} {Flows}}, booktitle = {2nd {OpenFOAM} {Workshop}}, author = {Carneiro, J. N. E. and Kaufmann, V. and Polifke, W.}, month = jul, year = {2008}, file = {Carneiro et al_2008_Development of a CFD-based Moments Model for Polydispersed Multiphase Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P7DI8B2I\\Carneiro et al_2008_Development of a CFD-based Moments Model for Polydispersed Multiphase Flows.pdf:application/pdf}, } @inproceedings{DemsPolif13, title = {{BY} 14 {GV}: {Flammendynamik} bei der {Verbrennung} von {Flüssigbrennstoffen}}, booktitle = {Abschlussbericht {Forschungsinitiative} ''{Kraftwerke} des 21. {Jahrhunderts} ({KW21})''}, author = {Dems, P. and Polifke, W.}, editor = {Sattelmayer, T. and Aigner, M.}, month = oct, year = {2013}, pages = {770--791}, file = {Dems+Polif13.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3FSQWPZB\\Dems+Polif13.pdf:application/pdf;Dems+Polif13.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W4PGD9AM\\Dems+Polif13.pdf:application/pdf}, } @inproceedings{TournForne16a, address = {Lyon, France}, title = {Determination of {Acoustic} {Impedance} for {Helmholtz} {Resonators} {Through} {Incompressible} {Unsteady} {Flow} {Simulations}}, url = {http://dx.doi.org/10.2514/6.2016-2917}, doi = {10.2514/6.2016-2917}, booktitle = {22nd {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, author = {Tournadre, J. and Förner, K. and Polifke, W. and Martínez-Lera, P. and Desmet, W.}, month = may, year = {2016}, file = {Tournadre et al. - 2016 - Determination of acoustic impedance for Helmholtz .pdf:C\:\\Users\\niebl\\Zotero\\storage\\WNNMUZAP\\Tournadre et al. - 2016 - Determination of acoustic impedance for Helmholtz .pdf:application/pdf}, } @inproceedings{DemsPolif11, address = {Riga}, title = {Modeling {Strategies} and {Implementation} {Challenges} of {Moment} {Methods} for the {Simulation} of {Polydisperse} {Two}-{Phase} {Flows}}, booktitle = {Multiphysical modelling in {OpenFOAM}}, author = {Dems, Patrick and Polifke, Wolfgang}, month = oct, year = {2011}, } @inproceedings{FollePolif10a, address = {Stockholm}, series = {{AIAA}-2010-3998}, title = {Determination of {Acoustic} {Transfer} {Matrices} via {Large} {Eddy} {Simulation} and {System} {Identification}}, booktitle = {16th {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, author = {Föller, S. and Polifke, W.}, year = {2010}, keywords = {Low order model, Acoustics, Frequency response}, file = {Föller_Polifke_2010_Determination of Acoustic Transfer Matrices via Large Eddy Simulation and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8GHM4BIH\\Föller_Polifke_2010_Determination of Acoustic Transfer Matrices via Large Eddy Simulation and.pdf:application/pdf}, } @incollection{KomarPolif09a, title = {Abschlussbericht 2008 {Forschungsinitiative} ''{Kraftwerke} des 21. {Jahrhunderts} ({KW21})''}, author = {Komarek, T. and Polifke, W.}, editor = {Weiss, G. and Meier, W.}, year = {2009}, pages = {704--723}, file = {Komarek_Polifke_2009_Abschlussbericht 2008 Forschungsinitiative ''Kraftwerke des 21.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5PBGX4KN\\Komarek_Polifke_2009_Abschlussbericht 2008 Forschungsinitiative ''Kraftwerke des 21.pdf:application/pdf}, } @article{Polif14b, title = {{IJSCD} {Special} {Issues} - {Editorial}}, volume = {6}, url = {http://scd.sagepub.com/content/6/3/i.full.pdf+html}, doi = {10.1260/1756-8277.6.3.i}, number = {1}, journal = {Int. J. Spray Comb. Dynamics}, author = {Polifke, W.}, year = {2014}, pages = {i--iii}, file = {Polifke_2014_IJSCD Special Issues - Editorial.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R9IS4928\\Polifke_2014_IJSCD Special Issues - Editorial.pdf:application/pdf}, } @article{MartiSchra09, title = {Identification of the aeroacoustic response of a low {Mach} number flow through a {T}-joint}, volume = {126}, doi = {10.1121/1.3159604}, number = {2}, journal = {The Journal of the Acoustical Society of America}, author = {Martínez-Lera, P and Schram, C and Föller, S and Kaess, R and Polifke, W}, month = aug, year = {2009}, pages = {582--586}, file = {Mart'inez-Lera et al_2009_Identification of the aeroacoustic response of a low Mach number flow through a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2ZREQ38Q\\Mart'inez-Lera et al_2009_Identification of the aeroacoustic response of a low Mach number flow through a.pdf:application/pdf}, } @inproceedings{PaggiPolif04a, address = {Leipzig}, title = {Cryo-adsorptive {Hydrogen} {Storage} in {Activated} {Carbon}}, booktitle = {Interne {Arbeitssitzung} {DECHEMA}-{GVC} ''{Adsorption}''}, publisher = {GVC}, author = {Paggiaro, R. and Polifke, W. and Michl, F. and Schütz, W. and Bénard, P.}, month = apr, year = {2004}, keywords = {Simulation + Modelling, thermodynamics, Ad-Ab-De-Sorption}, file = {Paggiaro et al_2004_Cryo-adsorptive Hydrogen Storage in Activated Carbon.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TN6D7CHV\\Paggiaro et al_2004_Cryo-adsorptive Hydrogen Storage in Activated Carbon.pdf:application/pdf}, } @inproceedings{Polif10b, address = {Erlangen, Germany}, title = {Thermoakustische {Verbrennungungsinstabilitäten}}, booktitle = {Kurzlehrgang {Verbrennung}}, publisher = {LTT Erlangen}, author = {Polifke, W.}, month = mar, year = {2010}, } @phdthesis{Mayr16, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Numerische {Untersuchung} von {Helmholtz}-{Resonatoren} mit {Spülströmung}}, language = {German}, school = {TU München}, author = {Mayr, Johannes}, year = {2016}, note = {Betreuer: Förner}, file = {mayrHelmholtzSpülströmung.pdf:C\:\\Users\\niebl\\Zotero\\storage\\N3FFX45G\\mayrHelmholtzSpülströmung.pdf:application/pdf}, } @inproceedings{Polif05b, address = {Stuttgart}, title = {Divide et {Impera} -- {Kombinierter} {Einsatz} von {CFD}, {Systemidentifikation} und linearen {Systemmodellen} zur {Analyse} thermo-akustischer {Verbrennungsinstabilitäten}}, booktitle = {Technologietag {ERCOFTAC} {Süddeutschland}}, author = {Polifke, W.}, month = sep, year = {2005}, } @article{HolziBaumg15, title = {A quasi-one-dimensional model of thermoacoustics in the presence of mean flow}, volume = {335}, issn = {0022-460X}, url = {http://www.sciencedirect.com/science/article/pii/S0022460X1400577X}, doi = {10.1016/j.jsv.2014.07.003}, abstract = {In thermoacoustic regenerators, the interaction of thermo-viscous boundary layers and axial temperature gradients causes a conversion from thermal energy to acoustic power or vice versa. In this paper, an improved analytical model for thermoacoustic boundary layer effects in the presence of mean flow is derived and analyzed. Previous formulations of the thermo-acoustic effect take into account effects of mean flow on acoustic propagation only implicitly, i.e. in as much as mean flow influences the mean temperature field. The new model, however, includes additional terms in the perturbation equations, which describe explicitly the interaction between steady mean flow and acoustics. For a parallel plate pore the three-dimensional thermoacoustic equations are derived and reduced to a transversally averaged system of differential equations by applying Green׳s function technique and suitable assumptions. The resulting one-dimensional perturbation equations are then solved numerically for two sets of boundary conditions to obtain the linear scattering matrix coefficients. The solutions, generated for a wide range of frequencies, can be applied in a low-order “network model” context to study the stability of thermoacoustic devices. The impact of mean flow on the thermoacoustic interaction is investigated and validated against full computational fluid dynamics simulations of laminar, compressible flow for one specific configuration. It is shown that at low frequencies (Womersley number \< 1 ) the new formulation predicts the acoustic behavior more accurately than the earlier formulations. Finally, the ideas and benefit of further improved and more complex models for higher Mach numbers are discussed.}, urldate = {2014-11-18}, journal = {J. Sound Vibration}, author = {Holzinger, Tobias and Baumgartner, Armin and Polifke, Wolfgang}, month = jan, year = {2015}, pages = {204--228}, file = {Holzinger et al_2015_A quasi-one-dimensional model of thermoacoustics in the presence of mean flow.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WK2R6PNP\\Holzinger et al_2015_A quasi-one-dimensional model of thermoacoustics in the presence of mean flow.pdf:application/pdf;ScienceDirect Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\C23ZGECH\\S0022460X1400577X.html:text/html}, } @inproceedings{BettePolif97, title = {Comparison of {Combustion} {Models} for {Lean} {Premixed} {Gas} {Turbine} {Combustion}}, volume = {4}, booktitle = {Combustion {Technologies} for a {Clean} {Environment}}, publisher = {Gordon and Breach Science Publishers Ltd.}, author = {Bettelini, M. and Polifke, W. and Geng, W. and Müller, U. C. and Weisenstein, W. and Döbbeling, K.}, year = {1997}, keywords = {Turbulence, Simulation + Modelling, Rev'd}, } @phdthesis{Gonza16, address = {Garching}, type = {Bachelor's {Thesis}}, title = {Investigations of the {Edge} {Geometry} {Influence} on the {Transfer} {Function} of {Laminar} {Premixed} {Flames}}, school = {Technische Universität München}, author = {Gonzales Moreno, Abres Jesus}, year = {2016}, note = {Betreuer. Steinbacher}, file = {Gonzales Moreno - 2016 - Investigations of the Edge Geometry Influence on t.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7U2BNJZP\\Gonzales Moreno - 2016 - Investigations of the Edge Geometry Influence on t.pdf:application/pdf}, } @article{MulleHerma16a, title = {Direct drive valve model for use as an acoustic source in a network model}, volume = {21}, url = {http://iiav.org/ijav/content/volumes/21_2016_590031458046128/vol_4/929_fullpaper_1541691482507021.pdf}, doi = {https://dx.doi.org/10.20855/ijav.2016.21.4435}, number = {4}, journal = {Int'l J. Acoustics \& Vibration}, author = {Müller, Roel A. J. and Hermann, Jakob and Polifke, Wolfgang}, year = {2016}, pages = {406--417}, file = {Müller et al. - 2016 - Direct drive valve model for use as an acoustic so.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z6H9GSTC\\Müller et al. - 2016 - Direct drive valve model for use as an acoustic so.pdf:application/pdf}, } @inproceedings{Polif11h, address = {Toulouse}, title = {A low-order thermoacoustic model for annular combustors with plenum-combustor and modal coupling}, booktitle = {Azimuthal modes in annular chambers}, publisher = {CERFACS}, author = {Polifke, W.}, month = nov, year = {2011}, } @article{PolifShtil89, series = {12}, title = {The {Dynamics} of {Helical} {Decaying} {Turbulence}}, volume = {1}, journal = {Phys. of Fluids A}, author = {Polifke, W. and Shtilman, L.}, year = {1989}, keywords = {Turbulence, Simulation + Modelling, Rev'd, Helicity}, pages = {2025--2033}, file = {Polifke_Shtilman_1989_The Dynamics of Helical Decaying Turbulence.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HMVIEX4T\\Polifke_Shtilman_1989_The Dynamics of Helical Decaying Turbulence.pdf:application/pdf}, } @inproceedings{KulkaZellh11, address = {Cardiff, UK}, title = {{LES} {Based} {Investigation} of {Autoignition} in {Turbulent} {Co}-flow {Configurations}}, booktitle = {European {Combustion} {Meeting} 2011}, publisher = {British Section of the Combustion Institute}, author = {Kulkarni, R. and Zellhuber, M. and Polifke, W.}, month = jul, year = {2011}, file = {Kulkarni et al_2011_LES Based Investigation of Autoignition in Turbulent Co-flow Configurations.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UK9GUBFG\\Kulkarni et al_2011_LES Based Investigation of Autoignition in Turbulent Co-flow Configurations.pdf:application/pdf}, } @inproceedings{KulkaCollo11, address = {Cardiff, UK}, title = {Validation of the {Progress} {Variable} {Tabulation} {Approach} for the {Auto}-ignition {Simulation}}, booktitle = {{COST} {CM} 0901 -- 1st {Topical} {Workshop}: {Methods} for model simplification, evaluation and improvement}, publisher = {COST (European Cooperation in Science and Technology}, author = {Kulkarni, R. and Collonval, F. and Polifke, W.}, month = jun, year = {2011}, keywords = {Auto-ignition, Chemistry tabulation, progress variable}, } @inproceedings{Polif05c, address = {Toulouse, Frankreich}, title = {Flame / acoustics coupling and combustion instabilities}, booktitle = {Large {Eddy} {Simulation} and {Acoustic} {Analysis} {Tools} for {Unsteady} {Combustion}}, publisher = {CERFACS / FLUISTCOM}, author = {Polifke, W.}, month = may, year = {2005}, } @article{SelimSujit09, series = {1}, title = {Identification of {Heat} {Transfer} {Dynamics} for {Nonmodal} {Stability} {Analysis} of {Thermoacoustic} {Systems}}, volume = {1168}, url = {http://link.aip.org/link/?APC/1168/605/1}, doi = {10.1063/1.3241535}, journal = {Numerical Analysis and Applied Mathematics (AIP Conference Proceedings)}, author = {Selimefendigil, F. and Sujith, R. I. and Polifke, W.}, editor = {Simos, Theodore E. and Psihoyios, George and Tsitouras, Ch}, year = {2009}, keywords = {CFD, Heat transfer, Galerkin method}, pages = {605--608}, } @inproceedings{PieriBrand03a, address = {Cottbus, D}, title = {Anwendung von {Modellen} der turbulenten {Flammengeschwindigkeit} auf einen vorgemischten {Strahlbrenner}}, booktitle = {21. {Deutscher} {Flammentag}}, author = {Pieringer, J. and Brandt, M. and Polifke, W. and Griebel, P. and Siewert, P. and R, Dr Bombach and Inauen, A. and Kreutner, W.}, month = sep, year = {2003}, keywords = {Combustion, MediaTUM, Turbulence, Premixed flame}, pages = {629--634}, annote = {The following values have no corresponding Zotero field:PB - VDICY - 21. Flammentag Cottbus}, file = {Pieringer et al_2003_Anwendung von Modellen der turbulenten Flammengeschwindigkeit auf einen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RVUSUNRF\\Pieringer et al_2003_Anwendung von Modellen der turbulenten Flammengeschwindigkeit auf einen.pdf:application/pdf}, } @inproceedings{Polif01, address = {Hamburg}, title = {Theoretical {Description} of {Combustion} {Instabilities}}, booktitle = {{HDT} {Fachveranstaltung} {emVerbrennungsschwingungen} - {Thermoakustik}}, publisher = {Haus der Technik}, author = {Polifke, W.}, month = nov, year = {2001}, keywords = {Thermoacoustics, Simulation + Modelling, Invt'd}, annote = {The following values have no corresponding Zotero field:CY - Hamburg}, file = {Polifke_2001_Theoretical Description of Combustion Instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XBU7T4VX\\Polifke_2001_Theoretical Description of Combustion Instabilities.pdf:application/pdf}, } @inproceedings{AcherDems13, address = {Jeju, Korea}, title = {Validation of a quadrature method of moments for polydisperse flow in bubble columns including poly-celerity, breakup and coalescence}, booktitle = {8th {Int}. {Conf}. on {Multiphase} {Flows}, {ICMF} 2013}, author = {Acher, T. and Dems, P. and Lenz, S. and Gobert, C. and Polifke, W.}, month = may, year = {2013}, file = {Acher et al_2013_Validation of a quadrature method of moments for polydisperse flow in bubble.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MUS4RBPA\\Acher et al_2013_Validation of a quadrature method of moments for polydisperse flow in bubble.pdf:application/pdf}, } @phdthesis{Hege17, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Numerische {Parameterstudie} einer {Konfiguration} zur kombinierten {Prall}- und {Effusionskühlung}}, url = {https://mediatum.ub.tum.de/603844?query=f%C3%B6rner&show_id=1346255}, language = {German}, school = {TU München}, author = {Hege, Lukas}, year = {2017}, note = {Betreuer: Förner}, file = {Hege - 2017 - Numerische Parameterstudie einer Konfiguration zur.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WWKCMCKH\\Hege - 2017 - Numerische Parameterstudie einer Konfiguration zur.pdf:application/pdf}, } @article{HassaSpinn13, title = {Tecnoeconomic {Analysis} of {Medium} and {Large}-sacle {Desalination} {Plants} {Driven} by {Concentrated} {Solar} {Systems} in the {Mena} {Region}}, volume = {42}, issn = {1876-6102}, url = {http://www.sciencedirect.com/science/article/pii/S1876610213017785}, doi = {http://dx.doi.org/10.1016/j.egypro.2013.11.076}, journal = {Energy Procedia}, author = {Hassabou, Abdel Hakim and Spinnler, Markus and Polifke, Wolfgang}, year = {2013}, pages = {735 -- 744}, file = {Hassabou et al_2013_Tecnoeconomic Analysis of Medium and Large-sacle Desalination Plants Driven by.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MKM3Q89U\\Hassabou et al_2013_Tecnoeconomic Analysis of Medium and Large-sacle Desalination Plants Driven by.pdf:application/pdf}, } @patent{SchueMichl06, title = {Storage {System} for {Storing} a {Medium} and {Method} for {Loading} a {Storage} {System} with a {Storage} {Medium} and {Emptying} the {Same} {Therefrom}}, author = {Schuetz, W. and Michl, F. and Polifke, W. and Paggiaro, R.}, month = jul, year = {2006}, } @article{LauerZellh11, title = {Determination of the heat release distribution in turbulent flames by a model based correction of {OH}* chemiluminescence}, volume = {133}, number = {12}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Lauer, Martin and Zellhuber, Mathieu and Sattelmayer, Thomas and Aul, Christopher J}, year = {2011}, pages = {121501}, file = {Lauer et al_2011_Determination of the heat release.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NTKFN97J\\Lauer et al_2011_Determination of the heat release.pdf:application/pdf}, } @inproceedings{StrobWitte15, address = {Florence, Italy}, title = {Thermo-acoustic characterization of a heat exchanger in cross flow using compressible and weakly compressible numerical simulation}, abstract = {In the present work, a heat exchanger as used for hot water supply in domestic boilers is investigated numerically. The objective of the study is to identify the frequency response of the heat transfer rate with respect to perturbations of flow velocity, and the acoustic scattering matrix of the heat exchanger. These response functions are determined by CFD simulation of flow with heat transfer combined with system identification. Unsteadiness is imposed on the simulations by broad-band excitation of the variables at the boundaries. The resulting time series are post-processed to obtain the frequency responses. Particular emphasis is placed on the comparability between compressible and weakly compressible simulations in terms of heat release response. The response functions may be used subsequently in thermo-acoustic stability analysis of combustion systems.}, booktitle = {The 22nd {International} {Congress} of {Sound} and {Vibration}}, author = {Strobio Chen, Lin and Witte, Armin and Polifke, Wolfgang}, month = jul, year = {2015}, keywords = {published, MediaTUM, tango}, file = {Strob+Witte+15_v1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T8B3VU7R\\Strob+Witte+15_v1.pdf:application/pdf}, } @inproceedings{JasorWacke11, address = {Berlin, Germany}, title = {Application of {Quadrature} {Method} of {Moments} for {Sedimentation} and {Coagulation} of {Raindrops}}, booktitle = {{METSTROEM} {Symposium}}, author = {Jasor, Gary and Wacker, Ulrike and Beheng, Klaus and Polifke, Wolfgang}, month = jun, year = {2011}, } @inproceedings{KieftErogl95a, address = {TU Delft, NL}, title = {The {Influence} of {Mixture} {Fraction} {Fluctuations} on {NOx} {Formation} in {Lean}, {Imperfectly} {Premixed} {Combustion}}, booktitle = {Euromech {Colloquium} 340, {Statistical} {Properties} of {Turbulent} {Gaseous} {Flames}}, author = {Kieftenburg, A. and Eroglu, A. and Polifke, W.}, year = {1995}, keywords = {Emissions, Simulation + Modelling, Unrev'd}, } @book{JoosNi02, title = {Burner with damper for attenuating thermo acoustic instabilities}, url = {https://www.google.com/patents/US6490864}, publisher = {Google Patents}, author = {Joos, F. and Ni, A. and Polifke, W.}, month = dec, year = {2002}, note = {US Patent 6,490,864}, file = {Joos et al_2002_Burner with damper for attenuating thermo acoustic instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VUAZ39U3\\Joos et al_2002_Burner with damper for attenuating thermo acoustic instabilities.pdf:application/pdf}, } @inproceedings{KomarPolif07, title = {Reconstruction of premixed flame dynamics by transient {CFD} and system identification.}, booktitle = {2nd {GACM} {Colloquim} on {Computational} {Mechanics}}, publisher = {2nd GACM Colloquim on Computational Mechanics, 10.-12. October, Munich, Germany}, author = {Komarek, Thomas and Polifke, Wolfgang}, year = {2007}, keywords = {Flame transfer function, CFD, System identification, CFD SI, WHI, Flame transfer matrix}, } @inproceedings{PolifLevic90, address = {Cambridge, UK}, title = {The {Entangledness} of {Vortex} {Lines} in {Turbulent} {Flow}}, booktitle = {Proceedings of the {IUTAM} {Symposium} on ''{Topological} {Fluid} {Mechanics}''}, publisher = {Cambridge University Press.}, author = {Polifke, W. and Levich, E.}, year = {1990}, keywords = {Turbulence, Rev'd, Helicity}, } @inproceedings{DuranPolif04a, address = {Heidelberg}, title = {Implementation and validation of models for premixed turbulent combustion in a {LES}/{DNS} solver}, booktitle = {{SFB} 568-{Workshop}}, author = {Durand, L. and Polifke, W. and Rieger, D. and Yan, J. and Sesterhenn, J.}, year = {2004}, keywords = {Combustion, Numerical Methods, LES}, file = {Durand et al_2004_Implementation and validation of models for premixed turbulent combustion in a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\N6TJ8WVJ\\Durand et al_2004_Implementation and validation of models for premixed turbulent combustion in a.pdf:application/pdf}, } @inproceedings{Evesq02.low-order, address = {Stavanger, Norway}, title = {Low-order model of combustion instabilities in annular combustors}, booktitle = {9th {Energy} {Programme} {Marie} {Curie} {Research} {Fellowship} {Conference}}, author = {Evesque, S.}, month = may, year = {2002}, } @inproceedings{MartiSchra10, address = {Munich, Germany}, title = {Identification of the aeroacoustic response of ducted low {Mach} number flows}, booktitle = {n3l -- {Non}-{Normal} and {Nonlinear} {Effects} in {Aero}- and {Thermoacoustics}}, publisher = {TU München}, author = {Martínez-Lera, Paula and Schram, Christophe and Föller, S. and Kaess, R. and Polifke, W.}, month = may, year = {2010}, keywords = {Acoustics, nonlinear}, file = {Martinez-Lera et al_2010_Identification of the aeroacoustic response of ducted low Mach number flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\83TH8VRN\\Martinez-Lera et al_2010_Identification of the aeroacoustic response of ducted low Mach number flows.pdf:application/pdf}, } @inproceedings{LeePolif14, title = {Untersuchung von {Geräuschquellen} im {Fahrzeug}- {Kältekreislauf}}, booktitle = {{DEGA} {Workshop} {Fahrzeugakustik}/{Strömungsakustik}}, publisher = {DEGA}, author = {Lee, J. S. and Polifke, W}, year = {2014}, } @inproceedings{LacomMouss10, address = {Cairo, Egypt}, title = {Experimental and {Numerical} {Investigations} on the {Whistling} {Ability} of an {Orifice} in a {Flow} {Duct}}, booktitle = {17th {Int}'l. {Congress} on {Sound} and {Vibration}}, publisher = {Int'l Inst. of Acoustics and Vibration}, author = {Lacombe, R. and Moussou, P. and Föller, S. and Jasor, G. and Polifke, W. and Aurégan, Y.}, month = jul, year = {2010}, keywords = {Acoustics, Frequency response}, file = {Lacombe et al_2010_Experimental and Numerical Investigations on the Whistling Ability of an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XGVX5IJT\\Lacombe et al_2010_Experimental and Numerical Investigations on the Whistling Ability of an.pdf:application/pdf}, } @article{EvesqDowli03, title = {Self-tuning regulators for combustion oscillations.}, volume = {459}, number = {2035}, journal = {Royal Society's Journal:Math.,Phys.{\textbackslash}\&Eng. Sciences}, author = {Evesque, S and Dowling, A P and Annaswamy, A M}, year = {2003}, pages = {1709--1740}, annote = {http://www.pubs.royalsoc.ac.uk/}, } @mastersthesis{Qin16, address = {Garching, Germany}, title = {Impact of {LES} {Subgrid}-{Scale} {Modeling} on the {Acoustic} and {Flow} {Properties} for {Helmholtz} {Resonators} {Without} {Mean} {Flow}}, url = {https://mediatum.ub.tum.de/1311461}, school = {TU München}, author = {Qin, Yupeng}, year = {2016}, note = {Betreuer: Förner}, file = {Qin - 2016 - Impact of LES Subgrid-Scale Modeling on the Acoust.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7FEM4VD3\\Qin - 2016 - Impact of LES Subgrid-Scale Modeling on the Acoust.pdf:application/pdf}, } @inproceedings{FischPolif08, address = {Aachen}, title = {Modellierung der {Varianz}- und {Kovarianztransportgleichung} für {Large}-{Eddy}-{Simulation} ({LES}) mit {Vermischungsvorgängen}}, booktitle = {16. {DGLR}-{Fach}-{Symposium} {STAB}}, publisher = {STAB}, author = {Fischer, V. and Polifke, W.}, month = nov, year = {2008}, pages = {142,143}, } @unpublished{SilvaForne16a, address = {TU München}, type = {Lecture {Notes}}, title = {Notes on {Computational} {Thermo}-{Fluid} {Dynamics}}, url = {https://mediatum.ub.tum.de/doc/1328442/1328442.pdf}, author = {Silva, Camilo F. and Förner, Kilian and Polifke, Wolfgang}, year = {2016}, } @inproceedings{Polif08, address = {Erlangen, Germany}, title = {Flammenstabilität und {Thermoakustik}}, booktitle = {Kurzlehrgang {Verbrennung}}, publisher = {LTT Erlangen}, author = {Polifke, W.}, month = mar, year = {2008}, } @article{DobbeKnopf96, series = {1}, title = {Low {NOx} {Premixed} {Combustion} of {MBTU} {Fuels} {Using} the {ABB} {Double} {Cone} {Burner} ({EV} {Burner})}, volume = {118}, journal = {J. Eng. Gas Turbines Power}, author = {Döbbeling, K. and Knöpfel, H. P. and Polifke, W. and Winkler, D. and Steinbach, C. and Sattelmayer, T.}, year = {1996}, keywords = {Combustion, MediaTUM, Premixed flame, Emissions, Rev'd}, pages = {46--54}, file = {Döbbeling et al_1996_Low NOsubx-sub Premixed Combustion of MBTU Fuels Using the ABB Double Cone.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ICB9P732\\Döbbeling et al_1996_Low NOsubx-sub Premixed Combustion of MBTU Fuels Using the ABB Double Cone.pdf:application/pdf}, } @inproceedings{UlhaqHemch08, address = {Vilnius, Lithuania}, title = {Multiple-{Input}, {Single}-{Output} {Approach} for {Identification} of {Laminar} {Premixed} {Flame} {Dynamics} from {Direct} {Numerical} {Simulation}}, booktitle = {19th {International} {Congress} on {Sound} and {Vibration} ({ICSV19})}, author = {Ulhaq, A. and Hemchandra, S. and Tay-Wo-Chong, L. and Polifke, W.}, month = jul, year = {2012}, keywords = {Low order model, Acoustics, Frequency response}, file = {Ulhaq et al_2012_Multiple-input, single-output approach for identification of laminar premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\V77UINVG\\Ulhaq et al_2012_Multiple-input, single-output approach for identification of laminar premixed.pdf:application/pdf}, } @inproceedings{ShtilPolif90a, address = {Cambridge, UK}, title = {On the {Energy} {Cascade} and the {Reduction} of {Nonlinearity} in decaying {Turbulence}}, booktitle = {Proceedings of the {IUTAM} {Symposium} on ''{Topological} {Fluid} {Mechanics}''}, publisher = {Cambridge University Press.}, author = {Shtilman, L. and Polifke, W.}, year = {1990}, keywords = {Turbulence, Rev'd, Helicity}, annote = {The following values have no corresponding Zotero field:PB - Cambridge University PressCY - Cambridge, UK}, } @inproceedings{FolleKaess08a, address = {Vancouver, Canada}, series = {{AIAA}-2008-3046}, title = {Reconstruction of {Acoustic} {Transfer} {Matrices} from {Large}-{Eddy}-{Simulations} of {Complex} {Turbulent} {Flows}}, booktitle = {14th {AIAA}/{CEAS} {Aeroacoustics} {Conference} (29th {AIAA} {Aeroacoustics} {Conference})}, publisher = {AIAA/CEAS}, author = {Föller, S. and Kaess, R. and Polifke, W.}, year = {2008}, file = {Föller et al_2008_Reconstruction of Acoustic Transfer Matrices from Large-Eddy-Simulations of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\E8TX8SE5\\Föller et al_2008_Reconstruction of Acoustic Transfer Matrices from Large-Eddy-Simulations of.pdf:application/pdf}, } @inproceedings{SovarPolif15a, address = {Rhode-St-Genèse, BE}, series = {{VKI} {Lecture} {Series} 2015}, title = {{CFD}-{Based} {Modelling} of {Sound} {Generation} in {Ducted} {Discontinuities}}, booktitle = {Progress in simulation, control and reduction of ventilation noise}, publisher = {VKI}, author = {Sovardi, C. and Polifke, W.}, month = nov, year = {2015}, } @techreport{KaufmPolif09, title = {Abschlussbericht zum {Vorhaben} 1501301 der {Reaktorsicherheitsforschung} ''{Entwicklung} und {Validierung} einer {Euler}-{Euler} {Formulierung} für {Mehrphasenströmungen} mit beliebigem {Gasvolumenanteil} bei {Berücksichtigung} der {Phasengrenzfläche}''}, institution = {TU München}, author = {Kaufmann, Volker and Polifke, Wolfgang}, year = {2009}, } @article{PolifFlohr02, title = {Modeling of {Inhomogeneously} {Premixed} {Combustion} with an {Extended} {TFC} {Model}}, volume = {124}, url = {http://link.aip.org/link/JETPEZ/v124/i1/p58/s1&Agg=doi}, doi = {10.1115/1.1394964}, number = {1}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Polifke, W. and Flohr, P. and Brandt, M.}, year = {2002}, keywords = {Combustion, Turbulence, Rev'd}, pages = {58--65}, file = {Polifke et al_2002_Modeling of Inhomogeneously Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F5F76I7F\\Polifke et al_2002_Modeling of Inhomogeneously Premixed.pdf:application/pdf}, } @inproceedings{MartiKarth11, address = {Miami, U.S.A.}, series = {{AIAA} 2009-3263}, title = {Low-order modeling of a side-branch system at low {Mach} numbers}, booktitle = {15th {AIAA}/{CEAS} {Aeroacoustics} {Conference} (30th {AIAA} {Aeroacoustics} {Conference})}, author = {Martínez-Lera, P. and Karthik, B. and Schram, C. and Föller, S. and Kaess, R. and Polifke, W.}, month = may, year = {2009}, keywords = {Acoustics, Frequency response}, annote = {The following values have no corresponding Zotero field:CY - Miami, U.S.A.}, file = {Martinez-Lera et al_2009_Low-order modeling of a side-branch system at low Mach numbers.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H7FM2UUB\\Martinez-Lera et al_2009_Low-order modeling of a side-branch system at low Mach numbers.pdf:application/pdf}, } @inproceedings{LeeViola16b, address = {The Hague, Netherlands}, title = {Sound generation by bubble dynamics of intermittent horizontal two-phase pipe flow through an orifice}, volume = {12}, booktitle = {11th {International} {Conference} on {Flow}-{Induced} {Vibration}}, author = {{Lee, J. S.} and {Violato, Daniele} and {Polifke, Wolfgang}}, month = jul, year = {2016}, keywords = {submi}, file = {Lee, Joohwa Sarah et al_2016_Sound generation by bubble dynamics of intermittent horizontal two-phase pipe.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IRPNSKVV\\Lee, Joohwa Sarah et al_2016_Sound generation by bubble dynamics of intermittent horizontal two-phase pipe.pdf:application/pdf;Lee, Joohwa Sarah et al_2016_Sound generation by bubble dynamics of intermittent horizontal two-phase pipe.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6BSA4R6F\\Lee, Joohwa Sarah et al_2016_Sound generation by bubble dynamics of intermittent horizontal two-phase pipe.pdf:application/pdf}, } @inproceedings{ColloPolif12, address = {Darmstadt, Germany}, title = {Introduction of differential diffusion effect in methane premixed flame simulations through tabulated chemistry}, booktitle = {7th {OpenFOAM} {Workshop}}, author = {Collonval, F. and Polifke, W.}, month = jun, year = {2012}, } @inproceedings{SilvaFolle13, address = {Menaggio, Italy}, title = {Signal {Generation} and its {Influence} on the {Concurrent} {Identification} of {Flame} {Transfer} {Function} and {Combustion} {Noise}}, booktitle = {{EUROMECH} {Colloquium} 546 – {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Silva, Camilo F. and Föller, Stephan and Emmert, Thomas and Ulhaq, Ahtsham and Polifke, W.}, year = {2013}, file = {Silva et al_2013_Signal Generation and its Influence on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XQBY9I37\\Silva et al_2013_Signal Generation and its Influence on.pdf:application/pdf}, } @inproceedings{HuberPolif07a, address = {Lisbon, Portugal}, title = {Reconstruction of technical premixed flame dynamics by transient {CFD} and system identification}, booktitle = {11th {CEAS}-{ASC} {Workshop} \& 2nd {Scientific} {Workshop} of {X3} - {NOISE}: ''{Experimental} and {Numerical} {Analysis} and {Prediction} of {Combustion} {Noise}''}, author = {Huber, A. and Polifke, W.}, month = sep, year = {2007}, } @inproceedings{LacomFolle10, address = {Lyon, France}, title = {Numerical investigations on the whistling ability of a single hole orifice in a flow duct}, booktitle = {10eme {Congres} {Francais} d'{Acoustique}}, publisher = {Société Fraņcaise d'Acoustique}, author = {Lacombe, R. and Föller, S. and Jasor, G. and Polifke, W. and Aurégan, Y. and Moussou, P.}, month = apr, year = {2010}, keywords = {Fluid Dynamics, Aeroacoustics, Orifice, Scattering Matrix, Whistling Criterion}, file = {Lacombe et al_2010_Numerical investigations on the whistling ability of a single hole orifice in a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5TMPRM54\\Lacombe et al_2010_Numerical investigations on the whistling ability of a single hole orifice in a.pdf:application/pdf}, } @incollection{FolleKaess10, series = {{ISBN} 978-3-642-13871-3}, title = {Determination of {Acoustic} {Scattering} {Coefficients} via {Large} {Eddy} {Simulation} and {System} {Identification}}, booktitle = {High {Performance} {Computing} in {Science} and {Engineering}}, publisher = {Springer}, author = {Föller, S. and Kaess, R. and Polifke, W.}, editor = {Wagner, S. and Steinmetz, M. and Bode, A. and Müller, M.M.}, year = {2010}, pages = {243 -- 255}, file = {Föller et al_2010_Determination of Acoustic Scattering Coefficients via Large Eddy Simulation and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VIA2HUXM\\Föller et al_2010_Determination of Acoustic Scattering Coefficients via Large Eddy Simulation and.pdf:application/pdf}, } @inproceedings{HirscPolif97, address = {Univ. of Twente, Enschede, NL}, title = {Modelling {Turbulent} {Swirling} {Flows}: {Can} {LES} help?}, booktitle = {Workshop {DNS} and {LES} of {Complex} {Flows}: {Numerical} and {Modelling} {Aspects}}, author = {Hirsch, C. and Polifke, W. and Holzäpfel, F.}, year = {1997}, keywords = {Swirl, Turbulence, Simulation + Modelling, Invt'd}, annote = {gedruckt}, annote = {The following values have no corresponding Zotero field:JF - Workshop DNS and LES of Complex Flows: Numerical and Modelling AspectsCY - Univ. of Twente, Enschede, NL}, } @inproceedings{Polif16a, address = {Stuttgart, Germany}, title = {Thermoacoustic instability - a major challenge for gas turbine combustion technology}, booktitle = {German-{China} {Workshop} on {Gas} {Turbine} {Technology}}, author = {Polifke, Wolfgang}, month = jul, year = {2016}, } @phdthesis{Mulle15, address = {München, Germany}, type = {{PhD} {Thesis}}, title = {Control authority for active damping of combustion instabilities}, school = {Technische Universität München}, author = {Müller, A. J., Roel}, month = mar, year = {2015}, file = {Müller_2015_Control authority for active damping of combustion instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\86SV5H48\\Müller_2015_Control authority for active damping of combustion instabilities.pdf:application/pdf}, } @inproceedings{SovarPolif14a, address = {München}, title = {Identification of {Sound} sources in internal non-reactive flows: a {LES}-{SI}-{DMD} approach}, booktitle = {19. {DGLR}-{Fach}-{Symposiums} der {STAB}}, publisher = {DGLR}, author = {Sovardi, Carlo and Polifke, Wolfgang}, year = {2014}, file = {Sovardi_Polifke_2014_Identification of Sound sources in internal non-reactive turbulent flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\83C8CMJV\\Sovardi_Polifke_2014_Identification of Sound sources in internal non-reactive turbulent flows.pdf:application/pdf}, } @inproceedings{SelimFolle08, address = {Berlin, Germany}, title = {Nonlinear {Identification} of the {Unsteady} {Heat} {Transfer} of a {Cylinder} in {Pulsating} {Crossflow}}, booktitle = {Int. {Conf}. on {Jets}, {Wakes} and {Separated} {Flows}}, publisher = {Technical University Berlin}, author = {Selimefendigil, F. and Föller, S. and Polifke, W.}, month = sep, year = {2008}, keywords = {Fluid Dynamics, Turbulence, LES, Mixing}, file = {Selimefendigil et al_2008_Nonlinear Identification of the Unsteady Heat Transfer of a Cylinder in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TU989TQS\\Selimefendigil et al_2008_Nonlinear Identification of the Unsteady Heat Transfer of a Cylinder in.pdf:application/pdf}, } @inproceedings{PolifHirsc01, address = {Essen}, series = {{VDI} {Bericht} 1629}, title = {Instabilität eines {Vormischbrenners} mit nicht-monotoner {Druckverlust}-{Kennlinie}}, booktitle = {20. {VDI} {Flammentag}}, author = {Polifke, W. and Hirsch, C. and Fischer, A. and Sattelmayer, T.}, month = sep, year = {2001}, keywords = {Unrev'd}, pages = {277--282}, file = {Polifke et al_2001_Instabilität eines Vormischbrenners mit nicht-monotoner Druckverlust-Kennlinie.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Q7WE2WWA\\Polifke et al_2001_Instabilität eines Vormischbrenners mit nicht-monotoner Druckverlust-Kennlinie.pdf:application/pdf}, } @book{PolifKopit05, address = {München}, series = {Maschinenbau}, title = {Wärmeübertragung}, isbn = {978-3-8273-7104-1}, url = {http://lib.myilibrary.com?id=505990}, publisher = {Pearson Studium}, author = {Polifke, W and Kopitz, J}, year = {2005}, keywords = {Wärme, Wärmeübertragung}, } @inproceedings{Polif08a, address = {Stockholm, Sweden}, title = {Identification of thermo- and aero-acoustic response functions from {CFD} time series}, booktitle = {Invited {Talk}}, publisher = {Linne Flow Centre, Royal Inst. of Technology}, author = {Polifke, W.}, month = oct, year = {2008}, } @inproceedings{KarbaOgus14, series = {{AIAA} 2014-3225}, title = {Noise produced by a tandem diaphragm: {Experimental} and numerical investigations}, volume = {1889654}, doi = {10.2514/6.2014-3225}, booktitle = {20th {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, author = {Karban, Ugur and Ogus, Guven and Kucukcoskun, Korcan and Schram, Christophe and Sovardi, Carlo and Polifke, Wolfgang}, year = {2014}, keywords = {MediaTUM}, pages = {16--20}, file = {Karban et al_2014_Noise produced by a tandem diaphragm.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TYSDNFJZ\\Karban et al_2014_Noise produced by a tandem diaphragm.pdf:application/pdf}, } @article{KarbaSchra16, title = {Tailored {Green}’s functions for the prediction of the noise generated by single and tandem orifices in a circular duct}, volume = {102}, url = {http://www.ingentaconnect.com/content/dav/aaua/2016/00000102/00000005/art00003}, doi = {10.3813/AAA.918993}, number = {5}, journal = {Acta Acustica united with Acustica}, author = {Karban, Ugur and Schram, Christoph and Sovardi, Carlo and Polifke, Wolfgang}, year = {2016}, keywords = {MediaTUM}, pages = {779--792}, file = {Karban et al_2016_Tailored Green’s functions for the prediction of the noise generated by single.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J5389PSP\\Karban et al_2016_Tailored Green’s functions for the prediction of the noise generated by single.pdf:application/pdf}, } @inproceedings{CardePolif13, address = {Munich, Germany}, title = {On the {Reflection}, {Transmission}, {Coupling} and {Damping} of {Non}-{Plane} {Acoustic} {Modes} by {Resonator} {Rings}}, booktitle = {5th {European} {Conference} for {Aeronautics} and {Space} {Sciences}}, publisher = {EUCASS}, author = {Cárdenas Miranda, A. and Polifke, W.}, month = jul, year = {2013}, pages = {41--54}, file = {Càrdenas Miranda_Polifke_2012_On the Reflection, Transmission, Coupling and Damping of Non-Plane Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S83UWI3U\\Càrdenas Miranda_Polifke_2012_On the Reflection, Transmission, Coupling and Damping of Non-Plane Acoustic.pdf:application/pdf;Cárdenas Miranda_Polifke_2013_On the Reflection, Transmission, Coupling and Damping of Non-Plane Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6AWAS5VI\\Cárdenas Miranda_Polifke_2013_On the Reflection, Transmission, Coupling and Damping of Non-Plane Acoustic.pdf:application/pdf}, } @inproceedings{ColloPolif14, address = {Düsseldorf, Germany}, series = {{GT2014}-27293}, title = {Modelling the {Formation} of {Oxides} of {Nitrogen} in {Premix} {Combustion} by {Extending} {Tabulated} {Chemistry} with {Algebraic} {Relations}}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2014}, author = {Collonval, F. and Polifke, W.}, year = {2014}, file = {Collonval_Polifke_2014_Modelling the Formation of Oxides of Nitrogen in Premix Combustion by Extending.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BKUJH5F2\\Collonval_Polifke_2014_Modelling the Formation of Oxides of Nitrogen in Premix Combustion by Extending.pdf:application/pdf}, } @phdthesis{Evesq00, address = {University of Cambridge, Department of Engineering}, type = {{PhD} {Thesis}}, title = {Adaptive control of combustion oscillations}, author = {Evesque, S}, year = {2000}, file = {Evesque_PhD.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MSG3G23U\\Evesque_PhD.pdf:application/pdf}, } @inproceedings{SenioLutum93, address = {London, UK}, series = {Paper {G22}}, title = {Combustion {Technology} of the {ABB} {GT13E2} {Annular} {Combustor}}, booktitle = {20th {Int}. {Congress} on {Combustion} {Engines}}, publisher = {CIMAC}, author = {Senior, P. and Lutum, E. and Polifke, W. and Sattelmayer, T.}, year = {1993}, keywords = {Combustion, Unrev'd}, file = {Senior et al_1993_Combustion Technology of the ABB GT13E2 Annular Combustor.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DZFB89R5\\Senior et al_1993_Combustion Technology of the ABB GT13E2 Annular Combustor.pdf:application/pdf}, } @phdthesis{El-Sa04, address = {Giza, Egypt}, type = {{PhD} {Thesis}}, title = {Modeling and {Performance} {Analysis} of {Solid} {Oxide} {Fuel} {Cells} ({SOFC})}, author = {El-Sayed Aly Mohamed Youssef, M}, month = apr, year = {2004}, file = {ElSay04.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z5EN6MPK\\ElSay04.pdf:application/pdf}, } @inproceedings{SattePolif96, address = {Jakarta, Indonesia}, title = {{NO}$_{\textrm{x}}$ {Abatement} {Potential} of {Lean}-{Premixed} {GT}-{Combustors}}, booktitle = {{ASME} {Turbo} {Asia}}, author = {Sattelmayer, T. and Polifke, W. and Winkler, D. and Döbbeling, K.}, year = {1996}, keywords = {Combustion, Emissions, Rev'd}, } @inproceedings{GenteCaton03, title = {Flow {Reactor} {Experiments} on the {Selective} {Non}-{Catalytic} {Removal} ({SNCR}) of {Nitric} {Oxide} {Using} a {Urea}-{Water} {Solution}}, author = {Gentemann, A M G and Caton, J A}, year = {2003}, annote = {The following values have no corresponding Zotero field:JF - VDI FlammentagCY - Cottbus, Germany}, } @inproceedings{NeuneKopit07, series = {1}, title = {Numerical eigen-mode analysis of an acoustic-duct system by {CFD}-{OLG} and comparison against experiment}, volume = {7}, doi = {10.1002/pamm.200700394}, booktitle = {{PAMM} {Proc}. {Appl}. {Math}. {Mech}.}, author = {Neunert, U. and Kopitz, J. and Sattelmayer, T. and Polifke, W.}, month = oct, year = {2007}, pages = {4120003--4120004}, file = {Neunert et al_2007_Numerical eigen-mode analysis of an acoustic-duct system by CFD-OLG and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9C9EZPX9\\Neunert et al_2007_Numerical eigen-mode analysis of an acoustic-duct system by CFD-OLG and.pdf:application/pdf}, } @mastersthesis{Lampm16, title = {Numerical {Modelling} of {Microbubble} {Dynamics} using {Lagrangian} {Tracking}}, school = {Technische Universität München}, author = {Lampmann, Arne}, year = {2016}, note = {Betreuer: Achuri}, annote = {History\_Force.pdf}, annote = {Sehr geehrter Herr Professor Polifke,meine Masterarbeit habe ich bereits bei Javier Achury eingereicht.Ich wollte Ihnen aber wegen der Diskussionen bezüglich der History Force nach meinem Vortrag noch einmal in einer verkürzten Form meine Untersuchung der History Force zusammenfassen. Dazu habe ich auch einen entsprechenden Graphen angehangen.Der Graph zeigt die Kernel-Funktion der History Force, also die Gewichtung des jeweiligen Zeitschrittes zur Berechnung des History Force Integrals, nach dem Modell von Mei et al. (MF). Bei diesem Modell hängt die History Force von der Beschleunigung und der dazugehörenden Reynolds-Zahl zu jedem vorherigen Zeitschritt ab, sowie davon, wie lange der ausgewertete Zeitschritt zurückliegt. Aus diesem Grund entsteht ein Maximum in der Kernel-Funktion zu Beginn der Beschleunigung, da zu diesem Zeitpunkt die Reynolds-Zahl klein ist und eines zum Ende, da die jüngsten Zeitschritte einen großen Einfluss haben.Zusätzlich ist eine alternative Interpretation der Formeln nach Mei et al. eingezeichnet, bei dem die History Force mit einer konstanten Reynolds-Zahl berechnet wird (MF:H(Re)), die zu dem aktuellen Zeitschritt t* vorliegt (in diesem Fall t*=3.2). Daher ist die History Force Kernel-Funktion nur noch von der Zeit abhängig und dementsprechend steigt sie zum aktuellen Zeitschritt an.Die Formulierungen in den Quellen lassen beide Implementierungen zu und auch nach Rücksprache mit meinem Betreuer in London konnten wir keine eindeutige Aussage treffen. In der Arbeit werden beide Implementierungen verglichen und je nach Reynolds-Zahl-Bereich unterscheiden sich ihre Einflüsse unterschiedlich stark. Eine eindeutige Verbesserung gegenüber der anderen Implementierung ist bei keiner der beiden Implementierungen zu erkennen.    }, file = {Lampmann_2016_Numerical Modelling of Microbubble Dynamics using Lagrangian Tracking.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6UW6GM65\\Lampmann_2016_Numerical Modelling of Microbubble Dynamics using Lagrangian Tracking.pdf:application/pdf}, } @inproceedings{MulleTemml07, address = {Bangkok, Thailand}, title = {{CFD} - based feasibility study of active control on a combustion instability}, booktitle = {20th {International} {Congress} on {Sound} and {Vibration} ({ICSV20})}, author = {Müller, R. A. J. and Temmler, C. and Widhopf-Fenk, R. and Hermann, J. and Polifke, W. and Stopford, P.}, month = jul, year = {2013}, file = {Müller et al_2013_CFD - based feasibility study of active control on a combustion instability.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SK6P9NVQ\\Müller et al_2013_CFD - based feasibility study of active control on a combustion instability.pdf:application/pdf}, } @inproceedings{PolifMulle01, address = {Maastricht, The Netherlands}, series = {{AIAA} 2001-2274}, title = {Sound {Emission} of {Rotor} {Induced} {Deformations} of {Generator} {Casings}}, booktitle = {7th {AIAA}/{CEAS} {Aeroacoustics} {Conference}}, publisher = {AIAA}, author = {Polifke, W. and Müller, B. and Yee, H. K.}, year = {2001}, keywords = {Unrev'd}, annote = {The following values have no corresponding Zotero field:IS - AIAA 2001-2274CY - Maastricht, NL}, file = {Polifke et al_2001_Sound Emission of Rotor Induced Deformations of Generator Casings.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6EI6QEQ8\\Polifke et al_2001_Sound Emission of Rotor Induced Deformations of Generator Casings.pdf:application/pdf}, } @inproceedings{Polif04d, address = {Rhode-St-Genèse, BE}, series = {{VKI} {LS} 2004-05}, title = {Numerical {Techniques} for {Identification} of {Acoustic} {Multi}-{Poles}}, booktitle = {Advances in {Aeroacoustics} and {Applications}}, publisher = {Von Karman Institute}, author = {Polifke, W.}, editor = {Anthoine, J. and Hirschberg, A.}, year = {2004}, keywords = {Low order model, Simulation + Modelling, Frequency response}, file = {Polifke_2004_Numerical Techniques for Identification of Acoustic Multi-Poles.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B5E3V6RX\\Polifke_2004_Numerical Techniques for Identification of Acoustic Multi-Poles.pdf:application/pdf}, } @inproceedings{IvancFlohr04, address = {Vienna, Austria}, series = {{GT}-2004-53339}, title = {Auto-{Ignition} {And} {Heat} {Release} {In} {A} {Gas} {Turbine} {Burner} {At} {Elevated} {Temperature}}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, publisher = {ASME}, author = {Ivancic, B. and Flohr, P. and Paikert, B. and Brandt, M. and Polifke, W.}, year = {2004}, keywords = {Combustion, Turbulence, Simulation + Modelling}, file = {Ivancic et al_2004_Auto-Ignition And Heat Release In A Gas Turbine Burner At Elevated Temperature.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZAS5HQFI\\Ivancic et al_2004_Auto-Ignition And Heat Release In A Gas Turbine Burner At Elevated Temperature.pdf:application/pdf}, } @phdthesis{Ramda15, address = {Oran}, type = {{PhD} {Thesis}}, title = {Simulation numerique d’un moteur thermoacoustique}, school = {Universite Des Sciences et de la Technologie Mohamed Boudiaf Oran}, author = {Ramdane, M. Z. Dar}, year = {2015}, file = {Présentation1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7MUCKUFF\\Présentation1.pdf:application/pdf;Ramdane_2015_Simulation numerique d’un moteur thermoacoustique.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B2Z7HPIC\\Ramdane_2015_Simulation numerique d’un moteur thermoacoustique.pdf:application/pdf}, } @article{PaggiMichl10, series = {2}, title = {Cryo-adsorptive hydrogen storage on activated carbon. {II}: {Investigation} of the thermal effects during filling at cryogenic temperatures}, volume = {35}, journal = {International Journal of Hydrogen Energy}, author = {Paggiaro, R. and Michl, F. and Bénard, P. and Polifke, W.}, year = {2010}, keywords = {Simulation + Modelling, thermodynamics, Ad-Ab-De-Sorption}, pages = {648--659}, file = {Paggiaro et al_2010_Cryo-adsorptive hydrogen storage on activated carbon.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GHEC9JG8\\Paggiaro et al_2010_Cryo-adsorptive hydrogen storage on activated carbon.pdf:application/pdf}, } @inproceedings{Polif11i, address = {Munich, Germany}, title = {Nonlinear identification of heat source dynamics}, url = {www.slideshare.net/Polifke/iitm10key}, booktitle = {Workshop ''{Nonlinear} {Thermo} {Acoustics} and {Active} {Instability} {Control} ''}, publisher = {ifTA GmbH / LIMOUSINE}, author = {Polifke, W.}, month = mar, year = {2011}, } @inproceedings{DemsCarne12a, address = {Heidelberg, Germany}, series = {{ISBN} 978-88-903712-1-9}, title = {Large {Eddy} {Simulation} of a polydisperse, evaporating spray jet with a presumed function method of moments}, url = {http://www.iclass2012.org/}, booktitle = {12th {International} {Conference} on {Liquid} {Atomization} and {Spray} {Systems}}, author = {Dems, Patrick and Carneiro, Joao N.E. and Polifke, Wolfgang}, month = sep, year = {2012}, file = {Dems et al_2012_Large Eddy Simulation of a polydisperse, evaporating spray jet with a presumed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HV5NXAVX\\Dems et al_2012_Large Eddy Simulation of a polydisperse, evaporating spray jet with a presumed.pdf:application/pdf}, } @phdthesis{Mages16, address = {Garching, Germany}, type = {Bachelor's {Thesis}}, title = {Numerische {Untersuchung} des akustischen nichtlinearen {Dämpfungsverhaltens} von perforierten {Platten} und {Helmholtzresonatoren}}, url = {https://mediatum.ub.tum.de/node?id=1291369}, language = {German}, school = {TU München}, author = {Mages, Alexander}, year = {2016}, note = {Supervisor: Förner}, file = {Mages - 2016 - Numerische Untersuchung des akustischen nichtlinea.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZU9SFX5X\\Mages - 2016 - Numerische Untersuchung des akustischen nichtlinea.pdf:application/pdf}, } @article{DuroxSchul02, title = {Self-induced instability of a premixed jet flame impinging on a plate}, volume = {29}, issn = {15407489}, url = {http://linkinghub.elsevier.com/retrieve/pii/S154074890280013X}, doi = {10.1016/S1540-7489(02)80013-X}, language = {en}, number = {1}, urldate = {2017-11-07}, journal = {Proceedings of the Combustion Institute}, author = {Durox, D. and Schuller, T. and Candel, S.}, month = jan, year = {2002}, pages = {69--75}, file = {Durox et al. - 2002 - Self-induced instability of a premixed jet flame i.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G9J7Z322\\Durox et al. - 2002 - Self-induced instability of a premixed jet flame i.pdf:application/pdf}, } @article{GicquGourd11, title = {High performance parallel computing of flows in complex geometries}, volume = {339}, url = {http://www.sciencedirect.com/science/article/pii/S163107211000207X}, number = {2-3}, urldate = {2017-06-22}, journal = {Comptes Rendus Mecanique}, author = {Gicquel, Laurent YM and Gourdain, N. and Boussuge, J.-F. and Deniau, H. and Staffelbach, G. and Wolf, P. and Poinsot, Thierry}, year = {2011}, pages = {104--124}, file = {[HTML] infona.pl:C\:\\Users\\niebl\\Zotero\\storage\\H3NMVZGK\\bwmeta1.element.html:text/html;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\5FTXCZ5W\\S163107211000207X.html:text/html}, } @article{LippeWeidn17, title = {Long-{Term} {NOx} {Emission} {Behavior} of {Heavy} {Duty} {Gas} {Turbines}: {An} {Approach} for {Model}-{Based} {Monitoring} and {Diagnostics}}, shorttitle = {Long-{Term} {NOx} {Emission} {Behavior} of {Heavy} {Duty} {Gas} {Turbines}}, url = {http://dx.doi.org/10.1115/GT2017-63181}, doi = {10.1115/GT2017-63181}, abstract = {Accurate monitoring of gas turbine performance is a means to an early detection of performance deviation from the design point and thus to an optimized operational control. In this process, the diagnosis of the combustion process is of high importance due to strict legal pollution limits as aging of the combustor during operation may lead to an observed progression of NOx emissions. The method presented here features a semi-empirical NOx formulation incorporating aging for the GT24/GT26 heavy duty gas turbines: Input parameters to the NOx-correlation are processed from actual measurement data in a simplified gas turbine model. Component deterioration is accounted for by linking changes in air flow distribution and control parameters to specific operational measurements of the gas turbine. The method was validated on three different gas turbines of the GE GT24/GT26 fleet for part- and baseload operation with a total of 374,058 long-term data points (5 min average), corresponding to a total of 8.5 years of observation, while only commissioning data was used for the formulation of the NOx correlation. When input parameters to the correlation are adapted for aging, the NOx prediction outperforms the benchmark prediction method without aging by 36.7, 54.0 and 26.7 \% in terms of RMSE yielding a root-mean-squared error of 1.26, 1.81 and 2.99 ppm for the investigated gas turbines over a three year monitoring period.}, urldate = {2017-08-31}, author = {Lipperheide, Moritz and Weidner, Frank and Wirsum, Manfred and Gassner, Martin and Bernero, Stefano}, month = jun, year = {2017}, pages = {V006T05A001}, file = {Lipperheide et al_2017_Long-Term NOx Emission Behavior of Heavy Duty Gas Turbines.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F66U3XK5\\Lipperheide et al_2017_Long-Term NOx Emission Behavior of Heavy Duty Gas Turbines.pdf:application/pdf}, } @techreport{jaensch_identification_2015, title = {Identification of the {FTF} without external forcing and sensing heat release rate from pressure readings}, author = {Jaensch, Stefan and Sovardi, Carlo and Emmert, Thomas and Polifke, Wolfgang and Tangirala, Arun K.}, year = {2015}, file = {Jaensch et al_2015_Identification of the FTF without external forcing and sensing heat release.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RZ4J8AVJ\\Jaensch et al_2015_Identification of the FTF without external forcing and sensing heat release.pdf:application/pdf}, } @article{KarbaSchra17a, title = {Modal identification of aeroacoustic systems using passive and active approaches}, volume = {142}, url = {http://scitation.aip.org/content/asa/journal/jasa/142/6/10.1121/1.5018613?aemail=author}, doi = {10.1121/1.5018613}, number = {6}, journal = {JASA}, author = {Karban, Ugur and Schram, Christophe}, year = {2017}, keywords = {MediaTUM}, file = {Karban_Schram_2017_Modal identification of aeroacoustic systems using passive and active approaches.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7BJ9B42T\\Karban_Schram_2017_Modal identification of aeroacoustic systems using passive and active approaches.pdf:application/pdf;Karban_Schram_2017_Modal identification of aeroacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7CHFK95S\\Karban_Schram_2017_Modal identification of aeroacoustic.pdf:application/pdf}, } @article{LiuDaley99, title = {Output-model-based predictive control of unstable combustion systems using neural networks}, volume = {7}, issn = {0967-0661}, url = {http://www.sciencedirect.com/science/article/pii/S0967066199000180}, doi = {10.1016/S0967-0661(99)00018-0}, abstract = {A novel strategy for the active stabilisation of combustion systems is presented. The algorithm is comprised of three parts: an output model, an output predictor and a feedback controller. The output model which is established using neural networks is used to predict the output in order to overcome the time delay of the system, which is often very large compared with the sampling period. An output-feedback controller is introduced which uses the output of the predictor to suppress instability in the combustion process. The approach developed is first demonstrated using a simulated unstable combustor with six modes. Results are also presented showing its application to an experimental combustion facility using a loudspeaker actuation device.}, number = {5}, urldate = {2018-08-20}, journal = {Control Engineering Practice}, author = {Liu, G. P. and Daley, S.}, month = may, year = {1999}, keywords = {Combustion, Neural networks, Prediction, Unstable system}, pages = {591--600}, file = {Liu and Daley - 1999 - Output-model-based predictive control of unstable .pdf:C\:\\Users\\niebl\\Zotero\\storage\\WRMZJPUD\\Liu and Daley - 1999 - Output-model-based predictive control of unstable .pdf:application/pdf}, } @article{SharmDiwak99, title = {Potential applications of artificial neural networks to thermodynamics: vapor–liquid equilibrium predictions}, volume = {23}, issn = {0098-1354}, shorttitle = {Potential applications of artificial neural networks to thermodynamics}, url = {http://www.sciencedirect.com/science/article/pii/S0098135498002816}, doi = {10.1016/S0098-1354(98)00281-6}, abstract = {The associative property of artificial neural networks (ANNs) and their inherent ability to “learn” and “recognize” highly non-linear and complex relationships finds them ideally suited to a wide range of applications in chemical engineering. Dynamic Modeling and Control of Chemical Process Systems and Fault Diagnosis are the two significant applications of ANNs that have been explored so far with success. This paper deals with the potential applications of ANNs in thermodynamics — particularly, the prediction/estimation of vapor–liquid equilibrium (VLE) data. The prediction of VLE data by conventional thermodynamic methods is tedious and requires determination of “constants” which is arbitrary in many ways. Also, the use of conventional thermodynamics for predicting VLE data for highly polar substances introduces a large number of inaccuracies. The possibility of applying ANNs for VLE data prediction/estimation has been explored using the back propagation algorithm. The methane–ethane and ammonia–water systems have been studied and the VLE predictions have been found to be accurate to within ±1\%. Preliminary results confirm exciting possibilities of ANNs for applications to thermodynamics of mixtures. Advantages and limitations of this application are also discussed. An heuristic approach to reduce the trial and error process for selecting the “optimum” net architecture is discussed.}, number = {3}, urldate = {2018-08-20}, journal = {Computers \& Chemical Engineering}, author = {Sharma, Raj and Singhal, Diwakar and Ghosh, Ranjana and Dwivedi, Ashish}, month = feb, year = {1999}, pages = {385--390}, file = {Sharma et al. - 1999 - Potential applications of artificial neural networ.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HZCY9ER5\\Sharma et al. - 1999 - Potential applications of artificial neural networ.pdf:application/pdf}, } @inproceedings{DirnbSchil18, address = {Garching, Germany}, title = {Modular test rig for a pulsating heat pipe ({PHP})}, author = {Dirnberger, Lukas and Schily, Felix and Polifke, Wolfgang}, month = jul, year = {2018}, keywords = {interne Posterpräsentation}, file = {Dirnberger et al. - 2018 - Modular test rig for a pulsating heat pipe (PHP).pdf:C\:\\Users\\niebl\\Zotero\\storage\\I8SIUW4M\\Dirnberger et al. - 2018 - Modular test rig for a pulsating heat pipe (PHP).pdf:application/pdf}, } @inproceedings{KawaiShimo14, address = {Atlanta, GA, USA}, series = {{AIAA} 2014-2737}, title = {Kriging-model-based uncertainty quantification in computational fluid dynamics}, doi = {10.2514/6.2014-2737}, publisher = {AIAA}, author = {Kawai, Soshi and Shimoyama, Koji}, month = jun, year = {2014}, file = {kawai2014.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VXMJFGJV\\kawai2014.pdf:application/pdf}, } @article{PolifFisch03, title = {Instability of a {Premix} {Burner} with {Non}-{Monotonic} {Pressure} {Drop} {Characteristic}}, volume = {125}, doi = {10.1115/1.1519267}, number = {1}, journal = {J. Eng. Gas Turbines and Power}, author = {Polifke, W. and Fischer, A. and Sattelmayer, T.}, month = jan, year = {2003}, keywords = {Thermoacoustics, Swirl, Premixed flame, Frequency response, Rev'd}, pages = {20--27}, annote = {Originally published as ASME \{ 2001-GT-35\}}, file = {Polifke et al_2003_Instability of a Premix Burner with Non-Monotonic Pressure Drop Characteristic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HEQW4P5G\\Polifke et al_2003_Instability of a Premix Burner with Non-Monotonic Pressure Drop Characteristic.pdf:application/pdf}, } @article{EmmerCarde12, series = {012040}, title = {Low-{Order} {Analysis} of {Conjugate} {Heat} {Transfer} in {Pulsating} {Flow} with {Fluctuating} {Temperature}}, volume = {395}, url = {http://iopscience.iop.org/1742-6596/395/1/012040}, doi = {http://dx.doi.org/10.1088/1742-6596/395/1/012040}, urldate = {2014-02-11}, journal = {J. Phys.: Conf. Ser.}, author = {Emmert, Thomas and Cárdenas, Alejandro and Polifke, Wolfgang}, year = {2012}, file = {Emmert et al_2012_Low-Order Analysis of Conjugate Heat Transfer in Pulsating Flow with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RD89JWF6\\Emmert et al_2012_Low-Order Analysis of Conjugate Heat Transfer in Pulsating Flow with.pdf:application/pdf}, } @inproceedings{NiPolif00, address = {Munich, Germany}, series = {{ASME} 2000-{GT}-0103}, title = {Ignition {Delay} {Time} {Modulation} as a {Contribution} to {Thermo}-{Acoustic} {Instability} in {Sequential} {Combustion}}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, publisher = {ASME}, author = {Ni, A. and Polifke, W. and Joos, F.}, year = {2000}, keywords = {ignition, Rev'd}, pages = {10--10}, annote = {The following values have no corresponding Zotero field:IS - 2000-GT-0103CY - Munich, Germany}, annote = {vorhanden}, file = {Ni et al_2000_Ignition Delay Time Modulation as a Contribution to Thermo-Acoustic Instability.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4ZG4SZZ3\\Ni et al_2000_Ignition Delay Time Modulation as a Contribution to Thermo-Acoustic Instability.pdf:application/pdf}, } @article{SattePolif03a, title = {A {Novel} {Method} for the {Computation} of the {Linear} {Stability} of {Combustors}}, volume = {175}, doi = {10.1080/00102200302387}, number = {3}, journal = {Combustion Science and Technology}, author = {Sattelmayer, T. and Polifke, W.}, year = {2003}, keywords = {Stability, Thermoacoustics, Simulation + Modelling, Rev'd}, pages = {477--497}, file = {Sattelmayer_Polifke_2003_A Novel Method for the Computation of the Linear Stability of Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Q557Z26F\\Sattelmayer_Polifke_2003_A Novel Method for the Computation of the Linear Stability of Combustors.pdf:application/pdf}, } @inproceedings{OberlAlbay18a, address = {Bad Neuenahr}, title = {Abschätzung der {Flammentransferfunktion} aus stationären {Strömungsfeldern}}, volume = {R583}, booktitle = {Informationstagung {Turbomaschinen}, {Frühjahr} 2018}, publisher = {FVV}, author = {Oberleithner, K. and Albayrak, A.}, year = {2018}, keywords = {MediaTUM}, pages = {1--35}, file = {Oberleithner and Albayrak - 2018 - Abschätzung der Flammentransferfunktion aus statio.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DV8MX5UV\\Oberleithner and Albayrak - 2018 - Abschätzung der Flammentransferfunktion aus statio.pdf:application/pdf}, } @inproceedings{KaessPoins09, address = {Vienna, Austria}, title = {Determination of the stability map of a premix burner based on flame transfer functions computed with transient {CFD}}, booktitle = {4th {European} {Combustion} {Meeting}}, publisher = {The Combustion Institute}, author = {Kaess, R. and Poinsot, T. and Polifke, W.}, year = {2009}, keywords = {Thermoacoustics, Frequency response, Rev'd, Numerics}, file = {Kaess et al_2009_Determination of the stability map of a premix burner based on flame transfer.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DG2TSFQF\\Kaess et al_2009_Determination of the stability map of a premix burner based on flame transfer.pdf:application/pdf}, } @inproceedings{SoumaLore15, address = {Aachen, Germany}, series = {{COCO}'15}, title = {Early {Detection} of {Combustion} {Instability} by {Neural}-symbolic {Analysis} on {Hi}-speed {Video}}, url = {http://dl.acm.org/citation.cfm?id=2996831.2996843}, abstract = {This paper proposes a neural-symbolic framework for analyzing a large volume of sequential hi-speed images of combustion flame for early detection of instability that is extremely critical for engine health monitoring and prognostics. The proposed hierarchical approach involves extracting low-dimensional semantic features from images using deep Convolutional Neural Networks (CNN) followed by capturing the temporal evolution of the extracted features using Symbolic Time Series Analysis (STSA). Furthermore, the semantic nature of the CNN features enables expert-guided data exploration that can lead to better understanding of the underlying physics. Extensive experimental data have been collected in a swirl-stabilized dump combustor at various operating conditions for validation.}, urldate = {2018-08-20}, booktitle = {Proceedings of the 2015th {International} {Conference} on {Cognitive} {Computation}: {Integrating} {Neural} and {Symbolic} {Approaches} - {Volume} 1583}, publisher = {CEUR-WS.org}, author = {Sarkar, Soumalya and Lore, Kin Gwn and Sarkar, Soumik}, year = {2015}, pages = {93--101}, file = {Sarkar et al. - 2015 - Early Detection of Combustion Instability by Neura.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WVYISD6N\\Sarkar et al. - 2015 - Early Detection of Combustion Instability by Neura.pdf:application/pdf}, } @misc{Emmer14, title = {Literature with {Zotero}}, author = {Emmert, Thomas}, year = {2014}, file = {Emmert_2014_Literature with Zotero.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WSVHFCN9\\Emmert_2014_Literature with Zotero.pdf:application/pdf}, } @mastersthesis{Ladwi17, address = {Garching, Germany}, title = {Numerische {Modellierung} und thermodynamische {Betrachtung} einer {Pulsating} {Heat} {Pipe}}, school = {Technische Universität München}, author = {Ladwig, Christian}, month = nov, year = {2017}, note = {Betreuer: Felix Schily}, file = {Ladwig_2017_-Numerische Modellierung und.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I3C7S7NB\\Ladwig_2017_-Numerische Modellierung und.pdf:application/pdf}, } @phdthesis{CalakCalak17, address = {Munich}, type = {Bachelor {Thesis}}, title = {Identification of {Wiener}-{Models} for the {Heat} {Transfer} between a {Cylinder} and a {Pulsating} {Cross} {Flow}}, abstract = {The unsteady heat release behavior of a circular cylinder in pulsating cross flow is numerically investigated. Direct numerical simulations are conducted for four different mean flow Reynolds numbers between 0.4 and 120 and six different flow velocityp erturbation amplitudes between 5\% and 150\% of the mean velocity, solving the incompressible Navier-Stokes equations in a 2D domain by practicing a finite volume approach. The numerical simulations are excited with mono-frequent or broadband excitation signals. The implementation of the numerical simulation was done via the software OpenFoam and system identification methods were applied to develop discrete-time models from simulation data series representing the dynamic heat release behavior. Using simulations with broadband excitation, linear output error models and nonlinear Wiener models are identified and their results for various flow features are compared. It has been observed that Wiener models with a constrained nonlinearity function exhibit the most satisfactory results in general. The unsteady heat transfer behavior is analyzed in dependence of Strouhal numbers up to 40. Further, correlations between Reynolds and Nusselt numbers are plotted using input-output data of the monofrequent simulations, linear and nonlinear models to introduce and inspect the phenomenon of limit cycles. The presented model response expressions and Reynolds-Nusselt number correlations allow insight in the physics of the dynamic heat transfer behavior of a cylinder in pulsating cross flow and facilitate the use of thesemodels in further studies.}, language = {English}, school = {Technical University of Munich}, author = {Çalak, Ateş}, month = mar, year = {2017}, file = {Çalak - 2017 - Identification of Wiener-Models for the Heat Trans.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JUW3YYPX\\Çalak - 2017 - Identification of Wiener-Models for the Heat Trans.pdf:application/pdf}, } @inproceedings{HolziPolif08, address = {Vilnius, Lithuania}, title = {Optimization of {Thermoacoustic} {Stacks} for {Maximum} {Generation} of {Acoustic} {Energy}}, booktitle = {19th {International} {Congress} on {Sound} and {Vibration} ({ICSV19})}, author = {Holzinger, T. and Polifke, W.}, month = jul, year = {2012}, keywords = {Low order model, Acoustics, Frequency response}, file = {Holzinger_Polifke_2012_Optimization of Thermoacoustic Stacks for Maximum Generation of Acoustic Energy.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D3RI9BTW\\Holzinger_Polifke_2012_Optimization of Thermoacoustic Stacks for Maximum Generation of Acoustic Energy.pdf:application/pdf}, } @article{CardePolif14, title = {Combustion {Stability} {Analysis} of {Rocket} {Engines} with {Resonators} {Based} on {Nyquist} {Plots}}, volume = {30}, url = {http://arc.aiaa.org/doi/abs/10.2514/1.B35149}, doi = {10.2514/1.B35149}, number = {4}, journal = {Journal of Propulsion and Power}, author = {Cárdenas Miranda, A. and Polifke, W.}, year = {2014}, pages = {962--977}, file = {Carde+Polif13b.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GSRZ2M6F\\Carde+Polif13b.pdf:application/pdf;Cárdenas Miranda_Polifke_2014_Combustion Stability Analysis of Rocket Engines with Resonators Based on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FHZNU86Z\\Cárdenas Miranda_Polifke_2014_Combustion Stability Analysis of Rocket Engines with Resonators Based on.pdf:application/pdf}, } @inproceedings{FornePolif15, address = {Florence, Italy}, title = {Aero-{Acoustic} {Characterization} of {Helmholtz} {Resonators} in the {Linear} {Regime} with {System} {Identification}}, url = {http://iiav.org/archives_icsv_last/2015_icsv22/content/papers/papers/full_paper_596_20150401121136373.pdf}, booktitle = {22nd {International} {Congress} on {Sound} and {Vibration} ({ICSV22})}, author = {Förner, Kilian and Polifke, Wolfgang}, month = jul, year = {2015}, keywords = {MediaTUM, Rev'd}, file = {Förner and Polifke - 2015 - Aero-Acoustic Characterization of Helmholtz Resona.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9VR7FXHE\\Förner and Polifke - 2015 - Aero-Acoustic Characterization of Helmholtz Resona.pdf:application/pdf}, } @article{ForneTourn17, title = {Scattering to {Higher} {Harmonics} for {Quarter} {Wave} and {Helmholtz} {Resonators}}, volume = {55}, doi = {10.2514/1.J055295}, number = {4}, journal = {AIAA Journal}, author = {Förner, K. and Tournadre, J. and Martínez-Lera, P. and Polifke, W.}, year = {2017}, keywords = {MediaTUM}, pages = {1194--1204}, file = {Förner et al. - 2016 - Scattering to Higher Harmonics for Quarter Wave an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Q2RK3EJW\\Förner et al. - 2016 - Scattering to Higher Harmonics for Quarter Wave an.pdf:application/pdf}, } @phdthesis{Jaens17, type = {Ph.{D}. {Thesis}}, title = {On the efficient numerical modeling of nonlinear self-excited thermoacoustic oscillations}, school = {Technische Universität München}, author = {Jaensch, Stefan}, year = {2017}, file = {Jaensch_2017_On the efficient numerical modeling of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6P84FRDT\\Jaensch_2017_On the efficient numerical modeling of.pdf:application/pdf}, } @inproceedings{DuranPolif07a, address = {Montreal, Quebec, Canada}, series = {{ASME} {GT2007}-28188}, title = {Implementation of the {Thickened} {Flame} model for {Large} {Eddy} {Simulation} of turbulent premixed combustion in a commercial solver}, doi = {10.1115/GT2007-28188}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, author = {Durand, L. and Polifke, W.}, year = {2007}, keywords = {Combustion, Turbulence}, file = {Durand_Polifke_2007_Implementation of the Thickened Flame model for Large Eddy Simulation of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z4ZT2B9X\\Durand_Polifke_2007_Implementation of the Thickened Flame model for Large Eddy Simulation of.pdf:application/pdf}, } @phdthesis{Forne17, address = {München, Germany}, type = {Ph.{D}. {Thesis}}, title = {Nonlinear {Aeroacoustic} {Characterization} of {Resonators}}, url = {https://mediatum.ub.tum.de/doc/1360567/1360567.pdf}, language = {English}, school = {TU München}, author = {Förner, Kilian}, year = {2017}, file = {Förner_2017_Nonlinear Aeroacoustic Characterization.pdf:C\:\\Users\\niebl\\Zotero\\storage\\U23R63VW\\Förner_2017_Nonlinear Aeroacoustic Characterization.pdf:application/pdf}, } @article{TournForne17, title = {Determination of {Acoustic} {Impedance} for {Helmholtz} {Resonators} {Through} {Incompressible} {Unsteady} {Flow} {Simulations}}, volume = {55}, url = {http://dx.doi.org/10.2514/1.J055337}, doi = {10.2514/1.J055337}, number = {3}, journal = {AIAA Journal}, author = {Tournadre, J. and Förner, K. and Polifke, W. and Martínez-Lera, P. and Desmet, W.}, year = {2017}, keywords = {MediaTUM}, pages = {790--798}, file = {Tournadre et al. - 2016 - Determination of Acoustic Impedance for Helmholtz .pdf:C\:\\Users\\niebl\\Zotero\\storage\\57Z7ZWMM\\Tournadre et al. - 2016 - Determination of Acoustic Impedance for Helmholtz .pdf:application/pdf}, } @article{SilvaMerk18, title = {The intrinsic thermoacoustic feedback loop and its role on the acoustic scattering matrix}, volume = {submitted}, journal = {Combustion theory and modeling}, author = {Silva, C. F. and Merk, M. and Jaensch, S. and Polifke, W}, year = {2018}, keywords = {NonPerRev, submitted, rejected}, file = {Silva et al_2017_The autoregressive behavior of the intrinsic thermoacoustic feedback loop.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W492BZ83\\Silva et al_2017_The autoregressive behavior of the intrinsic thermoacoustic feedback loop.pdf:application/pdf}, } @phdthesis{collonval_modeling_2015, type = {{PhD} {Thesis}}, title = {Modeling of auto-ignition and {NOx} formation in turbulent reacting flows}, abstract = {The need of energy to sustain the development of humanity is dramatically increasing. Despite the growing importance of renewable energies, the avail- ability and maturity of the technology for combustion systems will result in the predominance of the fossil energy for the next 40 years. But in order to mitigate the global warming, new developments are needed to improve the efficiency of the combustors while keeping as low as possible the emis- sions. Among the unwanted species the nitrogen oxides known as NOx is of primary concern for combustor designers. This has been a challenge for decades. Therefore for a given nominal op- erating point the global efficiency is close to the ideal one. But for large combustion systems like gas turbines, the range of operating conditions is quite broad and will be broader with the continuous growth of the renew- able energy systems. Therefore the present challenge is to enlarge the range of operating conditions for which the system runs with high efficiency. Another challenge for the combustion devices is the development of bio-fuel at full or partial proportions. Their behaviors are quite different to the clas- sical fuels used up to now in motors. So the combustion models developed must be able to capture the high variability of the fuel composition and predict correctly the consequences in term of flames stability and emissions production. In those respects, the sequential combustion system as developed by Alstom Power’s GT 24/26 or Homogeneous-Charge Compression Ignition engine (HCCI) are interesting concepts. Unfortunately, the design and modeling of such system is quite complex as strong interactions between the turbulence and the chemistry are taking place, leading to no-ignition, self-ignition or even flash-back. A huge break-through has been achieved by applying Large-Eddy Simula- tions to combustion chambers. Indeed the exponential growth of compu- tational power made the transient simulations of realistic burners possible. Unfortunately the greater insight on the flow brought also a need for new turbulence-chemistry models and a revival of more efficient ways to deal with the accurate computation of the chemistry source terms. In this work the quality and accuracy of a new model proposed originally by R. Kulkarni [66] is assessed. The turbulence-chemistry model is based on the transport of the composition probability density function using Eulerian stochastic fields. The cost of the chemistry is radically reduced by storing the source terms in look-up tables. The latter part will be validated solely against simple configurations: homogeneous reactors, auto-igniting mixing layers and laminar premixed flames. Then the accuracy of the turbulence- chemistry model will be evaluated against auto-ignition configurations. Finally an extension of the model to predict emissions will be presented. The need of a dedicated model for the pollutant formation results of the different range of chemical time scales between the combustion and the pollutants chemistry, e.g. the thermal NOx. The model will be tested on homogeneous reactors and laminar premixed flames.}, school = {Technische Universität München}, author = {Collonval, F.}, year = {2015}, keywords = {Auto-ignition, Stochastic fields, emission prediction, LES methods, Combustion Modeling}, file = {Collonval_2015_Modeling of auto-ignition and NOx formation in turbulent reacting flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4NZ9AHEV\\Collonval_2015_Modeling of auto-ignition and NOx formation in turbulent reacting flows.pdf:application/pdf}, } @inproceedings{MeindMerk17, address = {Vienna}, title = {Determination of acoustic scattering matrices from linearized compressible flow equations}, booktitle = {Int. {Conf}. on {Theoretical} and {Computational} {Acoustics} {ICTCA} 2017}, author = {Meindl, Max and Merk, Malte and Fritz, Fabian and Polifke, Wolfgang}, month = jul, year = {2017}, keywords = {MediaTUM}, file = {Meindl et al. - 2017 - Determination of acoustic scattering matrices from.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Q9E8TZ54\\Meindl et al. - 2017 - Determination of acoustic scattering matrices from.pdf:application/pdf}, } @techreport{PolifAvdon18, title = {Thermoacoustic {Instabilities} and {Combustion} {Noise}}, number = {pr94ho}, institution = {Leibniz Rechenzentrum}, author = {Polifke, W. and Avdonin, A.}, year = {2018}, keywords = {published}, file = {CoolMUC2_additional_information.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GWJPQFLJ\\CoolMUC2_additional_information.pdf:application/pdf;Polifke and Avdonin - 2018 - Thermoacoustic Instabilities and Combustion Noise.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HJK5YADB\\Polifke and Avdonin - 2018 - Thermoacoustic Instabilities and Combustion Noise.pdf:application/pdf;Report.odt:C\:\\Users\\niebl\\Zotero\\storage\\57S34UTM\\Report.odt:application/vnd.oasis.opendocument.text}, } @inproceedings{HuberPolif07, title = {Time-domain {Impedance} {Boundary} {Conditions} for {Computational} {Fluid} {Dynamics}}, booktitle = {2nd {GACM} {Colloquim} on {Computational} {Mechanics}}, publisher = {2nd GACM Colloquim on Computational Mechanics, 10.-12. October, Munich, Germany}, author = {Huber, A. and Polifke, W.}, year = {2007}, keywords = {CFD, inverse z-transformation, time-domain boundary conditions}, } @article{KulkaZellh13, series = {2}, title = {{LES} {Based} {Investigation} of {Autoignition} in {Turbulent} {Co}-flow {Configurations}}, volume = {17}, url = {http://www.tandfonline.com/eprint/CYKtnA6emtmaKTdIxiBR/full}, doi = {10.1080/13647830.2012.739711}, journal = {Combustion Theory and Modelling}, author = {Kulkarni, R. and Zellhuber, M. and Polifke, W.}, year = {2013}, pages = {224--259}, file = {Kulkarni et al_2013_LES Based Investigation of Autoignition in Turbulent Co-flow Configurations.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FZR7XJZ3\\Kulkarni et al_2013_LES Based Investigation of Autoignition in Turbulent Co-flow Configurations.pdf:application/pdf}, } @article{KulkaPolif12a, title = {{LES} of {Delft}-{Jet}-{In}-{Hot}-{Coflow} ({DJHC}) with {Tabulated} {Chemistry} and {Stochastic} {Fields} {Combustion} {Model}}, volume = {107}, url = {https://www.sciencedirect.com/science/article/pii/S0378382012002275?via%3Dihub}, doi = {10.1016/j.fuproc.2012.06.015}, journal = {Fuel Processing Technology}, author = {Kulkarni, R.M. and Polifke, W.}, year = {2013}, keywords = {MediaTUM, Tabulated chemistry, LES, Stochastic fields, MILD combustion}, pages = {138--146}, file = {Kulkarni_Polifke_2013_LES of Delft-Jet-In-Hot-Coflow (DJHC).pdf:C\:\\Users\\niebl\\Zotero\\storage\\NSUF6D6Y\\Kulkarni_Polifke_2013_LES of Delft-Jet-In-Hot-Coflow (DJHC).pdf:application/pdf}, } @incollection{SovarPolif16, series = {Notes on {Numerical} {Fluid} {Mechanics} and {Multidisciplinary} {Design}}, title = {Identification of {Sound} {Sources} in {Ducted} {Flows} with an {LES}-{SI}-{DMD} {Approach}: {Influence} of {Mesh} {Refinement} and {Subgrid} {Scale} {Models}}, copyright = {©2016 Springer International Publishing Switzerland}, isbn = {978-3-319-27278-8}, shorttitle = {Identification of {Sound} {Sources} in {Ducted} {Flows} with an {LES}-{SI}-{DMD} {Approach}}, url = {http://link.springer.com/chapter/10.1007/978-3-319-27279-5_66}, abstract = {A novel computational approach for the prediction of aeroacoustic sources based on Large Eddy Simulation and System Identification is presented. The objective is to characterize concurrently both the scattering of acoustic waves and the generation of noise at flow discontinuity in a duct. The methodology is outlined and applied to an orifice placed inside a pipe with turbulent flow. Results for the passive acoustic scattering are compared with experiment. The noise sources obtained from LES with and without an external acoustic excitation are compared for a variety of simulation settings. The influences of mesh resolution and of the subgrid scale models are investigated. Flow features responsible for noise generation are educed with dynamic mode decomposition.}, language = {en}, number = {132}, urldate = {2016-04-03}, booktitle = {New {Results} in {Numerical} and {Experimental} {Fluid} {Mechanics} {X}}, publisher = {Springer International Publishing}, author = {Sovardi, Carlo and Polifke, Wolfgang}, editor = {Dillmann, Andreas and Heller, Gerd and Krämer, Ewald and Wagner, Claus and Breitsamter, Christian}, year = {2016}, doi = {10.1007/978-3-319-27279-5_66}, keywords = {Fluid- and Aerodynamics, CFD, Aerospace Technology and Astronautics, Transportation Technology and Traffic Engineering}, pages = {755--765}, file = {Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\6ZD8N5BH\\978-3-319-27279-5_66.html:text/html;Sovardi_Polifke_2016_Identification of Sound Sources in Ducted Flows with an LES-SI-DMD Approach.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D4JBRF6D\\Sovardi_Polifke_2016_Identification of Sound Sources in Ducted Flows with an LES-SI-DMD Approach.pdf:application/pdf}, } @inproceedings{KulkaBunku14, address = {Düsseldorf, Germany}, series = {{GT2014}-26053}, title = {Large {Eddy} {Simulation} of {ALSTOM}’s {Reheat} {Combustor} using {Tabulated} {Chemistry} and {Stochastic} {Fields} {Combustion} {Model}}, doi = {10.1115/GT2014-26053}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2014}, author = {Kulkarni, Rohit and Bunkute, Birute and Biagioli, Fernando and Düsing, Michael and Polifke, Wolfgang}, year = {2014}, keywords = {MediaTUM}, file = {Kulkarni et al_2014_Large Eddy Simulation of ALSTOM’s Reheat Combustor using Tabulated Chemistry.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GZ7VIAVA\\Kulkarni et al_2014_Large Eddy Simulation of ALSTOM’s Reheat Combustor using Tabulated Chemistry.pdf:application/pdf}, } @phdthesis{Kulka13, type = {{PhD} {Thesis}}, title = {Large {Eddy} {Simulation} of {Autoignition} in {Turbulent} {Flows}}, school = {TU München}, author = {Kulkarni, Rohit Madhukar}, year = {2013}, file = {Kulkarni - 2013 - Large Eddy Simulation of Autoignition in Turbulent.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GD3H4RZB\\Kulkarni - 2013 - Large Eddy Simulation of Autoignition in Turbulent.pdf:application/pdf}, } @inproceedings{BrandPolif03, address = {Atlanta, GA, U.S.A.}, series = {{ASME} 2003-{GT}-38224}, title = {Auto-{Ignition} in a {Gas} {Turbine} {Burner} at {Elevated} {Temperature}}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, author = {Brandt, M. and Polifke, W. and Ivancic, B. and Flohr, P. and Paikert, B.}, month = jun, year = {2003}, keywords = {Combustion, Turbulence, Auto-ignition, Rev'd, Self-ignition, Gasturbine}, file = {Brandt et al_2003_Auto-Ignition in a Gas Turbine Burner at Elevated Temperature.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4KZZ2RNP\\Brandt et al_2003_Auto-Ignition in a Gas Turbine Burner at Elevated Temperature.pdf:application/pdf}, } @inproceedings{GentePolif04a, address = {Köln-Porz}, title = {Flammen-{Transferfunktionen} basierend auf transienter {CFD} und {Systemidentifikation}}, booktitle = {9. {Statusseminar} der {AG} {Turbo} -- {Verbundprojekt} für ein {CO}$_{\textrm{2}}$-armes {Kraftwerk} ''500 {MW} auf einer {Welle}''}, author = {Gentemann, A. M. G. and Polifke, W. and Flohr, P. and Schuermans, B. and Krebs, W. and Lepers, J.}, month = dec, year = {2004}, keywords = {Thermo-acoustics, Frequency response}, file = {Gentemann et al_2004_Flammen-Transferfunktionen basierend auf transienter CFD und.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S3JNDSBZ\\Gentemann et al_2004_Flammen-Transferfunktionen basierend auf transienter CFD und.pdf:application/pdf}, } @inproceedings{Polif04b, address = {Nieuwegein, The Netherlands}, title = {Mechanisms of flame-acoustics interaction in premix burners}, booktitle = {Combura 2004}, publisher = {STW, NVV, Dutch section of the Combustion Institute.}, author = {Polifke, W.}, month = mar, year = {2004}, keywords = {Stability, Thermo-acoustics, Premixed flame}, annote = {The following values have no corresponding Zotero field:PB - in: Advances in Aeroacoustics and ApplicationsT3 - Von Karman InstituteCY - Brussels, BE}, file = {Polifke_2004_Mechanisms of flame-acoustics interaction in premix burners.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DNNMVMNE\\Polifke_2004_Mechanisms of flame-acoustics interaction in premix burners.pdf:application/pdf}, } @inproceedings{Polif10c, address = {Chennai, India}, title = {Thermo-{Acoustic} {System} {Modelling} and {Stability} {Analysis}: {Conventional} {Approaches}}, url = {www.slideshare.net/Polifke/iitm10key}, booktitle = {Workshop ''{Advanced} {Instability} {Methods}''}, publisher = {Indo-European network on Advanced Instability Methods}, author = {Polifke, W.}, month = jan, year = {2010}, keywords = {Stability, Thermo-acoustics, Low order model}, file = {Polifke_2009_Thermo-Acoustic System Modelling and Stability Analysis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MUN9E44M\\Polifke_2009_Thermo-Acoustic System Modelling and Stability Analysis.pdf:application/pdf}, } @inproceedings{Polif12a, address = {IIT Madras, Chennai, India}, title = {Dynamics of {Turbulent} {Swirling} {Flames}}, url = {http://www.scribd.com/doc/59432194}, author = {Polifke, W.}, month = jan, year = {2012}, keywords = {Stability, Thermo-acoustics, Low order model}, } @incollection{Polif11d, address = {Rhode-St-Genèse, BE}, series = {{VKI} {LS} 2011-01}, title = {Non-normality and non-linearity in aero- and thermo-acoustic systems}, booktitle = {Advances in {Aero}-{Acoustics} and {Thermo}-{Acoustics}}, publisher = {Van Karman Inst for Fluid Dynamics., Rhode-St-Genèse, Belgium}, author = {Polifke, W.}, editor = {Schram, C.}, year = {2011}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, file = {Polifke_2011_Non-normality and non-linearity in aero- and thermo-acoustic systems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CJR6Q5CA\\Polifke_2011_Non-normality and non-linearity in aero- and thermo-acoustic systems.pdf:application/pdf}, } @inproceedings{IurasCampa15, address = {Florence, Italy}, title = {Turbulent {Flame} {Models} for {Prediction} of {Pressure} {Oscillations} in {Gas} {Turbine} {Burners}}, url = {http://www.scm.keele.ac.uk/Tango/wp-content/uploads/2015/PlannedPub/ICSV22%20paper%20by%20Dmytro%20Iurashev.pdf}, urldate = {2015-09-21}, booktitle = {22nd {International} {Congress} on {Sound} and {Vibration} ({ICSV22})}, author = {Iurashev, Dmytro and Campa, Giovanni and Anisimov, Vyacheslav and Di Vita, Andrea and Cosatto, Ezio and Daccà, Federico and Albayrak, Alp}, year = {2015}, file = {Iurashev et al. - 2015 - TURBULENT FLAME MODELS FOR PREDICTION OF PRES-SURE.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WWUINWT5\\Iurashev et al. - 2015 - TURBULENT FLAME MODELS FOR PREDICTION OF PRES-SURE.pdf:application/pdf}, } @techreport{GiauqPoins08, address = {Toulouse, France}, title = {Validation of a {Flame} {Tranfer} {Function} {Reconstruction} {Method} for {Complex} {Turbulent} {Configurations}}, url = {http://www.cerfacs.fr/~cfdbib/repository/TR_CFD_08_12.pdf}, institution = {CERFACS}, author = {Giauque, A. and Poinsot, T. and Polifke, W. and Nicoud, F.}, year = {2008}, file = {Giauque et al_2008_Validation of a Flame Tranfer Function Reconstruction Method for Complex.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VHTGH4EE\\Giauque et al_2008_Validation of a Flame Tranfer Function Reconstruction Method for Complex.pdf:application/pdf}, } @inproceedings{MangePolif10, address = {Munich, Germany}, title = {A simple state-space approach for modelling non-normal effects in thermoacoustic systems}, booktitle = {n3l -- {Non}-{Normal} and {Nonlinear} {Effects} in {Aero}- and {Thermoacoustics}}, publisher = {TU München}, author = {Mangesius, H. and Polifke, W.}, month = may, year = {2010}, file = {Mangesius_Polifke_2010_A simple state-space approach for modelling non-normal effects in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MQSETCMH\\Mangesius_Polifke_2010_A simple state-space approach for modelling non-normal effects in.pdf:application/pdf}, } @inproceedings{HuberRoman08, address = {Berlin, Germany}, series = {{ASME} {GT2008}-51195}, title = {Filter-{Based} {Time}-{Domain} {Impedance} {Boundary} {Conditions} for {CFD} {Applications}}, doi = {10.1115/GT2008-51195}, booktitle = {{ASME} {Turbo} {Expo} 2008}, author = {Huber, Andreas and Romann, P. and Polifke, Wolfgang}, year = {2008}, keywords = {Combustion, Turbulence}, pages = {901--911}, file = {Huber et al_2008_Filter-Based Time-Domain Impedance Boundary Conditions for CFD Applications.pdf:C\:\\Users\\niebl\\Zotero\\storage\\N66HWPIB\\Huber et al_2008_Filter-Based Time-Domain Impedance Boundary Conditions for CFD Applications.pdf:application/pdf}, } @inproceedings{MerkJaens16, address = {Montreal, Canada}, title = {On {Hydrodynamic} {Effects} {During} {Self}-{Excited} {Thermoacoustic} {Oscillations}}, booktitle = {24th {ICTAM} conference}, author = {Merk, Malte and Jaensch, Stefan and Polifke, Wolfgang}, year = {2016}, keywords = {MediaTUM}, file = {128689_Merk_ShortTalk.pptx:C\:\\Users\\niebl\\Zotero\\storage\\5UXPJ3WQ\\128689_Merk_ShortTalk.pptx:application/vnd.openxmlformats-officedocument.presentationml.presentation;160810_Merk_Poster.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CR9D5JDJ\\160810_Merk_Poster.pdf:application/pdf;Merk et al. - 2016 - On Hydrodynamic Effects During Self-Excited Thermo.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G5NXSGWF\\Merk et al. - 2016 - On Hydrodynamic Effects During Self-Excited Thermo.pdf:application/pdf}, } @inproceedings{LangJaens16, address = {Menaggio, Italy}, title = {Large {Eddy} {Simulation} of {Equivalence} {Ratio} {Fluctuations} in a {Technically} {Premixed} {Swirl} {Combustor} with {Acoustic} {Excitation}}, booktitle = {{CDCN2} - {Second} {Colloquium} on {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Lang, Christian and Jaensch, Stefan and Albayrak, Alp and Oberleithner, Kilian and Polifke, Wolfgang}, year = {2016}, file = {Lang et al. -2016 - Large Eddy Simulation of Equivalence Ratio Fluctuations in a Technically Premixed Swirl Combustor with Acoustic Excitation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F8ZP4ADK\\Lang et al. -2016 - LARGE EDDY SIMULATION OF EQUIVALENCE RATIO FLUCTUATIONS IN.pdf.pdf:application/pdf}, } @inproceedings{JaensMerk15, address = {Garching, Germany}, title = {Hybrid {CFD}/ low order modeling of thermoacoustic limit cycles}, booktitle = {{SFB}/{TRR} 40 – {Summer} {Program} {Report} 2015}, author = {Jaensch, Stefan and Merk, Malte and Gopalakrishnan, E. and Bomberg, S. and Emmert, T. and Sujith, R I and Polifke, Wolfgang}, editor = {Stemmer, C. and {Adams, N. A.} and {Haidn O.J.} and {Radespiel, R.} and {Sattelmayer, T.} and {Schröder, W.} and {Weigand, B.}}, year = {2015}, keywords = {MediaTUM}, file = {Jaensch et al_2015_Hybrid CFD- low order modeling of thermoacoustic limit cycles.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K7DFWR8B\\Jaensch et al_2015_Hybrid CFD- low order modeling of thermoacoustic limit cycles.pdf:application/pdf}, } @inproceedings{SovarJaens14, title = {Identification of {Sound} {Sources} in {Internal} {Ducted} {Flows}: {A} {Large} {Eddy} {Simulation}–{System} {Identification} {Approach}.}, url = {http://iiav.org/icsv21/content/papers/papers/full_paper_575_20140318102340869.pdf}, urldate = {2014-11-18}, booktitle = {21st {International} {Congress} on {Sound} and {Vibration} ({ICSV21})}, author = {Sovardi, Carlo and Jaensch, Stefan and Silva, Camilo and Polifke, Wolfgang}, year = {2014}, keywords = {NonPerRev}, file = {Sovardi et al_2014_Identification of Sound Sources in Internal Ducted Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZRVSJC62\\Sovardi et al_2014_Identification of Sound Sources in Internal Ducted Flows.pdf:application/pdf}, } @inproceedings{SilvaJaens15, address = {Florence, Italy}, title = {On the autoregressive behavior of the intrinsic thermoacoustic feedback loop observed in premixed flames}, booktitle = {22nd {International} {Congress} on {Sound} and {Vibration} ({ICSV22})}, author = {Silva, C. F. and Jaensch, S. and Emmert, T. and Polifke, W}, year = {2015}, keywords = {NonPerRev}, file = {Silva et al_2015_On the autoregressive behavior of the intrinsic thermoacoustic feedback loop.pdf:C\:\\Users\\niebl\\Zotero\\storage\\76URBQEU\\Silva et al_2015_On the autoregressive behavior of the intrinsic thermoacoustic feedback loop.pdf:application/pdf}, } @phdthesis{Brand16, type = {Bachelor's {Thesis}}, title = {Simulation of {Self} {Sustained} {Thermoacoustic} {Oscillations} by {Coupling} of a {Low}-{Order} {Acoustic} {Network} {Model} with a {Level}-{Set} {Solver}}, language = {English}, school = {Technische Universität München}, author = {Brandl, Markus}, year = {2016}, note = {Betreuer. Steinbacher}, file = {Brandl_2016_Simulation of Self Sustained Thermoacoustic Oscillations by Coupling of a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DPTXSPS5\\Brandl_2016_Simulation of Self Sustained Thermoacoustic Oscillations by Coupling of a.pdf:application/pdf}, } @techreport{PolifHoek97, address = {Baden, Switzerland}, title = {Basic {Equations} and {Numerical} {Tools} for {Linear} {Acoustics} in {Gas} {Turbines}}, institution = {ABB Corporate Research}, author = {Polifke, W. and Hoek, J. v. d. and Verhaar, B.}, year = {1997}, keywords = {Stability, Thermo-acoustics, Low order model, Acoustics, Combustion dynamics, transfer matrix}, file = {Polifke et al_1997_Basic Equations and Numerical Tools for Linear Acoustics in Gas Turbines.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R2SVJZIW\\Polifke et al_1997_Basic Equations and Numerical Tools for Linear Acoustics in Gas Turbines.pdf:application/pdf}, } @inproceedings{SchmiBlume13a, address = {San Antonio, TX, USA}, series = {{GT2013}-95459}, title = {Quantitative {Stability} {Analysis} {Using} {Real} {Frequency} {Response} {Data}}, doi = {10.1115/1.4025299}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2013}, author = {Schmid, Martin and Blumenthal, Ralf and Schulze, Moritz and Polifke, Wolfgang and Sattelmayer, Thomas}, year = {2013}, annote = {Caution! Sign error in equations (1), (2) and (3)! Corrections: d RF / d omega = - d IF / d lambda d RF / d lambda = d IF / d omega d{\textasciicircum}2 RF / d lambda{\textasciicircum}2 = - d{\textasciicircum}2 RF / d omega{\textasciicircum}2 easy to check with n-tau flame.}, file = {Schmid et al_2013_Quantitative Stability Analysis Using Real Frequency Response Data.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XIQR66JZ\\Schmid et al_2013_Quantitative Stability Analysis Using Real Frequency Response Data.pdf:application/pdf}, } @article{BrandGhara04, series = {1-2}, title = {Modellierung von {Mischung} und {Reaktion} in turbulenten {Mehrphasenströmungen} mittels {Verteilungsfunktion}}, volume = {76}, number = {01/Feb}, journal = {Chem. Ing. Technik}, author = {Brandt, M and Gharaibah, E and Polifke, W}, year = {2004}, keywords = {multi-phase flow, Turbulence, Simulation + Modelling}, pages = {46--51}, file = {Brandt et al_2004_Modellierung von Mischung und Reaktion in turbulenten Mehrphasenströmungen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KJIISM6H\\Brandt et al_2004_Modellierung von Mischung und Reaktion in turbulenten Mehrphasenströmungen.pdf:application/pdf}, } @article{JasorWacke14, series = {4}, title = {Modeling artifacts in the simulation of the sedimentation of raindrops with a {Quadrature} {Method} of {Moments}}, volume = {23}, url = {http://dx.doi.org/10.1127/0941-2948/2014/0590}, doi = {10.1127/0941-2948/2014/0590}, journal = {Meteorologische Zeitschrift}, author = {Jasor, Gary and Wacker, Ulrike and Beheng, Klaus Dieter and Polifke, Wolfgang}, year = {2014}, keywords = {multi-phase flow, Population Balance}, pages = {369--385}, file = {Jasor et al_2014_Modeling artifacts in the simulation of the sedimentation of raindrops with a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HCGFJS43\\Jasor et al_2014_Modeling artifacts in the simulation of the sedimentation of raindrops with a.pdf:application/pdf}, } @incollection{GharaPolif03, title = {Bubbly {Flows}}, booktitle = {Bubbly {Flows}}, publisher = {Springer Verlag}, author = {Gharaibah, E. and Polifke, W.}, editor = {Sommerfeld, M.}, year = {2003}, keywords = {multi-phase flow, Turbulence, Simulation + Modelling}, pages = {295--306}, file = {Gharaibah_Polifke_2003_Bubbly Flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2P7DP296\\Gharaibah_Polifke_2003_Bubbly Flows.pdf:application/pdf}, } @article{PolifBrand05, title = {Modeling of mixing and reaction in turbulent multi-phase flows with distribution functions}, volume = {28}, number = {6}, journal = {Chem. Eng. Technol.}, author = {Polifke, W and Brandt, M and Gharaibah, E}, year = {2005}, keywords = {Fluid Dynamics, multi-phase flow, Turbulence}, pages = {654--659}, file = {Polifke et al_2005_Modeling of mixing and reaction in turbulent multi-phase flows with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KMPDFRM3\\Polifke et al_2005_Modeling of mixing and reaction in turbulent multi-phase flows with.pdf:application/pdf}, } @article{MukhoJasor12, title = {Simulation of {Pure} {Sedimentation} of {Raindrops} using {Quadrature} {Method} of {Moments}}, volume = {106}, url = {http://www.sciencedirect.com/science/article/pii/S0169809511003875}, doi = {doi:10.1016/j.atmosres.2011.11.008}, journal = {J. Atmospheric Research}, author = {Mukhopadhyay, Achintya and Jasor, Gary and Polifke, Wolfgang}, year = {2012}, keywords = {multi-phase flow, Population Balance}, pages = {61--70}, file = {Mukhopadhyay et al_2012_Simulation of Pure Sedimentation of Raindrops using Quadrature Method of Moments.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CEMSX2GK\\Mukhopadhyay et al_2012_Simulation of Pure Sedimentation of Raindrops using Quadrature Method of Moments.pdf:application/pdf}, } @inproceedings{GharaBrand02, address = {Karlsruhe, Germany}, title = {A {Numerical} {Model} of {Dispersed} {Two} {Phase} {Flows} in {Aerated} {Stirred} {Vessels} {Based} on {Presumed} {Shape} {Number} {Density} {Functions}}, booktitle = {German-{Japanese} {Workshop} on {Multi}-{Phase} {Flow}}, publisher = {Forschungszentrum Karlsruhe GmbH}, author = {Gharaibah, E. and Brandt, M. and Polifke, W.}, month = aug, year = {2002}, keywords = {multi-phase flow, Simulation + Modelling, Unrev'd}, pages = {E1--E10}, file = {Gharaibah et al_2002_A Numerical Model of Dispersed Two Phase Flows in Aerated Stirred Vessels Based.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CERPU7MV\\Gharaibah et al_2002_A Numerical Model of Dispersed Two Phase Flows in Aerated Stirred Vessels Based.pdf:application/pdf}, } @article{JaensMerk17, title = {Hybrid {CFD}/{Low}-{Order} {Modeling} of {Nonlinear} {Thermoacoustic} {Oscillations}}, volume = {36}, issn = {15407489}, url = {http://linkinghub.elsevier.com/retrieve/pii/S1540748916303959}, doi = {10.1016/j.proci.2016.08.006}, language = {en}, number = {3}, urldate = {2017-02-07}, journal = {Proceedings of the Combustion Institute}, author = {Jaensch, S. and Merk, M. and Gopalakrishnan, E.A. and Bomberg, S. and Emmert, T. and Sujith, R.I. and Polifke, W.}, year = {2017}, keywords = {MediaTUM}, pages = {3827--3834}, file = {Jaensch et al_2017_Hybrid CFD-low-order modeling of nonlinear thermoacoustic oscillations.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4A7WZAUR\\Jaensch et al_2017_Hybrid CFD-low-order modeling of nonlinear thermoacoustic oscillations.pdf:application/pdf}, } @inproceedings{AlbayPolif15, address = {Florence, Italy}, title = {On the {Propagation} {Velocity} of {Swirl} {Waves} in {Annular} {Flows}}, isbn = {978-88-88942-48-3}, url = {http://www.scm.keele.ac.uk/Tango/wp-content/uploads/2015/PlannedPub/ICSV22%20paper%20by%20Alp%20Albayrak.pdf}, urldate = {2015-08-20}, booktitle = {22nd {Int}. {Congress} on {Sound} and {Vibration} ({ICSV22})}, publisher = {IIAV}, author = {Albayrak, Alp and Polifke, Wolfgang}, year = {2015}, keywords = {MediaTUM}, file = {Albayrak and Polifke - 2015 - On the propagation velocity of swirl waves in annu.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IIP2TCJ2\\Albayrak and Polifke - 2015 - On the propagation velocity of swirl waves in annu.pdf:application/pdf}, } @techreport{Evesq02, title = {Acoustic energy density and fluxes - {Application} to spinning and azimuthally standing modes in an annular combustor}, institution = {TU München}, author = {Evesque, Stéphanie}, month = dec, year = {2002}, file = {Evesque_2002_Acoustic energy density and fluxes - Application to spinning and azimuthally.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9NIZDQJT\\Evesque_2002_Acoustic energy density and fluxes - Application to spinning and azimuthally.pdf:application/pdf}, } @phdthesis{Kopit07, type = {{PhD} {Thesis}}, title = {Kombinierte {Anwendung} von {Strömungssimulation}, {Netzwerkmodellierung} und {Regelungstechnik} zur {Vorhersage} thermoakustischer {Instabilitäten}}, school = {TU München}, author = {Kopitz, J.}, year = {2007}, keywords = {Stability, Thermo-acoustics, Control, Low order model}, annote = {Extracted Annotations (Tue 19 Aug 2014 01:20:25 PM CEST) Solution Rankine Hugoniot time domain (note on p.176)  }, file = {Kopitz - 2007 - Kombinierte Anwendung von Strömungssimulation, Net.pdf:C\:\\Users\\niebl\\Zotero\\storage\\72DRX397\\Kopitz - 2007 - Kombinierte Anwendung von Strömungssimulation, Net.pdf:application/pdf;Kopitz - 2007 - Kombinierte Anwendung von Strömungssimulation, Netzwerkmodellierung und Regelungstechnik zur Vorhersage thermoakustisc-annotated.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TZNEIPA5\\Kopitz - 2007 - Kombinierte Anwendung von Strömungssimulation, Netzwerkmodellierung und Regelungstechnik zur Vorhersage thermoakustisc-a.pdf:application/pdf}, } @article{Tay-WPolif13, title = {Large {Eddy} {Simulation}-{Based} {Study} of the {Influence} of {Thermal} {Boundary} {Condition} and {Combustor} {Confinement} on {Premix} {Flame} {Transfer} {Functions}}, volume = {135}, url = {http://link.aip.org/link/?GTP/135/021502/1}, doi = {10.1115/1.4007734}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Tay-Wo-Chong, Luis and Polifke, Wolfgang}, year = {2013}, pages = {021502}, file = {Tay-Wo-Chong_Polifke_2013_Large Eddy Simulation-Based Study of the Influence of Thermal Boundary.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EZ89KGW6\\Tay-Wo-Chong_Polifke_2013_Large Eddy Simulation-Based Study of the Influence of Thermal Boundary.pdf:application/pdf}, } @article{SarghFelic03, title = {Neural networks based subgrid scale modeling in large eddy simulations}, volume = {32}, issn = {0045-7930}, url = {http://www.sciencedirect.com/science/article/pii/S0045793001000986}, doi = {10.1016/S0045-7930(01)00098-6}, abstract = {In this paper a multilayer feed-forward neural network (NN) is used as subgrid scale (SGS) model in a large eddy simulation (LES). The NN was previously off-line trained using numerical data generated by a LES of a channel flow at Reτ=180 with Bardina's scale similar (BFR) SGS model. Results show the ability of NNs to identify and reproduce the highly nonlinear behavior of the turbulent flows, and therefore the possibility of using NN techniques in numerical simulations of turbulent flows.}, number = {1}, urldate = {2018-08-20}, journal = {Computers \& Fluids}, author = {Sarghini, F. and de Felice, G. and Santini, S.}, month = jan, year = {2003}, keywords = {machine learning, LES, Neural Network, Subgrid scale (SGS)}, pages = {97--108}, file = {Sarghini et al. - 2003 - Neural networks based subgrid scale modeling in la.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7YT284G7\\Sarghini et al. - 2003 - Neural networks based subgrid scale modeling in la.pdf:application/pdf}, } @incollection{LingKurza17, series = {{AIAA} {AVIATION} {Forum}}, title = {Data-driven {Adaptive} {Physics} {Modeling} for {Turbulence} {Simulations}}, url = {https://arc.aiaa.org/doi/10.2514/6.2017-3627}, urldate = {2018-08-20}, booktitle = {23rd {AIAA} {Computational} {Fluid} {Dynamics} {Conference}}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Ling, Julia and Kurzawski, Andrew}, month = jun, year = {2017}, doi = {10.2514/6.2017-3627}, keywords = {machine learning, Turbulence, RANS}, file = {Ling and Kurzawski - 2017 - Data-driven Adaptive Physics Modeling for Turbulen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PIMN3MX6\\Ling and Kurzawski - 2017 - Data-driven Adaptive Physics Modeling for Turbulen.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\WPVK46PG\\6.html:text/html}, } @inproceedings{CaeirSovar16, address = {Garching, Germany}, title = {Shape {Optimization} of a {Helmholtz} {Resonator} using the {Adjoint} {Method}}, booktitle = {Int. {Symp}. on {Thermoacoustic} {Instabilities} in {Gas} {Turbines} and {Rocket}}, author = {Caeiro, F. and Sovardi, C. and Förner, K. and Polifke, W.}, month = jun, year = {2016}, file = {Caeiro et al. - 2016 - Acoustic Shape Optimisation of a Helmholtz Resonat.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z5CF5DQE\\Caeiro et al. - 2016 - Acoustic Shape Optimisation of a Helmholtz Resonat.pdf:application/pdf}, } @inproceedings{KomarPolif09, address = {Orlando, FL, U.S.A.}, series = {{ASME} {GT2009}-60100}, title = {Impact of {Swirl} {Fluctuations} on the {Flame} {Response} of a {Perfectly} {Premixed} {Swirl} {Burner}}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, author = {Komarek, T. and Polifke, W.}, month = jun, year = {2009}, keywords = {Thermoacoustics, Swirl, Premixed flame, Frequency response, Rev'd}, file = {Komarek_Polifke_2009_Impact of Swirl Fluctuations on the Flame Response of a Perfectly Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZWTNEAWD\\Komarek_Polifke_2009_Impact of Swirl Fluctuations on the Flame Response of a Perfectly Premixed.pdf:application/pdf}, } @inproceedings{HuberPolif08, address = {Berlin}, series = {{GT2008}-51193}, title = {Impact of {Fuel} {Supply} {Impedance} on {Combustion} {Stability} of {Gas} {Turbines}}, doi = {10.1115/GT2008-51193}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, publisher = {ASME}, author = {Huber, A. and Polifke, W.}, year = {2008}, keywords = {Combustion, Turbulence}, file = {Huber_Polifke_2008_Impact of Fuel Supply Impedance on Combustion Stability of Gas Turbines.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4HR6TX73\\Huber_Polifke_2008_Impact of Fuel Supply Impedance on Combustion Stability of Gas Turbines.pdf:application/pdf}, } @article{LacomFolle13, title = {Identification of aero-acoustic scattering matrices from large eddy simulation: {Application} to whistling orifices in duct}, volume = {332}, issn = {0022-460X}, url = {http://www.sciencedirect.com/science/article/pii/S0022460X13003751}, doi = {http://dx.doi.org/10.1016/j.jsv.2013.04.036}, abstract = {Abstract The identification of the aero-acoustic scattering matrix of an orifice in a duct is achieved by computational fluid dynamics. The methodology first consists in performing a large eddy simulation of a turbulent compressible flow, with superimposed broadband acoustic excitations. After extracting time series of acoustic data with a specific filter, system identification techniques are applied. They allow us to determine the components of the acoustic scattering matrix of the orifice. Following the same procedure, a previous paper determines the scattering features of a sudden area expansion. In the present paper, the focus is on whistling orifices. The whistling ability of the tested orifice is evaluated by deriving the acoustic power balance from the scattering matrix. Comparisons with experiments at two different Mach numbers show a good agreement. The potential whistling frequency range is well predicted in terms of frequency and amplitude.}, number = {20}, journal = {Journal of Sound and Vibration}, author = {Lacombe, R. and Föller, S. and Jasor, G. and Polifke, W. and Aurégan, Y. and Moussou, P.}, year = {2013}, pages = {5059 -- 5067}, file = {Lacombe et al_2013_Identification of Aero-Acoustic Scattering Matrices from Large Eddy Simulation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JSZMZFMT\\Lacombe et al_2013_Identification of Aero-Acoustic Scattering Matrices from Large Eddy Simulation.pdf:application/pdf}, } @article{SovarJaens16, title = {Concurrent {Identification} of {Aero}-acoustic {Scattering} and {Noise} {Sources} at a {Flow} {Duct} {Singularity} in low {Mach} {Number} {Flow}}, volume = {377}, doi = {10.1016/j.jsv.2016.05.025}, journal = {J. Sound Vibration}, author = {Sovardi, Carlo and Jaensch, Stefan and Polifke, Wolfgang}, year = {2016}, keywords = {PerRev}, pages = {90--105}, file = {Sovardi et al. - 2016 - Concurrent Identification of Aero-acoustic Scatter.pdf:C\:\\Users\\niebl\\Zotero\\storage\\U6MTABTC\\Sovardi et al. - 2016 - Concurrent Identification of Aero-acoustic Scatter.pdf:application/pdf}, } @inproceedings{SovarPolif15, address = {Maastricht, The Netherlands}, title = {Acoustic characterisation of double-orifice configurations by means of a {LES}-{SI} approach}, abstract = {A numerical study of the aeroacoustic properties of a pair of orifices placed in a duct is here presented. Two geometric configurations with two different distances in between the orifices have been analysed to consider conditions with or without tonal noise sources. A Large Eddy Simulation has been performed and validated with respect to experimental measurements for both aerodynamic and acoustic predictions. Data series from an acoustically excited LES have been post-processed through System Identification techniques to concurrently model noise sources and acoustic scattering matrix. The model of the noise obtained has been used as validation to confirm the good prediction of the acoustic scattering.}, booktitle = {Euronoise 2015 -- 10th {European} {Congress} and {Exposition} on {Noise} {Control} {Engineering}}, publisher = {European Acoustics Association}, author = {Sovardi, Carlo and Polifke, Wolfgang}, month = jun, year = {2015}, file = {Sovardi and Polifke - 2015 - Acoustic characterisation of double-orifice config.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TYJXSLQC\\Sovardi and Polifke - 2015 - Acoustic characterisation of double-orifice config.pdf:application/pdf}, } @article{PolifGeng98, title = {Optimization of {Rate} {Coefficients} for {Simplified} {Reaction} {Mechanisms} with {Genetic} {Algorithms}}, volume = {113}, url = {http://www.sciencedirect.com/science/article/pii/S0010218097002125}, doi = {10.1016/S0010-2180(97)00212-5}, number = {1-2}, journal = {Combust. and Flame}, author = {Polifke, W. and Geng, W. and Döbbeling, K.}, year = {1998}, keywords = {Combustion, Reaction kinetics, CFD, Rev'd}, pages = {119--134}, file = {Polifke et al_1998_Optimization of Rate Coefficients for Simplified Reaction Mechanisms with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FSXP22TV\\Polifke et al_1998_Optimization of Rate Coefficients for Simplified Reaction Mechanisms with.pdf:application/pdf}, } @article{BlumeTangi17, title = {A systems perspective on non-normality in low-order thermoacoustic models: full norms, semi-norms and transient growth}, volume = {9}, doi = {10.1177/1756827716652474}, number = {1}, journal = {Int. J. Spray Combust. Dyn.}, author = {Blumenthal, R.S. and Tangirala, A.K. and Sujith, R.I. and Polifke, W.}, year = {2017}, keywords = {MediaTUM}, pages = {19--43}, file = {Blumenthal et al_2017_A systems perspective on non-normality in low-order thermoacoustic models.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JJX663BE\\Blumenthal et al_2017_A systems perspective on non-normality in low-order thermoacoustic models.pdf:application/pdf}, } @inproceedings{EmmerJaens14, address = {Krakow}, title = {{taX} - a {Flexible} {Tool} for {Low}-{Order} {Duct} {Acoustic} {Simulation} in {Time} and {Frequency} {Domain}}, url = {http://www.fa2014.agh.edu.pl}, booktitle = {7th {Forum} {Acusticum}}, publisher = {DEGA}, author = {Emmert, Thomas and Jaensch, Stefan and Sovardi, Carlo and Polifke, Wolfgang}, month = sep, year = {2014}, keywords = {NonPerRev}, file = {Emmert et al_2014_taX - a Flexible Tool for Low-Order Duct Acoustic Simulation in Time and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\766G8R94\\Emmert et al_2014_taX - a Flexible Tool for Low-Order Duct Acoustic Simulation in Time and.pdf:application/pdf}, } @mastersthesis{Meind15, address = {Garching, Germany}, title = {Evaluierung von {Zustandsraummodellen} linearer akustischer {Felder} mit {COMSOL}}, school = {TU München}, author = {Meindl, Max}, month = may, year = {2015}, file = {Meindl - 2015 - Evaluierung von Zustandsraummodellen linearer akus.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P3SFRKGB\\Meindl - 2015 - Evaluierung von Zustandsraummodellen linearer akus.pdf:application/pdf}, } @inproceedings{HolziCarde10, address = {Stockholm, Sweden}, series = {{AIAA} 2010-3891}, title = {An {Analytical} {Solution} for {Acoustic} {Wave} {Propagation} in a {Narrow} {Duct} with {Mean} {Temperature} {Gradient}}, volume = {3891}, url = {http://arc.aiaa.org/doi/pdf/10.2514/6.2010-3891}, urldate = {2016-01-05}, booktitle = {16th {AIAA}/{CEAS} {Aeroacoustics} {Conference}, number {AIAA}}, author = {Holzinger, Tobias and Cárdenas, Alejandro and Polifke, Wolfgang}, year = {2010}, file = {Holzi+Carde+10.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7M4FJ7V7\\Holzi+Carde+10.pdf:application/pdf}, } @techreport{Polifvand97, address = {Baden, Switzerland}, title = {Everything you always wanted to know about f and g}, institution = {Technical Report of ABB Corporate Research}, author = {Polifke, Wolfgang and van der Hoek, J and Verhaar, B}, year = {1997}, pages = {85}, file = {Polifke et al_1997_Everything you always wanted to know.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6IA3C7GW\\Polifke et al_1997_Everything you always wanted to know.pdf:application/pdf}, } @inproceedings{ForneTemiz15, address = {Florence, Italy}, title = {On the {Non}-{Linear} {Influence} of the {Edge} {Geometry} on {Vortex} {Shedding} in {Helmholtz} {Resonators}}, url = {http://iiav.org/archives_icsv_last/2015_icsv22/content/papers/papers/full_paper_1341_20150325133515128.pdf}, booktitle = {22nd {International} {Congress} on {Sound} and {Vibration} ({ICSV22})}, author = {Förner, Kilian and Temiz, Muttalip Askın and Polifke, Wolfgang and Lopez Arteaga, Inez and Hirschberg, Avraham}, month = jul, year = {2015}, keywords = {MediaTUM}, file = {Kilian Förner et al_2015_On the non-linear Influence of the Edge Geometry on Vortex Shedding in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VI8TAMW5\\Kilian Förner et al_2015_On the non-linear Influence of the Edge Geometry on Vortex Shedding in.pdf:application/pdf}, } @incollection{ForneTourn15, title = {Characterization of the {Nonlinear} {Response} of a {Helmholtz} {Resonator}}, url = {http://www.sfbtr40.de/fileadmin/Annual-Reports/annualreport2015/annualreport-2015-a3.pdf}, booktitle = {{SFB}/{TRR40} {Annual} {Report} 2015}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Förner, K. and Tournadre, J. and Martínez-Lera, P. and Polifke, W.}, editor = {Adams, N. A. and Radespiel, R. and Sattelmayer, T. and Schröder, W. and Weigand, B.}, year = {2015}, keywords = {MediaTUM}, pages = {33 -- 45}, file = {Förner et al. - 2015 - Characterization of the Nonlinear Response of a He.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QHN2CPIV\\Förner et al. - 2015 - Characterization of the Nonlinear Response of a He.pdf:application/pdf}, } @inproceedings{FolleSelim08, address = {Berlin, Germany}, title = {Linear {Identification} of the {Unsteady} {Heat} {Transfer} of a {Cylinder} in {Pulsating} {Crossflow}}, booktitle = {Int. {Conf}. on {Jets}, {Wakes} and {Separated} {Flows}}, publisher = {Technical University Berlin}, author = {Föller, S. and Selimefendigil, F. and Polifke, W.}, year = {2008}, keywords = {Fluid Dynamics, Turbulence, LES, Mixing}, file = {Foell+Selim+08.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RHAVUZNR\\Foell+Selim+08.pdf:application/pdf}, } @inproceedings{Polif11e, address = {Chennai, India}, title = {System {Identification} for {Thermoacoustic} {Instabilities}}, url = {www.slideshare.net/Polifke/iitm10key}, booktitle = {Workshop ''{Advanced} {Instability} {Methods}''}, publisher = {Indo-European network on Advanced Instability Methods}, author = {Polifke, W.}, month = jan, year = {2011}, } @incollection{Polif11g, address = {Rhode-St-Genèse, BE}, series = {{VKI} {LS} 2011-01}, title = {System {Identification} for {Aero}- and {Thermo}-{Acoustic} {Applications}}, booktitle = {Advances in {Aero}-{Acoustics} and {Thermo}-{Acoustics}}, publisher = {Von Karman Institute}, author = {Polifke, W.}, editor = {Schram, C.}, year = {2011}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, pages = {1--46}, file = {Polifke_2011_System Identification for Aero- and Thermo-Acoustic Applications.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HPSKBTC8\\Polifke_2011_System Identification for Aero- and Thermo-Acoustic Applications.pdf:application/pdf}, } @inproceedings{Polif06a, address = {Wiesbaden, Germany}, title = {Divide et {Impera} -- {Combining} {CFD}, system identification and system modelling to analyse thermo-acoustic combustion instabilities}, booktitle = {3. {NAFEMS} {CFD}-{Seminar}: ''{Simulation} gekoppelter {Strömungsvorgänge} ({Multifield} {FSI})''}, publisher = {NAFEMS}, author = {Polifke, W.}, year = {2006}, file = {Polifke_2006_Divide et Impera -- Combining CFD, system identification and system modelling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I9I2C8AR\\Polifke_2006_Divide et Impera -- Combining CFD, system identification and system modelling.pdf:application/pdf}, } @inproceedings{Polif12c, title = {Black-box system identification for reduced order model construction}, booktitle = {Dresden {Scientific} {Workshop} {On} {Reactor} {Dynamics} {And} {Safety}}, author = {Polifke, W.}, month = sep, year = {2012}, } @inproceedings{Polif05, address = {Toulouse, Frankreich}, title = {System identification for acoustic analysis of combustors}, booktitle = {Large {Eddy} {Simulation} and {Acoustic} {Analysis} {Tools} for {Unsteady} {Combustion}}, publisher = {CERFACS / FLUISTCOM}, author = {Polifke, W.}, month = may, year = {2005}, } @inproceedings{Polif14c, address = {TU München, Garching, Germany}, title = {Applications of {System} {Identification} in {Aero}- and {Thermoacoustics}}, booktitle = {{FlowAirs} {Workshop} ''{System} {Identification}''}, author = {Polifke, Wolfgang}, month = may, year = {2014}, } @techreport{LeandHuber10, title = {{taX} - a {Low}-{Order} {Modeling} {Tool} for {Thermo}- and {Aero}-{Acoustic} {Instabilities}}, url = {http://www.td.mw.tum.de/tum-td/en/forschung/infrastruktur/scientific_comp}, institution = {TU München}, author = {Leandro, Robert and Huber, Andreas and Polifke, Wolfgang}, year = {2010}, file = {Leandro et al_2010_taX - a Low-Order Modeling Tool for Thermo- and Aero-Acoustic Instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AS4B83E9\\Leandro et al_2010_taX - a Low-Order Modeling Tool for Thermo- and Aero-Acoustic Instabilities.pdf:application/pdf}, } @inproceedings{Tay-WPolif12, address = {Copenhagen, DK}, series = {{GT2012}-68796}, title = {{LES}-{Based} {Study} of the {Influence} of {Thermal} {Boundary} {Condition} and {Combustor} {Confinement} on {Premix} {Flame} {Transfer} {Functions}}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2012}, author = {Tay-Wo-Chong, Luis and Polifke, Wolfgang}, year = {2012}, file = {Tay-Wo-Chong_Polifke_2012_LES-based Study of the Influence of Thermal Boundary Condition and Combustor.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BRGTPJP7\\Tay-Wo-Chong_Polifke_2012_LES-based Study of the Influence of Thermal Boundary Condition and Combustor.pdf:application/pdf}, } @phdthesis{Strob16, type = {Ph.{D}. {Thesis}}, title = {Scattering and {Generation} of {Acoustic} and {Entropy} {Waves} across {Moving} and {Fixed} {Heat} {Sources}}, url = {http://mediatum.ub.tum.de?id=1326486}, school = {TU München}, author = {Strobio Chen, Lin}, year = {2016}, file = {Strobio Chen_2016_Scattering and Generation of Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HJIT32ZZ\\Strobio Chen_2016_Scattering and Generation of Acoustic.pdf:application/pdf}, } @inproceedings{GenteHirsc04, address = {Vienna, Austria}, series = {{GT2004}-53776}, title = {Validation of {Flame} {Transfer} {Function} {Reconstruction} for {Perfectly} {Premixed} {Swirl} {Flames}}, volume = {Volum 1: Turbo Expo 2004}, isbn = {978-0-7918-4166-2}, doi = {10.1115/GT2004-53776}, booktitle = {{ASME} {Turbo} {Expo} 2004: {Power} for {Land}, {Sea}, and {Air}}, publisher = {ASME}, author = {Gentemann, A and Hirsch, C and Kunze, K and Kiesewetter, F and Sattelmayer, T and Polifke, W}, year = {2004}, keywords = {Thermoacoustics, Simulation + Modelling, Rev'd}, pages = {501--510}, file = {Gentemann et al_2004_Validation of Flame Transfer Function Reconstruction for Perfectly Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UK76P48D\\Gentemann et al_2004_Validation of Flame Transfer Function Reconstruction for Perfectly Premixed.pdf:application/pdf}, } @inproceedings{Polif07a, address = {Rhode-St-Genèse, BE}, series = {{VKI} {LS} 2007-02}, title = {System modelling and stability analysis}, booktitle = {Basics of {Aero}-{Acoustics} and {Thermo}-{Acoustics}}, publisher = {Von Karman Institute}, author = {Polifke, W.}, month = dec, year = {2007}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, file = {Polifke_2007_System modelling and stability analysis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B42HVUAT\\Polifke_2007_System modelling and stability analysis.pdf:application/pdf}, } @article{HuHassa11, series = {1-3}, title = {Performance analysis and optimization of direct contact condensation in a {PCM} fixed bed regenerator}, volume = {280}, journal = {Desalination}, author = {Hu, T. and Hassabou, A. H. and Spinnler, M. and Polifke, W.}, month = oct, year = {2011}, pages = {232--243}, file = {Hu et al_2011_Performance analysis and optimization of direct contact condensation in a PCM.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KKGKHEVK\\Hu et al_2011_Performance analysis and optimization of direct contact condensation in a PCM.pdf:application/pdf}, } @article{KulkaPolif12, series = {Article {ID} 780370}, title = {Large {Eddy} {Simulation} of auto-ignition in a turbulent hydrogen jet flame using a progress variable approach}, volume = {2012}, url = {http://www.hindawi.com/journals/jc/2012/780370/}, doi = {doi:10.1155/2012/780370}, journal = {J. of Combustion}, author = {Kulkarni, R. and Polifke, W.}, year = {2012}, pages = {1--11}, file = {Kulkarni_Polifke_2012_Large Eddy Simulation of auto-ignition in a turbulent hydrogen jet flame using.pdf:C\:\\Users\\niebl\\Zotero\\storage\\69W4KKMG\\Kulkarni_Polifke_2012_Large Eddy Simulation of auto-ignition in a turbulent hydrogen jet flame using.pdf:application/pdf}, } @phdthesis{Sovar16, address = {Garching, Germany}, type = {Ph.{D}. {Thesis}}, title = {Identification of {Sound} {Sources} in {Duct} {Singularities}}, school = {TU München}, author = {Sovardi, Carlo}, year = {2016}, file = {Sovardi_2016_Identification of Sound Sources in Duct Singularities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KCU7CT47\\Sovardi_2016_Identification of Sound Sources in Duct Singularities.pdf:application/pdf}, } @phdthesis{Gente06, address = {Munich, Germany}, type = {{PhD} {Thesis}}, title = {Identifikation von akustischen {Transfermatrizen} und {Flammenfrequenzgängen} mittels {Strömungssimulation}}, school = {Technische Universität München}, author = {Gentemann, A. M. G.}, year = {2006}, keywords = {Combustion, Thermo-acoustics, Premixed flame, Frequency response}, file = {Gentemann - 2006 - Identifikation von akustischen Transfermatrizen un.pdf:C\:\\Users\\niebl\\Zotero\\storage\\32D6FMSV\\Gentemann - 2006 - Identifikation von akustischen Transfermatrizen un.pdf:application/pdf}, } @inproceedings{BlumeTangi13, address = {Munich, Germany}, title = {A {Contribution} to the {Discussion} on {Thermoacoustic} {Energy} from a {Systemic} {Perspective}}, booktitle = {n3l {Workshop} on {Non}-{Normal} and {Nonlinear} {Effects} in {Aero}- and {Thermoacoustics}}, author = {Blumenthal, Ralf S. and Tangirala, Arun K. and Sujith, R.I. and Polifke, Wolfgang}, month = jun, year = {2013}, file = {Blumenthal et al_2013_A Contribution to the Discussion on Thermoacoustic Energy from a Systemic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ISTGEQ8N\\Blumenthal et al_2013_A Contribution to the Discussion on Thermoacoustic Energy from a Systemic.pdf:application/pdf}, } @inproceedings{Ling15, title = {Using {Machine} {Learning} to {Understand} and {Mitigate} {Model} {Form} {Uncertainty} in {Turbulence} {Models}}, doi = {10.1109/ICMLA.2015.38}, abstract = {The question of how to accurately model turbulent flows is one of the most long-standing open problems in physics. Advances in high performance computing have enabled direct numerical simulations of increasingly complex flows. Nevertheless, for most flows of engineering relevance, the computational cost of these direct simulations is prohibitive, necessitating empirical model closures for the turbulent transport. These empirical models are prone to "model form uncertainty" when their underlying assumptions are violated. Understanding, quantifying, and mitigating this model form uncertainty has become a critical challenge in the turbulence modeling community. This paper will discuss strategies for using machine learning to understand the root causes of the model form error and to develop model corrections to mitigate this error. Rule extraction techniques are used to derive simple rules for when a critical model assumption is violated. The physical intuition gained from these simple rules is then used to construct a linear correction term for the turbulence model which shows improvement over naive linear fits.}, booktitle = {2015 {IEEE} 14th {International} {Conference} on {Machine} {Learning} and {Applications} ({ICMLA})}, author = {Ling, J.}, month = dec, year = {2015}, keywords = {machine learning, Analytical models, mechanical engineering computing, turbulent transport, Uncertainty, Predictive models, Anisotropic magnetoresistance, Computational modeling, critical model assumption, Decision trees, direct numerical simulations, empirical model closures, high performance computing, learning (artificial intelligence), linear correction term, model form uncertainty mitigation, parallel processing, rule extraction, rule extraction technique, turbulence, turbulence modeling, turbulent flow modelling, Vegetation}, pages = {813--818}, file = {Ling - 2015 - Using Machine Learning to Understand and Mitigate .pdf:C\:\\Users\\niebl\\Zotero\\storage\\63AUB4TU\\Ling - 2015 - Using Machine Learning to Understand and Mitigate .pdf:application/pdf}, } @inproceedings{BaronLing17, address = {Denver, Colorado}, title = {Machine {Learning} {Models} of {Errors} in {Large} {Eddy} {Simulation} {Predictions} of {Surface} {Pressure} {Fluctuations}}, isbn = {978-1-62410-500-5}, url = {https://arc.aiaa.org/doi/10.2514/6.2017-3979}, doi = {10.2514/6.2017-3979}, abstract = {We investigate a novel application of deep neural networks to modeling of errors in prediction of surface pressure fluctuations beneath a compressible, turbulent flow. In this context, the truth solution is given by Direct Numerical Simulation (DNS) data, while the predictive model is a wall-modeled Large Eddy Simulation (LES). The neural network pro- vides a means to map relevant statistical flow-features within the LES solution to errors in prediction of wall pressure spectra. We simulate a number of flat plate turbulent boundary layers using both DNS and wall-modeled LES to build up a database with which to train the neural network. We then apply machine learning techniques to develop an optimized neural network model for the error in terms of relevant flow features.}, language = {en}, urldate = {2018-02-27}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Barone, Matthew F. and Ling, Julia and Chowdhary, Kenny and Davis, Warren and Fike, Jeffrey}, month = jun, year = {2017}, keywords = {machine learning}, file = {Barone et al. - 2017 - Machine Learning Models of Errors in Large Eddy Si.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8FZX4C5Q\\Barone et al. - 2017 - Machine Learning Models of Errors in Large Eddy Si.pdf:application/pdf}, } @article{FrankChatz17, title = {Tabulation of combustion chemistry via {Artificial} {Neural} {Networks} ({ANNs}): {Methodology} and application to {LES}-{PDF} simulation of {Sydney} flame {L}}, volume = {185}, issn = {0010-2180}, shorttitle = {Tabulation of combustion chemistry via {Artificial} {Neural} {Networks} ({ANNs})}, url = {http://www.sciencedirect.com/science/article/pii/S0010218017302596}, doi = {10.1016/j.combustflame.2017.07.014}, abstract = {In this work, a methodology for the tabulation of combustion mechanisms via Artificial Neural Networks (ANNs) is presented. The objective of the methodology is to train the ANN using samples generated via an abstract problem, such that they span the composition space of a family of combustion problems. The abstract problem in this case is an ensemble of laminar flamelets with an artificial pilot in mixture fraction space to emulate ignition, of varying strain rate up to well into the extinction range. The composition space thus covered anticipates the regions visited in a typical simulation of a non-premixed flame. The ANN training consists of two-stage process: clustering of the composition space into subdomains using the Self-Organising Map (SOM) and regression within each subdomain via the multilayer Perceptron (MLP). The approach is then employed to tabulate a mechanism of CH4–air combustion, based on GRI 1.2 and reduced via Rate-Controlled Constrained Equilibrium (RCCE) and Computational Singular Perturbation (CSP). The mechanism is then applied to simulate the Sydney flame L, a turbulent non-premixed flame that features significant levels of local extinction and re-ignition. The flow field is resolved through Large Eddy Simulation (LES), while the transported probability density function (PDF) approach is employed for modelling the turbulence–chemistry interaction and solved numerically via the stochastic fields method. Results demonstrate reasonable agreement with experiments, indicating that the SOM-MLP approach provides a good representation of the composition space, while the great savings in CPU time allow for a simulation to be performed with a comprehensive combustion model, such as the LES-PDF, with modest CPU resources such as a workstation.}, urldate = {2018-03-05}, journal = {Combustion and Flame}, author = {Franke, Lucas L. C. and Chatzopoulos, Athanasios K. and Rigopoulos, Stelios}, month = nov, year = {2017}, note = {FrankeChatz17}, keywords = {machine learning, PDF methods, Artificial Neural Network (ANN), Mechanism tabulation, RCCE}, pages = {245--260}, file = {Franke et al. - 2017 - Tabulation of combustion chemistry via Artificial .pdf:C\:\\Users\\niebl\\Zotero\\storage\\3DJXJ467\\Franke et al. - 2017 - Tabulation of combustion chemistry via Artificial .pdf:application/pdf;ScienceDirect Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\EJI3V26J\\S0010218017302596.html:text/html}, } @article{Farzi15, title = {Prediction of phase equilibria in binary systems containing acetone using artificial neural network}, url = {https://www.ijser.org/paper/Prediction-of-phase-equilibria-in-binary-systems-containing-acetone-using-artificial-neural-network.html}, abstract = {In this paper, phase equilibrium of eleven binary systems containing acetone is estimated using artificial neural networks (ANN). VLE data were taken from literature for wide ranges of temperature (298.15-391.25K) and pressure (2.640 to 101.33kPa). Based on obtained results, the best structure for ANN is feed-forward network with sigmoid and linear activation functions for hidden and output layers, respectively. The network consists of seven inputs for temperature, pressure, acentric factor, critical temperature and critical pressure of the system, 19 neurons in hidden layer and two neurons in output layer corresponding to vapor and liquid compositions of acetone in binary mixture. The weights were optimized to minimize error between calculated and experimental VLE data using Levenberg-Marquardt back propagation training algorithm. Results show that optimum network architecture is able to predict equilibrium data of binary systems containing acetone with an acceptable level of accuracy AAD \% of 0.815, and R2 of 0.9979.}, urldate = {2018-03-05}, journal = {International Journal of Scientific and Engineering Research}, author = {Farzi, Ali and Nejad, Ali}, year = {2016}, note = {Citation Key: FarziNejad}, keywords = {machine learning}, file = {Prediction of phase equilibria in binary systems containing acetone using artificial neural network:C\:\\Users\\niebl\\Zotero\\storage\\5G3LH5KW\\Prediction-of-phase-equilibria-in-binary-systems-containing-acetone-using-artificial-neural-net.html:text/html;Prediction-of-phase-equilibria-in-binary-systems-containing-acetone-using-artificial-neural-network.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HNJDUULU\\Prediction-of-phase-equilibria-in-binary-systems-containing-acetone-using-artificial-neural-network.pdf:application/pdf}, } @article{FabreBala11, title = {Development of a new dynamic procedure for the {Clark} model of the subgrid-scale scalar flux using the concept of optimal estimator}, volume = {23}, issn = {1070-6631}, url = {http://aip.scitation.org/doi/abs/10.1063/1.3657090}, doi = {10.1063/1.3657090}, number = {11}, urldate = {2018-03-05}, journal = {Physics of Fluids}, author = {Fabre, Y. and Balarac, G.}, month = nov, year = {2011}, note = {Citation Key: FabreBalar11}, keywords = {machine learning}, pages = {115103}, file = {Full Text PDF:C\:\\Users\\niebl\\Zotero\\storage\\6NLRLVAT\\Fabre and Balarac - 2011 - Development of a new dynamic procedure for the Cla.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\F6N9IUQU\\1.html:text/html}, } @incollection{IhmeMarsd06, title = {On the optimization of articial neural networks for application to the approximation of chemical systems}, booktitle = {Center for {Turbulence} {Research}: {Annual} {Research} {Briefs} 2006}, author = {Ihme, Matthias and Marsden, Alison}, year = {2006}, note = {Citation Key: IhmePitsch06}, keywords = {machine learning}, file = {Ihme et al. - 2006 - On the optimization of artificial neural networks .pdf:C\:\\Users\\niebl\\Zotero\\storage\\3W3B44QB\\Ihme et al. - 2006 - On the optimization of artificial neural networks .pdf:application/pdf}, } @phdthesis{Beekman16, title = {Using artificial neural networks as unresolved-scale models for the {Burgers} equation}, language = {English}, school = {Delft}, author = {Beekman, Matthijs}, month = nov, year = {2016}, keywords = {machine learning}, file = {Beekman - 2016 - Using artificial neural networks as unresolved-sca.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NG5EBK6F\\Beekman - 2016 - Using artificial neural networks as unresolved-sca.pdf:application/pdf}, } @phdthesis{Berge17, address = {Garching, Germany}, title = {Modeling the {Generation} of {Entropy} {Waves} of a {Technically} {Premixed} {Swirl} {Burner} {Setup}}, language = {English}, school = {Technische Universität München}, author = {Berger, Anne}, year = {2017}, file = {Thesis_Berger2017.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8MKUMHEC\\Thesis_Berger2017.pdf:application/pdf}, } @article{HosseKorni18a, title = {Intrinsic thermoacoustic modes and their interplay with acoustic modes in a {Rijke} burner}, volume = {10}, issn = {1756-8277, 1756-8285}, doi = {10.1177/1756827718782884}, language = {en}, number = {4}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Hosseini, Naseh and Kornilov, Viktor and Lopez Arteaga, Inez and Polifke, Wolfgang and Teerling, Omke and de Goey, L.P.H.}, month = dec, year = {2018}, keywords = {MediaTUM*}, pages = {315--325}, file = {Hosseini et al_2018_Intrinsic Thermoacoustic Modes and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VENEW59E\\Hosseini et al_2018_Intrinsic Thermoacoustic Modes and.pdf:application/pdf}, } @incollection{PolifMerk18, address = {Garching, Germany}, title = {Determination of {Combustion} {Dynamics} and {Combustion} {Noise} in a {Confined} {Turbulent} {Swirl} {Combustor}}, booktitle = {High {Performance} {Computing} in {Science} and {Engineering} – {Garching}/{Munich}}, author = {Polifke, W. and Merk, M.}, editor = {Bastian, P. and Kranzlmüller, D. and Brüchle, H. and Brehm, M.}, year = {2018}, keywords = {published, MediaTUM, NonPerRev}, pages = {162--163}, file = {PolifMerk18.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5TY7GQIT\\PolifMerk18.pdf:application/pdf}, } @inproceedings{MagriYu19, address = {Aachen, Germany}, title = {Statistical learning by data assimilation in reacting flows}, abstract = {The time-accurate calculation of reacting flows and combustion instabilities is challenging because of (i) aleatoric uncertainty, such as stochastic noise; (ii) model uncertainty, i.e., models rely on simplified reacting-flow equations, low spatial resolution, and reduced chemical mechanisms; and (iii) high sensitivity to initial/boundary conditions and parameters. Statistical learning enables the improvement of the predictive capabilities of our models by assimilating information from other more accurate models or experiments. Statistical learning algorithms are presented to make reduced-order thermoacoustic and flame models quantitatively accurate. First, we apply constrained Lagrangian optimization to assimilate data in a nonlinear time-delayed model of a ducted flame. Second, we propose a method to time-accurately estimate the position of the flame front of a premixed flame by assimilating data from high-fidelity simulations with the ensemble Kalman filter. An ad-hoc algorithm is proposed to assimilate data with a reduced-order level set method both for state and parameter estimation. Third, data is assimilated in a turbulent reacting flow of MILD combustion to predict the occurrence of auto-ignited spots with under-resolved simulations. Statistical learning by data assimilation opens up new possibilities for on-the-fly calibration of reduced-order models and enhancement of the accuracy of predictive tools.}, booktitle = {{NC19} - {Seventeenth} {Int}'l {Conf}. on {Numerical} {Combustion}}, author = {Magri, Luca and Yu, Hans and Juniper, Matthew and Polifke, Wolfgang and Doan, Nguyen Anh Khoa}, month = may, year = {2019}, keywords = {MediaTUM}, } @inproceedings{SchulGaudr19, address = {Aachen, Germany}, title = {Identification of {Combustion} {Noise} and {Flame} {Dynamics} of {Confined} {Turbulent} {Flames}. {Part} {I}: {Methodology}}, abstract = {For confined turbulent flames, two contributions to combustion noise can be distinguished: Firstly, turbulent fluctuations generate broad-band fluctuations of the heat release, which act as a source of noise. Secondly, the flame responds in a dynamic manner to impinging acoustic waves, as described by the flame transfer function (FTF). In general, sound pressure levels in a combustor are governed not only by the noise sources, but also the flame dynamics. Moreover, determination of the noise source terms requires knowledge of the flame dynamics, and vice versa. Thus comprehensive thermo-acoustic characterization of confined turbulent flames requires to determine both the noise source as well as the FTF. In a joint project funded by ANR/AFG methods were developed that allow the concurrent determination of the combustion noise source and the flame dynamics by combining advanced system identification techniques with large eddy simulation. Both flame dynamics and combustion noise are represented in terms of input and output variables with distributed delays (Box-Jenkins model structure). By incorporating the identified models into a linear acoustic model of a combustor, linear stability margins, combustor dynamics and sound pressure distributions may be predicted. Result were validated against experimental data for a turbulent, premixed swirl burner with very satisfactory agreement. An interpretation of peaks in the spectral distribution of combustion noise in terms of cavity resonances and acoustic-flame coupling could be developed.}, booktitle = {{NC19} {Seventeenth} {International} {Conference} on {Numerical} {Combustion}}, author = {Schuller, T. and Gaudron, R. and Gatti, M. and Mirat, C. and Merk, M. and Silva, C.F. and Jaensch, S. and Polifke, W.}, year = {2019}, keywords = {MediaTUM, Abstract only}, file = {Schuller et al_2019_Identification of Combustion Noise and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HJEGWYH4\\Schuller et al_2019_Identification of Combustion Noise and.pdf:application/pdf}, } @inproceedings{PolifMerk19, address = {Aachen, Germany}, title = {Identification of {Combustion} {Noise} and {Flame} {Dynamics} of {Confined} {Turbulent} {Flames}. {Part} {II}: {Identification} of flame dynamics and combustion noise source terms}, abstract = {For confined turbulent flames, two contributions to combustion noise can be distinguished: Firstly, turbulent fluctuations generate broad-band fluctuations of the heat release, which act as a source of noise. Secondly, the flame responds in a dynamic manner to impinging acoustic waves, as described by the flame transfer function (FTF). In general, sound pressure levels in a combustor are governed not only by the noise sources, but also the flame dynamics. Moreover, determination of the noise source terms requires knowledge of the flame dynamics, and vice versa. Thus comprehensive thermo-acoustic characterization of confined turbulent flames requires to determine both the noise source as well as the FTF. In a joint project funded by ANR/AFG methods were developed that allow the concurrent determination of the combustion noise source and the flame dynamics by combining advanced system identification techniques with large eddy simulation. Both flame dynamics and combustion noise are represented in terms of input and output variables with distributed delays (Box-Jenkins model structure). By incorporating the identified models into a linear acoustic model of a combustor, linear stability margins, combustor dynamics and sound pressure distributions may be predicted. Result were validated against experimental data for a turbulent, premixed swirl burner with very satisfactory agreement. An interpretation of peaks in the spectral distribution of combustion noise in terms of cavity resonances and acoustic-flame coupling could be developed.}, booktitle = {{NC19} {Seventeenth} {International} {Conference} on {Numerical} {Combustion}}, author = {Polifke, W. and Merk, M. and Silva, C.F. and Jaensch, S. and Gaudron, R. and Gatti, M. and Mirat, C. and Schuller, T.}, year = {2019}, keywords = {MediaTUM, Abstract only}, file = {Polifke et al_2019_Identification of Combustion Noise and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H8BA9UMW\\Polifke et al_2019_Identification of Combustion Noise and.pdf:application/pdf}, } @inproceedings{GuoSilva19, address = {Phoenix, USA}, series = {{GT2019}-90732}, title = {Efficient {Robust} {Design} for {Thermoacoustic} {Instability} {Analysis}: {A} {Gaussian} {Process} {Approach}}, author = {Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, month = jun, year = {2019}, keywords = {MediaTUM, Archived}, file = {GT2019-90732.pdf:C\:\\Users\\niebl\\Zotero\\storage\\X86NIZGB\\GT2019-90732.pdf:application/pdf}, } @inproceedings{LeandPolif12, address = {Vilnius, Lithuania}, title = {Low-{Order} {Modelling} of {Distributed} {Heat} {Release}}, booktitle = {19th {Int}. {Congress} on {Sound} and {Vibration}}, publisher = {Int'l Inst. of Acoustics and Vibration}, author = {Leandro, Robert and Polifke, Wolfgang}, year = {2012}, file = {Leandro_Polifke_2012_Low-Order Modelling of Distributed Heat Release.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CFFVBB5X\\Leandro_Polifke_2012_Low-Order Modelling of Distributed Heat Release.pdf:application/pdf}, } @phdthesis{Haeri16, address = {München}, type = {Semesterarbeit}, title = {Experimentelle {Untersuchung} zur {Erweiterung} des {Teillastbereiches} einer stationären {Gasturbine} mit {Vormischbrenner}}, abstract = {The increasing supply of fluctuating power from renewable energy sources to the grid needs a more and more flexible operation especially of combined cycle power plants. An important issue, influencing the flexibility of combined cycle power plants, is the part load capacity of the used gas turbines. Utilizing lean premixed combustion in modern gas turbines allows to comply with the emis- sion limits. But in comparison with the formerly used systems with non-premixed combustion, such combustion systems have a poor part load capacity. After presenting the fundamentals of combustion, the theoretical background of this fact is explained. Thereby the focus is on the formation of pollutants and the occurrence of combustion instabilities, especially in lean premixed combustion. The objective of this thesis is to determine the operating limits of lean premixed combustion particular at the gas turbines of GuD2 in the Heizkraftwerk Süd of Stadtwerke München and, if possible, to push these limits. After getting exact knowledge of the operation limits, the minimum possible power with lean premixed combustion should be lowered. Due to continuous monitoring of the combustion system, safety margins of the turbine manufacturer can be used for extending the part load operating range. For this purpose, several experiments are realized at the gas turbines within this thesis. The experiments consist of lowering the power in the premixed mode below the normal operating range after carrying out modifications in the gas turbine control system. The results show great potential for extending the part load operating range, but also possible hazards due to the occurrence of combustion instabilities. Finally, a concept to extend permanently the part load operating range at the examined gas turbines is presented.}, language = {German}, school = {TU München}, author = {Haeringer, Matthias}, month = jun, year = {2016}, note = {Betreuer: Merk, Malte}, file = {Haeringer - 2016 - Experimentelle Untersuchung zur Erweiterung des Te.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9YASLTBP\\Haeringer - 2016 - Experimentelle Untersuchung zur Erweiterung des Te.pdf:application/pdf}, } @mastersthesis{mccartney_michael_optimisation_2017, address = {London, UK}, title = {Optimisation of {Rocket} {Injectors} using {Artificial} {Neural} {Networks}}, school = {Imperial College}, author = {McCartney, Michael}, year = {2017}, file = {McCartney, Michael_2017_Optimisation of Rocket Injectors using.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5DVZ4RNR\\McCartney, Michael_2017_Optimisation of Rocket Injectors using.pdf:application/pdf}, } @techreport{merk_final_2019, address = {München, Germany}, title = {Final {Report} on {Project} pr94yu}, author = {Merk, Malte}, year = {2019}, pages = {10}, file = {Merk_2019_Final Report on Project pr94yu.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WWFP6CTT\\Merk_2019_Final Report on Project pr94yu.pdf:application/pdf}, } @techreport{avdonin_flame_2018, title = {Flame displacement derived from the linearized reactive flow}, institution = {TU München}, author = {Avdonin, Alexander}, year = {2018}, file = {180308_TeleconferenceWIthSchuermans.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9AWUXK6L\\180308_TeleconferenceWIthSchuermans.pdf:application/pdf;Avdonin_2018_Flame displacement derived from the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WMBMED9X\\Avdonin_2018_Flame displacement derived from the.pdf:application/pdf}, } @inproceedings{PaschSchue99, address = {Indianapolis, Indiana, USA}, series = {{ASME} 99-{GT}-133}, title = {Measurement of transfer matrices and source terms of premixed flames}, booktitle = {Int'l {Gas} {Turbine} and {Aeroengine} {Congress} \& {Exposition}}, publisher = {ASME}, author = {Paschereit, C. O. and Schuermans, B. B. H. and Polifke, W. and Mattson, O.}, year = {1999}, keywords = {Thermoacoustics, Premixed flame, Rev'd}, file = {Paschereit et al_1999_Measurement of transfer matrices and source terms of premixed flames.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B6KFZRPI\\Paschereit et al_1999_Measurement of transfer matrices and source terms of premixed flames.pdf:application/pdf}, } @article{LawnPolif04, title = {A {Model} for the {Thermoacoustic} {Response} of a {Premixed} {Swirl} {Burner}, {Part} {II}: {The} {Flame} {Response}}, volume = {176}, issn = {0010-2202, 1563-521X}, url = {http://www.tandfonline.com/doi/abs/10.1080/00102200490461623}, doi = {10.1080/00102200490461623}, language = {en}, number = {8}, urldate = {2016-01-05}, journal = {Combustion Science and Technology}, author = {Lawn, C. J. and Polifke, W.}, month = aug, year = {2004}, keywords = {Thermo-acoustics, Low order model, Turbulence, Premixed flame, Convective Waves}, pages = {1359--1390}, file = {Lawn_Polifke_2004_A Model for the Thermo-Acoustic Response of a Premixed Swirl Burner.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZMPISRFF\\Lawn_Polifke_2004_A Model for the Thermo-Acoustic Response of a Premixed Swirl Burner.pdf:application/pdf}, } @article{SteinMeind17, title = {Modeling the {Generation} of {Temperature} {Inhomogeneities} by a {Premixed} {Flame}}, volume = {10}, url = {http://journals.sagepub.com/doi/10.1177/1756827717738139}, doi = {10.1177/1756827717738139}, number = {2}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Steinbacher, Thomas and Meindl, Max and Polifke, Wolfgang}, year = {2018}, keywords = {MediaTUM*, published}, pages = {111--130}, file = {Steinbacher et al_2018_Modeling the Generation of Temperature.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XC7QHGCW\\Steinbacher et al_2018_Modeling the Generation of Temperature.pdf:application/pdf}, } @article{HuberPolif09a, title = {Dynamics of {Practical} {Premix} {Flames}, {Part} {II}: {Identification} and {Interpretation} of {CFD} {Data}}, volume = {1}, issn = {1756-8277, 1756-8285}, doi = {10.1260/175682709788707440}, language = {en}, number = {2}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Huber, Andreas and Polifke, Wolfgang}, month = jun, year = {2009}, keywords = {MediaTUM}, pages = {229--249}, file = {Huber and Polifke - 2009 - Dynamics of Practical Premix Flames, Part II Iden.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IDQS9V2E\\Huber and Polifke - 2009 - Dynamics of Practical Premix Flames, Part II Iden.pdf:application/pdf}, } @article{BlumeSubra13, title = {Novel {Perspectives} on the {Dynamics} of {Premixed} {Flames}}, volume = {160}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0010218013000473}, doi = {10.1016/j.combustflame.2013.02.005}, number = {7}, journal = {Combustion and Flame}, author = {Blumenthal, Ralf S. and Subramanian, Priya and Sujith, R.I. and Polifke, Wolfgang}, month = mar, year = {2013}, keywords = {Combustion, G-equation, Turbulence, Premixed flame, Flame transfer function, impulse response, Rev'd, cutoff behavior, excess, frequency response function}, pages = {1215--1224}, file = {Blumenthal et al. - 2013 - Novel Perspectives on the Dynamics of Premixed Fla.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TG8E36BR\\Blumenthal et al. - 2013 - Novel Perspectives on the Dynamics of Premixed Fla.pdf:application/pdf}, } @phdthesis{Huber09, address = {Munich, Germany}, type = {{PhD} {Thesis}}, title = {Impact of fuel supply impedance and fuel staging on gas turbine combustion stability}, url = {http://www.td.mw.tum.de/tum-td/de/forschung/dissertationen}, school = {TU Munich}, author = {Huber, Andreas}, year = {2009}, file = {Huber_2009_Impact of fuel supply impedance and fuel staging on gas turbine combustion.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z85P2JJG\\Huber_2009_Impact of fuel supply impedance and fuel staging on gas turbine combustion.pdf:application/pdf}, } @article{MerkGaudr18, title = {Measurement and {Simulation} of {Combustion} {Noise} and {Dynamics} of a {Confined} {Swirl} {Flame}}, volume = {56}, issn = {0001-1452, 1533-385X}, url = {https://arc.aiaa.org/doi/10.2514/1.J056502}, doi = {10.2514/1.J056502}, language = {en}, number = {5}, urldate = {2018-01-30}, journal = {AIAA Journal}, author = {Merk, Malte and Gaudron, Renaud and Gatti, Marco and Mirat, Clément and Schuller, Thierry and Polifke, Wolfgang}, month = jan, year = {2018}, keywords = {MediaTUM*}, pages = {1930--1942}, file = {Merk et al. - 2018 - Measurement and Simulation of Combustion Noise and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R9CUMN88\\Merk et al. - 2018 - Measurement and Simulation of Combustion Noise and.pdf:application/pdf}, } @inproceedings{RouweHerma16c, address = {Berlin}, title = {Precursor for thermoacoustic stability in annular combustion systems, based on output-only system identification}, booktitle = {{EVI}-{GTI}}, author = {Rouwenhorst, Driek and Hermann, Jakob}, year = {2016}, file = {Rouwenhorst_Hermann_2016_Precursor for thermoacoustic stability in annular combustion systems, based on.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J35JUAII\\Rouwenhorst_Hermann_2016_Precursor for thermoacoustic stability in annular combustion systems, based on.pdf:application/pdf}, } @inproceedings{JaensEmmer14, address = {Düsseldorf, Germany}, title = {A {Grey}-box {Identification} {Approach} for {Thermoacoustic} {Network} {Models}}, doi = {10.1115/GT2014-27034}, booktitle = {Proceedings of {ASME} {Turbo} {Expo}}, publisher = {GT2014-27034}, author = {Jaensch, S. and Emmert, T. and Silva, C. F. and Polifke, W.}, year = {2014}, keywords = {PerRevJ}, file = {Jaensch et al_2014_A Grey-box Identification Approach for Thermoacoustic Network Models.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GR37UJ6U\\Jaensch et al_2014_A Grey-box Identification Approach for Thermoacoustic Network Models.pdf:application/pdf}, } @article{HuberPolif09, series = {2}, title = {Dynamics of {Practical} {Premix} {Flames}, {Part} {I}: {Model} {Structure} and {Identification}}, volume = {1}, doi = {10.1260/175682709788707431}, number = {2}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Huber, Andreas and Polifke, Wolfgang}, year = {2009}, pages = {199--228}, file = {Huber and Polifke - 2009 - Dynamics of Practical Premix Flames, Part I Model.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H7I2ETTT\\Huber and Polifke - 2009 - Dynamics of Practical Premix Flames, Part I Model.pdf:application/pdf}, } @article{SelimFolle12, series = {0}, title = {Nonlinear {Identification} of the {Unsteady} {Heat} {Transfer} of a {Cylinder} in {Pulsating} {Crossflow}}, volume = {53}, url = {http://www.sciencedirect.com/science/article/pii/S0045793011002556}, doi = {10.1016/j.compfluid.2011.08.012}, journal = {Computers and Fluids}, author = {Selimefendigil, F. and Föller, S. and Polifke, W.}, year = {2012}, pages = {1--14}, file = {Selimefendigil et al_2012_Nonlinear Identification of the Unsteady Heat Transfer of a Cylinder in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S456G9V5\\Selimefendigil et al_2012_Nonlinear Identification of the Unsteady Heat Transfer of a Cylinder in.pdf:application/pdf}, } @article{PolifPasch01, title = {Constructive and {Destructive} {Interference} of {Acoustic} and {Entropy} {Waves} in a {Premixed} {Combustor} with a {Choked} {Exit}}, volume = {6}, doi = {10.20855/IJAV.2001.6.382}, language = {en}, number = {3}, journal = {International Journal of Acoustics and Vibration}, author = {Polifke, W. and Paschereit, C. O. and Döbbeling, K.}, year = {2001}, keywords = {Combustion, Thermoacoustics, Pulsation, Frequency response, Rev'd, Entropy wave}, pages = {135--146}, file = {Polifke et al_2001_Constructive and Destructive Interference of Acoustic and Entropy Waves in a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CNAXRXD2\\Polifke et al_2001_Constructive and Destructive Interference of Acoustic and Entropy Waves in a.pdf:application/pdf}, } @inproceedings{SovarJaens13, address = {Garching, Germany}, title = {Parametric vs. {Nonparametric} {Identification} of {Nonlinear} {Acoustic} {Scattering} at {Duct} {Discontinuities} {Based} on {LES} {Data}}, url = {http://www.sfbtr40.de/fileadmin/Summer_Programs/Summer_Program_2013/13-SP2013.pdf}, booktitle = {Proceedings of the {Summer} {School} {Program} {SFB} {TRR40}}, author = {Sovardi, C. and Jaensch, S. and Förner, K. and Selimefendigil, F. and Polifke, W.}, year = {2013}, keywords = {MediaTUM, NonPerRev}, file = {Sovardi et al_2013_Parametric vs.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EGJ5BZXK\\Sovardi et al_2013_Parametric vs.pdf:application/pdf}, } @article{FornePolif17, title = {Nonlinear {Aeroacoustic} {Identification} of {Helmholtz} {Resonators} {Based} on a {Local}-{Linear} {Neuro}-{Fuzzy} {Network} {Model}}, volume = {407}, doi = {10.1016/j.jsv.2017.07.002}, journal = {J. Sound Vibration}, author = {Förner, Kilian and Polifke, Wolfgang}, year = {2017}, keywords = {MediaTUM}, pages = {170--190}, annote = {RoMEO green journal - can archive pre- and postprint. Put AAM on RG in Nov. 17}, file = {Förner and Polifke - 2017 - Nonlinear Aeroacoustic Identification of Helmholtz.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5FIAQH3N\\Förner and Polifke - 2017 - Nonlinear Aeroacoustic Identification of Helmholtz.pdf:application/pdf}, } @article{JaensSovar16, title = {On the {Robust}, {Flexible} and {Consistent} {Implementation} of {Time} {Domain} {Impedance} {Boundary} {Conditions} for {Compressible} {Flow} {Simulations}}, volume = {314}, issn = {00219991}, doi = {10.1016/j.jcp.2016.03.010}, language = {en}, journal = {Journal of Computational Physics}, author = {Jaensch, S. and Sovardi, C. and Polifke, W.}, month = jun, year = {2016}, keywords = {Acoustics, State-space, Boundary condition, Reflection coefficient, NSCBC, Impedance}, pages = {145--159}, annote = {CBSBC }, file = {Jaensch et al_2016_On the robust, flexible and consistent implementation of time domain impedance.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JPZTUMNW\\Jaensch et al_2016_On the robust, flexible and consistent implementation of time domain impedance.pdf:application/pdf;ScienceDirect Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\WU8V3I5A\\S0021999116001625.html:text/html}, } @article{PolifWall06, title = {Partially reflecting and non-reflecting boundary conditions for simulation of compressible viscous flow}, volume = {213}, doi = {doi:10.1016/j.jcp.2005.08.016}, number = {1}, journal = {Journal of Computational Physics}, author = {Polifke, Wolfgang and Wall, C. and Moin, P.}, month = mar, year = {2006}, keywords = {Acoustics, Turbulence, CFD}, pages = {437--449}, file = {Polifke et al_2006_Partially reflecting and non-reflecting boundary conditions for simulation of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DHUUSQKF\\Polifke et al_2006_Partially reflecting and non-reflecting boundary conditions for simulation of.pdf:application/pdf}, } @phdthesis{Emmer16, address = {München, Germany}, type = {Ph.{D}. {Thesis}}, title = {State {Space} {Modeling} of {Thermoacoustic} {Systems} with {Application} to {Intrinsic} {Feedback}}, school = {TU München}, author = {Emmert, Thomas}, year = {2016}, file = {Emmert - 2016 - State Space Modeling of Thermoacoustic Systems wit.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S6JXCCHW\\Emmert - 2016 - State Space Modeling of Thermoacoustic Systems wit.pdf:application/pdf}, } @misc{witte_system_2019, title = {System {Identification}}, url = {https://wiki.tum.de/display/tfd/System+Identification}, author = {Witte, Armin}, year = {2019}, file = {Witte_2019_System Identification.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5IJ3Y3LI\\Witte_2019_System Identification.pdf:application/pdf}, } @article{FollePolif12, title = {Identification of {Aero}-{Acoustic} {Scattering} {Matrices} from {Large} {Eddy} {Simulation}: {Application} to a {Sudden} {Area} {Expansion} of a {Duct}}, volume = {331}, issn = {8928916216}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0022460X12000247}, doi = {10.1016/j.jsv.2012.01.004}, number = {13}, journal = {Journal of Sound and Vibration}, author = {Föller, S. and Polifke, W.}, month = jun, year = {2012}, pages = {3096--3113}, file = {Föller and Polifke - 2012 - Identification of aero-acoustic scattering matrice.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GPUBWEK4\\Föller and Polifke - 2012 - Identification of aero-acoustic scattering matrice.pdf:application/pdf}, } @article{SilvaEmmer15, title = {Numerical {Study} on {Intrinsic} {Thermoacoustic} {Instability} of a {Laminar} {Premixed} {Flame}}, volume = {162}, issn = {00102180}, doi = {10.1016/j.combustflame.2015.06.003}, language = {en}, number = {9}, journal = {Combustion and Flame}, author = {Silva, Camilo F. and Emmert, Thomas and Jaensch, Stefan and Polifke, Wolfgang}, month = sep, year = {2015}, keywords = {Intrinsic thermoacoustic feedback, Thermoacoustics, PerRev, feedback}, pages = {3370 -- 3378}, annote = {The following fields were not imported:keywords=Finite Impulse Response (FIR)keywords=Flame Transfer Function (FTF)keywords=Combustion instability}, file = {Silva et al_2015_Numerical study on intrinsic thermoacoustic instability of a laminar premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\U5QM74I3\\Silva et al_2015_Numerical study on intrinsic thermoacoustic instability of a laminar premixed.pdf:application/pdf}, } @inproceedings{SilvaMerk16, address = {Garching, Germany}, title = {The {Contribution} of {Intrinsic} {Thermoacoustic} {Feedback} to {Combustion} {Noise} and {Resonances} of a {Confined} {Turbulent} {Premixed} {Flame}}, booktitle = {International {Symposium}: {Thermoacoustic} instabilities in {Gas} {Turbines} and {Rocket} engines}, author = {Silva, C. F. and Merk, Malte and Komarek, T. and Polifke, W.}, month = may, year = {2016}, keywords = {MediaTUM}, file = {Silva et al_2016_The Contribution of Intrinsic Thermoacoustic Feedback to Combustion Noise and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KVTDHBDH\\Silva et al_2016_The Contribution of Intrinsic Thermoacoustic Feedback to Combustion Noise and.pdf:application/pdf}, } @article{CaeirSovar17, title = {Shape {Optimization} of a {Helmholtz} {Resonator} using an {Adjoint} {Method}}, volume = {9}, doi = {10.1177/1756827717703576}, number = {4}, journal = {Int. J. Spray Combust. Dyn.}, author = {Caeiro, F. and Sovardi, C. and Förner, K. and Polifke, W.}, year = {2017}, keywords = {MediaTUM}, pages = {394--408}, file = {Caeiro et al_2017_Shape Optimization of a Helmholtz.pdf:C\:\\Users\\niebl\\Zotero\\storage\\US5PZ5ME\\Caeiro et al_2017_Shape Optimization of a Helmholtz.pdf:application/pdf}, } @inproceedings{AlbayPolif16, address = {Athens, Greece}, title = {Propagation {Velocity} of {Inertial} {Waves} in {Cylindrical} {Swirling} {Flow}}, booktitle = {23nd {Int}. {Congress} on {Sound} and {Vibration} ({ICSV23})}, publisher = {IIAV}, author = {Albayrak, Alp and Polifke, Wolfgang}, year = {2016}, keywords = {MediaTUM}, file = {Albayrak and Polifke - 2016 - Propagation Velocity of Inertial Waves in Cylindri.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2K5JAE4B\\Albayrak and Polifke - 2016 - Propagation Velocity of Inertial Waves in Cylindri.pdf:application/pdf}, } @phdthesis{Meind14, type = {Semester {Thesis}}, title = {Parameterstudie zur {Identifizierbarkeit} thermoakustischer {Netzwerkmodelle}}, language = {German}, school = {TU München}, author = {Meindl, Max}, month = oct, year = {2014}, file = {Meindl 2014 Parameterstudie zur Identifizierbarkeit thermoakustischer Netzwerkmodelle.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TAVTNNNM\\Meindl 2014 Parameterstudie zur Identifizierbarkeit thermoakustischer Netzwerkmodelle.pdf:application/pdf}, } @inproceedings{TraceDurai13, title = {Application of {Supervised} {Learning} to {Quantify} {Uncertainties} in {Turbulence} and {Combustion} {Modeling}}, isbn = {978-1-62410-181-6}, url = {http://arc.aiaa.org/doi/10.2514/6.2013-259}, doi = {10.2514/6.2013-259}, language = {en}, urldate = {2017-11-07}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Tracey, Brendan and Duraisamy, Karthik and Alonso, Juan}, month = jan, year = {2013}, keywords = {machine learning}, file = {Tracey et al_2013_Application of Supervised Learning to Quantify Uncertainties in Turbulence and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RR8Q5C3Q\\Tracey et al_2013_Application of Supervised Learning to Quantify Uncertainties in Turbulence and.pdf:application/pdf}, } @inproceedings{MerkGaudr17, address = {Atlanta, GA, USA}, title = {Quantitative {Comparisons} {Between} {LES} {Predictions} and {Experimental} {Measurements} of {Sound} {Pressure} {Spectra} in a {Confined} {Swirl} {Combustor}}, isbn = {978-1-62410-511-1}, url = {https://arc.aiaa.org/doi/10.2514/6.2017-4687}, doi = {10.2514/6.2017-4687}, language = {en}, urldate = {2017-08-10}, booktitle = {53rd {AIAA}/{SAE}/{ASEE} {Joint} {Propulsion} {Conference}, {AIAA} {Propulsion} and {Energy} {Forum}}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Merk, Malte and Gaudron, Renaud and Gatti, Marco and Mirat, Clément and Polifke, Wolfgang and Schuller, Thierry}, month = jul, year = {2017}, keywords = {MediaTUM}, file = {Merk et al. - 2017 - Quantitative Comparisons Between LES Predictions a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WMCCNGN7\\Merk et al. - 2017 - Quantitative Comparisons Between LES Predictions a.pdf:application/pdf}, } @inproceedings{AvdonJavar19, address = {Phoenix, USA}, series = {{GT2019}-90140}, title = {Prediction of premixed flame dynamics using {LES} with tabulated chemistry and {Eulerian} stochastic fields}, booktitle = {{ASME} {Turbo} {Expo} 2019: {Turbomachinery} {Technical} {Conference} and {Exposition}}, author = {Avdonin, A. and Javareshkian, A. and Polifke, W.}, year = {2019}, keywords = {MediaTUM}, file = {Avdonin et al. - 2019 - Identification of premixed turbulent flame dynamic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\53LF9YJ4\\Avdonin et al. - 2019 - Identification of premixed turbulent flame dynamic.pdf:application/pdf}, } @article{PaschSchue02, title = {Measurement of {Transfer} {Matrices} and {Source} {Terms} of {Premixed} {Flames}}, volume = {124}, url = {http://gasturbinespower.asmedigitalcollection.asme.org/article.aspx?articleid=1421328}, doi = {10.1115/1.1383255}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Paschereit, Christian O. and Schuermans, Bruno and Polifke, Wolfgang and Mattson, Oscar}, year = {2002}, keywords = {Combustion, Thermoacoustics, Acoustics, Premixed flame, gas turbines, Rev'd, Flames, oscillations}, pages = {239--247}, file = {Paschereit et al. - 2002 - Measurement of Transfer Matrices and Source Terms .pdf:C\:\\Users\\niebl\\Zotero\\storage\\FFIB2GTE\\Paschereit et al. - 2002 - Measurement of Transfer Matrices and Source Terms .pdf:application/pdf}, } @article{PolifLawn07, series = {3}, title = {On the {Low}-{Frequency} {Limit} of {Flame} {Transfer} {Functions}}, volume = {151}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0010218007001952}, doi = {10.1016/j.combustflame.2007.07.005}, number = {3}, journal = {Combustion and Flame}, author = {Polifke, Wolfgang and Lawn, Chris J}, month = nov, year = {2007}, keywords = {Combustion, Thermo-acoustics, Combustion dynamics, Premixed flame, Flame frequency response, Frequency response, low-frequency limit}, pages = {437--451}, file = {Polifke_Lawn_2007_On the low-frequency limit of flame transfer functions.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3PQU7XDT\\Polifke_Lawn_2007_On the low-frequency limit of flame transfer functions.pdf:application/pdf}, } @article{GuoSilva18b, series = {{GTP}-18-1585}, title = {Quantification and {Propagation} of {Uncertainties} in {Identification} of {Flame} {Impulse} {Response} for {Thermoacoustic} {Stability} {Analysis}}, volume = {141}, issn = {0742-4795}, url = {http://dx.doi.org/10.1115/1.4041652}, doi = {10.1115/1.4041652}, abstract = {The thermoacoustic behavior of a combustion system can be determined numerically via acoustic tools such as Helmholtz solvers or network models coupled with a model for the flame dynamic response. Within such a framework, the flame response to flow perturbations can be described by a finite impulse response (FIR) model, which can be derived from large eddy simulation (LES) time series via system identification. However, the estimated FIR model will inevitably contain uncertainties due to, e.g., the statistical nature of the identification process, low signal-to-noise ratio, or finite length of time series. Thus, a necessary step toward reliable thermoacoustic stability analysis is to quantify the impact of uncertainties in FIR model on the growth rate of thermoacoustic modes. There are two practical considerations involved in this topic. First, how to efficiently propagate uncertainties from the FIR model to the modal growth rate of the system, considering it is a high dimensional uncertainty quantification (UQ) problem? Second, since longer computational fluid dynamics (CFD) simulation time generally leads to less uncertain FIR model identification, how to determine the length of the CFD simulation required to obtain satisfactory confidence? To address the two issues, a dimensional reduction UQ methodology called “Active subspace approach (ASA)” is employed in the present study. For the first question, ASA is applied to exploit a low-dimensional approximation of the original system, which allows accelerated UQ analysis. Good agreement with Monte Carlo analysis demonstrates the accuracy of the method. For the second question, a procedure based on ASA is proposed, which can serve as an indicator for terminating CFD simulation. The effectiveness of the procedure is verified in the paper.}, number = {2}, urldate = {2018-10-27}, journal = {J. Eng. Gas Turbines and Power}, author = {Guo, Shuai and Silva, Camilo F. and Ghani, Abdulla and Polifke, Wolfgang}, month = feb, year = {2019}, keywords = {MediaTUM*, archived}, pages = {021032--10}, file = {Guo et al_2019_Quantification and Propagation of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\LB2XW47M\\Guo et al_2019_Quantification and Propagation of.pdf:application/pdf}, } @article{ForneCarde15, title = {Mapping the {Influence} of {Acoustic} {Resonators} on {Rocket} {Engine} {Combustion} {Stability}}, volume = {31}, issn = {0748-4658}, doi = {10.2514/1.B35660}, number = {4}, urldate = {2015-10-06}, journal = {Journal of Propulsion and Power}, author = {Förner, K. and Cárdenas Miranda, A. and Polifke, W.}, month = apr, year = {2015}, keywords = {MediaTUM}, pages = {1159--1166}, file = {Förner, Kilian et al. - 2015 - Mapping the Influence of Acoustic Resonators on Ro.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WMW7DH6E\\Förner, Kilian et al. - 2015 - Mapping the Influence of Acoustic Resonators on Ro.pdf:application/pdf}, } @book{PoinsVeyna05, address = {Philadelphia, PA, USA}, edition = {2nd ed.}, title = {Theoretical and numerical combustion}, url = {https://books.google.com/books?hl=fr&lr=&id=cqFDkeVABYoC&oi=fnd&pg=PR11&dq=theoretical+and+numerical+combustion&ots=LdtYJPP_ew&sig=ImXTPUyCnkIWGfagXe37RNR0ivM}, urldate = {2017-06-22}, publisher = {Edwards}, author = {Poinsot, Thierry and Veynante, Denis}, year = {2005}, note = {tex.ids= PoinsVeyna12a}, keywords = {Combustion, Thermo-acoustics, Numerical Methods, Mathematical models, CFD, Simulation + Modelling}, file = {Poinsot and Veynante - 2005 - Theoretical and numerical combustion.pdf:C\:\\Users\\niebl\\Zotero\\storage\\U6J8NUCQ\\Poinsot and Veynante - 2005 - Theoretical and numerical combustion.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\5A6VJ9HA\\books.html:text/html}, } @article{RouweHerma18a, title = {In situ identification strategy of thermoacoustic stability in annular combustors}, volume = {10}, issn = {1756-8277, 1756-8285}, url = {http://journals.sagepub.com/doi/10.1177/1756827718799043}, doi = {10.1177/1756827718799043}, language = {en}, number = {4}, urldate = {2019-01-15}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Rouwenhorst, Driek and Hermann, Jakob and Polifke, Wolfgang}, month = dec, year = {2018}, note = {tex.ids: RouweHerma18}, keywords = {MediaTUM*, published}, pages = {351--361}, file = {Rouwenhorst et al. - 2018 - In situ identification strategy of thermoacoustic .pdf:C\:\\Users\\niebl\\Zotero\\storage\\FL6Y5I6Z\\Rouwenhorst et al. - 2018 - In situ identification strategy of thermoacoustic .pdf:application/pdf}, } @inproceedings{GentePolif07, address = {Montreal, Canada}, title = {Scattering and generation of acoustic energy by a premix swirl burner}, isbn = {978-0-7918-4791-6}, doi = {10.1115/GT2007-27238}, language = {en}, booktitle = {Volume 2: {Turbo} {Expo} 2007}, publisher = {ASMEDC}, author = {Gentemann, A. and Polifke, W.}, month = jan, year = {2007}, keywords = {Stability, Thermoacoustics, MediaTUM, Low order model, Premixed flame, Frequency response}, pages = {125--133}, file = {Gentemann_Polifke_2007_Scattering and generation of acoustic energy by a premix swirl burner.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3UJXEIQ5\\Gentemann_Polifke_2007_Scattering and generation of acoustic energy by a premix swirl burner.pdf:application/pdf}, } @inproceedings{GuoSilva18, address = {Lillestrøm (Oslo), Norway}, series = {{GT2018}-75644}, title = {Quantification and {Propagation} of {Uncertainties} in {Identification} of {Flame} {Impulse} {Response} for {Thermoacoustic} {Stability} {Analysis}}, booktitle = {{ASME} {Turbo} {Expo} 2018: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Guo, Shuai and Silva, Camilo F and Abdulla, Ghani and Polifke, Wolfgang}, month = jun, year = {2018}, keywords = {MediaTUM, Archived}, file = {Guo et al. - 2018 - Quantification and Propagation of Uncertainties in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2HS8Z66H\\Guo et al. - 2018 - Quantification and Propagation of Uncertainties in.pdf:application/pdf}, } @article{KarbaSchra18, title = {Prediction of ducted diaphragm noise using a stochastic approach with adapted temporal filters}, volume = {18}, url = {https://journals.sagepub.com/eprint/https://journals.sagepub.com/eprint/IwB46VSDvQZs3dIfd6je/fullIwB46VSDvQZs3dIfd6je/full}, doi = {10.1177/1475472X18812811}, number = {1}, journal = {Int. J. Aeroacoustics}, author = {Karban, Ugur and Schram, Christophe and Sovardi, Carlo and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM*}, pages = {49--72}, file = {Karban et al_2018_Prediction of ducted diaphragm noise.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9IDKGAB8\\Karban et al_2018_Prediction of ducted diaphragm noise.pdf:application/pdf}, } @article{HaeriPolif19a, series = {{GTP}-19-1512}, title = {Time {Domain} {Bloch} {Boundary} {Conditions} for {Efficient} {Simulation} of {Thermoacoustic} {Limit}-{Cycles} in ({Can}-){Annular} {Combustors}}, volume = {141}, doi = {10.1115/1.4044869}, number = {12}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Haeringer, Matthias and Polifke, Wolfgang}, year = {2019}, keywords = {archived, MediaTUM}, pages = {121005}, file = {Haeringer_Polifke_2019_Time Domain Bloch Boundary Conditions.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KXRPFYS5\\Haeringer_Polifke_2019_Time Domain Bloch Boundary Conditions.pdf:application/pdf}, } @inproceedings{ghani_daten-getriebene_2019, address = {Bochum}, title = {Daten-getriebene {Optimierung} eines nichtlinearen {Modells} zur {Analyse} und {Kontrolle} von {Verbrennungsinstabilitäten}}, author = {Ghani, Abdulla and Boxx, Isaac and Noren, Carrie and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM}, } @incollection{BurenPolif19b, title = {Enhanced {Longitudinal} {Heat} {Transfer} in {Turbulent} {Oscillatory} {Channel} {Flow}}, booktitle = {Annual {Report}}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Buren, S. van and Polifke, W.}, editor = {Stemmer, C. and Adams, N. A. and Haidn, O. J. and Radespiel, R. and Sattelmayer, T and Schröder, W. and Weigand, B.}, month = nov, year = {2019}, keywords = {published, MediaTUM}, pages = {35--48}, file = {Buren and Polifke - 2019 - Enhanced Longitudinal Heat Transfer in Turbulent O.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F69RIC2T\\Buren and Polifke - 2019 - Enhanced Longitudinal Heat Transfer in Turbulent O.pdf:application/pdf}, } @article{BurenCarde19, title = {Large {Eddy} {Simulation} of {Enhanced} {Heat} {Transfer} in {Pulsatile} {Turbulent} {Channel} {Flow}}, volume = {144}, doi = {10.1016/j.ijheatmasstransfer.2019.118585}, journal = {Int. J. of Heat and Mass Transfer}, author = {Buren, S. van and Cárdenas Miranda, Alejandro and Polifke, W.}, editor = {Adams, N. A. and Haidn, O. J. and Radespiel, R. and Sattelmayer, T and Schröder, W. and Weigand, B.}, month = dec, year = {2019}, keywords = {archived, MediaTUM}, pages = {118585}, file = {Buren et al. - 2019 - Large Eddy Simulation of Enhanced Heat Transfer in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\396P24UA\\Buren et al. - 2019 - Large Eddy Simulation of Enhanced Heat Transfer in.pdf:application/pdf}, } @inproceedings{SteinStrob16, address = {Menaggio, Italy}, title = {Modeling the {Generation} of {Entropy} {Waves} by a {Premixed} {Flame}}, booktitle = {{CDCN2} - 2nd {Colloquium} on {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Steinbacher, Thomas and Strobio Chen, Lin and Polifke, Wolfgang}, year = {2016}, keywords = {published}, file = {Steinbacher - 2016 - MODELING THE GENERATION OF ENTROPY WAVES BY A PREM.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K9NJ48B4\\Steinbacher - 2016 - MODELING THE GENERATION OF ENTROPY WAVES BY A PREM.pdf:application/pdf}, } @inproceedings{SilvaRunte16, address = {Seoul, Korea}, series = {{GT2016}-57659}, title = {Uncertainty quantification of growth rates of thermoacoustic instability by an adjoint {Helmholtz} solver}, doi = {10.1115/GT2016-57659}, booktitle = {{ASME}/{IGTI} {Turbo} {Expo} 2016}, publisher = {ASME}, author = {Silva, C.F. and Runte, T. and Polifke, W. and Magri, L.}, year = {2016}, keywords = {published}, file = {Silva et al_2016_Uncertainty quantification of growth rates of thermoacoustic instability by an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DX8FI6IA\\Silva et al_2016_Uncertainty quantification of growth rates of thermoacoustic instability by an.pdf:application/pdf}, } @inproceedings{RouweHerma16a, address = {Garching, Germany}, series = {{GTRE}-010}, title = {Bifurcation study of azimuthal bulk flow in annular combustion systems with cylindrical symmetry breaking}, booktitle = {Thermoacoustic {Instabilities} in {Gas} {Turbines} and {Rocket} {Engines}}, author = {Rouwenhorst, Driek and Hermann, Jakob and Polifke, Wolfgang}, month = jun, year = {2016}, keywords = {published}, file = {Rouwenhorst et al_2016_Bifurcation study of azimuthal bulk flow in annular combustion systems with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W56DKCP8\\Rouwenhorst et al_2016_Bifurcation study of azimuthal bulk flow in annular combustion systems with.pdf:application/pdf}, } @inproceedings{Polif16b, address = {Menaggio, Italy}, title = {Consequences of {Intrinsic} {Thermoacoustic} {Feedback} for {Combustion} {Dynamics} and {Combustion} {Noise}}, url = {https://www.researchgate.net/publication/308475583_Consequences_of_intrinsic_thermoacoustic_feedback_for_combustion_dynamics_and_combustion_noise}, doi = {10.13140/RG.2.2.20329.29289}, booktitle = {{CDCN2} - 2nd {Colloquium} on {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Polifke, Wolfgang}, year = {2016}, } @inproceedings{MeindEmmer16, address = {Athens, Greece}, title = {Efficient calculation of thermoacoustic modes utilizing state-space models}, booktitle = {23nd {Int}. {Congress} on {Sound} and {Vibration} ({ICSV23})}, author = {Meindl, Max and Emmert, Thomas and Polifke, Wolfgang}, year = {2016}, keywords = {published}, file = {Meindl et al. - 2016 - Efficient calculation of thermoacoustic modes util.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GNIJHXRF\\Meindl et al. - 2016 - Efficient calculation of thermoacoustic modes util.pdf:application/pdf}, } @inproceedings{AcherLenz13, title = {Die {Momentenmethode} für die {Simulation} turbulenter {Gas}-{Flüssigströmungen} im {Euler}-{Euler}-{Kontext}}, booktitle = {Jahrestreffen der {ProcessNet}}, author = {Acher, T. and Lenz, S. and Gobert, C. and Dems, P. and Polifke, W.}, year = {2013}, } @inproceedings{JaensEmmer14a, address = {Copenhagen, Denmark}, title = {Identification of {Flame} {Transfer} {Functions} in the {Presence} of {Intrinsic} {Feedback} and {Noise}}, abstract = {The flame transfer function (FTF) in combination with a thermo acoustic network model has been proven to be a useful tool for the prediction of thermo acoustic instabilities. It relates a velocity fluctuation upstream of the flame to the resulting fluctuation of the heat release rate. The FTF can be derived from a large eddy simulation (LES) of the particular flame. Here, the most efficient method is the so called LES/SI approach. Thereby, the LES is excited with a broadband velocity fluctuation and the resulting fluctuation of the heat release rate is measured. The generated time series are then post processed with system identification (SI) techniques in order to determine the FTF. The system identification method that is commonly used within the LES/SI approach is the Wiener-Hopf inversion. It is based on correlation analysis and works well in configurations without feedback. This requires that the LES have boundary conditions with low acoustic reflection factor, which can be achieved by plane wave masking. However, non-reflecting boundary conditions are not sufficient to avoid feedback in an identification experiment: Recent research has shown that in compressible flow, velocity sensitive flames are unavoidably part of an intrinsic feedback loopb. This feedback loop, shown in the figure below, can be explained as follows. A fluctuation of the velocity ⬚⬚′ results in a fluctuation of the heat release rate ⬚⬚̇ ′. The latter creates an acoustic waves ⬚⬚ at the flame position, which is traveling upstream. This wave induces again a fluctuation of the velocity at the reference position and hence, the FTF is, in a compressible simulation, always under feedback. We investigate the consequences of this effect on the LES/SI approach. Our study is based on data generated by simulating a low-order thermo acoustic network model in the time domain. We can show that the Wiener-Hopf inversion works well under feedback as long as no turbulent combustion noise is considered. If turbulent disturbances are considered the Wiener-Hopf inversions converges to wrong values. The resulting bias depends on the signal to noise ratio, which means that for high amplitudes of the input signal the influence of the combustion noise can be neglected and the Wiener-Hopf inversion properly estimates the FTF. However, in real configurations high amplitudes of the input signals result in a nonlinear response of the system. Therefore, we propose to use an advanced system identification approach based on the prediction error method (PEM). With this method it is possible to determine the FTF under closed loop conditions and a low signal to noise ratio. Furthermore, the method identifies a model for the combustion noise.}, booktitle = {{EFMC10} – 10th {European} {Fluid} {Mechanics} {Conference}}, author = {Jaensch, S. and Emmert, T. and Polifke, W.}, year = {2014}, keywords = {published, MediaTUM}, file = {Jaensch et al_2014_Identification of Flame Transfer Functions in the Presence of Intrinsic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6TGE9HRA\\Jaensch et al_2014_Identification of Flame Transfer Functions in the Presence of Intrinsic.pdf:application/pdf}, } @incollection{Polif10, address = {Rhode-St-Genèse, BE}, series = {{VKI} {Lecture} {Series}}, title = {Low-{Order} {Analysis} {Tools} for {Aero}- and {Thermo}-{Acoustic} {Instabilities}}, isbn = {978-2-87516-012-6}, number = {VKI LS 2011-01}, booktitle = {Advances in {Aero}-{Acoustics} and {Thermo}-{Acoustics}}, publisher = {Van Karman Institute for Fluid Dynamics}, author = {Polifke, W.}, editor = {Schram, C.}, year = {2010}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, file = {annoted Emmert Polifke_2010_Low-Order Analysis Tools for Aero- and Thermo-Acoustic Instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UMJWKTFM\\annoted Emmert Polifke_2010_Low-Order Analysis Tools for Aero- and Thermo-Acoustic Instabilities.pdf:application/pdf;Polifke_2010_Low-Order Analysis Tools for Aero- and Thermo-Acoustic Instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8EQPB5H9\\Polifke_2010_Low-Order Analysis Tools for Aero- and Thermo-Acoustic Instabilities.pdf:application/pdf}, } @techreport{fournier_d12_2020, type = {Report}, title = {D1.2 - {TDIBC} routines delivered to {CERFACS} for integration in {AVBP}}, abstract = {ITN ANNULIGhT - Deliverable 1.2}, number = {D1.2}, author = {Fournier, Guillaume J. J. and Polifke, Wolfgang and Lo Schiavo, Ermanno and Gicquel, Laurent and Poinsot, Thierry}, month = apr, year = {2020}, pages = {15}, file = {Fournier et al_2020_D1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CH944LGQ\\Fournier et al_2020_D1.pdf:application/pdf}, } @inproceedings{StrobStein16, address = {Seoul, Korea}, title = {On {Generation} of {Entropy} {Waves} {Across} a {Premixed} {Flame}}, volume = {Volume 4A: Combustion, Fuels and Emissions}, isbn = {978-0-7918-4975-0}, doi = {10.1115/GT2016-57026}, booktitle = {{ASME} 2016 {Turbo} {Expo}: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Strobio Chen, Lin and Steinbacher, Thomas and Silva, Camilo and Polifke, Wolfgang}, year = {2016}, keywords = {published, tango}, pages = {V04AT04A049}, file = {Strobio Chen et al_2016_On Entropy Waves Production Across a Premixed Flame.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SG96DMD4\\Strobio Chen et al_2016_On Entropy Waves Production Across a Premixed Flame.pdf:application/pdf}, } @techreport{garcia-vergara_deliverable_2020, title = {Deliverable 2.2 - {ITN} {POLKA} - {Review} on {Flashback}}, author = {Garcia-Vergara, Alex}, year = {2020}, file = {Garcia-Vergara_2020_Deliverable 2.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B9FDZ6VB\\Garcia-Vergara_2020_Deliverable 2.pdf:application/pdf}, } @misc{Schil16, title = {Documentation and validation of the {taX} blocks {triJunction}\_12 and {triJunction21} in sparse state space}, author = {Schily, Felix}, year = {2016}, file = {Schily_2016_Documentation and validation of the taX blocks triJunction_12 and triJunction21.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SX6MMUQ2\\Schily_2016_Documentation and validation of the taX blocks triJunction_12 and triJunction21.pdf:application/pdf}, } @inproceedings{PaschPolif97, address = {San Francisco, CA}, title = {Characterization of {Lean} {Premixed} {Gas} {Turbine} {Burners} as {Acoustic} {Multi}-{Ports}}, booktitle = {{APS}/{DFD} {Annual} {Meeting}}, publisher = {APS}, author = {Paschereit, Christian O. and Polifke, Wolfgang}, year = {1997}, note = {tex.ids: PolifPasch97}, keywords = {Thermoacoustics, Simulation + Modelling, Unrev'd}, file = {Paschereit_Polifke_1997_Characterization of Lean Premixed Gas.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WK3XNGJM\\Paschereit_Polifke_1997_Characterization of Lean Premixed Gas.pdf:application/pdf}, } @article{LawnEvesq04, title = {A {Model} for the {Thermo}-{Acoustic} {Response} of a {Premixed} {Swirl} {Burner}: {Part} {I}: {Acoustic} {Aspects}}, volume = {176}, doi = {10.1080/00102200490461605}, number = {8}, journal = {Comb. Sci. Tech.}, author = {Lawn, C J and Evesque, S and Polifke, W}, month = aug, year = {2004}, keywords = {Thermo-acoustics, Low order model, Turbulence, Premixed flame, Convective Waves}, pages = {1331 -- 1358}, file = {Lawn et al_2004_A Model for the Thermo-Acoustic Response of a Premixed Swirl Burner.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XSG2BZBR\\Lawn et al_2004_A Model for the Thermo-Acoustic Response of a Premixed Swirl Burner.pdf:application/pdf}, } @article{SattePolif03, title = {Assessment of {Methods} for the {Computation} of the {Linear} {Stability} of {Combustors}}, volume = {175}, url = {http://www.tandfonline.com/doi/abs/10.1080/00102200302382}, doi = {10.1080/00102200302382}, number = {3}, journal = {Combust. Sci. Tech.}, author = {Sattelmayer, T. and Polifke, W.}, year = {2003}, keywords = {Stability, Thermoacoustics, Low order model, Pulsation, Stability analysis, Simulation + Modelling, Rev'd}, pages = {453--476}, file = {Sattelmayer_Polifke_2003_Assessment of Methods for the Computation of the Linear Stability of Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JWW6FSMK\\Sattelmayer_Polifke_2003_Assessment of Methods for the Computation of the Linear Stability of Combustors.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\7E36TUPB\\cookieAbsent.html:text/html}, } @article{MejiaBrebi18, title = {Influence of flame-holder temperature on the acoustic flame transfer functions of a laminar flame}, volume = {188}, issn = {0010-2180}, url = {http://www.sciencedirect.com/science/article/pii/S0010218017303462}, doi = {10.1016/j.combustflame.2017.09.016}, abstract = {The occurrence of combustion instabilities in high-performance engines such as gas turbines is often affected by the thermal state of the engine. For example, strong bursts of pressure fluctuations may occur at cold start for operating conditions that are stable once the engine reaches thermal equilibrium. This observation raises the question of the influence of material temperature on the response of flames to acoustic perturbations. In this study, we assess the influence of the temperature of the flame holder for a laminar flame. Both experiments and numerical simulations show that the Flame Transfer Function (FTF) is strongly affected by the flame-holder temperature. The key factors driving the evolution of the FTF are the flame-root location as well as the modification of the flow, which affects its stability. In the case of the cooled flame-holder, the formation of a recirculation zone is identified as the main impact on the FTF.}, language = {en}, number = {2}, urldate = {2020-04-07}, journal = {Combustion and Flame}, author = {Mejia, Daniel and Miguel-Brebion, Maxence and Ghani, Abdulla and Kaiser, Thomas and Duchaine, Florent and Selle, Laurent and Poinsot, Thierry}, month = feb, year = {2018}, keywords = {MediaTUM*, published, Premixed flame, Flame transfer function, DNS, Laminar flame, Conjugate heat transfer, Analytically reduced chemistry}, pages = {5--12}, file = {Accepted Version:C\:\\Users\\niebl\\Zotero\\storage\\C4YBCWXF\\Mejia et al. - 2018 - Influence of flame-holder temperature on the acous.pdf:application/pdf;Mejia et al. - 2018 - Influence of Flame-Holder Temperature on the Acous:C\:\\Users\\niebl\\Zotero\\storage\\9HWFC8AJ\\Mejia et al. - 2018 - Influence of Flame-Holder Temperature on the Acous:application/pdf;ScienceDirect Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\QCKUWR4X\\S0010218017303462.html:text/html}, } @patent{JoosPolif02a, title = {Combustion device for generating hot gases}, url = {http://www.google.de/patents/US6449951}, abstract = {In a combustion device (10), particularly for driving gas turbines, comprising a plurality of burners (12, . . . , 15) of identical thermal power output, which work parallel to an axis (28) into a common combustion chamber (11), an effective suppression of thermoacoustic combustion instabilities is achieved in a simple way in that the burners (12, . . . , 15) are designed differently from one another in such a way that the flames (24, . . . , 27) or flame fronts generated by them are positioned so as to be distributed along the axis (28).}, nationality = {United States}, assignee = {Alstom}, number = {US6449951 B1}, urldate = {2016-04-28}, author = {Joos, Franz and Polifke, Wolfgang and Ni, Alexander}, month = sep, year = {2002}, note = {U.S. Classification 60/725, 60/746; International Classification F23R3/30, F23R3/16, F23R3/12, F23R3/28; Cooperative Classification F23R2900/00016, F23R2900/00014, F23D2210/00, F23C2900/07002, F23R3/286; European Classification F23R3/28D}, annote = {use non-uniformity between burners for thermo-acoustic stabilization}, file = {Joos et al_2002_Combustion device for generating hot gases.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3C7TAJXN\\Joos et al_2002_Combustion device for generating hot gases.pdf:application/pdf;Joos et al_2002_Combustion device for generating hot gases.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PS9ASW9W\\Joos et al_2002_Combustion device for generating hot gases.pdf:application/pdf;US6449951.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QM9IM6P6\\viewer.html:text/html;US6449951.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7A28JHBB\\US6449951.pdf:application/pdf}, } @article{jones_efficient_1998, title = {Efficient {Global} {Optimization} of {Expensive} {Black}-{Box} {Functions}}, volume = {13}, issn = {1573-2916}, url = {https://doi.org/10.1023/A:1008306431147}, doi = {10.1023/A:1008306431147}, abstract = {In many engineering optimization problems, the number of function evaluations is severely limited by time or cost. These problems pose a special challenge to the field of global optimization, since existing methods often require more function evaluations than can be comfortably afforded. One way to address this challenge is to fit response surfaces to data collected by evaluating the objective and constraint functions at a few points. These surfaces can then be used for visualization, tradeoff analysis, and optimization. In this paper, we introduce the reader to a response surface methodology that is especially good at modeling the nonlinear, multimodal functions that often occur in engineering. We then show how these approximating functions can be used to construct an efficient global optimization algorithm with a credible stopping rule. The key to using response surfaces for global optimization lies in balancing the need to exploit the approximating surface (by sampling where it is minimized) with the need to improve the approximation (by sampling where prediction error may be high). Striking this balance requires solving certain auxiliary problems which have previously been considered intractable, but we show how these computational obstacles can be overcome.}, language = {en}, number = {4}, urldate = {2019-01-09}, journal = {Journal of Global Optimization}, author = {Jones, Donald R. and Schonlau, Matthias and Welch, William J.}, month = dec, year = {1998}, keywords = {Kriging, Visualization, Stochastic process, Bayesian global optimization, Random function, Response surface}, pages = {455--492}, file = {Jones98.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6BSSS2TM\\Jones98.pdf:application/pdf}, } @mastersthesis{Javar17, title = {Investigation of premixed turbulent flame dynamics by means of {LES} with stochastic fields and tabulated chemistry}, school = {Technical University of Munich / Politecnico Milano}, author = {Javareshkian, Alireza}, year = {2017}, annote = {Link to the publication: https://www.politesi.polimi.it/handle/10589/138459?mode=full\&submit\_simple=Show+full+thesis+record}, annote = {Supervisor: Avdonin}, file = {Javareshkian_TUM.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KJRFWF4K\\Javareshkian_TUM.pdf:application/pdf;Thesis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8S2FPUU7\\Thesis.pdf:application/pdf}, } @incollection{BodenPolif16, address = {Rhode-St-Genèse, BE}, series = {{VKI} {Lecture} {Series} 2015}, title = {Uncertainty quantification applied to aeroacoustic predictions}, isbn = {ISBN-13 978-2-87516-098-0}, number = {VKI LS 2016-02}, booktitle = {Progress in simulation, control and reduction of ventilation noise}, publisher = {Van Karman Institute}, author = {Bodén, H. and Polifke, W.}, editor = {Schram, C.}, year = {2016}, keywords = {published}, file = {Part 1 - Boden and Polifke - 2015 - Uncertainty quantification applied to aeroacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5BX9KRMF\\Part 1 - Boden and Polifke - 2015 - Uncertainty quantification applied to aeroacoustic.pdf:application/pdf}, } @techreport{EvesqPolif03a, type = {Interim {Report}}, title = {Modelling of combustion instabilities in annular combustors}, author = {Evesque, S and Polifke, W}, year = {2003}, file = {Evesque_Polifke_2002_Modelling of combustion instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TESIP2BM\\Evesque_Polifke_2002_Modelling of combustion instabilities.pdf:application/pdf;Evesque_Polifke_2003_Modelling of combustion instabilities in annular combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PTFT5CZU\\Evesque_Polifke_2003_Modelling of combustion instabilities in annular combustors.pdf:application/pdf}, } @incollection{MagDoan2020, title = {Physics-informed data-driven prediction of turbulent reacting flows with {Lyapunov} analysis and sequential data assimilation}, isbn = {978-3-030-44717-5}, booktitle = {Data {Analysis} for {Direct} {Numerical} {Simulation} of {Turbulent} {Combustion}}, publisher = {Springer International Publishing}, author = {Magri, Luca and Doan, Nguyen Anh Khoa}, year = {2020}, keywords = {MediaTUM}, file = {Magri-Doan2020_Chapter_Physics-InformedData-DrivenPre.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NHF4CPG2\\Magri-Doan2020_Chapter_Physics-InformedData-DrivenPre.pdf:application/pdf}, } @mastersthesis{yong_thermoacoustic_2018, title = {Thermoacoustic spectrum and adjoint sensitivity analysis of a swirled premixed combustor with partially reflective boundaries}, school = {TU München}, author = {Yong, Kah Joon}, year = {2018}, note = {Betreuer: Silva}, file = {Yong - 2018 - Thermoacoustic spectrum and adjoint sensitivity an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\U6AEJDEI\\Yong - 2018 - Thermoacoustic spectrum and adjoint sensitivity an.pdf:application/pdf}, } @mastersthesis{Doehn23, address = {München}, title = {Data {Driven} {Modeling} of the {Laminar} {Flame} {Response} using {Universal} {Differential} {Equations}}, url = {http://dx.doi.org/10.13140/RG.2.2.30348.49285}, school = {TU München}, author = {Doehner, Gregor}, year = {2023}, note = {Betreuer: Silva}, file = {Doehner - 2023 - Data Driven Modeling of the Laminar Flame Response.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8NTII5JB\\Doehner - 2023 - Data Driven Modeling of the Laminar Flame Response.pdf:application/pdf}, } @phdthesis{caloudis_modeling_2019, type = {Bachelor {Thesis}}, title = {Modeling the acoustic response of laminar flames by coupling of nonlinear oscillators}, school = {TU München}, author = {Caloudis, Robin}, year = {2019}, note = {Betreuer: Silva}, file = {Caloudis - 2019 - Modeling the acoustic response of laminar flames b.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VSQZ9P64\\Caloudis - 2019 - Modeling the acoustic response of laminar flames b.pdf:application/pdf}, } @mastersthesis{bartl_exploration_2020, title = {Exploration of stochastic approaches for the solution of acoustic equations in two-dimensional fields}, school = {TU München}, author = {Bartl, Sebastian}, year = {2020}, note = {Betreuer: Silva}, file = {Bartl - 2020 - Exploration of stochastic approaches for the solut.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JBU9SPZY\\Bartl - 2020 - Exploration of stochastic approaches for the solut.pdf:application/pdf}, } @article{NilsLang2019, title = {Filtered {Reaction} {Rate} {Modelling} in {Moderate} and {High} {Karlovitz} {Number} {Flames}: an a {Priori} {Analysis}}, volume = {103}, doi = {https://doi.org/10.1007/s10494-019-00038-8}, journal = {Flow, Turbulence and Combustion}, author = {Nilsson, Thommie and Yu, Rixin and Langella, Ivan and Doan, Nguyen Anh Khoa and Swaminathan, Nedunchezhian and Bai, Xue-Song}, year = {2019}, keywords = {published}, pages = {643--665}, file = {Nilsson2019_Article_FilteredReactionRateModellingI.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4JE6D8V5\\Nilsson2019_Article_FilteredReactionRateModellingI.pdf:application/pdf}, } @inproceedings{HaeriPolif19, address = {Phoenix, Arizona, U.S.A.}, series = {{GT2019}-91604}, title = {Time {Domain} {Bloch} {Boundary} {Conditions} for {Efficient} {Simulation} of {Thermoacoustic} {Limit}-{Cycles} in ({Can}-){Annular} {Combustors}}, booktitle = {{ASME} {Turbo} {Expo} 2019: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Haeringer, Matthias and Polifke, Wolfgang}, month = jun, year = {2019}, keywords = {archived, MediaTUM}, file = {Häringer and Polifke - 2019 - Time Domain Bloch Boundary Conditions for Efficien.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZV9I42DG\\Häringer and Polifke - 2019 - Time Domain Bloch Boundary Conditions for Efficien.pdf:application/pdf}, } @article{IavaPeq2021, title = {An a-priori assessment of the {Partially} {Stirred} {Reactor} ({PaSR}) model for {MILD} combustion}, doi = {https://doi.org/10.1016/j.proci.2020.06.234}, journal = {38th Symposium on Combustion}, author = {Iavarone, Salvatore and Pequin, Arthur and Chen, Zhi X. and Doan, Nguyen Anh Khoa and Swaminathan, Nedunchezhian and Parente, Alessandro}, month = jan, year = {2021}, keywords = {MediaTUM, published online}, file = {Iavarone et al. - 2021 - An a-priori assessment of the Partially Stirred Re.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D5T3ZN7A\\Iavarone et al. - 2021 - An a-priori assessment of the Partially Stirred Re.pdf:application/pdf}, } @inproceedings{SchilPolif19a, address = {Indianapolis, Indiana, USA}, title = {Comparative assessment of modeling approaches for acoustic and convective delays in acoustic network tools}, language = {en}, author = {Schily, Felix and Polifke, Wolfgang}, month = aug, year = {2019}, keywords = {rejected}, pages = {5}, file = {Schily und Polifke - Comparative assessment of modeling approaches for .pdf:C\:\\Users\\niebl\\Zotero\\storage\\MW5GG6P8\\Schily und Polifke - Comparative assessment of modeling approaches for .pdf:application/pdf}, } @inproceedings{SchilPolif19, series = {{GT2019}-90906}, title = {On the {Use} of {MISO} and {SISO} {Flame} {Transfer} {Functions}}, abstract = {When characterizing a flame with respect to its acoustic behavior, i.e. identifying a flame transfer function, independence of the flame transfer function from peripherical geometry, that does not directly affect the flame, but has an influence on the burner acoustics, is theoretically only achieved, if the flame transfer function depends on at least two inputs (MISO). However, typical burner layouts allow a good approximation of the flame behavior with a flame transfer function that only depends on one variable (SISO). Although the SISO flame transfer function has become common practice, the error introduced by its use on technically premixed flames has never been quantified systematically. In this work, such an analysis is performed for the case of acoustically stiff fuel injection. As a result we find, that whereas errors in flame transfer functions do often result from the use of a SISO flame model, these errors rarely cause stability mispredictions of the kind, that the SISO flame model predicts stable combustion, when the real (MISO) system is unstable.}, language = {en}, author = {Schily, Felix and Polifke, Wolfgang}, month = jun, year = {2019}, keywords = {withdrawn}, pages = {12}, file = {GT2019-90906.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IHM4VF2S\\GT2019-90906.pdf:application/pdf}, } @article{AvdonJaens18, title = {Uncertainty quantification and sensitivity analysis of thermoacoustic stability with non-intrusive polynomial chaos expansion}, volume = {189}, doi = {10.1016/j.combustflame.2017.11.001}, abstract = {In this paper, non-intrusive polynomial chaos expansion (NIPCE) is used for forward uncertainty quantification and sensitivity analysis of thermoacoustic stability of two premixed flame configurations. The first configuration is a turbulent swirl combustor, modeled by the Helmholtz equation with an n − τ flame model. Uncertain input parameters are the gain and the time delay of the flame, as well as the magnitude and the phase of the outlet reflection coefficient. NIPCE is successfully validated against Monte Carlo simulation. It is observed that the first order expansion suffices to yield accurate results. The second configuration under investigation is a low order network model of a laminar slit burner, with the flame transfer function identified from weakly compressible CFD simulations of laminar reacting flow. Firstly the uncertainty and sensitivity of the growth rate due to three uncertain input parameters of the CFD model – i.e., flow velocity, burner plate temperature and equivalence ratio – are analyzed. A Monte Carlo simulation is no longer possible due to the computational cost of the CFD simulations. Secondly, two additional uncertain parameters are taken into account, i.e., the respective magnitudes of inlet and outlet reflection coefficients. This extension of the analysis does not entail a considerable increase in computational cost, since the additional parameters are included only in the low order network model. In both cases, the second order expansion is sufficient to model the uncertainties in growth rate.}, journal = {Combustion and Flame}, author = {Avdonin, Alexander and Jaensch, Stefan and Silva, Camilo F. and Češnovar, Matic and Polifke, Wolfgang}, month = mar, year = {2018}, keywords = {MediaTUM*, Thermoacoustics, Combustion dynamics, Polynomial chaos expansion, Uncertainty quantification, Thermoacoustic instability, Sensitivity analysis}, pages = {300--310}, file = {AvdonJaens18.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SHG9M2FR\\AvdonJaens18.pdf:application/pdf;ScienceDirect Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\EMXQWHKX\\S0010218017304388.html:text/html}, } @article{DinkeSoika98a, title = {Structure of locally quenched highly turbulent lean premixed flames}, volume = {27}, doi = {10.1016/S0082-0784(98)80482-7}, number = {1}, journal = {Symp (Int.) on Combustion}, author = {Dinkelacker, F. and Soika, A. and Most, D. and Hofmann, D. and Leipertz, A. and Polifke, W. and Döbbeling, K.}, year = {1998}, keywords = {Combustion, Turbulence, Premixed flame, Rev'd}, pages = {857--865}, annote = {The following values have no corresponding Zotero field:PB - The combusion InstituteCY - Boulder, U.S.A}, file = {Dinke+Soika+98.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IMDPBG3G\\Dinke+Soika+98.pdf:application/pdf}, } @inproceedings{DinkeSoika98, address = {Essen, Germany}, series = {10. {Int}. {VGB}-{Konferenz}}, title = {Untersuchungen zur {Verbrennungsstruktur} in turbulenten industriellen {Drallflammen}}, booktitle = {10. {Internationale} {VGB}-{Konferenz} ''{Forschung} für die {Kraftwerkstechnik} 1998''}, author = {Dinkelacker, F and Soika, A. and Most, D. and Leipertz, A. and Döbbeling, K. and Polifke, W.}, month = feb, year = {1998}, annote = {The following values have no corresponding Zotero field:CY - Essen, Germany}, file = {Dinkelacker et al_1998_Untersuchungen zur Verbrennungsstruktur in turbulenten industriellen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QCRXADKU\\Dinkelacker et al_1998_Untersuchungen zur Verbrennungsstruktur in turbulenten industriellen.pdf:application/pdf}, } @article{hansinger_deep_2020, title = {Deep {Residual} {Networks} for {Flamelet}/progress {Variable} {Tabulation} with {Application} to a {Piloted} {Flame} with {Inhomogeneous} {Inlet}}, issn = {0010-2202, 1563-521X}, url = {https://www.tandfonline.com/doi/full/10.1080/00102202.2020.1822826}, doi = {10.1080/00102202.2020.1822826}, language = {en}, urldate = {2020-10-26}, journal = {Combustion Science and Technology}, author = {Hansinger, Maximilian and Ge, Yipeng and Pfitzner, Michael}, month = sep, year = {2020}, pages = {1--27}, } @inproceedings{KomarTay-W08, address = {Berlin, Germany}, title = {Modeling the effect of heat loss on flame stabilization in shear layers}, url = {https://www.researchgate.net/profile/Wolfgang_Polifke/publication/319351667_MODELING_THE_EFFECT_OF_HEAT_LOSS_ON_FLAME_STABILIZATION_IN_SHEAR_LAYERS/links/59a679b3aca272895c166c67/MODELING-THE-EFFECT-OF-HEAT-LOSS-ON-FLAME-STABILIZATION-IN-SHEAR-LAYERS.pdf}, booktitle = {Int. {Conf}. on {Jets}, {Wakes} and {Separated} {Flows}}, publisher = {Technical University Berlin}, author = {Komarek, Thomas and Tay-Wo-Chong, Luis and Zellhuber, Matthieu and Huber, Andreas and Polifke, Wolfgang}, month = sep, year = {2008}, keywords = {Fluid Dynamics, Turbulence, LES, Mixing}, file = {Komarek et al_2008_Modeling the effect of heat loss on flame stabilization in shear layers.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TSUPHFFQ\\Komarek et al_2008_Modeling the effect of heat loss on flame stabilization in shear layers.pdf:application/pdf}, } @article{zellhuber_erratum_2014, title = {Erratum}, volume = {18}, issn = {1364-7830}, url = {http://dx.doi.org/10.1080/13647830.2014.894313}, doi = {10.1080/13647830.2014.894313}, number = {1}, journal = {Combustion Theory and Modelling}, author = {Zellhuber, Mathieu and Schuermans, Bruno and Polifke, W.}, month = jan, year = {2014}, keywords = {published}, pages = {186--186}, annote = {doi: 10.1080/13647830.2014.894313}, file = {Zellhuber et al_2014_Erratum.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SPISXHSS\\Zellhuber et al_2014_Erratum.pdf:application/pdf}, } @article{AvdonMeind19, title = {Thermoacoustic analysis of a laminar premixed flame using a linearized reacting flow solver}, volume = {37}, issn = {15407489}, doi = {10.1016/j.proci.2018.06.142}, language = {en}, number = {4}, journal = {Proceedings of the Combustion Institute}, author = {Avdonin, A. and Meindl, Max and Polifke, W.}, year = {2019}, note = {Citation Key Alias: AvdonMeind18}, keywords = {published, MediaTUM}, pages = {5307--5314}, file = {Avdonin et al_2019_Thermoacoustic analysis of a laminar.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MDRKELJG\\Avdonin et al_2019_Thermoacoustic analysis of a laminar.pdf:application/pdf}, } @phdthesis{Selim10, type = {Doctoral {Thesis}}, title = {Identification and {Analysis} of {Nonlinear} {Heat} {Sources} in {Thermo}-{Acoustic} {Systems}}, url = {http://www.tfd.mw.tum.de/fileadmin/w00bsb/www/Forschung/Dissertationen/2010_Selimefendigil_Identification_and_Analysis_of_Nonlinear_Heat_Sources_in_Thermo-Acoustic_Systems.pdf}, school = {TU München}, author = {Selimefendigil, Fatih}, year = {2010}, file = {Selimefendigil_2010_Identification and Analysis of Nonlinear Heat Sources in Thermo-Acoustic Systems.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZXUZCTK7\\Selimefendigil_2010_Identification and Analysis of Nonlinear Heat Sources in Thermo-Acoustic Systems.pdf:application/pdf}, } @inproceedings{zhang_machine_2015, title = {Machine {Learning} {Methods} for {Data}-{Driven} {Turbulence} {Modeling}}, isbn = {978-1-62410-366-7}, url = {http://arc.aiaa.org/doi/10.2514/6.2015-2460}, doi = {10.2514/6.2015-2460}, language = {en}, urldate = {2017-11-07}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Zhang, Ze Jia and Duraisamy, Karthikeyan}, month = jun, year = {2015}, keywords = {machine learning}, } @article{ziemer_quantitative_2014, series = {4}, title = {Quantitative {Comparison} of {Presumed}-{Number}-{Density} and {Quadrature} {Moment} {Methods} for the {Parameterisation} of {Drop} {Sedimentation}}, volume = {23}, url = {http://dx.doi.org/10.1127/0941-2948/2014/0564}, doi = {10.1127/0941-2948/2014/0564}, journal = {Meteorologische Zeitschrift}, author = {Ziemer, Corinna and Jasor, Gary and Wacker, Ulrike and Beheng, Klaus D. and Polifke, Wolfgang}, year = {2014}, pages = {411--423}, file = {Ziemer et al_2014_Quantitative Comparison of Presumed-Number-Density and Quadrature Moment.pdf:C\:\\Users\\niebl\\Zotero\\storage\\X9HNH6SD\\Ziemer et al_2014_Quantitative Comparison of Presumed-Number-Density and Quadrature Moment.pdf:application/pdf}, } @inproceedings{ziemer_multiscale_2011, address = {Berlin, Germany}, title = {Multiscale {Modelling} of {Drop} {Sedimentation} with {Moment} {Methods}}, booktitle = {{METSTROEM} {Symposium}}, author = {Ziemer, Corinna and Wacker, Ulrike and Polifke, Wolfgang}, month = jun, year = {2011}, } @article{ZimonPolif98, title = {An {Efficient} {Computational} {Model} for {Premixed} {Turbulent} {Combustion} at {High} {Reynolds} {Numbers} based on a {Turbulent} {Flame} {Speed} {Closure}}, volume = {120}, doi = {10.1115/1.2818178}, number = {3}, journal = {J. Eng. Gas Turbines Power}, author = {Zimont, V. A. and Polifke, W. and Bettelini, M. and Weisenstein, W.}, year = {1998}, keywords = {Combustion, Turbulence, Rev'd}, pages = {526--532}, file = {Zimont et al_1998_An Efficient Computational Model for.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8VL6AJJL\\Zimont et al_1998_An Efficient Computational Model for.pdf:application/pdf}, } @inproceedings{witte_optimization_2015, title = {Optimization techniques for power generation from waste heat using thermoacoustic engines}, url = {https://www.mse.tum.de/mse-kolloquien/call/}, booktitle = {{MSE} {Energy} {Colloquium}}, author = {Witte, Armin and Emmert, Thomas and Holzinger, Tobias and Polifke, Wolfgang}, month = jul, year = {2015}, keywords = {published}, file = {Poster_MSE_v009_final.svg:C\:\\Users\\niebl\\Zotero\\storage\\8KBW7CD6\\Poster_MSE_v009_final.svg:text/xml;Poster_Witte_Emmert_Holzinger_Polifke.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7999ZU79\\Poster_Witte_Emmert_Holzinger_Polifke.pdf:application/pdf}, } @techreport{witte_heat_2017, address = {Garching, Germany}, type = {{DFG}-{Abschlussbericht}}, title = {Heat transfer frequency response of a cylinder in pulsating cross flow}, number = {PO710/15-1}, institution = {TU München}, author = {Witte, Armin and Polifke, Wolfgang}, month = jan, year = {2017}, keywords = {MediaTUM*}, file = {Report.pdf:C\:\\Users\\niebl\\Zotero\\storage\\43WH73B6\\Report.pdf:application/pdf}, } @incollection{wu_visualization_2017, series = {{AIAA} {SciTech} {Forum}}, title = {Visualization of {High} {Dimensional} {Turbulence} {Simulation} {Data} using t-{SNE}}, url = {https://arc.aiaa.org/doi/10.2514/6.2017-1770}, urldate = {2018-08-20}, booktitle = {19th {AIAA} {Non}-{Deterministic} {Approaches} {Conference}}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Wu, Jinlong and Wang, Jianxun and Xiao, Heng and Ling, Julia}, month = jan, year = {2017}, doi = {10.2514/6.2017-1770}, file = {Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\2QBS3SUL\\6.html:text/html;Wu et al. - 2017 - Visualization of High Dimensional Turbulence Simul.pdf:C\:\\Users\\niebl\\Zotero\\storage\\95T7T38S\\Wu et al. - 2017 - Visualization of High Dimensional Turbulence Simul.pdf:application/pdf}, } @inproceedings{GuoSilva19a, address = {Porto, Portugal}, title = {Robust {Flame} {Frequency} {Response} {Identification} via a {Multi}-{Fidelity} {Approach}}, author = {Guo, Shuai and Silva, Camilo F and Polifke, Wolfgang}, month = jul, year = {2019}, keywords = {MediaTUM}, file = {Abstract.pdf:C\:\\Users\\niebl\\Zotero\\storage\\77RFSSRG\\Abstract.pdf:application/pdf}, } @article{wan_chemistry_2020, title = {Chemistry reduction using machine learning trained from non-premixed micro-mixing modeling: {Application} to {DNS} of a syngas turbulent oxy-flame with side-wall effects}, volume = {220}, issn = {00102180}, shorttitle = {Chemistry reduction using machine learning trained from non-premixed micro-mixing modeling}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218020302170}, doi = {10.1016/j.combustflame.2020.06.008}, language = {en}, urldate = {2020-10-30}, journal = {Combustion and Flame}, author = {Wan, Kaidi and Barnaud, Camille and Vervisch, Luc and Domingo, Pascale}, month = oct, year = {2020}, pages = {119--129}, file = {Wan et al_2020_Chemistry reduction using machine.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KLAYWWXS\\Wan et al_2020_Chemistry reduction using machine.pdf:application/pdf}, } @article{wenger_comments_2009, title = {Comments on {Solid} {State} {Hydrogen} {Storage} {System} {Design} for {Fuel} {Cell} {Vessels}}, volume = {34}, doi = {10.1016/j.ijhydene.2009.05.072}, journal = {Int. J. of Hydrogen Energy}, author = {Wenger, D and Polifke, W and Schmidt-Ihn, E and Abdel-Baset, T and Maus, S}, year = {2009}, pages = {6265--6270}, file = {Wenger et al_2009_Comments on Solid State Hydrogen Storage System Design for Fuel Cell Vessels.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QZHCGGNI\\Wenger et al_2009_Comments on Solid State Hydrogen Storage System Design for Fuel Cell Vessels.pdf:application/pdf}, } @patent{wenger_hydrogen_2011, title = {Hydrogen {Reservoir} and {Process} for {Filling} a {Hydrogen} {Reservoir}}, number = {US 7,947,119B2}, author = {Wenger, D. and Gölz, D. and Keller, C. and Schmidt-Ihn, E. and Polifke, W.}, year = {2011}, file = {Wenger et al_2011_Hydrogen Reservoir and Process for Filling a Hydrogen Reservoir.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QFGZUUB2\\Wenger et al_2011_Hydrogen Reservoir and Process for Filling a Hydrogen Reservoir.pdf:application/pdf}, } @inproceedings{wenger_modellierung_2009, address = {Darmstadt}, title = {Modellierung eines {Metallhydridspeichers} mit großer {Dynamik}}, booktitle = {{COMSOL} {Multiphysics} {Kolloquium} zur {Chemical} {Engineering}-{Simulation}}, publisher = {COMSOL Multiphysics GmbH}, author = {Wenger, David and Polifke, Wolfgang}, month = jun, year = {2009}, } @inproceedings{wenger_desorption_2008, address = {Hannover}, title = {Desorption {Simulation} of a {Highly} {Dynamic} {Metal} {Hydride} {Storage} {System}}, booktitle = {European {COMSOL} {Conference} 2008}, author = {Wenger, David and Polifke, Wolfgang and Schmidt-Ihn, Eberhard}, month = nov, year = {2008}, file = {Wenger et al_2008_Desorption Simulation of a Highly Dynamic Metal Hydride Storage System.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SZMRTC3P\\Wenger et al_2008_Desorption Simulation of a Highly Dynamic Metal Hydride Storage System.pdf:application/pdf}, } @inproceedings{wieczorek_assessing_2010, address = {Munich, Germany}, title = {Assessing non-normal effects in thermoacoustic systems with non zero baseline flow}, booktitle = {n3l -- {Non}-{Normal} and {Nonlinear} {Effects} in {Aero}- and {Thermoacoustics}}, publisher = {TU München}, author = {Wieczorek, K. and Sensiau, C. and Polifke, W. and Nicoud, F.}, month = may, year = {2010}, file = {Wieczorek et al_2010_Assessing non-normal effects in thermoacoustic systems with non zero baseline.pdf:C\:\\Users\\niebl\\Zotero\\storage\\43DFM3MH\\Wieczorek et al_2010_Assessing non-normal effects in thermoacoustic systems with non zero baseline.pdf:application/pdf}, } @article{WieczSensi11, title = {Assessing non-normal effects in thermoacoustic systems with mean flow}, volume = {23}, issn = {1070-6631, 1089-7666}, url = {http://scitation.aip.org/content/aip/journal/pof2/23/10/10.1063/1.3650418}, doi = {10.1063/1.3650418}, abstract = {In this paper, non-normal interactions in a thermoacoustic system are studied, using a low-order expansion of the state variables in terms of eigenmodes. The thermoacousticeigenmodes are determined as solutions of the Helmholtz equation or the linearized Euler equations, respectively, in the presence of a time-lagged heat source. Subsequently, non-normal effects are evaluated in a post-processing analysis based on the computed eigenmodes. In the case where the eigenmode analysis is based on the linearized Euler equations,effects of a non-zero mean flow velocity can be taken into account. The energy associated with the eigenmodes may then contain contributions of convected entropy and vorticity modes as well as the acoustic field. The notion of transient growth of perturbation energy is thus extended from an expression based on the classical acoustic energy density to a form based on a generalized disturbance energy. The expansion in terms of eigenmodes is computationally efficient, making the approach potentially applicable to complex, 3D configurations including non-trivial boundary conditions and spatio-temporal distributions of heat release fluctuations. In the present paper, the method is applied to a 1D configuration that consists of a duct including a 1D heat source, followed by a choked isentropic nozzle. It is shown that for such a case, it is essential to include the contribution of entropy perturbations in the calculation of the optimal initial perturbation and the maximum transient energy growth. Subsequently, the impact of increasing mean flowMach number and increasing strength of flame/acoustic interaction on non normal effects is assessed in a parameter study.}, number = {10}, urldate = {2014-01-23}, journal = {Phys. Fluids}, author = {Wieczorek, K. and Sensiau, C. and Polifke, W. and Nicoud, F.}, month = oct, year = {2011}, note = {tex.ids= WieczSensi11a publisher: AIP Publishing}, keywords = {Acoustics, Boundary value problems, Eigenvalues, Entropy, Flames, Linear equations, Mach numbers, Normal modes, Thermoacoustics}, pages = {107013--1 -- 14}, file = {Version soumise:C\:\\Users\\niebl\\Zotero\\storage\\AT6W28ND\\Wieczorek et al. - 2011 - Assessing non-normal effects in thermoacoustic sys.pdf:application/pdf;Wieczorek et al_2011_Assessing non-normal effects in thermoacoustic systems with mean flow.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VWISHQK6\\Wieczorek et al_2011_Assessing non-normal effects in thermoacoustic systems with mean flow.pdf:application/pdf}, } @article{wang_analyzing_2012, title = {Analyzing and modeling the dynamic thermal behaviors of direct contact condensers packed with {PCM} spheres}, issn = {0935-1175}, url = {http://dx.doi.org/10.1007/s00161-012-0246-9}, journal = {Continuum Mechanics and Thermodynamics}, author = {Wang, Kai and Hu, Tao and Hassabou, Abdel H. and Spinnler, Markus and Polifke, Wolfgang}, year = {2012}, keywords = {Engineering}, pages = {1--19}, file = {Wang+Hu+12.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J3K46FTS\\Wang+Hu+12.pdf:application/pdf;Wang+Hu+12.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9IEMSTC3\\Wang+Hu+12.pdf:application/pdf}, } @article{weidner_pulsations_2017, title = {Pulsations in {Gas} {Turbine} {Operation}: {Identification} and {Modeling} {With} the {Purpose} of {Online} {Engine} {Monitoring} and {Optimization}}, shorttitle = {Pulsations in {Gas} {Turbine} {Operation}}, url = {http://dx.doi.org/10.1115/GT2017-64348}, doi = {10.1115/GT2017-64348}, abstract = {Lean premixed combustion has become state of the art technology in gas turbines for power generation because of its very low emission potential in the context of tightening pollutant emissions regulations. Lean premixed combustion is yet also prone to combustion instabilities, resulting in thermo-acoustically induced acoustic pressure oscillations (pulsations). Understanding pulsation behavior over an enginés lifetime is of interest to accurately monitor the engine status, as wear and degradation typically affect combustion behavior and result in changes of both pulsations and emissions. Such improved understanding can be exploited for optimizing both the engine operation concept and the design of relevant hardware parts. In return, pulsation and hardware optimization may lead to reduced degradation and thus inherently more robust long-term operational behavior.The study presented here is conducted for one specific gas turbine of GE’s GT24/GT26 fleet with sequential annular combustion. Based on operational data of the examined gas turbine, a semi-empirical modeling approach is introduced to describe the pulsations measured in the first (EV) combustion chamber. The target is to reproduce measured pulsation amplitudes as well as their different behaviors with engine load. The modeling presented here has been focused on pulsations in a distinctive frequency range below 1kHz. A model based on a small set of data obtained from initial commissioning is able to represent the pulsation behavior within a normalized root mean square error of 11\%. Validation with long-term engine data shows that predicted pulsation levels are reasonably matching the initial operation period but increasingly deviate with engine operating time. By using additional data from later engine commissioning and adjustments, the robustness of the model is sensibly increased. Model accuracy on the training dataset remains similar at around 11\%, but validation on the long-term data shows a significant decrease of the normalized root mean square error from over 21\% to below 16\%. Additional model improvements to further reduce prediction errors on long-term data have been also identified.}, urldate = {2017-08-31}, author = {Weidner, Frank S. and Lipperheide, Moritz and Wirsum, Manfred C. and Bernero, Stefano and Gassner, Martin}, month = jun, year = {2017}, pages = {V04BT04A011}, file = {Weidner et al_2017_Pulsations in Gas Turbine Operation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RF474MAB\\Weidner et al_2017_Pulsations in Gas Turbine Operation.pdf:application/pdf}, } @inproceedings{PaschPolif98, address = {Stockholm, Sweden}, title = {Investigation of the {Thermo}-{Acoustic} {Characteristics} of a {Lean} {Premixed} {Gas} {Turbine} {Burner}}, volume = {Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations}, doi = {10.1115/98-GT-582}, booktitle = {{ASME} 1998 {International} {Gas} {Turbine} and {Aeroengine} {Congress} and {Exhibition}}, publisher = {ASME}, author = {Paschereit, Christian O. and Polifke, Wolfgang}, year = {1998}, keywords = {Combustion, Thermoacoustics, MediaTUM, Premixed flame, Frequency response, Rev'd}, pages = {V003T06A057}, file = {Paschereit_Polifke_1998_Investigation of the Thermo-Acoustic Characteristics of a Lean Premixed Gas.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9GV5CS9M\\Paschereit_Polifke_1998_Investigation of the Thermo-Acoustic Characteristics of a Lean Premixed Gas.pdf:application/pdf}, } @incollection{Polif04a, address = {Rhode-St-Genèse, BE}, series = {{VKI} {LS} 2004-05}, title = {Combustion {Instabilities}}, isbn = {2-930389-54-0}, booktitle = {Advances in {Aeroacoustics} and {Applications}}, publisher = {Von Karman Institute}, author = {Polifke, W.}, editor = {Anthoine, J. and Hirschberg, A.}, year = {2004}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, annote = {Polif04c}, file = {Polifke_2004_Combustion Instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NUGSMNNG\\Polifke_2004_Combustion Instabilities.pdf:application/pdf}, } @inproceedings{Polif11, address = {Cardiff, UK}, title = {Thermo-{Acoustic} {Instability} {Potentiality} of a {Premix} {Burner}}, booktitle = {European {Combustion} {Meeting}, {ECM2011}}, publisher = {British Section of the Combustion Institute}, author = {Polifke, Wolfgang}, month = jul, year = {2011}, note = {tex.ids: Polif11j}, keywords = {Combustion, Thermoacoustics, Small gain theorem}, file = {Polifke_2011_Thermo-acoustic instability potentiality of a premix burners.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6VMUPTA5\\Polifke_2011_Thermo-acoustic instability potentiality of a premix burners.pdf:application/pdf}, } @techreport{Tourn15, title = {Acoustic characterization of orifice structures by incompressible unsteady {RANS} simulations}, abstract = {Report of Secondment period at TUM}, author = {Tournadre, J.}, year = {2015}, note = {tex.ids: Tourn15a}, annote = {Dear Professor Polifke, dear Kilian,   Please find in enclosure the reviewed version of the report for my secondment period with you. I gathered all the work we did with Kilian from the side of the incompressible simulations, from the theory to the results. There are also new results/extra explanations for you (which I did during the redaction of this report) like on the linear SI of my incompressible data (which succeed with Stephan WHI tool), the comparison of 2 approaches for my post-processing that we didn’t thought about it during my time in Munich and the description of nonlinear regime features (period doubling and higher harmonics). I tried to be complete in this document. I would be happy if you can give me your feedback on this report. Any comments, interpretations of the results which could differ from my ideas, and questions are welcomed.   Kilian, feel free to use what is interesting for you from this report to help you write your annual project report. Professor Polifke, I would like your opinion on the contents of this report which could be material for conference/publication. I would be glad if we could finalize this with Kilian if you and Paula judge that our work is worth. As Kilian already knows, I am in vacation this week and the next one, but I will be available by mails partially in case you need.   Best regards,   Jonathan Tournadre Research Engineer   Siemens Industry Software NV Digital Factory Product Lifecycle Management Simulation and Test Solutions Interleuvenlaan 68 B-3001 Leuven, Belgium Tel.: +32 16 38 4339 Mobile: +324  85 92 78 73 jonathan.tournadre@siemens.com www.siemens.com/plm}, file = {Tournadre_Acoustic characterization of orifice structures by incompressible unsteady RANS.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DQ5SFE5X\\Tournadre_Acoustic characterization of orifice structures by incompressible unsteady RANS.pdf:application/pdf}, } @inproceedings{ZellhTay-W11, address = {Cardiff, UK}, title = {Non-{Linear} {Flame} {Response} at {Small} {Perturbation} {Amplitudes} -- {Consequences} for {Analysis} of {Thermoacoustic} {Instabilities}}, author = {Zellhuber, M. and Tay-Wo-Chong, Luis and Polifke, W.}, month = jun, year = {2011}, keywords = {Combustion, Thermoacoustics, Auto-ignition, Delay variations, Pressure impact}, file = {Zellhuber et al_2011_Non-Linear Flame Response at Small Perturbation Amplitudes -- Consequences for.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P5QHMKRJ\\Zellhuber et al_2011_Non-Linear Flame Response at Small Perturbation Amplitudes -- Consequences for.pdf:application/pdf}, } @article{SelimPolif11, series = {4}, title = {A nonlinear frequency domain model for limit cycles in thermoacoustic systems with modal coupling}, volume = {3}, issn = {1756-8277}, doi = {10.1260/1756-8277.3.4.303}, journal = {Int. J. Spray Comb. Dynamics}, author = {Selimefendigil, F. and Polifke, W.}, year = {2011}, pages = {303--330}, file = {Selimefendigil_Polifke_2011_A frequency domain system model with coupled modes for limit cycle prediction.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7JCIANEN\\Selimefendigil_Polifke_2011_A frequency domain system model with coupled modes for limit cycle prediction.pdf:application/pdf}, } @phdthesis{Carde14, type = {{PhD} {Thesis}}, title = {Influence of {Enhanced} {Heat} {Transfer} in {Pulsating} {Flow} on the {Damping} {Characteristics} of {Resonator} {Rings}}, url = {http://www.tfd.mw.tum.de/fileadmin/w00bsb/www/Forschung/Dissertationen/Cardenas_2014_Influence_of_Enhanced_Heat_Transfer_in_Pulsating_Flow_on_the_Damping_Characteristics_of_Resonator_Rings.pdf}, school = {TU Munich}, author = {Cárdenas Miranda, Alejandro}, year = {2014}, file = {Cárdenas Miranda - 2014 - Influence of Enhanced Heat Transfer in Pulsating F.pdf:C\:\\Users\\niebl\\Zotero\\storage\\X279TB3A\\Cárdenas Miranda - 2014 - Influence of Enhanced Heat Transfer in Pulsating F.pdf:application/pdf}, } @article{magri_first-principles_2020, title = {First-principles machine learning for {COVID}-19 modeling}, volume = {53}, number = {5}, journal = {SIAM News}, author = {Magri, Luca and Doan, Nguyen Anh Khoa}, month = jun, year = {2020}, keywords = {MediaTUM, Archived}, file = {sn_June2020.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PRSKT9N4\\sn_June2020.pdf:application/pdf}, } @article{doan_identification_2021, title = {Identification of combustion mode under {MILD} conditions using {Chemical} {Explosive} {Mode} {Analysis}}, doi = {https://doi.org/10.1016/j.proci.2020.06.293}, journal = {38th Symposium on Combustion}, author = {Doan, Nguyen Anh Khoa and Bansude, Shuba and Osawa, Kosuke and Minamoto, Yuki and Lu, Tianfeng and Chen, Jacqueline H. and Swaminathan, Nedunchezhian}, month = jan, year = {2021}, keywords = {MediaTUM, Archived}, file = {1-s2.0-S1540748920303850-main.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8MZKFF84\\1-s2.0-S1540748920303850-main.pdf:application/pdf}, } @inproceedings{KopitHuber05, address = {Reno-Tahoe, Nevada, USA}, series = {{GT2005}-68797}, title = {Thermoacoustic {Stability} {Analysis} of an {Annular} {Combustion} {Chamber} with {Acoustic} {Low} {Order} {Modeling} and {Validation} {Against} {Experiment}}, url = {http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1571662}, doi = {doi:10.1115/GT2005-68797}, urldate = {2014-11-10}, booktitle = {{ASME} {Turbo} {Expo} 2005: {Power} for {Land}, {Sea}, and {Air}}, publisher = {American Society of Mechanical Engineers}, author = {Kopitz, Jan and Huber, Andreas and Sattelmayer, Thomas and Polifke, Wolfgang}, year = {2005}, keywords = {Combustion, Turbulence, Rev'd}, pages = {583--593}, file = {Kopitz et al_2005_Thermoacoustic Stability Analysis of an Annular Combustion Chamber with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\E9VTT3B8\\Kopitz et al_2005_Thermoacoustic Stability Analysis of an Annular Combustion Chamber with.pdf:application/pdf;Kopitz et al_2005_Thermoacoustic Stability Analysis of an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3VGF7PCG\\Kopitz et al_2005_Thermoacoustic Stability Analysis of an.pdf:application/pdf}, } @phdthesis{Merk18, address = {München, Germany}, type = {Ph.{D}. {Thesis}}, title = {Identification of {Combustion} {Dynamics} and {Noise} of {Confined} {Turbulent} {Flames}}, url = {https://mediatum.ub.tum.de/doc/1444929/1444929.pdf}, school = {TU München}, author = {Merk, Malte}, year = {2018}, file = {Merk_2018_Identification of Combustion Dynamics and Noise of Confined Turbulent Flames.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BHMSEZ85\\Merk_2018_Identification of Combustion Dynamics and Noise of Confined Turbulent Flames.pdf:application/pdf}, } @article{DoanPolif19, title = {Physics-{Informed} {Echo} {State} {Networks} for {Chaotic} {Systems} {Forecasting}}, volume = {11539}, doi = {10.1007/978-3-030-22747-0_15}, abstract = {In this work, we propose a physics-informed Echo State Networks (ESN) to predict the evolution of chaotic systems. Compared to conventional echo state networks, the physics-informed ESN are trained to solve supervised learning tasks while ensuring that their predictions do not violate the given physical laws. This is done by introducing an additional loss during the training of the ESN, which penalizes non-physical predictions by the ESN. The potential of this approach is demonstrated on the Lorenz system where the obtained predictability horizon of the physics-informed ESN was improved by up to nearly 2 Lyapunov times compared to conventional ESN without the need of additional training data. These results illustrate the potential of using machine learning tools combined with prior physical knowledge to improve the time-accurate prediction of chaotic dynamical systems.}, journal = {Lecture Notes in Computer Science - ICCS 2019}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, month = jun, year = {2019}, keywords = {MediaTUM, Archived}, pages = {192--198}, file = {Doan et al_2019_Physics-Informed Echo State Networks.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4KM68MAP\\Doan et al_2019_Physics-Informed Echo State Networks.pdf:application/pdf}, } @article{SilvaPolif20, title = {Phasor analysis of thermoacoustic instability to quantify critical conditions in axial combustors}, author = {Silva, C. F. and Polifke, W.}, year = {2019}, keywords = {rejected}, file = {Silva and Polifke - 2020 - Phasor analysis of thermoacoustic instability to q.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BMPNX38U\\Silva and Polifke - 2020 - Phasor analysis of thermoacoustic instability to q.pdf:application/pdf}, } @incollection{Evesq04a, address = {Brussels, BE}, series = {{VKI} {LS} 2004-05}, title = {Active control of combustion instabilities}, number = {ISBN 2-930389-54-0}, booktitle = {Advances in {Aeroacoustics} and {Applications}}, publisher = {Von Karman Institute}, author = {Evesque, S.}, editor = {Anthoine, J. and Hirschberg, A.}, year = {2004}, keywords = {Stability, Thermo-acoustics, Control, Premixed flame}, file = {Evesque_2004_Advances in Aeroacoustics and Applications.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9PDASDAF\\Evesque_2004_Advances in Aeroacoustics and Applications.pdf:application/pdf}, } @article{LiangLee02, title = {Proper {Orthogonal} {Decomposition} and {Its} {Applications}—{Part} {I}: {Theory}}, volume = {252}, issn = {0022-460X}, shorttitle = {Proper {Orthogonal} {Decomposition} and {Its} {Applications}—{Part} {I}}, url = {http://www.sciencedirect.com/science/article/pii/S0022460X01940416}, doi = {10.1006/jsvi.2001.4041}, abstract = {In view of the increasing popularity of the application of proper orthogonal decomposition (POD) methods in engineering fields and the loose description of connections among the POD methods, the purpose of this paper is to give a summary of the POD methods and to show the connections among these methods. Firstly, the derivation and the performance of the three POD methods: Karhunen–Loève decomposition (KLD), principal component analysis (PCA), and singular value decomposition (SVD) are summarized, then the equivalence problem is discussed via a theoretical comparison among the three methods. The equivalence of the matrices for processing, the objective functions, the optimal basis vectors, the mean-square errors, and the asymptotic connections of the three methods are demonstrated and proved when the methods are used to handle the POD of discrete random vectors.}, number = {3}, urldate = {2018-08-20}, journal = {Journal of Sound and Vibration}, author = {Liang, Y. C. and Lee, H. P. and Lim, S. P. and Lin, W. Z. and Lee, K. H. and Wu, C. G.}, month = may, year = {2002}, pages = {527--544}, file = {Liang et al. - 2002 - PROPER ORTHOGONAL DECOMPOSITION AND ITS APPLICATIO.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M76KUJJH\\Liang et al. - 2002 - PROPER ORTHOGONAL DECOMPOSITION AND ITS APPLICATIO.pdf:application/pdf}, } @inproceedings{Tay-WKomar10a, address = {Bad Reichenhall, Germany}, title = {{LES}-based {Identification} of the {Dependence} of {Premix} {Flame} {Dynamics} on {Swirler} {Position}}, booktitle = {{EFMC}-8 (8th {European} {Fluid} {Mechanics} {Conference})}, author = {Tay-Wo-Chong, L. and Komarek, T. and Föller, S. and Polifke, W.}, month = sep, year = {2010}, } @phdthesis{merkle_boosting_2021, type = {Bachelor {Thesis}}, title = {Boosting the {Training} of {Physics}-{Informed} {Neural} {Networks} with {Transfer} {Learning}}, school = {TUM}, author = {Merkle, Marius}, year = {2021}, file = {Merkle_2021_Boosting the Training of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SSZMMTRQ\\Merkle_2021_Boosting the Training of.pdf:application/pdf}, } @mastersthesis{maier_simulation_2018, address = {Garching, Germany}, title = {Simulation und {Optimierung} von {Hochvoltspeicher}-{Kühlsystemen} mithilfe von {Modellen} reduzierter {Ordnung}}, language = {Deutsch}, school = {Technische Universität München}, author = {Maier, Christian}, month = apr, year = {2018}, note = {Supervisor: Meindl}, file = {Maier - 2018 - Simulation und Optimierung von Hochvoltspeicher-Kü.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KI9WQ3J3\\Maier - 2018 - Simulation und Optimierung von Hochvoltspeicher-Kü.pdf:application/pdf}, } @phdthesis{Maure18, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Numerische {Stabilitätsuntersuchung} der akustischen {Kopplung} von {Resonator} und {Flammenmodell}}, url = {https://mediatum.ub.tum.de/doc/1462439/1462439.pdf}, language = {German}, school = {TU München}, author = {Maurer, Michaela}, year = {2018}, note = {Betreuer: van Buren}, file = {Maurer - 2018 - Numerische Stabilitätsuntersuchung der akustischen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IQ54JKU7\\Maurer - 2018 - Numerische Stabilitätsuntersuchung der akustischen.pdf:application/pdf}, } @phdthesis{Hartm18, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Validation of {Acoustic} {Boundary} {Conditions} in {OpenFOAM}}, url = {https://mediatum.ub.tum.de/doc/1462849/1462849.pdf}, language = {English}, school = {TU München}, author = {Hartmann, Ulrich}, year = {2018}, note = {Betreuer: van Buren}, file = {Hartmann - 2018 - Validation of Acoustic Boundary Conditions in Ope.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T4N9ARK3\\Hartmann - 2018 - Validation of Acoustic Boundary Conditions in Ope.pdf:application/pdf}, } @phdthesis{Lian18, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Analytical and {Numerical} {Investigation} of the {Damping} {Behavior} of a {Quarter} {Wave} {Resonator} using an {Incompressible} {Approach}}, url = {https://mediatum.ub.tum.de/doc/1452924/1452924.pdf}, language = {English}, school = {TU München}, author = {Lian, Yujie}, year = {2018}, note = {Betreuer: van Buren}, file = {Lian - 2018 - Analytical and Numerical Investigation of the Damp.pdf:C\:\\Users\\niebl\\Zotero\\storage\\595L559K\\Lian - 2018 - Analytical and Numerical Investigation of the Damp.pdf:application/pdf}, } @phdthesis{Ottin18, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Numerical {Simulation} of {Enhanced} {Heat} {Conduction} in {Oscillating} {Laminar} {Parallel}-{Plate} {Flow} under an {Axial} {Temperature} {Gradient}}, url = {https://mediatum.ub.tum.de/doc/1538023/1538023.pdf}, language = {English}, school = {TU München}, author = {Ottinger, Joachim}, year = {2018}, note = {Betreuer: van Buren}, file = {Ottinger - 2018 - Numerical Simulation of Enhanced Heat Conduction i.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NQZKVJRD\\Ottinger - 2018 - Numerical Simulation of Enhanced Heat Conduction i.pdf:application/pdf}, } @phdthesis{Kollm18, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Instationäre {Wärmeleitung} in dickwandigen {Komponenten} konventioneller {Kraftwerke}}, url = {https://mediatum.ub.tum.de/doc/1442264/1442264.pdf}, language = {German}, school = {TU München}, author = {Kollmeier, Daniel}, year = {2018}, note = {Betreuer: van Buren}, file = {Kollmeier - 2018 - Instationäre Wärmeleitung in dickwandigen Komponen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MNMW6DN8\\Kollmeier - 2018 - Instationäre Wärmeleitung in dickwandigen Komponen.pdf:application/pdf}, } @incollection{BurenPolif20b, series = {Notes on {Numerical} {Fluid} {Mechanics} and {Multidisciplinary} {Design}}, title = {Heat {Transfer} in {Pulsating} {Flow} and its {Impact} on {Temperature} {Distribution} and {Damping} {Performance} of {Resonators}}, isbn = {978-3-030-53847-7}, url = {http://link.springer.com/10.1007/978-3-030-53847-7}, language = {en}, number = {146}, booktitle = {Future {Space}-{Transport}-{System} {Components} under {High} {Thermal} and {Mechanical} {Loads}}, publisher = {Springer International Publishing}, author = {Buren, S. van and Polifke, W.}, editor = {Schröder, W. and Adams, N. A. and Haidn, O. J. and Radespiel, R. and Sattelmayer, T and Schröder, W. and Weigand, B.}, year = {2021}, doi = {10.1007/978-3-030-53847-7}, keywords = {MediaTUM}, pages = {97--111}, file = {Buren and Polifke - 2020 - Heat Transfer in Pulsating Flow and its Impact on .pdf:C\:\\Users\\niebl\\Zotero\\storage\\2R8HC57R\\Buren and Polifke - 2020 - Heat Transfer in Pulsating Flow and its Impact on .pdf:application/pdf}, } @phdthesis{burth_time_2021, title = {Time {Domain} {Modeling} of the {Nonlinear} {Flame} {Response} by {Coupled} {Nonlinear} {Oscillators}}, abstract = {B.A. Thesis}, school = {TU München}, author = {Burth, Johannes Kaspar}, year = {2021}, note = {Silva}, file = {Burth_2021_Time Domain Modeling of the Nonlinear.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UALY24KX\\Burth_2021_Time Domain Modeling of the Nonlinear.pdf:application/pdf}, } @inproceedings{CelanSilve15, address = {Krakov}, title = {Heat {Flux} {Evaluation} {Methods} for a {Single} {Element} {Heat}-{Sink} {Chamber}}, abstract = {The presented study aims to contribute to the understanding of the thermal transfer and mixing processes for the new propellant combination GOX/GCH4. A single element shear coaxial injector combustion chamber is operated at heat transfer conditions typical for rocket engines to provide a benchmark test case for the validation of combustion modelling codes. To investigate the heat transfer characteristics, different methods which make use of a series of wall temperature measurements are performed. An FE as well as an FD analysis, both for a 2D and for a 3D model, are developed and evaluated. The key parameters and calculation methodologies are introduced. Experimental data, obtained with the heat-sink single element combustion chamber at a pressure of 2 MPa and a mixture ratio of 2.2 (CASE A) and 3.4 (CASE B), are used to validate the codes. Results obtained from the different calculation methods are analyzed and compared. A good agreement is shown for all evaluated load points.}, language = {en}, author = {Celano, M P and Silvestri, S and Pauw, J and Perakis, N and Schily, F and Suslov, D and Haidn, O J}, month = jun, year = {2015}, file = {Celano et al. - Heat Flux Evaluation Methods for a Single Element .pdf:C\:\\Users\\niebl\\Zotero\\storage\\EJ6Q8QSP\\Celano et al. - Heat Flux Evaluation Methods for a Single Element .pdf:application/pdf}, } @inproceedings{SchilParas15, address = {Waterloo, ON}, title = {{CFD} {Study} of a {Savonius} {Wind} {Turbine} on a {Rooftop}}, abstract = {Savonius turbines have the best performance at low wind speeds, which among other attributes makes them an interesting concept for decentralized power generation in urban areas. Placing a turbine on the roof of a building sounds advantageous, because it is raising the turbine at a higher elevation in the atmospheric boundary layer, but the turbine performance is also benefitting from the accelerated flow at the corner of the building. Nevertheless the ideal turbine and the ideal position are difficult to identify. To this end CFD simulations are employed to perform a parametric study. The turbine is mounted near the windward edge of the roof of a building. Varied parameters are the position of the turbine and the tip speed ratio. The objective is to optimize the parameters mentioned, yielding for a maximum power coefficient. As the reference case, a slow wind directly facing one side of the building is chosen. A spatial and temporal convergence study will also be performed for our 3-dimensional simulation.}, language = {en}, author = {Schily, Felix and Paraschivoiu, Marius}, month = jun, year = {2015}, file = {Schily and Paraschivoiu - CFD Study of a Savonius Wind Turbine on a Rooftop.pdf:C\:\\Users\\niebl\\Zotero\\storage\\X65KUVK8\\Schily and Paraschivoiu - CFD Study of a Savonius Wind Turbine on a Rooftop.pdf:application/pdf}, } @inproceedings{doehner_nonlinear_2021, address = {Online}, title = {Nonlinear flame response modeling using coupled oscillators}, author = {Doehner, Gregor and Haeringer, Matthias and Silva, Camilo F}, year = {2021}, file = {Doehner et al. - 2021 - Nonlinear flame response modeling using coupled os.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SQJDTHH9\\Doehner et al. - 2021 - Nonlinear flame response modeling using coupled os.pdf:application/pdf}, } @article{DBLP:journals/corr/abs-2102-12923, title = {Machine learning-based optimal mesh generation in computational fluid dynamics}, volume = {abs/2102.12923}, url = {https://arxiv.org/abs/2102.12923}, journal = {CoRR}, author = {Huang, Keefe and Krügener, Moritz and Brown, Alistair and Menhorn, Friedrich and Bungartz, Hans-Joachim and Hartmann, Dirk}, year = {2021}, note = {arXiv: 2102.12923 tex.bibsource: dblp computer science bibliography, https://dblp.org tex.biburl: https://dblp.org/rec/journals/corr/abs-2102-12923.bib tex.timestamp: Tue, 02 Mar 2021 12:11:01 +0100}, file = {Huang et al_2021_Machine learning-based optimal mesh.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SHCLDJA9\\Huang et al_2021_Machine learning-based optimal mesh.pdf:application/pdf}, } @article{bonnaire_intrusive_2021, title = {Intrusive generalized polynomial chaos with asynchronous time integration for the solution of the unsteady {Navier}–{Stokes} equations}, volume = {223}, issn = {00457930}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0045793021001195}, doi = {10.1016/j.compfluid.2021.104952}, language = {en}, urldate = {2021-05-05}, journal = {Computers \& Fluids}, author = {Bonnaire, P. and Pettersson, P. and Silva, C.F.}, month = jun, year = {2021}, keywords = {published}, pages = {104952}, file = {Bonnaire et al. - 2020 - Intrusive generalized polynomial chaos with asynch.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UR2CPYZS\\Bonnaire et al. - 2020 - Intrusive generalized polynomial chaos with asynch.pdf:application/pdf}, } @article{WittePolif17, title = {Dynamics of {Unsteady} {Heat} {Transfer} in {Pulsating} {Flow} {Across} a {Cylinder}}, volume = {109}, doi = {10.1016/j.ijheatmasstransfer.2017.02.072}, abstract = {The unsteady heat transfer between a cylinder and pulsating cross-flow is investigated for small perturbations of flow velocity. In this regime the cycle-averaged heat transfer is constant and fluctuations of flow variables can be described as linear, time-invariant dynamics. Numerical simulation of the response to a sudden increase of the free stream velocity allows to visualize and interpret physically the flow and heat transfer dynamics. Broadband excitation combined with linear system identification yields quantitative predictions of the frequency response of heat transfer over a range of Reynolds and Strouhal numbers. It is concluded that the heat transfer dynamics are governed by several time scales, corresponding to the response times of the velocity field and temperature field, respectively. The interaction of the different time lags leads to a non-trivial dependence of the heat transfer frequency response on Strouhal and Reynolds numbers. The frequency response functions exhibit a low-pass behavior with vanishing amplitudes The unsteady heat transfer between a cylinder and pulsating cross-flow is investigated for small perturbations of flow velocity. In this regime the cycle-averaged heat transfer is constant and fluctuations of flow variables can be described as linear, time-invariant dynamics. Numerical simulation of the response to a sudden increase of the free stream velocity allows to visualize and interpret physically the flow and heat transfer dynamics. Broadband excitation combined with linear system identification yields quantitative predictions of the frequency response of heat transfer over a range of Reynolds and Strouhal numbers. It is concluded that the heat transfer dynamics are governed by several time scales, corresponding to the response times of the velocity field and temperature field, respectively. The interaction of the different time lags leads to a non-trivial dependence of the heat transfer frequency response on Strouhal and Reynolds numbers. The frequency response functions exhibit a low-pass behavior with vanishing amplitudes and a phase lag slightly above -pi/2 at high Strouhal numbers. Excess gain above the quasi-steadystate value of the heat transfer frequency response is observed for Strouhal numbers of order unity and Reynolds numbers of order ten.}, language = {en}, number = {C}, journal = {Int. J. Heat and Mass Transfer}, author = {Witte, Armin and Polifke, Wolfgang}, month = feb, year = {2017}, keywords = {MediaTUM*, archived}, pages = {1111--1131}, file = {Witte_Polifke_2017_Dynamics of unsteady heat transfer in pulsating flow across a cylinder.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3J6U4Z58\\Witte_Polifke_2017_Dynamics of unsteady heat transfer in pulsating flow across a cylinder.pdf:application/pdf}, } @inproceedings{witte_modeling_2016, address = {Malaga, Spain}, title = {Modeling the {Heat} {Transfer} and {Skin} {Friction} {Frequency} {Response} of a {Cylinder} in {Cross}-{Flow} - a {Unifying} {Perspective}}, isbn = {978-1-77592-124-0}, abstract = {The dynamic behavior of skin friction and heat release of a cylinder in pulsating cross-flow are investigated. Existing analytical solutions are presented as transfer functions versus frequency, known from control theory. Newly found expressions are given for Reynolds number ranges, where no appropriate model exist until now. These expressions are obtained by the combination of CFD simulation and system identification (CFD/SI). In the CFD/SI approach time series are generated by exciting inlet velocity fluctuations over a wide range of frequencies in one single CFD simulation. Time series are acquired for heat release, skin friction and velocity forcing, and then post-processed with system identification tools. Direct numerical simulations are conducted for mean flow Reynolds numbers between 0.1 and 40, solving the incompressible Navier-Stokes equations in a 2D domain using a finite volume approach. The system identification framework provides methods to identify a mathematical model for the response in heat release and skin friction to velocity fluctuations from data series. It can be confirmed that Bayly’s model for heat release fluctuations performs well at low Reynolds numbers. Lighthill’s model, often used in the assessment of Rijke tubes, is more accurate for high Reynolds numbers, but the time constant was underpredicted for Reynolds numbers of order 10. For the range above a Reynolds number of 0.4 a unifying model could be developed. This model especially excels at Reynolds numbers of order 10. Available models for skin friction usually match the simulated data up to a point, but do not give any dependence on Reynolds number which is corrected here. The expressions presented allow insight in the physics of the dynamic behavior of a cylinder in pulsating cross flow and also facilitate the use of these models in further investigations.}, booktitle = {12th {Int}. {Conf}. on {Heat} {Transfer}, {Fluid} {Mechanics} and {Thermodynamics}}, publisher = {HEFAT}, author = {Witte, Armin and Polifke, Wolfgang}, month = jul, year = {2016}, keywords = {archived, MediaTUM}, pages = {1022--1027}, file = {presentation_Witte_HEFAT.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W2W9VTRK\\presentation_Witte_HEFAT.pdf:application/pdf;Rights.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T3DW97FN\\Rights.pdf:application/pdf;Witte and Polifke - 2016 - Modeling the Heat Transfer and Skin Friction Frequ.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AQDQVP7Z\\Witte and Polifke - 2016 - Modeling the Heat Transfer and Skin Friction Frequ.pdf:application/pdf}, } @inproceedings{witte_heat_2015, address = {Göttingen}, title = {Heat transfer frequency response of a cylinder in pulsating laminar cross flow}, booktitle = {17. {STAB}-{Workshop}}, author = {Witte, Armin and Polifke, Wolfgang}, year = {2015}, keywords = {archived, MediaTUM}, file = {Presentation WittePolif15_STAB.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RJUCFUP5\\Presentation WittePolif15_STAB.pdf:application/pdf;Witte and Polifke - 2015 - Heat transfer frequency response of a cylinder in .pdf:C\:\\Users\\niebl\\Zotero\\storage\\HS6SRPQ5\\Witte and Polifke - 2015 - Heat transfer frequency response of a cylinder in .pdf:application/pdf}, } @article{AlbayBezgi17, title = {Response of a {Swirl} {Flame} to {Inertial} {Waves}}, volume = {10}, issn = {1756-8277, 1756-8285}, url = {http://journals.sagepub.com/doi/10.1177/1756827717747201}, doi = {10.1177/1756827717747201}, language = {en}, number = {4}, urldate = {2018-12-02}, journal = {Int. J. Spray and Combustion Dynamics}, author = {Albayrak, Alp and Bezgin, Deniz A and Polifke, Wolfgang}, year = {2018}, keywords = {archived, MediaTUM}, pages = {277--286}, file = {Albayrak et al_2018_Response of a Swirl Flame to Inertial.pdf:C\:\\Users\\niebl\\Zotero\\storage\\N9CGDQFI\\Albayrak et al_2018_Response of a Swirl Flame to Inertial.pdf:application/pdf}, } @inproceedings{AlbayStein17, address = {Charlotte, NC, USA}, series = {{GT2017}-64929}, title = {Convective {Scaling} of {Intrinsic} {Thermo}-{Acoustic} {Eigenfrequencies} of a {Premixed} {Swirl} {Combustor}}, booktitle = {{ASME} {Turbo} {Expo} 2017: {Turbine} {Technical} {Conference} and {Exposition}}, author = {Albayrak, Alp and Steinbacher, Thomas and Komarek, Thomas and Polifke, Wolfgang}, month = jun, year = {2017}, keywords = {archived, MediaTUM}, file = {GT2017-64929.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UWEINNUH\\GT2017-64929.pdf:application/pdf;Presentation - Convective Scaling of Intrinsic Thermo-Acoustic Ei.pdf:C\:\\Users\\niebl\\Zotero\\storage\\69BK6MT9\\Presentation - Convective Scaling of Intrinsic Thermo-Acoustic Ei.pdf:application/pdf}, } @article{JaensPolif17, title = {Uncertainty {Encountered} {When} {Modelling} {Self}-{Excited} {Thermoacoustic} {Oscillations} with {Artificial} {Neural} {Networks}}, volume = {9}, doi = {10.1177/1756827716687583}, number = {4}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Jaensch, Stefan and Polifke, Wolfgang}, year = {2017}, keywords = {archived, MediaTUM, PerRevJ}, pages = {367--379}, file = {Jaensch_Polifke_2017_Uncertainty Encountered When Modelling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\C7IQBIS4\\Jaensch_Polifke_2017_Uncertainty Encountered When Modelling.pdf:application/pdf}, } @inproceedings{JaensPolif16b, address = {Garching, Germany}, series = {{GTRE}-006}, title = {On the {Uncertainty} {Encountered} {When} {Modeling} {Self}-{Excited} {Thermoacoustic} {Oscillations} with {Artificial} {Neural} {Networks}}, booktitle = {Int. {Symp}. on {Thermoacoustic} {Instabilities} in {Gas} {Turbines} and {Rocket} {Engines}}, author = {Jaensch, Stefan and Polifke, Wolfgang}, month = jun, year = {2016}, keywords = {published, archived, PerRev}, file = {Jaensch and Polifke - 2016 - On the uncertainty encountered when modeling self-.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RCATK5DU\\Jaensch and Polifke - 2016 - On the uncertainty encountered when modeling self-.pdf:application/pdf}, } @inproceedings{MerkJaens16a, address = {Menaggio, Italy}, title = {Concurrent identification of flame dynamics and combustion noise for turbulent flames}, booktitle = {{CDCN2} - {Second} {Colloquium} on {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Merk, Malte and Jaensch, Stefan and Polifke, Wolfgang}, year = {2016}, keywords = {archived, MediaTUM}, file = {Merk et al. - 2016 - Concurrent identification of flame dynamics and co.pdf:C\:\\Users\\niebl\\Zotero\\storage\\N3SGHXHC\\Merk et al. - 2016 - Concurrent identification of flame dynamics and co.pdf:application/pdf;MerkJaens16a.pptx:C\:\\Users\\niebl\\Zotero\\storage\\E95WXQXG\\MerkJaens16a.pptx:application/vnd.openxmlformats-officedocument.presentationml.presentation}, } @inproceedings{MerkGaudr16, address = {Menaggio, Italy}, title = {Numerical and experimental investigation of the noise level in a confined premixed swirl-stabilized combustor}, booktitle = {{CDCN2} - {Second} {Colloquium} on {Combustion} {Dynamics} and {Combustion} {Noise}}, author = {Merk, Malte and Gaudron, Renaud and Mirat, Clément and Gatti, Marco and Schuller, Thierry and Polifke, Wolfgang}, year = {2016}, keywords = {archived, MediaTUM}, file = {Merk et al. - 2016 - Numerical and experimental investigation of the no.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3QNUAUSN\\Merk et al. - 2016 - Numerical and experimental investigation of the no.pdf:application/pdf;MerkGaudr16v2.pptx:C\:\\Users\\niebl\\Zotero\\storage\\ETECJ449\\MerkGaudr16v2.pptx:application/vnd.openxmlformats-officedocument.presentationml.presentation}, } @inproceedings{EvesqPolif02, address = {Amsterdam, The Netherlands}, title = {Low-{Order} {Acoustic} {Modelling} for {Annular} {Combustors}: {Validation} and {Inclusion} of {Modal} {Coupling}}, volume = {Volume 1: Turbo Expo 2002}, isbn = {978-0-7918-3606-4}, doi = {10.1115/GT2002-30064}, language = {en}, booktitle = {{ASME} {Turbo} {Expo} 2002: {Power} for {Land}, {Sea}, and {Air}}, publisher = {ASMEDC}, author = {Evesque, S. and Polifke, W.}, month = jun, year = {2002}, keywords = {Thermoacoustics, archived, Simulation + Modelling, Rev'd}, pages = {321--331}, file = {Evesque_Polifke_2002_Low order acoustic modelling for annular combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K3UFDQWZ\\Evesque_Polifke_2002_Low order acoustic modelling for annular combustors.pdf:application/pdf}, } @inproceedings{SilvaPolif14, address = {Stanford, USA}, title = {Towards concurrent identification of flame dynamics and combustion noise of enclosed flames}, url = {http://ctr.stanford.edu/Summer/SP14/06_Combustion/08_silva.pdf}, urldate = {2015-01-20}, booktitle = {Proceedings of the {Summer} {Program}}, publisher = {Center for Turbulence Research, Stanford University}, author = {Silva, C. F. and Polifke, W. and O’Brien, J. and Ihme, M.}, year = {2014}, keywords = {Combustion, Stability, Thermoacoustics, archived, Premixed flame, Frequency response}, pages = {179}, file = {Silva et al_2014_Towards concurrent identification of flame dynamics and combustion noise of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TVAUTCQQ\\Silva et al_2014_Towards concurrent identification of flame dynamics and combustion noise of.pdf:application/pdf}, } @article{SilvaMagri17, title = {Uncertainty quantification of growth rates of thermoacoustic instability by an adjoint {Helmholtz} solver}, volume = {139}, doi = {10.1115/1.4034203}, number = {1}, journal = {J. Eng. Gas Turbines and Power}, author = {Silva, Camilo F. and Magri, L. and Runte, T. and Polifke, W.}, year = {2017}, keywords = {archived, MediaTUM}, pages = {011901}, file = {Silva et al. - 2017 - Uncertainty quantification of growth rates of ther.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NGRQEEGJ\\Silva et al. - 2017 - Uncertainty quantification of growth rates of ther.pdf:application/pdf}, } @inproceedings{witte_identification_2016, address = {Krakow, Poland}, title = {Identification of the heat transfer frequency response in pulsating laminar and subcritical flow across a cylinder}, url = {http://www.eurotherm2016.agh.edu.pl/ocs/index.php/et2016/et2016/index}, abstract = {The steady-state heat transfer from a cylinder in cross-flow is a prototype problem in thermo-fluiddynamics. However, in many applications such as the Rijke tube, the flow may fluctuate. This work analyses the phenomenon combining numerical simulation with system identification. Direct numerical simulation of laminar flow and Large Eddy Simulation at subcritical flow at Reynolds number equal to 3900 are used, respectively. Fluctuations of the inlet velocity in the simulation are excited over a wide range of frequencies. Time series of unsteady heat release and velocity are post-processed to identify dynamic models, which may be represented as transfer functions. They accurately describe the dynamic behavior and can be used for further modelling.}, booktitle = {7th {European} {Thermal}-{Sciences} {Conference}}, author = {Witte, Armin and Cabrera, Ana and Polifke, Wolfgang}, year = {2016}, keywords = {archived, MediaTUM}, file = {presentation_Witte_EUROTHERM.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J2V8M2Q4\\presentation_Witte_EUROTHERM.pdf:application/pdf;Witte et al. - 2016 - Identification of the heat transfer frequency resp.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8ITHFAUV\\Witte et al. - 2016 - Identification of the heat transfer frequency resp.pdf:application/pdf}, } @article{witte_identification_2016-1, title = {Identification of the heat transfer frequency response in pulsating laminar and subcritical flow across a cylinder}, volume = {745}, issn = {1742-6588, 1742-6596}, url = {http://stacks.iop.org/1742-6596/745/i=3/a=032055?key=crossref.78f6e6aec4a6bf2398e85f9172ceb96c}, doi = {10.1088/1742-6596/745/3/032055}, abstract = {The steady-state heat transfer from a cylinder in cross-flow is a prototype problem in thermo-fluiddynamics. However, in many applications such as the Rijke tube, the flow may fluctuate. This work analyses the phenomenon combining numerical simulation with system identification. Direct numerical simulation of laminar flow and Large Eddy Simulation at subcritical flow at Reynolds number equal to 3900 are used, respectively. Fluctuations of the inlet velocity in the simulation are excited over a wide range of frequencies. Time series of unsteady heat release and velocity are post-processed to identify dynamic models, which may be represented as transfer functions. They accurately describe the dynamic behavior and can be used for further modelling.}, urldate = {2016-10-24}, journal = {J. of Physics: Conference Series}, author = {Witte, A and Cabrera, A and Polifke, W}, month = sep, year = {2016}, keywords = {++, published, archived, MediaTUM}, file = {Witte et al. - 2016 - Identification of the heat transfer frequency resp.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KARM75HF\\Witte et al. - 2016 - Identification of the heat transfer frequency resp.pdf:application/pdf}, } @article{AlbayPolif17a, title = {An analytical model based on the {G}-equation for the response of technically premixed flames to perturbations of equivalence ratio}, volume = {10}, doi = {10.1177/1756827717740776}, number = {2}, journal = {Int. J. Spray Comb. Dynamics}, author = {Albayrak, A. and Polifke, W.}, month = jun, year = {2018}, keywords = {MediaTUM*, archived}, pages = {103--110}, file = {Albayrak and Polifke - 2017 - An analytical model based on the G-equation for th.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7TIQEGKM\\Albayrak and Polifke - 2017 - An analytical model based on the G-equation for th.pdf:application/pdf}, } @article{JaensMerk18, title = {Identification of {Flame} {Transfer} {Functions} in the {Presence} of {Intrinsic} {Thermoacoustic} {Feedback} and {Noise}}, volume = {22}, issn = {1364-7830, 1741-3559}, url = {https://www.tandfonline.com/doi/full/10.1080/13647830.2018.1443517}, doi = {10.1080/13647830.2018.1443517}, language = {en}, number = {3}, journal = {Combustion Theory and Modelling}, author = {Jaensch, S. and Merk, M. and Emmert, T. and Polifke, W}, month = mar, year = {2018}, keywords = {MediaTUM*, archived}, pages = {613--634}, file = {Jaensch et al. - 2018 - Identification of flame transfer functions in the .pdf:C\:\\Users\\niebl\\Zotero\\storage\\H56PSDS2\\Jaensch et al. - 2018 - Identification of flame transfer functions in the .pdf:application/pdf}, } @inproceedings{MeindCruz18, address = {Vienna}, title = {Model order reduction in thermoacoustic stability analysis}, doi = {10.11128/arep.55.a55266}, booktitle = {{MATHMOD} 2018 {Extended} {Abstract} {Volume}, 9th {Vienna} {Conference} on {Mathematical} {Modelling}}, author = {Meindl, Max and Cruz Varona, Maria and Castagnotto, Alessandro and Thomann, Felix and Polifke, Wolfgang and Lohmann, Boris}, month = feb, year = {2018}, keywords = {MediaTUM*, archived}, file = {Meindl et al. - 2018 - Model order reduction in thermoacoustic stability .pdf:C\:\\Users\\niebl\\Zotero\\storage\\N5YYFB4B\\Meindl et al. - 2018 - Model order reduction in thermoacoustic stability .pdf:application/pdf}, } @article{MeindMerk18, title = {Determination of acoustic scattering matrices from linearized compressible flow equations}, volume = {27}, doi = {10.1142/S2591728518500275}, abstract = {The acoustic transmissions and reflections of plane waves at duct singularities can be represented with so-called scattering matrices. This paper shows how to extract scattering matrices utilizing linearized compressible flow equations and provides a comparative study of different governing equations, namely the Helmholtz, linearized Euler and linearized Navier–Stokes equations. A dis- continuous Galerkin finite element method together with a two-source forcing is employed. With this method, the scattering matrix for a radial swirler of a combustion test-rig is computed and vali- dated against the results of a fully compressible Large-Eddy-Simulation. Analogously, the scattering behavior of an axial swirler is investigated. The influence of acoustic-hydrodynamic interactions, viscous effects as well as unsteady boundary layers on the results is investigated for both configu- rations. A thermoacoustic stability analysis of the combustion test-rig housing the axial swirler is carried out, utilizing the scattering matrix of the s wirler. Major influence o f the reflections coming from the swirler on the thermoacoustic eigenfrequencies is found.}, number = {3}, journal = {Journal of Theoretical and Computational Acoustics}, author = {Meindl, Max and Merk, Malte and Fritz, Fabian and Polifke, Wolfgang}, month = jun, year = {2018}, keywords = {MediaTUM*, archived, ROMEO yellow}, pages = {1850027}, file = {Meindl et al. - 2018 - Determination of acoustic scattering matrices from.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ERSQTQ8T\\Meindl et al. - 2018 - Determination of acoustic scattering matrices from.pdf:application/pdf}, } @article{MerkJaens18, title = {Simultaneous {Identification} of {Transfer} {Functions} and {Combustion} {Noise} of a {Turbulent} {Flame}}, volume = {422}, issn = {0022460X}, doi = {10.1016/j.jsv.2018.02.040}, language = {en}, journal = {Journal of Sound Vibration}, author = {Merk, M. and Jaensch, S. and Silva, C. and Polifke, W.}, month = may, year = {2018}, keywords = {MediaTUM*, archived}, pages = {432--452}, file = {Merk et al. - 2018 - Simultaneous identification of transfer functions .pdf:C\:\\Users\\niebl\\Zotero\\storage\\ES99I343\\Merk et al. - 2018 - Simultaneous identification of transfer functions .pdf:application/pdf}, } @techreport{MerkPolif18, type = {Abschlussbericht}, title = {{NoiseDyn}: {Identifikation} des {Verbrennungslärms} und der {Dynamik} eingeschlossener turbulenter {Flammen}}, number = {DFG PO 710/16-1}, institution = {DFG}, author = {Merk, Malte and Polifke, Wolfgang}, month = jun, year = {2018}, keywords = {MediaTUM*, archived}, pages = {17}, file = {Merk and Polifke - 2018 - NoiseDyn Identifikation des Verbrennungsl ̈arms u.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3E8XKGLX\\Merk and Polifke - 2018 - NoiseDyn Identifikation des Verbrennungsl ̈arms u.pdf:application/pdf}, } @techreport{OberlAlbay18, address = {Bad Neuenahr}, type = {Abschlussbericht}, title = {Vorhersage von {Flammentransferfunktionen}: {Abschätzung} der {Flammentransferfunktion} aus stationären {Strömungsfeldern}}, language = {rum}, number = {1151}, institution = {FVV / Informationstagung Turbomaschinen, Frühjahr 2018}, author = {Oberleithner, K. and Albayrak, A.}, year = {2018}, keywords = {MediaTUM*, archived}, pages = {35 / insges. 102}, file = {Oberleithner_Albayrak_2018_Vorhersage von Flammentransferfunktionen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SKMASP8F\\Oberleithner_Albayrak_2018_Vorhersage von Flammentransferfunktionen.pdf:application/pdf}, } @inproceedings{SilvaYong18, address = {Lillestrom, Norway}, series = {{GT2018}-76921}, title = {Thermoacoustic {Modes} of {Quasi}-{1D} {Combustors} in the {Region} of {Marginal} {Stability}}, doi = {10.1115/GT2018-76921}, booktitle = {{ASME} {Turbo} {Expo} 2018: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Silva, C. and Yong, Kah J. and Magri, Luca}, year = {2018}, keywords = {MediaTUM*, archived}, file = {Presentation_ASME18.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZMVIDG9Q\\Presentation_ASME18.pdf:application/pdf;Silva et al_2018_Thermoacoustic Modes of Quasi- 1d.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XDCDUFTY\\Silva et al_2018_Thermoacoustic Modes of Quasi- 1d.pdf:application/pdf}, } @inproceedings{SilvaPette18, address = {Stanford, USA}, title = {Generalized chaos expansion of state space models for uncertainty quantification in thermoacoustics}, booktitle = {Proceedings of the {Summer} {Program}}, publisher = {Center for Turbulence Research, Stanford University}, author = {Silva, Camilo F. and Pettersson, Per and Gianluca Iaccarino and Ihme, Matthias}, year = {2018}, keywords = {MediaTUM*, archived, published online}, file = {Silva et al. - 2018 - Generalized chaos expansion of state space models .pdf:C\:\\Users\\niebl\\Zotero\\storage\\XY8YX2XQ\\Silva et al. - 2018 - Generalized chaos expansion of state space models .pdf:application/pdf}, } @phdthesis{witte_dynamics_2018, address = {München}, type = {Ph.{D}. {Thesis}}, title = {Dynamics of {Unsteady} {Heat} {Transfer} and {Skin} {Friction} in {Pulsating} {Flow} {Across} a {Cylinder}}, school = {TU München}, author = {Witte, Armin}, year = {2018}, keywords = {published, archived}, file = {Witte_2018_Dynamics of Unsteady Heat Transfer and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\83PSBQ25\\Witte_2018_Dynamics of Unsteady Heat Transfer and.pdf:application/pdf}, } @article{WittePolif18, title = {Modeling {Heat} {Transfer} and {Skin} {Friction} {Frequency} {Responses} of a {Cylinder} in {Cross} {Flow} - a {Unifying} {Perspective}}, volume = {40}, issn = {0145-7632 (print)}, doi = {10.1080/01457632.2018.1457241}, language = {eng.}, number = {13-14}, journal = {Heat Transfer Engineering}, author = {Witte, Armin and Polifke, Wolfgang}, year = {2018}, keywords = {MediaTUM*, archived}, pages = {1099--1110}, file = {Witte+Polif18.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ANV7JW6W\\Witte+Polif18.pdf:application/pdf}, } @article{AlbayJunip19, title = {Propagation speed of inertial waves in cylindrical swirling flows}, volume = {879}, doi = {10.1017/jfm.2019.641}, journal = {J. Fluid Mech.}, author = {Albayrak, A. and Juniper, M. P. and Polifke, W.}, month = nov, year = {2019}, keywords = {published, archived, MediaTUM}, pages = {85--120}, file = {Albayrak et al_2019_Propagation speed of inertial waves in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PMQSPUZD\\Albayrak et al_2019_Propagation speed of inertial waves in.pdf:application/pdf}, } @inproceedings{McCarHaeri19, address = {Pheonix, Arizona}, series = {{GT2019}-91319}, title = {Comparison of {Machine} {Learning} {Algorithms} in the {Interpolation} and {Extrapolation} of {Flame} {Describing} {Functions}}, doi = {10.1115/GT2019-91319}, abstract = {This report examines and compares commonly used Machine Learning algorithms in their performance in interpolation and extrapolation of FDFs, based on experimental and simulation data. Algorithm performance is evaluated by interpolating and extrapolating an experimentally determined FDF and then the best candidate algorithms are used to find limit cycle amplitudes calculated using the xFDF framework. The best algorithm in interpolation and extrapolation was found to be Gaussian Proccess Regression, when combined with a mean function based on an assumption of the data behaviour in the extrapolation regime. Its performance was closely followed by the widely used cubic spline method and a symbolic regression method. The Gaussian Proccess however, also gives an indication of distance into the extrapolation regime and can be used to carry out uncertainty quantification, in order to understand model sensitivities. This was demonstrated through application to the xFDF framework. The predictive performance and statistical information provided by the Gaussian Process make the best choice of the algorithms investigated here.}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2019: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {McCartney, Michael and Haeringer, Matthias and Polifke, Wolfgang}, year = {2019}, keywords = {archived, MediaTUM, published online}, pages = {10}, file = {McCartney et al_2019_Comparison of Machine Learning.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FA8M9YZF\\McCartney et al_2019_Comparison of Machine Learning.pdf:application/pdf}, } @article{MerkGaudr18b, title = {Direct {Assessment} of the {Acoustic} {Scattering} {Matrix} of a {Turbulent} {Swirl} {Combustor} by {Combining} {System} {Identification}, {Large} {Eddy} {Simulation} and {Analytical} {Approaches}}, volume = {141}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4040731}, language = {en}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Merk, Malte and Silva, Camilo F. and Polifke, Wolfgang and Gaudron, Renaud and Gatti, Marco and Mirat, Clément and Schuller, Thierry}, month = feb, year = {2019}, keywords = {MediaTUM*, archived}, pages = {021035}, file = {Accepted Version:C\:\\Users\\niebl\\Zotero\\storage\\5A3QKA94\\Merk et al. - 2019 - Direct Assessment of the Acoustic Scattering Matri.pdf:application/pdf;Accepted Version:C\:\\Users\\niebl\\Zotero\\storage\\7D8KVDKT\\Merk et al. - 2019 - Direct Assessment of the Acoustic Scattering Matri.pdf:application/pdf;Merk et al_2019_Direct Assessment of the Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J35NMFUX\\Merk et al_2019_Direct Assessment of the Acoustic.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\BX2DH56B\\Direct-Assessment-of-the-Acoustic-Scattering.html:text/html;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\6854JX3K\\Direct-Assessment-of-the-Acoustic-Scattering.html:text/html}, } @inproceedings{SchaePolif19, address = {Indianapolis, IN, USA}, title = {Low-order network modeling of a duct with non-uniform cross-section and arbitrary mean temperature gradient in the presence of mean flow}, isbn = {978-1-62410-590-6}, doi = {10.2514/6.2019-4376}, language = {en}, booktitle = {{AIAA} {Propulsion} and {Energy} 2019 {Forum}}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Schaefer, Felicitas and Polifke, Wolfgang}, month = aug, year = {2019}, keywords = {archived, MediaTUM}, file = {Schaefer_Polifke_2019_Low-order network modeling of a duct.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T2JIBVGE\\Schaefer_Polifke_2019_Low-order network modeling of a duct.pdf:application/pdf}, } @article{SilvaPolif19, title = {Non-dimensional groups for similarity analysis of thermoacoustic instabilities}, volume = {37}, issn = {15407489}, doi = {10.1016/j.proci.2018.06.144}, number = {4}, journal = {Proceedings of the Combustion Institute}, author = {Silva, Camilo F. and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM*, archived}, pages = {5289--5297}, file = {Silva+Polifke+2019.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JRUW269M\\Silva+Polifke+2019.pdf:application/pdf;SilvaPolif18.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M4RIIQIP\\SilvaPolif18.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\MV6Y2NHA\\S1540748918303274.html:text/html}, } @article{SteinAlbay19, title = {Consequences of {Flame} {Geometry} for the {Acoustic} {Response} of {Premixed} {Flames}}, volume = {199}, url = {https://www.sciencedirect.com/science/article/pii/S0010218018304735?dgcid=coauthor}, doi = {10.1016/j.combustflame.2018.10.039}, language = {en}, journal = {Combustion and Flame}, author = {Steinbacher, Thomas and Albayrak, Alp and Ghani, Abdulla and Polifke, Wolfgang}, month = jan, year = {2019}, keywords = {MediaTUM*, archived}, pages = {411--428}, file = {Steinbacher et al_2018_Consequences of Flame Geometry for the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AGJ34E7H\\Steinbacher et al_2018_Consequences of Flame Geometry for the.pdf:application/pdf}, } @article{SteinAlbay19a, title = {Response of {Premixed} {Flames} to {Irrotational} and {Vortical} {Velocity} {Fields} {Generated} by {Acoustic} {Perturbations}}, volume = {37}, doi = {10.1016/j.proci.2018.07.041}, number = {4}, journal = {Proceedings of the Combustion Institute}, author = {Steinbacher, Thomas and Albayrak, Alp and Ghani, Abdulla and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM*, archived}, pages = {5367--5375}, file = {Steinbacher et al_2019_Response of Premixed Flames to.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D7WCS5QV\\Steinbacher et al_2019_Response of Premixed Flames to.pdf:application/pdf}, } @inproceedings{yong_thermoacoustic_2019, address = {Phoenix, USA}, series = {{GT2019}-91784}, title = {Thermoacoustic spectrum of a swirled premixed combustor with partially reflecting boundaries}, booktitle = {{ASME} {Turbo} {Expo} 2019: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, publisher = {ASME}, author = {Yong, Kah Joon and Meindl, Max and Polifke, W. and Silva, C. F.}, year = {2019}, keywords = {archived, MediaTUM}, file = {Thermoacoustic_spectrum_of_a_swirled_premixed_combustor_with_partially_reflective_boundaries_FINAL1.pdf:C\:\\Users\\niebl\\Zotero\\storage\\C5MQ4L8U\\Thermoacoustic_spectrum_of_a_swirled_premixed_combustor_with_partially_reflective_boundaries_FINAL1.pdf:application/pdf}, } @inproceedings{GuoSilva20a, address = {Virtual, Online}, series = {{ASME} {GT2020}-14434}, title = {Reliable calculation of thermoacoustic instability risk using an imperfect surrogate model}, url = {youtu.be/KQJHNClTBYg}, booktitle = {{ASME} {Turbo} {Expo} 2020: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, year = {2020}, keywords = {archived, MediaTUM}, file = {Guo et al_2020_Reliable calculation of thermoacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SQI3EPFF\\Guo et al_2020_Reliable calculation of thermoacoustic.pdf:application/pdf}, } @article{GuoSilva20d, title = {Reliable {Calculation} of {Thermoacoustic} {Instability} {Risk} {Using} an {Imperfect} {Surrogate} {Model}}, volume = {Volume 143}, issn = {0742-4795}, url = {https://doi.org/10.1115/1.4049314}, doi = {10.1115/1.4049314}, abstract = {One of the fundamental tasks in performing robust thermoacoustic design of gas turbine combustors is calculating the modal instability risk, i.e., the probability that a thermoacoustic mode is unstable, given input uncertainties. To alleviate the high computational cost associated with conventional Monte Carlo simulation, surrogate modeling techniques are usually employed. Unfortunately, in practice, it is not uncommon that only a small number of training samples can be afforded for surrogate model training. As a result, epistemic uncertainty may be introduced by such an "inaccurate" model, provoking a variation of modal instability risk calculation. In the current study, using Gaussian Process (GP) as the surrogate model, we address the following two questions: Firstly, how to quantify the variation of modal instability risk induced by the epistemic surrogate model uncertainty? Secondly, how to reduce the variation of risk calculation given a limited computational budget for the surrogate model training? For the first question, we leverage on the Bayesian characteristic of the GP model and perform correlated sampling of the GP predictions at different inputs to quantify the uncertainty of risk calculation. We show how this uncertainty shrinks when more training samples are available. For the second question, we adopt an active learning strategy to intelligently allocate training samples, such that the trained GP model is highly accurate particularly in the vicinity of the stability margin. As a result, a more accurate and robust modal instability risk calculation is obtained without increasing the computational cost of surrogate model training.}, number = {Issue 1}, urldate = {2020-12-14}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, month = dec, year = {2020}, keywords = {published, archived, MediaTUM}, pages = {011010 (9 pages)}, file = {Guo et al. - 2020 - Reliable Calculation of Thermoacoustic Instability.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DG75UDM7\\Guo et al. - 2020 - Reliable Calculation of Thermoacoustic Instability.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\NMLQQDHV\\Reliable-Calculation-of-Thermoacoustic-Instability.html:text/html}, } @article{MeindAlbay20, title = {A state-space formulation of a discontinuous {Galerkin} method for thermoacoustic stability analysis}, volume = {481}, issn = {0022460X}, doi = {10.1016/j.jsv.2020.115431}, language = {en}, journal = {Journal of Sound and Vibration}, author = {Meindl, Max and Albayrak, Alp and Polifke, Wolfgang}, month = sep, year = {2020}, keywords = {archived, MediaTUM}, pages = {115431}, file = {Meindl et al_2020_A state-space formulation of a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R337H2GW\\Meindl et al_2020_A state-space formulation of a.pdf:application/pdf}, } @inproceedings{SilvaPriet20, address = {Virtual, Online}, title = {Adjoint-based calculation of parametric thermoacoustic maps of an industrial combustion chamber}, url = {youtu.be/lEUvgyig7mU}, booktitle = {{ASME} {Turbo} {Expo} 2020: {Turbomachinery} {Technical} {Conference} and {Exposition}}, author = {Silva, C. F. and Prieto, L. and Ancharek, M. and Marigliani, P. and Mensah, G. A. and Mensah, G. A.}, year = {2020}, keywords = {archived, MediaTUM}, file = {SilvaPrieto2020_VF.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QLLLDTKB\\SilvaPrieto2020_VF.pdf:application/pdf}, } @inproceedings{KulkaSilva21, address = {Virtual, Online}, title = {Response of {Spray} {Number} {Density} and {Evaporation} {Rate} to {Velocity} {Oscillations}}, author = {Kulkarni, Sagar and Silva, Camilo F. and Polifke, Wolfgang}, year = {2021}, keywords = {Submitted}, file = {Kulkarni et al. - 2021 - Response of Spray Number Density and Evaporation R.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YERVJ4M9\\Kulkarni et al. - 2021 - Response of Spray Number Density and Evaporation R.pdf:application/pdf}, } @phdthesis{Doehn19, type = {Bachelor {Thesis}}, title = {Hybrid neural networks/low-order-model approach for the characterization of the nonlinear flame response}, school = {TU München}, author = {Doehner, Gregor}, year = {2019}, note = {Betreuer:Silva}, file = {Doehner - 2019 - Hybrid neural networkslow-order-model approach fo.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KS8U77ND\\Doehner - 2019 - Hybrid neural networkslow-order-model approach fo.pdf:application/pdf}, } @inproceedings{HeinzBrand05a, address = {Louvain-la-Neuve, Belgium}, title = {Optimization of rate coefficients for global reaction mechanisms using a nested genetic algorithm}, booktitle = {European {Combustion} {Meeting} {ECM} 2005}, publisher = {Combustion Institute}, author = {Heinz, C. and Brandt, M. and Polifke, W.}, month = apr, year = {2005}, note = {tex.ids= HeinzBrand05b}, keywords = {Combustion, Optimization}, file = {Heinz et al_2005_Optimization of Rate Coefficients for Global Reaction Mechanisms using a Nested.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K328E53U\\Heinz et al_2005_Optimization of Rate Coefficients for Global Reaction Mechanisms using a Nested.pdf:application/pdf;Heinz et al. - Optimization of Rate Coefficients for Global React.pdf:C\:\\Users\\niebl\\Zotero\\storage\\97MF4PSK\\Heinz et al. - Optimization of Rate Coefficients for Global React.pdf:application/pdf}, } @article{BurenPolif21a, title = {Enhanced {Longitudinal} {Heat} {Transfer} in {Oscillatory} {Channel} {Flow} - {A} {Theoretical} {Perspective}}, volume = {143}, issn = {0098-2202, 1528-901X}, url = {https://asmedigitalcollection.asme.org/fluidsengineering/article/doi/10.1115/1.4052067/1115623/Enhanced-Longitudinal-Heat-Transfer-in-Oscillatory}, doi = {10.1115/1.4052067}, abstract = {Abstract Enhanced longitudinal heat transfer in viscous, laminar, single-phase, oscillatory channel flow is investigated in the present paper. Kurzweg (J. Heat Transf. 107, 1985) analysed this case theoretically and derived a correlation for a non-dimensionalized effective thermal conductivity in terms of Prandtl and Womersley numbers. The present investigation contributes analysis of limiting cases and physical interpretation to the results of Kurzweg. A simplified model with isothermal walls is proposed, applicable if working fluid and channel wall material exhibit sufficiently large differences in thermal inertia. Examined over a wide range of Womersley numbers, this model reveals six distinct regimes characterized by the Prandtl number of the fluid. The respective thickness of hydrodynamic and thermal boundary layers relative to the channel width is relevant in this context. Maximum effective thermal conductivity is attained when the thermal boundary layer expands over the full channel width. The influence of Womersley number is discussed and explained in terms of the interplay of hydrodynamic and thermal flow characteristics. These patterns reveal either quasi-steady parabolic or oscillating bulk characteristics. The importance of the thermal boundary layer thickness motivates the introduction of a new non-dimensional group, making it easier to classify the various regimes of enhanced longitudinal heat transfer.}, language = {en}, number = {12}, urldate = {2021-08-16}, journal = {Journal of Fluids Engineering}, author = {Buren, Simon H. van and Polifke, Wolfgang}, month = aug, year = {2021}, note = {tex.ids= BurenPolif21a}, keywords = {MediaTUM}, file = {Buren_Polifke_2021_Enhanced Longitudinal Heat Transfer in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5T49ELIM\\Buren_Polifke_2021_Enhanced Longitudinal Heat Transfer in.pdf:application/pdf}, } @article{FournMeind21a, title = {Low-{Order} {Modeling} of {Can}-{Annular} {Combustors}}, volume = {143}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4051954}, language = {en}, number = {12}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Fournier, Guillaume J. J. and Meindl, Max and Silva, Camilo F. and Ghirardo, Giulio and Bothien, Mirko R. and Polifke, Wolfgang}, month = dec, year = {2021}, keywords = {MediaTUM}, pages = {121004}, file = {Fournier et al. - 2021 - Low-Order Modeling of Can-Annular Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\XEAY9KEM\\Fournier et al. - 2021 - Low-Order Modeling of Can-Annular Combustors.pdf:application/pdf}, } @article{doan_autoencoded_2021, title = {Autoencoded {Reservoir} {Computing} {Approach} for {Turbulence} {Learning}}, journal = {Lecture Notes in Computer Science - ICCS 2021}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, year = {2021}, keywords = {MediaTUM}, annote = {-Comments for the authors - This work addresses the modeling of two-dimensional turbulent flows using machine learning methods.The main idea is to combine an autoencoder for dimension reduction with a Echo State Network. The motivation for this architectural choice is very well motivated, and relevant related work is discussed.The paper spends some time to clearly describe the setting of the model and its training, which is very appreciated as it encourages reproducibility and further advancements. The numerical results are clearly introduced and discussed and confirm the performances of the method.----------------------- REVIEW 2 ---------------------The novelty here appears to be combining the Autoencoder (Dimensionality reduction) with the Echo State Network (Prediction) as well as the multi-stage training method. Non-intrusive Reduced Order Modelling (NIROM) is an area that does the same and may provide a more complete introduction and literature review.The sentence:  ’Because the error is small (less than 6\% and 4\% of error, normalized using the maximum value, on average for u and v respectively)’ is a little bit confusing and it is not obvious where these numbers have come from.It might be interesting for future work to compare this to other forms of dimensionality reduction and/or non-intrusive prediction methods as I can't currently tell how this performs compared to other methods for this problem.----------------------- REVIEW 3 --------------------- This paper presents an AE-RC approach to learn dynamical systems in the reduced space with experiments using 2D turbulent flow. I found the article well motivated, the proposed approach novel and the addressed problem very interesting. This is a well written paper with a clear description of the research contribution. This work can be of value for physics-based machine learning with model reduction. Here are some comments/questions.It can be beneficial for readers to see a comparison of the proposed approach with a linear compression method (e.g POD). The CFD model presented in this work is chaotic and highly non-linear. Thus we can expect the auto-encoder approach to exhibit a significant advantage compared to linear model reductions? The dropout rate (0.001) in this work is small, compared to regular settings. The authors explain that this parameter is chosen according to experiments. In this case,  do the dropout layers impact significantly the output. Can we compare the results with and without the dropout layers?The reduced model in the CFD example is of dimension Nc = 192, compared to the original data of dimension 1152. The ratio is above 15\%, which might not be sufficient for high-dimensional problems. It will be beneficial for readers to see how the compression ratio impacts the model accuracy. It will also be interesting to see a comparison of echo state network and LSTM, which is widely used for time series. The authors mentioned that LSTM works better in problems of smaller size (I suppose you may need more data to train a LSTM as well?). One possiblity is to compare the prediction accuracy and the training time required of both methods with different size of training data.Fig 3. The authors may consider plotting the difference between AE-RC and the actual evolutionFig 4. It is interesting to see the AE-RC prediction (dashed red curve) exhibits some delay compared to the actual evolution. Is it possible to add some further comments on that?}, file = {Doan et al_2021_Autoencoded Reservoir Computing.pdf:C\:\\Users\\niebl\\Zotero\\storage\\LN4VFB22\\Doan et al_2021_Autoencoded Reservoir Computing.pdf:application/pdf}, } @inproceedings{GuoSilva20c, address = {Paris, France}, title = {Enhanced {Gaussian} {Process} approach for efficient thermoacoustic uncertainty quantification: {A} comparison study}, author = {Guo, Shuai and Silva, Camilo F. and Yong, Kah J. and Polifke, Wolfgang}, month = jan, year = {2021}, keywords = {MediaTUM}, file = {GuoSilva20c_WCCM.pptx:C\:\\Users\\niebl\\Zotero\\storage\\BUIXM9MC\\GuoSilva20c_WCCM.pptx:application/vnd.openxmlformats-officedocument.presentationml.presentation;wccm2020-abstract.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4FAJ8HGE\\wccm2020-abstract.pdf:application/pdf}, } @misc{vinuesa_potential_2021, title = {The potential of machine learning to enhance computational fluid dynamics}, author = {Vinuesa, Ricardo and Brunton, Steven L.}, year = {2021}, note = {arXiv: 2110.02085 [physics.flu-dyn]}, file = {Vinuesa_Brunton_2021_The potential of machine learning to.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BRS7IKQQ\\Vinuesa_Brunton_2021_The potential of machine learning to.pdf:application/pdf}, } @article{leer_fast_2021, title = {Fast {Flow} {Field} {Estimation} for {Various} {Applications} with {A} {Universally} {Applicable} {Machine} {Learning} {Concept}}, volume = {107}, issn = {1386-6184, 1573-1987}, url = {https://link.springer.com/10.1007/s10494-020-00234-x}, doi = {10.1007/s10494-020-00234-x}, abstract = {Abstract This paper presents an approach for the prediction of incompressible laminar steady flow fields over various geometry types. In conventional approaches of computational fluid dynamics (CFD), flow fields are obtained by solving model equations on computational grids, which is in general computationally expensive. Based on the ability of neural networks to intuitively identify and approximate nonlinear physical relationships, the proposed method makes it possible to eliminate the explicit implementation of model equations such as the Navier–Stokes equations. Moreover, it operates without iteration or spatial discretization of the flow problem. The method is based on the combination of a minimalistic multilayer perceptron (MLP) architecture and a radial-logarithmic filter mask (RLF). The RLF acts as a preprocessing step and its purpose is the spatial encoding of the flow guiding geometry into a compressed form, that can be effectively interpreted by the MLP. The concept is applied on internal flows as well as on external flows (e.g. airfoils and car shapes). In the first step, datasets of flow fields are generated using a CFD-code. Subsequently the neural networks are trained on defined portions of these datasets. Finally, the trained neural networks are applied on the remaining unknown geometries and the prediction accuracy is evaluated. Dataset generation, neural network implementation and evaluation are carried out in MATLAB. To ensure reproducibility of the results presented here, the trained neural networks and sample applications are made available for free download and testing.}, language = {en}, number = {1}, urldate = {2021-10-05}, journal = {Flow, Turbulence and Combustion}, author = {Leer, Michael and Kempf, Andreas}, month = jun, year = {2021}, note = {tex.ids= LeerKempf20}, pages = {175--200}, file = {Leer_Kempf_2021_Fast Flow Field Estimation for Various.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TVNCWYKF\\Leer_Kempf_2021_Fast Flow Field Estimation for Various.pdf:application/pdf}, } @incollection{BurenPolif18, title = {Enhanced {Heat} {Transfer} in {Turbulent} {Channel} {Flow} {Exposed} to {High} {Amplitude} {Pulsations}}, booktitle = {Annual {Report}}, publisher = {Sonderforschungsbereich/Transregio 40}, author = {Buren, S. van and Polifke, W.}, editor = {Stemmer, C. and Adams, N. A. and Haidn, O. J. and Radespiel, R. and Sattelmayer, T and Schröder, W. and Weigand, B. and Weigand, B.}, month = oct, year = {2018}, keywords = {published, archived, MediaTUM}, pages = {39--56}, file = {van Buren and Polifke - 2018 - Enhanced Heat Transfer in Turbulent Channel Flow E.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EWEV5MKU\\van Buren and Polifke - 2018 - Enhanced Heat Transfer in Turbulent Channel Flow E.pdf:application/pdf}, } @inproceedings{BurenPolif20, address = {Online}, title = {Enhanced {Longitudinal} {Heat} {Transfer} in {Oscillatory} {Channel} {Flow} - a {Theoretical} {Perspective}}, booktitle = {{ISROMAC} 2020 - {Int}. {Symposium} on {Transport} {Phenomena} and {Dynamics} of {Rotating} {Machinery}}, author = {Buren, S. van and Polifke, W.}, month = nov, year = {2020}, note = {Note: paper published in special issue of ASME JFE}, keywords = {accepted}, } @article{HaeriMerk18, title = {Inclusion of higher {Harmonics} in the {Flame} {Describing} {Function} for {Predicting} {Limit} {Cycles} of self-excited {Combustion} {Instabilitites}}, volume = {37}, url = {https://doi.org/10.1016/j.proci.2018.06.150}, doi = {10.1016/j.proci.2018.06.150}, abstract = {The Flame Describing Function (FDF) is widely used to model non-linear thermo-acoustic phenomena, e.g. limit cycle (LC) oscillations in a combustor. The FDF accounts for the amplitude dependence of the flame response but besides that relies on linear assumptions. Hence, it neglects the excitation of higher harmonics, which is a typical non- linear feature that may play a major role in certain thermo-acoustic systems. Consequently, using the FDF in such cases provides inaccurate or incomplete results. As all existing flame models that account for the generation of higher harmonics are generally very costly to determine, we propose a computationally cheap way to extend the standard FDF in order to include higher harmonics of the flame response. This extended FDF includes additional transfer functions relating higher harmonics of the heat release rate to the forcing velocity. Besides taking into account higher harmonics, the extended FDF relies on the same quasi-linear assumptions and requires the same effort for determination as the standard FDF. This paper shows how to determine the proposed extended FDF and how to employ it for the prediction of LC oscillations. In the second part of this paper the proposed concept is applied to predict and analyse the LC of a laminar premixed burner where, because higher harmonics play a major role, the standard FDF delivers inaccurate results. Results obtained by using the extended FDF show good agreement with fully compressible numerical simulation of the same configuration. Thus, the extended FDF proves its ability to provide accurate predictions in situations where higher harmonics play an important role in thermo-acoustic LCs.}, number = {4}, journal = {Proceedings of the Combustion Institute}, author = {Haeringer, Matthias and Merk, Malte and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM*, archived, published online}, pages = {5255--5262}, file = {Häringer et al_2018_Inclusion of higher Harmonics in the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\EFWZQ3MX\\Häringer et al_2018_Inclusion of higher Harmonics in the.pdf:application/pdf}, } @article{PurwaMeind21a, series = {{GTP}-21-1331}, title = {Comparison of model order reduction methods in thermoacoustic stability analysis}, volume = {144}, doi = {10.1115/1.4052096}, abstract = {Thermoacoustic instabilities are a major challenge in the development of modern low-emission gas turbines. Thermoacoustic stability analysis is a crucial step in the design phase of these turbines. Uncertainty quantification and parametric studies for this analysis require repeated computations of models with large degrees of freedom, which can be prohibitively expensive. Model order reduction (MOR) plays a pivotal role in reducing this computational cost by finding a reduced order model (ROM) with significantly less degrees of freedom than the full order model (FOM), but featuring approximately the same dynamics. In this proof-of-concept study, the acoustic wave propagation is modeled by a 1D network approach, while the flow-flame interaction is accounted for by a Flame Transfer Function (FTF). We employ MOR to the acoustic subsystem, which usually contributes most to the degrees of freedom to the overall setup, and couple it to the FTF after the reduction. Projective MOR techniques employ projection of the FOM onto an appropriate subspace to obtain the ROM. It is the choice of this subspace that differentiates the various techniques. This study demonstrates the application of three reduction techniques to the acoustic subsystem - modal reduction, truncated balanced realization (TBR) and iterative rational Krylov algorithm (IRKA). Modal reduction, a commonly used MOR method in thermoacoustics, is based on building a modal basis using the eigenmodes of the full order acoustic model. Instead of preserving the eigenmodes, TBR and IRKA are based on preserving the transfer behavior of the FOM. TBR uses balancing of controllability and observability Grammians of the full system to obtain the ROM, whereas, IRKA iteratively finds the expansion points to optimally match moments of the transfer function of the full system. The modes computed from reduced systems coupled to the FTF are compared with the modes from the coupled FOM system to assess the suitability of the reduction techniques. Results show that although the reduced system from the modal reduction method correctly captures the thermoacoustic cavity modes, it fails to capture the intrinsic thermoacoustic mode, which is a marginally stable mode for the FOM coupled system. On the contrary, ROMs from TBR and IRKA methods accurately predict both cavity and intrinsic thermoacoustic modes. Thus, model order reduction methods based on transfer behavior of the system are more suitable than the methods based on the eigenmodes for thermoacoustic stability analysis.}, number = {2}, journal = {J. Eng. Gas Turbines and Power}, author = {Purwar, Naman and Meindl, Maximilian and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {021004--1--9}, file = {Purwar et al_2022_Comparison of model order reduction.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JRN3WMPX\\Purwar et al_2022_Comparison of model order reduction.pdf:application/pdf}, } @phdthesis{Stein19, address = {München}, type = {{PhD} {Thesis}}, title = {Analysis and {Low}-{Order} {Modeling} of {Interactions} between {Acoustics}, {Hydrodynamics} and {Premixed} {Flames}}, url = {http://mediatum.ub.tum.de/?id=1484812}, language = {English}, school = {TU München}, author = {Steinbacher, Thomas}, year = {2019}, keywords = {published, archived}, file = {Steinbacher - Analysis and Low-Order Modeling of Interactions be.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HCSNUDZF\\Steinbacher - Analysis and Low-Order Modeling of Interactions be.pdf:application/pdf}, } @inproceedings{KaessPolif08, address = {Stanford, USA}, title = {{CFD}-{Based} {Mapping} of the {Thermo}-{Acoustic} {Stability} of a {Laminar} {Premix} {Burner}}, url = {https://web.stanford.edu/group/ctr/Summer/SP08/4_6_Kaess.pdf}, booktitle = {Proceedings of the 2008 {Summer} {Program}}, publisher = {Stanford Univ., Center for Turbulence Research}, author = {Kaess, R. and Polifke, W. and Poinsot, T. and Noiray, N. and Durox, D. and Schuller, T. and Candel, S.}, year = {2008}, note = {tex.owner= Polifke}, keywords = {Combustion, Stability, Thermoacoustics, Premixed flame, Frequency response}, pages = {289--302}, annote = {Anmerkungen herauskopieren (Fr 22 Nov 2013 17:59:05 CET) Geometry noiray burner (note on p.290)   FTF Fitting model (note on p.293)  }, file = {Kaess et al_2008_CFD-Based Mapping of the Thermo-Acoustic Stability of a Laminar Premix Burner.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TJMD2DB4\\Kaess et al_2008_CFD-Based Mapping of the Thermo-Acoustic Stability of a Laminar Premix Burner.pdf:application/pdf}, } @inproceedings{gopinathan_effect_2021, address = {Munich, Germany}, title = {Effect of equivalence ratio on stability and flashback of combustion systems using hydrogen-blended fuels}, abstract = {The combustion of hydrogen and hydrogen-blended fuels has become a hot research topic in recent years, due to the reduced carbon emissions and potential for clean combustion. However, hydrogen has a considerably higher flame speed than conventional hydrocarbon fuels, and this has a major effect on the dynamics of premixed flames, resulting in an increased susceptibility to thermoacoustic instabilities and a risk of flame flashback. It is a challenging task to ensure safe operation of combustion units when using hydrogen or hydrogen-blends as fuel. In the present work, we aim to identify the safe operability limits of hydrogen-blended natural gas for different equivalence ratios. We assume a hydrogen concentration of 20\%, but also look briefly at higher concentrations. We consider a generic combustion chamber, consisting of a quarter wave resonator with a perforated plate, which holds an array of small conical flames. We describe the combustion chamber in terms of the tailored Green’s function (impulse response). The flame movement is governed by the G-equation (a nonlinear PDE based a level-set approach); we solve the G-equation numerically to get the shape of the flame surface (and its evolution with time), and from that we calculate the flame describing function (FDF). The FDF and tailored Green’s function are combined to give an integral equation for the acoustic velocity in this thermoacoustic system, and from this integral equation we extract numerical results for the complex eigenfrequencies. The safe operability limits are then presented in a 3-D parameter space, involving \${\textbackslash}epsilon\$ (amplitude of velocity fluctuations), \${\textbackslash}phi\$ (equivalence ratio), and \$x\_\{H\_2\}\$ (hydrogen concentration).}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}: {Industry} meets {Academia} ({SoTiC} 2021)}, author = {Gopinathan, Sreenath M. and Surendran, Aswathy and Heckl, Maria A.}, year = {2021}, keywords = {work-in-progress}, file = {Gopinathan et al. - 2021 - Effect of equivalence ratio on stability and flash.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WR5HPDS7\\Gopinathan et al. - 2021 - Effect of equivalence ratio on stability and flash.pdf:application/pdf}, } @inproceedings{SchaeMagri21, series = {{GT2021}-59866}, title = {A {Hybrid} {Adjoint} {Network} {Model} for {Thermoacoustic} {Optimization}}, booktitle = {{ASME} {Turbo} {Expo} 2021: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Schaefer, Felicitas and Magri, Luca and Polifke, Wolfgang}, year = {2021}, keywords = {archived, MediaTUM}, file = {Schaefer et al. - 2021 - A Hybrid Adjoint Network Model for Thermoacoustic .pdf:C\:\\Users\\niebl\\Zotero\\storage\\AJEXSP9P\\Schaefer et al. - 2021 - A Hybrid Adjoint Network Model for Thermoacoustic .pdf:application/pdf}, } @inproceedings{mccartney_reducing_2021, address = {Online}, series = {{GT2021}-60283}, title = {Reducing {Uncertainty} in the {Onset} of {Combustion} {Instabilities} using {Dynamic} {Pressure} {Information} and {Bayesian} {Neural} {Networks}}, doi = {10.1115/GT2021-60283}, abstract = {Many combustion systems become thermoacoustically unstable around certain operating conditions. The exact onset condition is uncertain because of stochasticity, such as turbulent combustion, and the influence of hidden variables, such as un-measured wall temperatures or differences in geometry within manufacturing tolerances. Practical systems tend to be more elaborate than laboratory systems and tend to have less instrumentation, meaning that they suffer more from uncertainty induced by hidden variables. In many commercial systems, the only direct measurement of the combustor comes from a dynamic pressure sensor. In this study we train a Bayesian Neural Network (BNN) to predict the probability of onset of thermoacoustic instability at various times in the future, using only dynamic pressure measurements and the current operating condition. We show that, on a practical system, the error in the onset time predicted by the BNNs is less than half of the error when using the operating condition alone and more informative than the warning provided by commonly used precursor detection methods. This is demonstrated on two systems: (i) a premixed hydrogen/methane annular combustor, where the hidden variables are wall temperatures that depend on the rate of change of operating condition, and (ii) full scale gas turbines, where the hidden variables arise from differences between the engines.}, booktitle = {{ASME} {Turbo} {Expo} 2021: {Turbomachinery} {Technical} {Conference} \& {Exposition}}, publisher = {ASME}, author = {McCartney, Michael and Sengupta, Ushnish and Juniper, Matthew}, year = {2021}, note = {McCarSengu21}, keywords = {published}, file = {McCartney et al_2021_Reducing Uncertainty in the Onset of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5E83H9LF\\McCartney et al_2021_Reducing Uncertainty in the Onset of.pdf:application/pdf}, } @inproceedings{Tay-WKomar10, address = {Glasgow, UK}, title = {Identification of {Flame} {Transfer} {Functions} from {LES} of a {Premixed} {Swirl} {Burner}}, volume = {Volume 2: Combustion, Fuels and Emissions, Parts A and B}, isbn = {978-0-7918-4397-0}, doi = {10.1115/GT2010-22769}, booktitle = {{ASME} {Turbo} {Expo} 2010: {Power} for {Land}, {Sea}, and {Air}}, publisher = {ASME}, author = {Tay-Wo-Chong, Luis and Komarek, T. and Kaess, R. and Föller, S. and Polifke, W.}, year = {2010}, note = {tex.ids= TayWKomar10}, pages = {623--635}, annote = {(non-)adiabatic wall boundary conditions, 30 kw and 50 kw cases}, file = {Tay Wo Chong et al. - 2010 - Identification of Flame Transfer Functions From LE.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UBECHISV\\Tay Wo Chong et al. - 2010 - Identification of Flame Transfer Functions From LE.pdf:application/pdf;Tay-Wo-Chong et al_2010_Identification of Flame Transfer Functions from LES of a Premixed Swirl Burner.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AUKWE6Z9\\Tay-Wo-Chong et al_2010_Identification of Flame Transfer Functions from LES of a Premixed Swirl Burner.pdf:application/pdf}, } @article{schily_low-order_2021, title = {Low-{Order} {Model} of the {Dynamics} and {Start}-up of a {Pulsating} {Heat} {Pipe}}, volume = {17}, issn = {2151-8629}, url = {http://www.thermalfluidscentral.org/journals/index.php/Heat_Mass_Transfer/article/view/1229}, doi = {10.5098/hmt.17.16}, abstract = {A simple open-loop pulsating heat pipe model is proposed, which allows to analytically determine the start-up behavior by a linear stability analysis. Two distinct types of instability can occur in such a pulsating heat pipe: oscillatory and non-oscillatory. This paper demonstrates that for bubbles consisting of non-condensible gas, large temperature gradients along the wall are required to achieve start-up, whereas start-up is fairly easy to achieve when there is only a single working medium that forms bubbles from its vapor. The study also finds that surface tension as such only influences start-up indirectly, while contact angle hysteresis dampens out any instabilities.}, language = {en}, number = {16}, journal = {Frontiers in Heat and Mass Transfer}, author = {Schily, Felix and Polifke, Wolfgang}, year = {2021}, pages = {15}, file = {Schily und Polifke - 2021 - LOW-ORDER MODEL OF THE DYNAMICS AND START-UP OF A .pdf:C\:\\Users\\niebl\\Zotero\\storage\\I5M3L576\\Schily und Polifke - 2021 - LOW-ORDER MODEL OF THE DYNAMICS AND START-UP OF A .pdf:application/pdf}, } @article{tathawadekar_hybrid_2021, title = {Hybrid {Neural} {Network} {PDE} {Solvers} for {Reacting} {Flows}}, url = {https://arxiv.org/pdf/2111.11185.pdf}, journal = {ArXiv}, author = {Tathawadekar, N. and Doan, A. K. and Silva, C. F. and Thuerey, N.}, year = {2021}, keywords = {MediaTUM}, file = {Tathawadekar et al. - Hybrid Neural Network PDE Solvers for Reacting Flo.pdf:C\:\\Users\\niebl\\Zotero\\storage\\585Q6NUB\\Tathawadekar et al. - Hybrid Neural Network PDE Solvers for Reacting Flo.pdf:application/pdf}, } @article{obayashi_feature_2021, title = {Feature extraction of fields of fluid dynamics data using sparse convolutional autoencoder}, volume = {11}, issn = {2158-3226}, url = {https://aip.scitation.org/doi/10.1063/5.0065637}, doi = {10.1063/5.0065637}, language = {en}, number = {10}, urldate = {2022-02-01}, journal = {AIP Advances}, author = {Obayashi, Wataru and Aono, Hikaru and Tatsukawa, Tomoaki and Fujii, Kozo}, month = oct, year = {2021}, pages = {105211}, file = {Full Text:C\:\\Users\\niebl\\Zotero\\storage\\7MJNWHBR\\Obayashi et al. - 2021 - Feature extraction of fields of fluid dynamics dat.pdf:application/pdf}, } @article{omata_novel_2019, title = {A novel method of low-dimensional representation for temporal behavior of flow fields using deep autoencoder}, volume = {9}, issn = {2158-3226}, url = {http://aip.scitation.org/doi/10.1063/1.5067313}, doi = {10.1063/1.5067313}, language = {en}, number = {1}, urldate = {2022-02-01}, journal = {AIP Advances}, author = {Omata, Noriyasu and Shirayama, Susumu}, month = jan, year = {2019}, pages = {015006}, file = {Full Text:C\:\\Users\\niebl\\Zotero\\storage\\J23EWUK2\\Omata and Shirayama - 2019 - A novel method of low-dimensional representation f.pdf:application/pdf}, } @article{gangopadhyay_3d_2021, title = {{3D} convolutional selective autoencoder for instability detection in combustion systems}, author = {Gangopadhyay, Tryambak and Ramanan, Vikram and Akintayo, Adedotun and Boor, Paige K and Sarkar, Soumalya and Chakravarthy, Satyanarayanan R and Sarkar, Soumik}, year = {2021}, note = {arXiv: 2101.01877 [cs.LG]}, keywords = {precursor, Autoencoder, Neural network}, file = {Gangopadhyay et al_2021_3D convolutional selective autoencoder.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YGXDCTZV\\Gangopadhyay et al_2021_3D convolutional selective autoencoder.pdf:application/pdf}, } @article{gruber_comparison_2021, title = {A {Comparison} of {Neural} {Network} {Architectures} for {Data}-{Driven} {Reduced}-{Order} {Modeling}}, url = {http://arxiv.org/abs/2110.03442}, abstract = {The popularity of deep convolutional autoencoders (CAEs) has engendered effective reduced-order models (ROMs) for the simulation of large-scale dynamical systems. However, it is not known whether deep CAEs provide superior performance in all ROM scenarios. To elucidate this, the effect of autoencoder architecture on its associated ROM is studied through the comparison of deep CAEs against two alternatives: a simple fully connected autoencoder, and a novel graph convolutional autoencoder. Through benchmark experiments, it is shown that the superior autoencoder architecture for a given ROM application is highly dependent on the size of the latent space and the structure of the snapshot data, with the proposed architecture demonstrating benefits on data with irregular connectivity when the latent space is sufficiently large.}, urldate = {2022-01-28}, journal = {arXiv:2110.03442 [cs, math]}, author = {Gruber, Anthony and Gunzburger, Max and Ju, Lili and Wang, Zhu}, month = oct, year = {2021}, note = {arXiv: 2110.03442}, keywords = {machine learning, Mathematics - Numerical Analysis}, file = {arXiv Fulltext PDF:C\:\\Users\\niebl\\Zotero\\storage\\QTJ6WTDE\\Gruber et al. - 2021 - A Comparison of Neural Network Architectures for D.pdf:application/pdf;arXiv.org Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\3MTCICHE\\2110.html:text/html}, } @article{simpson_machine_2021, title = {Machine {Learning} {Approach} to {Model} {Order} {Reduction} of {Nonlinear} {Systems} via {Autoencoder} and {LSTM} {Networks}}, volume = {147}, issn = {0733-9399, 1943-7889}, url = {http://ascelibrary.org/doi/10.1061/%28ASCE%29EM.1943-7889.0001971}, doi = {10.1061/(ASCE)EM.1943-7889.0001971}, language = {en}, number = {10}, urldate = {2022-01-28}, journal = {Journal of Engineering Mechanics}, author = {Simpson, Thomas and Dervilis, Nikolaos and Chatzi, Eleni}, month = oct, year = {2021}, pages = {04021061}, file = {Submitted Version:C\:\\Users\\niebl\\Zotero\\storage\\5UI85NLZ\\Simpson et al. - 2021 - Machine Learning Approach to Model Order Reduction.pdf:application/pdf}, } @article{maulik_reduced-order_2021, title = {Reduced-order modeling of advection-dominated systems with recurrent neural networks and convolutional autoencoders}, volume = {33}, issn = {1070-6631, 1089-7666}, url = {https://aip.scitation.org/doi/10.1063/5.0039986}, doi = {10.1063/5.0039986}, language = {en}, number = {3}, urldate = {2022-01-28}, journal = {Physics of Fluids}, author = {Maulik, Romit and Lusch, Bethany and Balaprakash, Prasanna}, month = mar, year = {2021}, pages = {037106}, annote = {Simple paper, in which viscous Burgers equation and shallow water equation are solved in the latent space. They use an CAE and an LSTM for this purpose. They even added another physical parameter in the latent space. Overall, quite successfull with a git-repository. }, file = {Submitted Version:C\:\\Users\\niebl\\Zotero\\storage\\MPU4KQYE\\Maulik et al. - 2021 - Reduced-order modeling of advection-dominated syst.pdf:application/pdf}, } @article{wu_reduced_2021, title = {Reduced order model using convolutional auto-encoder with self-attention}, volume = {33}, issn = {1070-6631, 1089-7666}, url = {https://aip.scitation.org/doi/10.1063/5.0051155}, doi = {10.1063/5.0051155}, language = {en}, number = {7}, urldate = {2022-01-28}, journal = {Physics of Fluids}, author = {Wu, Pin and Gong, Siquan and Pan, Kaikai and Qiu, Feng and Feng, Weibing and Pain, Christopher}, month = jul, year = {2021}, pages = {077107}, } @article{barwey_extracting_2020, title = {Extracting {Information} {Overlap} in {Simultaneous} {OH}-{PLIF} and {PIV} {Fields} with {Neural} {Networks}}, url = {http://arxiv.org/abs/2003.03662}, abstract = {Simultaneous measurements, such as the combination of particle image velocimetry (PIV) for velocity fields with planar laser induced fluorescence (PLIF) for species fields, are widely used in experimental turbulent combustion applications for the analysis of a plethora of complex physical processes. Such physical analyses are driven by the interpretation of spatial correlations between these fields by the experimenter. However, these correlations also imply some amount of intrinsic redundancy; the simultaneous fields contain overlapping information content. The goal of this work lies in the quantitative extraction of this overlapping information content in simultaneous field measurements. Specifically, the amount of PIV information contained in simultaneously measured OH-PLIF fields in the domain of a swirl-stabilized combustor is sought. This task is accomplished using machine learning techniques based on artificial neural networks designed to optimize PLIF-to-PIV mappings. It was found that most of the velocity information content could be retrieved when considering linear combinations of neighborhoods of OH-PLIF signal spanning roughly two integral lengthscales (half of the considered domain), and that PLIF signal interactions contained in smaller, local regions (less than half of the domain) contained no PIV information. Further, by visualizing the coherent structures contained within the neural network parameters, the role of multi-scale interactions related to velocity field retrieval from the OH-PLIF signal became more apparent. Overall, this study reveals a useful pathway (in the form of overlapping information content extraction) to develop diagnostic tools that capture more information using the same experimental resources by minimizing redundancy.}, urldate = {2022-01-26}, journal = {arXiv:2003.03662 [physics]}, author = {Barwey, Shivam and Raman, Venkat and Steinberg, Adam}, month = mar, year = {2020}, note = {arXiv: 2003.03662}, keywords = {fluid dynamics}, file = {arXiv Fulltext PDF:C\:\\Users\\niebl\\Zotero\\storage\\RIWPNLSZ\\Barwey et al. - 2020 - Extracting Information Overlap in Simultaneous OH-.pdf:application/pdf;arXiv.org Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\9J8RWDVF\\2003.html:text/html}, } @phdthesis{zimmermann_modeling_2018, address = {München}, type = {Bachelor {Thesis}}, title = {Modeling the {Influence} of {Gas} {Expansion} on the {Linear} {Response} of {Laminar} {Premixed} {Flames}}, url = {https://mediatum.ub.tum.de/1456533}, language = {en}, school = {Technische Universität München}, author = {Zimmermann, Axel}, month = oct, year = {2018}, note = {Supervisor: Steinbacher}, file = {Zimmermann - Modeling the Influence of Gas Expansion on the Line.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PT953C2S\\Zimmermann - Modeling the Influence of Gas Expansion on the Line.pdf:application/pdf}, } @phdthesis{Hamma19, type = {Bachelor {Thesis}}, title = {Hybride numerische {Untersuchung} des {Transferverhaltens} von verlustbehafteten {Düsen} für {Akustik} und {Entropiewellen}}, school = {TU München}, author = {Hammami, Mehdi}, month = jul, year = {2019}, note = {Supervisor: Max Meindl}, file = {Hammami - 2019 - Hybride numerische Untersuchung des Transferverhal.pdf:C\:\\Users\\niebl\\Zotero\\storage\\LLRFWZS8\\Hammami - 2019 - Hybride numerische Untersuchung des Transferverhal.pdf:application/pdf}, } @inproceedings{JaensPolif16, address = {Bad Neuenahrt, Germany}, series = {R574 / {R575}}, title = {{CFD}-basierte, niedrigdimensionale {Modellierung} der nichtlinearen {Dynamik} von {Vormischflammen}}, booktitle = {Informationstagung {Motoren}/{Turbomaschinen}}, publisher = {FVV}, author = {Jaensch, S. and Polifke, W.}, year = {2016}, keywords = {NonPerRevJ}, file = {Jaensch_Polifke_TUM_nichtlineare_Flammendynamik_Nr_1115.pdf:C\:\\Users\\niebl\\Zotero\\storage\\J3863MVT\\Jaensch_Polifke_TUM_nichtlineare_Flammendynamik_Nr_1115.pdf:application/pdf}, } @article{siddani_machine_2021, title = {Machine learning for physics-informed generation of dispersed multiphase flow using generative adversarial networks}, volume = {35}, issn = {0935-4964, 1432-2250}, url = {https://link.springer.com/10.1007/s00162-021-00593-9}, doi = {10.1007/s00162-021-00593-9}, language = {en}, number = {6}, urldate = {2022-07-14}, journal = {Theoretical and Computational Fluid Dynamics}, author = {Siddani, B. and Balachandar, S. and Moore, W. C. and Yang, Y. and Fang, R.}, month = dec, year = {2021}, pages = {807--830}, file = {Siddani et al_2021_Machine learning for physics-informed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KGSGRKRX\\Siddani et al_2021_Machine learning for physics-informed.pdf:application/pdf}, } @phdthesis{Niebl22, type = {Semester {Thesis}}, title = {Physics-{Informed} {Neural} {Networks} for {Accessing} {Properties} in {Acoustic} {Flows}}, school = {TU München}, author = {Niebler, Korbinian}, month = may, year = {2022}, note = {Betreuer: Silva/Bonnaire}, file = {Niebler - 2022 - Physics-Informed Neural Networks for Accessing Pro.pdf:C\:\\Users\\niebl\\Zotero\\storage\\43ZMC86G\\Niebler - 2022 - Physics-Informed Neural Networks for Accessing Pro.pdf:application/pdf}, } @phdthesis{Xie22, type = {Bachelor {Thesis}}, title = {Phasor {Diagrams} for {Investigating} {Damping} {Effects} of {Resonators}}, school = {TU München}, author = {Xie, Yuanshun}, month = apr, year = {2022}, note = {Betreuer: Bonnaire}, file = {Xie - 2022 - Phasor Diagrams for Investigating Damping Effects .pdf:C\:\\Users\\niebl\\Zotero\\storage\\JXZ3VJFH\\Xie - 2022 - Phasor Diagrams for Investigating Damping Effects .pdf:application/pdf}, } @article{SteinPolif22, title = {Convective {Velocity} {Perturbations} and {Excess} {Gain} in {Flame} {Response} as a {Result} of {Flame}-{Flow} {Feedback}}, volume = {7}, url = {https://www.mdpi.com/2311-5521/7/2/61/pd}, doi = {10.3390/fluids7020061}, number = {2}, journal = {Fluids}, author = {Steinbacher, Thomas and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {61}, file = {Steinbacher_Polifke_2022_Convective Velocity Perturbations and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\A9UJ4RMI\\Steinbacher_Polifke_2022_Convective Velocity Perturbations and.pdf:application/pdf}, } @phdthesis{Sarit22, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Building {2D} {Validation} {Case} with {EigenValue} {Computation} for {Aeroacoustic} {Stability} {Analysis} {Code}}, language = {English}, school = {TU München}, author = {Saritas, Olida}, month = jun, year = {2022}, note = {Betreuer: Grégoire Varillon Wolfgang Polifke}, file = {Saritas - 2022 - Building 2D Validation Case with EigenValue Comput.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S88FNL3H\\Saritas - 2022 - Building 2D Validation Case with EigenValue Comput.pdf:application/pdf}, } @article{SilvaPette20, title = {Uncertainty quantification of combustion noise by generalized polynomial chaos and state-space models}, volume = {217}, issn = {00102180}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218020301115}, doi = {10.1016/j.combustflame.2020.03.010}, language = {en}, urldate = {2020-04-20}, journal = {Combustion and Flame}, author = {Silva, Camilo F. and Pettersson, P. and Iaccarino, G. and Ihme, M.}, month = jul, year = {2020}, keywords = {archived, MediaTUM}, pages = {113--130}, file = {Silva et al. - 2020 - Uncertainty quantification of combustion noise by .pdf:C\:\\Users\\niebl\\Zotero\\storage\\YECBP5DF\\Silva et al. - 2020 - Uncertainty quantification of combustion noise by .pdf:application/pdf}, } @inproceedings{dwight_efficient_2009, series = {Structures, {Structural} {Dynamics}, and {Materials} and {Co}-located {Conferences}}, title = {Efficient {Uncertainty} {Quantification} {Using} {Gradient}-{Enhanced} {Kriging}}, url = {https://arc.aiaa.org/doi/10.2514/6.2009-2276}, doi = {10.2514/6.2009-2276}, urldate = {2020-10-16}, booktitle = {50th {AIAA}/{ASME}/{ASCE}/{AHS}/{ASC} {Structures}, {Structural} {Dynamics}, and {Materials} {Conference}}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Dwight, Richard and Han, Zhong-Hua}, month = may, year = {2009}, note = {tex.ids= DwighHan09}, file = {dwight2009.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2JCFVS2I\\dwight2009.pdf:application/pdf;Full Text:C\:\\Users\\niebl\\Zotero\\storage\\WKUKNL4F\\Dwight and Han - 2009 - Efficient Uncertainty Quantification Using Gradien.pdf:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\7IKP6BF7\\6.html:text/html}, } @phdthesis{Beis22, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Accurate {Species} {Transport} in {1D} {Laminar} {Flames}: {H2} {Combustion} for {Clean} {Gas} {Turbine}}, school = {TU München}, author = {Beis, Ioannis}, month = jun, year = {2022}, note = {Betreuer: Alexander Eder/Grégoire Varillon}, file = {Beis - 2022 - Accurate Species Transport in 1D Laminar Flames C.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RKE7KY2T\\Beis - 2022 - Accurate Species Transport in 1D Laminar Flames C.pdf:application/pdf}, } @article{GhaniPolif21, title = {An exceptional point switches stability of a thermoacoustic experiment}, volume = {920}, issn = {0022-1120, 1469-7645}, doi = {10.1017/jfm.2021.480}, language = {en}, journal = {Journal of Fluid Mechanics}, author = {Ghani, Abdulla and Polifke, Wolfgang}, month = aug, year = {2021}, keywords = {published, MediaTUM, ITA}, pages = {R3}, file = {Ghani_Polifke_2021_An exceptional point switches stability.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T9LCRQKT\\Ghani_Polifke_2021_An exceptional point switches stability.pdf:application/pdf}, } @article{ghani_control_2021, title = {Control of {Intrinsic} {Thermoacoustic} {Instabilities} using {Hydrogen} {Fuel}}, volume = {38}, url = {www.sciencedirect.com/science/article/pii/S1540748920302315?via%3Dihub}, doi = {10.1016/j.proci.2020.06.151}, number = {4}, journal = {Proc. Comb. Inst.}, author = {Ghani, Abdulla and Polifke, Wolfgang}, year = {2021}, note = {tex.ids= GhaniPolif21b}, keywords = {Intrinsic thermoacoustic feedback, published, ITA}, pages = {6077--6084}, file = {Ghani and Polifke - 2021 - Control of intrinsic thermoacoustic instabilities .pdf:C\:\\Users\\niebl\\Zotero\\storage\\L6XKK6LS\\Ghani and Polifke - 2021 - Control of intrinsic thermoacoustic instabilities .pdf:application/pdf;Ghani_Polifke_2021_Control of Intrinsic Thermoacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\58H3FXZ5\\Ghani_Polifke_2021_Control of Intrinsic Thermoacoustic.pdf:application/pdf}, } @techreport{mousavi_combination_2020, title = {Combination of {reactingFoam} and {chtMultiRegionFoam} as a first step toward creating a {multiRegionReactingFoam}, suitable for solid/gas phase reactions}, institution = {Chalmers University of Technology}, author = {Mousavi, S. M.}, month = jan, year = {2020}, file = {Mousavi - 2020 - Combination of reactingFoam and chtMultiRegionFoam.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QDTPKFH3\\Mousavi - 2020 - Combination of reactingFoam and chtMultiRegionFoam.pdf:application/pdf}, } @inproceedings{EvesqPolif03, address = {Hilton Head, S.C., U.S.A.}, series = {{AIAA} 2003-3182}, title = {Spinning and {Azimuthally} {Standing} {Acoustic} {Modes} in {Annular} {Combustors}}, url = {http://arc.aiaa.org/doi/pdf/10.2514/6.2003-3182}, doi = {10.2514/6.2003-3182}, urldate = {2014-11-10}, booktitle = {9th {AIAA}/{CEAS} {Aeroacoustics} {Conf}.}, author = {Evesque, Stephanie and Polifke, Wolfgang and Pankiewitz, Christian}, year = {2003}, keywords = {Stability, Thermo-acoustics, archived, Low order model, Acoustics, transfer matrix}, file = {Evesque et al_2003_Spinning and Azimuthally Standing Acoustic Modes in Annular Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FP7GN3UB\\Evesque et al_2003_Spinning and Azimuthally Standing Acoustic Modes in Annular Combustors.pdf:application/pdf}, } @inproceedings{BurenForne20, address = {Prague, CZ}, title = {Acoustic {Impedance} of a {Quarter}-{Wave} {Resonator} with {Non}-{Uniform} {Temperature}}, url = {https://iiav.org/content/archives_icsv/2021_icsv27/content/papers/papers/full_paper_958_20210411153706579.pdf}, booktitle = {27th {International} {Congress} on {Sound} and {Vibration} {Sound} {Vibration} ({ICSV27})}, author = {Buren, S. van and Förner, K. and Polifke, W}, month = jul, year = {2021}, keywords = {MediaTUM}, file = {Buren et al_2021_Acoustic Impedance of a Quarter-Wave.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2YVBEVSP\\Buren et al_2021_Acoustic Impedance of a Quarter-Wave.pdf:application/pdf}, } @inproceedings{KuhlmGuo21, address = {Prague, CZ}, title = {A {Top} {Level} {Parallelization} and {Data} {Fusion} {Approach} for {Identification} of {Flame} {Transfer} {Functions} with {Increased} {Reliability}, {Accuracy} and {Efficiency}}, url = {https://iiav.org/content/archives_icsv/2021_icsv27/content/papers/papers/full_paper_1346_20210430113108201.pdf}, abstract = {The present study investigates a novel design of numerical experiment and data analysis procedure for Flame Transfer Function (FTF) identification to reduce return time and computational cost in thermoacoustic stability analysis. A machine learning approach called Multi-Fidelity Gaussian Process (MFGP) fuses mono-frequent and broad-band excitation data in order to retain the strengths of each method and avoid their weaknesses. The FTF is determined as the most likely function considering all data sets through a maximum likelihood approximator. Therein the global trend of the function is provided by the broad-band part and its accuracy and certainty is greatly increased near the frequencies of harmonic excitation. Only a few mono-frequent training samples are required for the resulting function to satisfy the accuracy and uncertainty bounds provided by harmonic test samples over the whole frequency range. This greatly reduces the effort compared to pure mono-frequent excitation and increases the accuracy compared to broad-band excitation. This is the first time this method is applied to data originating from an LES of an applied burner, which allows the use as a predictive tool in burner design. Experimental FTF measurements serve for validation purpose. The uncertainties of the mono-frequent excitation are calculated from the LES data and not assumed. As the single simulation already runs in parallel scalability limit, a top-level parallelization approach is introduced to decrease the return time significantly. Overall the MFGP greatly increases the accuracy of the FTF identification and reduces return time and computational effort by a wide margin.}, booktitle = {"{Advances} in {Acoustics}, {Noise} and {Vibration} - 2021" {Proceedings} of the 27th {Int}. {Conf}. {Sound} {Vibration} ({ICSV27})}, author = {Kuhlmann, Johannes and Guo, Shuai and Polifke, Wolfgang}, year = {2021}, keywords = {published online}, file = {KuhlmannGuo21.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IFTSTUFU\\IFTSTUFU.pdf:application/pdf}, } @inproceedings{MagriDoan19, address = {Imperial College, London, UK}, title = {Data-driven prediction of rare and extreme events in turbulent reacting flows}, abstract = {Energy supply is one of the main challenges facing our society with an ever-increasing demand. Around 80\% of the world's power still comes from burning fossil fuels and the use of fossil fuels is likely to continue for the foreseeable future. The novel MILD combustion technology enables environmentally-friendly combustion: By utilizing exhaust gas recirculation, MILD technology increases combustion efficiency by up to 30\%, while reducing NOx emissions by two orders of magnitude and sound emissions by 10dB. Therefore, MILD combustion is attracting large interest in gas turbine applications for lean and clean power generation, but fundamental questions are still open. The intricate multi-physical, multi-scale interactions between turbulence and chemistry reactions is yet to be fully understood. In fact, direct numerical simulations of the turbulent reacting fluid dynamics of MILD combustion have shown the occurrence of sudden and violent phenomena, such as ignition kernels, which (seemingly) randomly appear in the mixture, and flame propagating in unpredictable directions. It is paramount to understand the physical precursors of auto-ignition kernels and the directions of flame propagation because, by exploiting them, engineers can maximise homogeneous reactions and temperature fields, which further improve efficiency, emissions and combustion stability. Whereas the calculation of the statistics of turbulent reacting flows may be accurate, no matter how accurate the simulation code is, the time and space prediction of rare and extreme events is very difficult to achieve because of the chaotic nature of turbulence. We propose to time- and space-accurately predict rare and extreme events in turbulent reacting flows by leveraging on data-driven algorithms in machine learning and dynamical systems’ theory. The applicability of these methods hinges on the availability of sufficient data that captures enough rare events. First, we perform direct numerical simulations of two turbulent reacting cases as relevant to MILD combustion (“flame in a box” cases), which provide the database to apply data driven methods. Secondly, we post-process the data by using community clustering combined with phase- space embedding to separate the slow dynamics from the fast-intermittent manifold. Spectral proper orthogonal decomposition is used to efficiently extract a low-rank approximation of the slow dynamics from the data. This enables the development of a reduced order model of the turbulent reacting flow, whose parameters are trained by an ensemble Kalman filter. The algorithms are trained by several direct numerical simulations to capture a sufficient number of rare events. Finally, the physical precursors and flow structures that precede rare events are identified and classified. Data-driven techniques open up new possibilities for the prediction of rare and extreme events in turbulent reacting flows.}, booktitle = {Symposium on {Machine} {Learning} for {Dynamical} {Systems}}, author = {Magri, Luca and Doan, N. A. K. and Schmidt, O. and Polifke, W. and Schmid, P.}, month = feb, year = {2019}, keywords = {MediaTUM*}, file = {Magri et al_2019_Data-driven prediction of rare and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BKI43YEJ\\Magri et al_2019_Data-driven prediction of rare and.pdf:application/pdf}, } @article{BombeEmmer15, title = {Thermal {Versus} {Acoustic} {Response} of {Velocity} {Sensitive} {Premixed} {Flames}}, volume = {35}, issn = {15407489}, doi = {10.1016/j.proci.2014.07.032}, language = {en}, number = {3}, journal = {Proceedings of the Combustion Institute}, author = {Bomberg, S. and Emmert, T. and Polifke, W.}, year = {2015}, keywords = {published, Combustion dynamics, Premixed flame, Flame transfer function, Thermoacoustic instability, causality}, pages = {3185--3192}, file = {Bomberg et al_2015_Thermal Versus Acoustic Response of Velocity Sensitive Premixed Flames.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PPKUR562\\Bomberg et al_2015_Thermal Versus Acoustic Response of Velocity Sensitive Premixed Flames.pdf:application/pdf}, } @article{EmmerBombe15, title = {Intrinsic {Thermoacoustic} {Instability} of {Premixed} {Flames}}, volume = {162}, issn = {00102180}, doi = {10.1016/j.combustflame.2014.06.008}, language = {en}, number = {1}, journal = {Combustion and Flame}, author = {Emmert, Thomas and Bomberg, Sebastian and Polifke, Wolfgang}, month = jan, year = {2015}, keywords = {Intrinsic thermoacoustic feedback, Thermoacoustics, Combustion dynamics, Premixed flame, Frequency response, Acoustic energy, Small gain theorem}, pages = {75--85}, file = {Emmert et al_2015_Intrinsic Thermoacoustic Instability of Premixed Flames.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8VVEKFD8\\Emmert et al_2015_Intrinsic Thermoacoustic Instability of Premixed Flames.pdf:application/pdf}, } @article{StrobBombe16, title = {Propagation and {Generation} of {Acoustic} and {Entropy} {Waves} {Across} a {Moving} {Flame} {Front}}, volume = {166}, url = {http://www.sciencedirect.com/science/article/pii/S0010218016000286}, doi = {10.1016/j.combustflame.2016.01.015}, journal = {Combustion and Flame}, author = {Strobio Chen, Lin and Bomberg, Sebastian and Polifke, Wolfgang}, year = {2016}, keywords = {published}, pages = {170--180}, file = {Strobio Chen et al. - 2016 - Propagation and Generation of Acoustic and Entropy.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JLIXJ788\\Strobio Chen et al. - 2016 - Propagation and Generation of Acoustic and Entropy.pdf:application/pdf}, } @article{EmmerBombe17, title = {Acoustic and intrinsic thermoacoustic modes of a premixed combustor}, volume = {36}, issn = {15407489}, doi = {10.1016/j.proci.2016.08.002}, language = {en}, number = {3}, journal = {Proceedings of the Combustion Institute}, author = {Emmert, T. and Bomberg, S. and Jaensch, S. and Polifke, W.}, year = {2017}, keywords = {published, MediaTUM, PerRev}, pages = {3835--3842}, annote = {Equation 3 and 4 are wrong. Second row, third column. It should not be theta but alpha * theta}, file = {Emmert et al. - 2017 - Acoustic and intrinsic thermoacoustic modes of a p.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7C8RMUHM\\Emmert et al. - 2017 - Acoustic and intrinsic thermoacoustic modes of a p.pdf:application/pdf}, } @article{AlbayStein17a, title = {Convective {Scaling} of {Intrinsic} {Thermo}-{Acoustic} {Eigenfrequencies} of a {Premixed} {Swirl} {Combustor}}, volume = {140}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4038083}, language = {en}, number = {4}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Albayrak, Alp and Steinbacher, Thomas and Komarek, Thomas and Polifke, Wolfgang}, month = apr, year = {2018}, keywords = {archived, MediaTUM}, pages = {041510}, file = {Albayrak et al_2017_Convective Scaling of Intrinsic Thermo-Acoustic Eigenfrequencies of a Premixed.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WZSD2STA\\Albayrak et al_2017_Convective Scaling of Intrinsic Thermo-Acoustic Eigenfrequencies of a Premixed.pdf:application/pdf}, } @article{GhaniStein19, title = {Intrinsic thermoacoustic feedback loop in turbulent spray flames}, volume = {205}, url = {https://www.sciencedirect.com/science/article/pii/S0010218019301415?dgcid=author}, doi = {10.1016/j.combustflame.2019.03.039}, abstract = {This paper investigates low-frequency thermoacoustic instabilities of a turbulent spray flame, a phenomenon known as ‘rumble’. Based on experimental data, a network model analysis is performed, which suggests an intrinsic thermoacoustic (ITA) feedback loop as the root cause of instability. At first, the ITA nature of the observed instability is confirmed by a parametric analysis, which reveals the sensitivity of the instability frequency to the time delay of the flame. Then, we investigate pure acoustic modes and pure ITA modes, which couple to the full system modes such that the origin and the trajectory of each mode is trackable. Finally, we show that the unstable mode frequency scales with the inlet bulk velocity: a feature that clearly separates the observed instability from classical cavity modes. The network model results are corroborated by phasor plots, in which all relevant phase information is compiled. It reveals the phase of the Flame Transfer Function (FTF) contributing to the instability and provides an estimate of the ITA frequency, which agrees well with the dominant peak in the experimental pressure spectrum. Additionally, the obtained flame phase is used to infer the instability frequency by the experimentally measured droplet burning time τB, which reproduces similar trends as experimental and network model results. This theoretical study confirms that (1) ITA feedback loops are important for spray flames, (2) that the ITA instability of the experiment scrutinized is controlled by the droplet dynamics and (3) ITA modes appear also in acoustically closed systems.}, number = {7}, journal = {Combustion and Flame}, author = {Ghani, Abdulla and Steinbacher, Thomas and Albayrak, Alp and Polifke, Wolfgang}, year = {2019}, keywords = {Intrinsic thermoacoustic feedback, MediaTUM, ITA}, pages = {22--32}, file = {Ghani, et al_2019_Intrinsic thermoacoustic feedback loop.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SJAN4RJA\\Ghani, et al_2019_Intrinsic thermoacoustic feedback loop.pdf:application/pdf}, } @article{GuoSilva18a, title = {Evaluating the impact of uncertainty in flame impulse response model on thermoacoustic instability prediction: {A} dimensionality reduction approach}, volume = {37}, doi = {10.1016/j.proci.2018.07.020}, abstract = {The flame response to upstream velocity perturbations is properly described by a Finite Impulse Response (FIR) model. When combining an FIR model with acoustic tools to predict thermoacoustic modal growth rates, uncertainties contained in the FIR model coefficients would propagate through the acoustic model, inducing deviations of the modal growth rate from its nominal value. Therefore, an associated uncertainty quantification (UQ) analysis, which focuses on quantifying the impact of FIR model uncertainties on the modal growth rate prediction, is a necessity to obtain a more reliable thermoacoustic instability prediction. To address this UQ problem, our present work proposes an analytical strategy featuring (1) compactly summarizing the causal relationship between variations of FIR model coefficients and variations of modal growth rates; (2) Effectively shrinking the dimension of the UQ problem; (3) Requiring only negligible computational cost; (4) Involving no complex mathematical treatments. Our case studies yielded 5000 times faster yet highly accurate UQ analyses compared with reference Monte Carlo simulations, even though a significant level of FIR model uncertainty is present. The analytical approach brings additional benefits including (1) visualization of the process from the variations of FIR model coefficients to the variations of modal growth rate; (2) Easily-obtainable sensitivity measurement for each FIR model coefficient, which can help identify key mechanisms controlling the thermoacoustic instability; (3) New possibility for robust combustor design, i.e., to minimize the impact of FIR model uncertainty on the thermoacoustic instability prediction.}, journal = {Proceedings of the Combustion Institute}, author = {Guo, Shuai and Silva, Camilo F. and Bauerheim, Michael and Ghani, Abdulla and Polifke, Wolfgang}, year = {2019}, keywords = {MediaTUM*, archived}, pages = {5299--5306}, file = {Guo et al. - 2019 - Evaluating the impact of uncertainty in flame impu.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M2BFE6SW\\Guo et al. - 2019 - Evaluating the impact of uncertainty in flame impu.pdf:application/pdf}, } @article{SilvaYong18a, title = {Thermoacoustic {Modes} of {Quasi}-{One}-{Dimensional} {Combustors} in the {Region} of {Marginal} {Stability}}, volume = {141}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4041118}, language = {en}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Silva, C. and Yong, Kah J. and Magri, Luca}, month = feb, year = {2019}, note = {tex.ids: SilvaYong19}, keywords = {published, archived, MediaTUM}, pages = {021022}, file = {Silva et al. - 2019 - Thermoacoustic Modes of Quasi-One-Dimensional Comb.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B69MT45D\\Silva et al. - 2019 - Thermoacoustic Modes of Quasi-One-Dimensional Comb.pdf:application/pdf}, } @article{OrchiSilva20, title = {Thermoacoustic modes of intrinsic and acoustic origin and their interplay with exceptional points}, volume = {211}, issn = {00102180}, doi = {10.1016/j.combustflame.2019.09.018}, language = {en}, journal = {Combustion and Flame}, author = {Orchini, Alessandro and Silva, Camilo F. and Mensah, Georg A. and Moeck, Jonas P.}, month = jan, year = {2020}, keywords = {MediaTUM}, pages = {83--95}, file = {OrchiniSilva_20.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZI6FA8SJ\\OrchiniSilva_20.pdf:application/pdf}, } @article{YongMeind20, series = {{GTP}-19-1515}, title = {Thermoacoustic spectrum of a swirled premixed combustor with partially reflecting boundaries}, volume = {142}, doi = {10.1115/1.4045275}, number = {(1)}, journal = {J. Eng. Gas Turbines Power}, author = {Yong, Kah Joon and Meindl, Max and Polifke, W. and Silva, C. F.}, year = {2020}, keywords = {archived, MediaTUM}, pages = {011005}, file = {Yong et al. - 2020 - Thermoacoustic spectrum of a swirled premixed comb.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RDADTEVZ\\Yong et al. - 2020 - Thermoacoustic spectrum of a swirled premixed comb.pdf:application/pdf}, } @article{FournHaeri20a, title = {Low-{Order} {Modeling} to {Investigate} {Clusters} of {Intrinsic} {Thermoacoustic} {Modes} in {Annular} {Combustors}}, volume = {143}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4049356}, language = {en}, number = {4}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Fournier, Guillaume J. J. and Haeringer, Matthias and Silva, Camilo F. and Polifke, Wolfgang}, month = apr, year = {2021}, keywords = {MediaTUM, Archived}, pages = {041025}, file = {Fournier et al. - 2021 - Low-Order Modeling to Investigate Clusters of Intr.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZYNDJQNQ\\Fournier et al. - 2021 - Low-Order Modeling to Investigate Clusters of Intr.pdf:application/pdf}, } @article{YongSilva21, title = {A categorization of marginally stable thermoacoustic modes based on phasor diagrams}, volume = {228}, issn = {0010-2180}, doi = {10.1016/j.combustflame.2021.01.003}, language = {en}, journal = {Combustion and Flame}, author = {Yong, Kah Joon and Silva, Camilo F. and Polifke, Wolfgang}, month = jun, year = {2021}, keywords = {MediaTUM}, pages = {236--249}, file = {Yong_et_al_2021_A Categorization of Marginally Stable.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MTDPG4Y7\\Yong_et_al_2021_A Categorization of Marginally Stable.pdf:application/pdf}, } @misc{oord_wavenet_2016, title = {{WaveNet}: {A} {Generative} {Model} for {Raw} {Audio}}, shorttitle = {{WaveNet}}, url = {http://arxiv.org/abs/1609.03499}, abstract = {This paper introduces WaveNet, a deep neural network for generating raw audio waveforms. The model is fully probabilistic and autoregressive, with the predictive distribution for each audio sample conditioned on all previous ones; nonetheless we show that it can be efficiently trained on data with tens of thousands of samples per second of audio. When applied to text-to-speech, it yields state-ofthe-art performance, with human listeners rating it as significantly more natural sounding than the best parametric and concatenative systems for both English and Mandarin. A single WaveNet can capture the characteristics of many different speakers with equal fidelity, and can switch between them by conditioning on the speaker identity. When trained to model music, we find that it generates novel and often highly realistic musical fragments. We also show that it can be employed as a discriminative model, returning promising results for phoneme recognition.}, language = {en}, urldate = {2022-08-01}, publisher = {arXiv}, author = {Oord, Aaron van den and Dieleman, Sander and Zen, Heiga and Simonyan, Karen and Vinyals, Oriol and Graves, Alex and Kalchbrenner, Nal and Senior, Andrew and Kavukcuoglu, Koray}, month = sep, year = {2016}, note = {arXiv:1609.03499 [cs]}, keywords = {machine learning, Computer Science - Sound}, file = {Oord et al. - 2016 - WaveNet A Generative Model for Raw Audio.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IZSP3XTQ\\Oord et al. - 2016 - WaveNet A Generative Model for Raw Audio.pdf:application/pdf}, } @phdthesis{Blume15, type = {Ph.{D}. {Thesis}}, title = {A {Systems} {View} on {Non}-{Normal} {Transient} {Growth} in {Thermoacoustics}}, url = {https://mediatum.ub.tum.de/download/1245769/1245769.pdf}, school = {Technische Universität München}, author = {Blumenthal, Ralf S.}, year = {2015}, file = {Blumenthal, Ralf S._2015_A Systems View on Non-Normal Transient Growth in Thermoacoustics.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BVU8XP5N\\Blumenthal, Ralf S._2015_A Systems View on Non-Normal Transient Growth in Thermoacoustics.pdf:application/pdf}, } @article{SchaeMagri21a, title = {A {Hybrid} {Adjoint} {Network} {Model} for {Thermoacoustic} {Optimization}}, volume = {144}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/144/3/031017/1115195/A-Hybrid-Adjoint-Network-Model-for-Thermoacoustic}, doi = {10.1115/1.4051959}, language = {en}, number = {3}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Schaefer, Felicitas and Magri, Luca and Polifke, Wolfgang}, month = mar, year = {2022}, note = {tex.ids= SchafMagri22}, keywords = {archived, MediaTUM}, pages = {031017}, file = {Schaefer et al_2022_A Hybrid Adjoint Network Model for.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z6LMEBCA\\Schaefer et al_2022_A Hybrid Adjoint Network Model for.pdf:application/pdf}, } @inproceedings{surendran_low_2022, address = {Glasgow, UK}, title = {Low order modelling of thermoacoustic instabilities in aero-propulsion engines}, abstract = {In the present work, we investigate the thermoacoustic stability behaviour of a combustor-heat exchanger assembly pertinent to the Synergetic Air Breathing Rocket Engine (SABRE) of Reaction Engines Ltd. Since the thermoacoustic behaviour of heat exchangers is poorly understood, we have approximated it to a combination of heat transfer/heat sink and aeroacoustic scattering (dissipation) mechanisms. The - NTU method is used to characterise the low frequency, linearised unsteady heat transfer (heat exchanger transfer function) behaviour in compact heat exchangers. The aeroacoustic response of the tube row is evaluated from the linearised conservation equations, wherein the hydrodynamics of the bias flow in the tube row is described as being similar to that of an isentropic contraction followed by a sudden expansion. The stability predictions are carried out through low order modelling of the combustor and subsequent eigenvalue analysis. The flame dynamics is approximated using the n − τ law, with tau being a parameter. Stability predictions show that the thermoacoustic response of the heat exchanger was dominated by aeroacoustic dissipation. Only one mode was predicted to be unstable and can be stabilised by moving the heat exchanger upstream. Further work is required to better characterise the flame and the heat exchanger transfer functions.}, language = {en}, author = {Surendran, Aswathy and Boakes, Charles and Yang, Dong and Morgans, Aimee S}, year = {2022}, pages = {10}, file = {Surendran et al. - Low order modelling of thermoacoustic instabilitie.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZHJI8P4W\\Surendran et al. - Low order modelling of thermoacoustic instabilitie.pdf:application/pdf}, } @article{surendran_low_2022-1, title = {A low frequency model for the aeroacoustic scattering of cylindrical tube rows in cross-flow}, volume = {527}, doi = {https://doi.org/10.1016/j.jsv.2022.116806}, abstract = {Heat exchanger tube rows can influence the thermoacoustic instability behaviour of combustion systems since they act as both acoustic scatterers and unsteady heat sinks. Therefore, with careful tuning of their thermoacoustic properties, heat exchangers have the potential to act as passive control devices. In this work, we focus on (only) the acoustic scattering behaviour of heat exchanger tubes. We present a comparison of existing acoustic models for tube rows and slits, models for the latter having the advantage of incorporating frequency dependence. We then propose a new model that enables the adaptation of slit models for tube rows. This model is validated against experiments and Linearised Navier–Stokes Equations (LNSE) predictions for the transmission and reflection coefficients, including phase information. The model predictions show very good agreement with the experimental and numerical validations, especially for low frequencies (Strouhal number {\textless} 0.5, based on tube radius and excitation frequency), with mean differences less than 2\% for the transmission coefficients (the reflection coefficient errors are somewhat larger since their magnitudes are very close to zero).}, journal = {Journal of Sound and Vibration}, author = {Surendran, Aswathy and Na, Wei and Boakes, Charles and Yang, Dong and Morgans, Aimee S. and Boij, Susann}, year = {2022}, file = {Surendran et al. - 2022 - A low frequency model for the aeroacoustic scatter.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6K4VJYPY\\Surendran et al. - 2022 - A low frequency model for the aeroacoustic scatter.pdf:application/pdf;SurenNa22_JSV_presentation_2022_05_02.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7L4D6246\\SurenNa22_JSV_presentation_2022_05_02.pdf:application/pdf}, } @article{HaeriPolif22, title = {Hybrid {CFD}/low-order modeling of thermoacoustic limit cycle oscillations in can-annular configurations}, volume = {14}, doi = {10.1177/17568277221085953}, number = {1--2}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Haeringer, Matthias and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {143--152}, file = {Haeringer_Polifke_2022_Hybrid CFD-low-order modeling of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YZS3H2GM\\Haeringer_Polifke_2022_Hybrid CFD-low-order modeling of.pdf:application/pdf}, } @article{KulkaSilva22, title = {Response of {Spray} {Number} {Density} and {Evaporation} {Rate} to {Velocity} {Oscillations}}, volume = {14}, url = {https://journals.sagepub.com/doi/full/10.1177/17568277221085957}, doi = {10.1177/17568277221085957}, number = {1-2}, journal = {Int. J. Spray Comb. Dynamics}, author = {Kulkarni, Sagar and Silva, Camilo F. and Polifke, Wolfgang}, year = {2022}, keywords = {archived, MediaTUM}, pages = {107--117}, file = {Kulkarni et al_2022_Response of Spray Number Density and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PVDFGUQR\\Kulkarni et al_2022_Response of Spray Number Density and.pdf:application/pdf}, } @inproceedings{HuberRoman07, title = {Parameter-based {Identification} of acoustic {Transfer} {Functions} and {Matrices}}, booktitle = {2nd {GACM} {Colloquim} on {Computational} {Mechanics}}, publisher = {2nd GACM Colloquim on Computational Mechanics, 10.-12. October, Munich, Germany}, author = {Huber, A. and Romann, P. and Polifke, W.}, year = {2007}, keywords = {Identification, non-recursive least square method, parametric models}, } @article{FukamNakam20, title = {Convolutional neural network based hierarchical autoencoder for nonlinear mode decomposition of fluid field data}, volume = {32}, issn = {1070-6631, 1089-7666}, url = {http://aip.scitation.org/doi/10.1063/5.0020721}, doi = {10.1063/5.0020721}, language = {en}, number = {9}, urldate = {2022-01-28}, journal = {Physics of Fluids}, author = {Fukami, Kai and Nakamura, Taichi and Fukagata, Koji}, month = sep, year = {2020}, keywords = {Favorite}, pages = {095110}, file = {Submitted Version:C\:\\Users\\niebl\\Zotero\\storage\\Q6BI26MR\\Fukami et al. - 2020 - Convolutional neural network based hierarchical au.pdf:application/pdf}, } @phdthesis{Guo21, address = {München, Germany}, type = {Ph.{D}. {Thesis}}, title = {Uncertainty {Management} in {Thermoacoustic} {Instability} {Analysis}}, language = {English}, school = {TU München}, author = {Guo, Shuai}, year = {2021}, file = {Guo_Thesis.pptx:C\:\\Users\\niebl\\Zotero\\storage\\FF2FGNM7\\Guo_Thesis.pptx:application/vnd.openxmlformats-officedocument.presentationml.presentation;Uncertainty Management in Thermoacoustic Instability Analysis.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8C2RJFNA\\Uncertainty Management in Thermoacoustic Instability Analysis.pdf:application/pdf}, } @inproceedings{KeppePfitz12, address = {Copenhagen, DK}, series = {{GT2012}-68689}, title = {Including heat loss and quench effects in algebraic models for {Large} {Eddy} {Simulation} of premixed combustion}, doi = {10.1115/GT2012-68689}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2012}, author = {Keppeler, Roman and Pfitzner, Michael and Chong, Luis Tay Wo and Komarek, Thomas and Polifke, Wolfgang}, year = {2012}, file = {Keppeler et al_2012_Including heat loss and quench effects.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7UFQZ6R9\\Keppeler et al_2012_Including heat loss and quench effects.pdf:application/pdf}, } @article{ManyiChui11, address = {McKinsey Global Institute}, title = {Big data: {The} next frontier for innovation, competition, and productivity}, journal = {McKinsey Global Institute}, author = {Manyika, James and Chui, Michael and Brown, Brad and Bughin, Jacques and Dobbs, Richard and Roxburgh, Charles and Byers, Angela Hung}, year = {2011}, file = {mgi_big_data_full_report.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GGQJKPPG\\mgi_big_data_full_report.pdf:application/pdf}, } @article{HanHossa20, title = {Combustion stability monitoring through flame imaging and stacked sparse autoencoder based deep neural network}, volume = {259}, issn = {03062619}, url = {https://linkinghub.elsevier.com/retrieve/pii/S030626191931846X}, doi = {10.1016/j.apenergy.2019.114159}, language = {en}, urldate = {2021-01-27}, journal = {Applied Energy}, author = {Han, Zhezhe and Hossain, Md. Moinul and Wang, Yuwei and Li, Jian and Xu, Chuanlong}, month = feb, year = {2020}, keywords = {Autoencoder, Neural network}, pages = {114159}, file = {Han et al_2020_Combustion stability monitoring through.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KTXP523Y\\Han et al_2020_Combustion stability monitoring through.pdf:application/pdf}, } @techreport{bomberg_rankine-hugoniot_2013, title = {Rankine-{Hugoniot} {Relations} {Revisited}}, institution = {TU München}, author = {Bomberg, S.}, year = {2013}, file = {Bomberg_2013_Rankine-Hugoniot Relations Revisited.pdf:C\:\\Users\\niebl\\Zotero\\storage\\52EX55UA\\Bomberg_2013_Rankine-Hugoniot Relations Revisited.pdf:application/pdf}, } @article{MozafAl-Ja22, title = {Deep {Learning}-{Based} {Vehicle} {Behavior} {Prediction} for {Autonomous} {Driving} {Applications}: {A} {Review}}, volume = {23}, issn = {1524-9050, 1558-0016}, shorttitle = {Deep {Learning}-{Based} {Vehicle} {Behavior} {Prediction} for {Autonomous} {Driving} {Applications}}, url = {https://ieeexplore.ieee.org/document/9158529/}, doi = {10.1109/TITS.2020.3012034}, number = {1}, urldate = {2022-04-21}, journal = {IEEE Transactions on Intelligent Transportation Systems}, author = {Mozaffari, Sajjad and Al-Jarrah, Omar Y. and Dianati, Mehrdad and Jennings, Paul and Mouzakitis, Alexandros}, month = jan, year = {2022}, pages = {33--47}, file = {Accepted Version:C\:\\Users\\niebl\\Zotero\\storage\\AVM5N33S\\Mozaffari et al. - 2022 - Deep Learning-Based Vehicle Behavior Prediction fo.pdf:application/pdf}, } @article{SubraBlume15, title = {Distributed {Time} {Lag} {Response} {Functions} for the {Modelling} of {Combustion} {Dynamics}}, volume = {19}, issn = {1364-7830}, url = {http://dx.doi.org/10.1080/13647830.2014.1001438}, doi = {10.1080/13647830.2014.1001438}, abstract = {The present study models a thermoacoustic system in the time domain where, in the limit of small amplitudes, the linear dynamics of a heat source is incorporated in terms of a distributed time lag response function. This approach allows for a description of the heat source that is richer than that in single time lag models such as the well-known n–τ model or modifications thereof. Methods to extract the distributed time lag response function from numerical/experimental frequency response data and to conduct a linear stability analysis for distributed delay differential equations are described in this work. The theory is applied to the test case of experimentally measured frequency response data of a turbulent premixed swirl flame. The use of a distributed time lag response function model for the heat source is shown to contain the entire dynamics of the heat source, as all characteristic timescales of the flame response are inherently reflected in the response function itself. It therefore gives an accurate estimate of the linear stability map in addition to generating valuable insight into the physics behind the transient flame dynamics. In contrast, we show that a single time lag model can only yield correct stability predictions if the unstable eigenfrequency of the system is known a priori with good accuracy. We also show that a single time lag model is in general not capable of capturing the transient dynamics of a thermoacoustic system correctly. It is concluded that the linear response of the heat source in a thermoacoustic system should be represented in terms of a distributed time lag response function rather than a single time lag model, with a view to retaining the rich complexity that is available even in such a low-order model for the heat source.}, number = {2}, journal = {Combustion Theory and Modelling}, author = {Subramanian, P. and Blumenthal, R. S. and Sujith, R. and Polifke, W.}, month = feb, year = {2015}, keywords = {Combustion, Acoustics, Premixed flame}, pages = {223--237}, annote = {Contents Abstract 1.Introduction 2.Linear stability analysis with DTL models 3.To deduce DTL from frequency response data 4.Turbulent premixed swirl burner 5.Stability analysis with the DTL model 6.Comparison of DTL and STL predictions 6.1.Linear stability bounds 6.2.Transient flame dynamics 7.Outlook Acknowledgements References 7.1.Discretised operators and distributions }, annote = {Contents Abstract 1.Introduction 2.Linear stability analysis with DTL models 3.To deduce DTL from frequency response data 4.Turbulent premixed swirl burner 5.Stability analysis with the DTL model 6.Comparison of DTL and STL predictions 6.1.Linear stability bounds 6.2.Transient flame dynamics 7.Outlook Acknowledgements References 7.1.Discretised operators and distributions }, file = {Subramanian et al_2015_Distributed time lag response functions for the modelling of combustion dynamics.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WSJG7WF5\\Subramanian et al_2015_Distributed time lag response functions for the modelling of combustion dynamics.pdf:application/pdf}, } @article{SchmiBlume13, series = {{GTP}-13-1240}, title = {Quantitative {Stability} {Analysis} {Using} {Real} {Frequency} {Response} {Data}}, volume = {135}, doi = {10.1115/1.4025299}, number = {12}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Schmid, Martin and Blumenthal, Ralf and Schulze, Moritz and Polifke, Wolfgang and Sattelmayer, Thomas}, year = {2013}, pages = {121601}, annote = {Caution! Sign error in equations (1), (2) and (3)! Corrections: d RF / d omega = - d IF / d lambda d RF / d lambda = d IF / d omega d{\textasciicircum}2 RF / d lambda{\textasciicircum}2 = - d{\textasciicircum}2 RF / d omega{\textasciicircum}2 easy to check with n-tau flame.}, file = {Schmid et al_2013_Quantitative Stability Analysis Using Real Frequency Response Data.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FWKD7T33\\Schmid et al_2013_Quantitative Stability Analysis Using Real Frequency Response Data.pdf:application/pdf}, } @mastersthesis{Bille22, title = {Evaluation of {Turbulent} {Combustion} {Models} for {LES} in the {Context} of {Thermoacoustic} {Instabilities}}, school = {TU München}, author = {Biller, Benedikt}, year = {2022}, note = {Betreuer: Bonnaire}, file = {Biller - 2022 - Evaluation of Turbulent Combustion Models for LES .pdf:C\:\\Users\\niebl\\Zotero\\storage\\4E48WU7H\\Biller - 2022 - Evaluation of Turbulent Combustion Models for LES .pdf:application/pdf}, } @phdthesis{Conra22, type = {Bachelor {Thesis}}, title = {Modal {Decomposition} {Techniques} for {Analyzing} {Combustion} {Instabilities}}, school = {TU München}, author = {Conrad, Timo}, month = oct, year = {2022}, note = {Betreuer: Bonnaire}, file = {Conrad - 2022 - Modal Decomposition Techniques for Analyzing Combu.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DUA7EUII\\Conrad - 2022 - Modal Decomposition Techniques for Analyzing Combu.pdf:application/pdf}, } @article{GonzaBalaj18, title = {Deep convolutional recurrent autoencoders for learning low-dimensional feature dynamics of fluid systems}, url = {http://arxiv.org/abs/1808.01346}, abstract = {Model reduction of high-dimensional dynamical systems alleviates computational burdens faced in various tasks from design optimization to model predictive control. One popular model reduction approach is based on projecting the governing equations onto a subspace spanned by basis functions obtained from the compression of a dataset of solution snapshots. However, this method is intrusive since the projection requires access to the system operators. Further, some systems may require special treatment of nonlinearities to ensure computational efficiency or additional modeling to preserve stability. In this work we propose a deep learning-based strategy for nonlinear model reduction that is inspired by projection-based model reduction where the idea is to identify some optimal low-dimensional representation and evolve it in time. Our approach constructs a modular model consisting of a deep convolutional autoencoder and a modified LSTM network. The deep convolutional autoencoder returns a low-dimensional representation in terms of coordinates on some expressive nonlinear data-supporting manifold. The dynamics on this manifold are then modeled by the modified LSTM network in a computationally efficient manner. An offline unsupervised training strategy that exploits the model modularity is also developed. We demonstrate our model on three illustrative examples each highlighting the model's performance in prediction tasks for fluid systems with large parameter-variations and its stability in long-term prediction.}, urldate = {2022-02-01}, journal = {arXiv:1808.01346 [physics]}, author = {Gonzalez, Francisco J. and Balajewicz, Maciej}, month = aug, year = {2018}, note = {arXiv: 1808.01346}, keywords = {machine learning, Mathematics - Dynamical Systems, fluid dynamics}, file = {arXiv Fulltext PDF:C\:\\Users\\niebl\\Zotero\\storage\\AVCPHGI8\\Gonzalez and Balajewicz - 2018 - Deep convolutional recurrent autoencoders for lear.pdf:application/pdf;arXiv.org Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\5KZKSL34\\1808.html:text/html}, } @article{PawarRahma19, title = {A deep learning enabler for nonintrusive reduced order modeling of fluid flows}, volume = {31}, issn = {1070-6631, 1089-7666}, url = {http://aip.scitation.org/doi/10.1063/1.5113494}, doi = {10.1063/1.5113494}, language = {en}, number = {8}, urldate = {2022-01-26}, journal = {Physics of Fluids}, author = {Pawar, S. and Rahman, S. M. and Vaddireddy, H. and San, O. and Rasheed, A. and Vedula, P.}, month = aug, year = {2019}, pages = {085101}, file = {Full Text:C\:\\Users\\niebl\\Zotero\\storage\\SXU7WRQE\\Pawar et al. - 2019 - A deep learning enabler for nonintrusive reduced o.pdf:application/pdf}, } @inproceedings{DoanPolif20a, address = {Chicago}, title = {Autoencoded {Reservoir} {Computing} for the {Spatio}- {Temporal} {Prediction} of a {Turbulent} {Flow}}, booktitle = {Bulletin of the {American} {Physical} {Society}}, publisher = {APS}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, month = nov, year = {2020}, keywords = {MediaTUM}, file = {APS_DFD2020_Doan.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8ADUWTP2\\APS_DFD2020_Doan.pdf:application/pdf}, } @article{AkintGwnL20, title = {Prognostics of {Combustion} {Instabilities} from {Hi}-speed {Flame} {Video} using {A} {Deep} {Convolutional} {Selective} {Autoencoder}}, volume = {7}, issn = {2153-2648, 2153-2648}, url = {https://papers.phmsociety.org/index.php/ijphm/article/view/2461}, doi = {10.36001/ijphm.2016.v7i4.2461}, abstract = {The thermo-acoustic instabilities arising in combustion processes cause significant deterioration and safety issues in various human-engineered systems such as land and air based gas turbine engines. The phenomenon is described as selfsustaining and having large amplitude pressure oscillations with varying spatial scales of periodic coherent vortex shedding. Early detection and close monitoring of combustion instability are the keys to extending the remaining useful life (RUL) of any gas turbine engine. However, such impending instability to a stable combustion is extremely difficult to detect only from pressure data due to its sudden (bifurcationtype) nature. Toolchains that are able to detect early instability occurrence have transformative impacts on the safety and performance of modern engines. This paper proposes an endto- end deep convolutional selective autoencoder approach to capture the rich information in hi-speed flame video for instability prognostics. In this context, an autoencoder is trained to selectively mask stable flame and allow unstable flame image frames. Performance comparison is done with a wellknown image processing tool, conditional random field that is trained to be selective as well. In this context, an informationtheoretic threshold value is derived. The proposed framework is validated on a set of real data collected from a laboratory scale combustor over varied operating conditions where it is shown to effectively detect subtle instability features as a combustion process makes transition from stable to unstable region.}, number = {4}, urldate = {2022-01-26}, journal = {International Journal of Prognostics and Health Management}, author = {Akintayo, Adedotun and Gwn Lore, Kin and Sarkar, Soumalya and Sarkar, Soumik}, month = nov, year = {2020}, file = {Full Text:C\:\\Users\\niebl\\Zotero\\storage\\TK5G2IWA\\Akintayo et al. - 2020 - Prognostics of Combustion Instabilities from Hi-sp.pdf:application/pdf}, } @article{MerkBusch22a, title = {The {Nonlinear} {Thermoacoustic} {Eigenvalue} {Problem} and {Its} {Rational} {Approximations}: {Assessment} of {Solution} {Strategies}}, volume = {145}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4055583}, language = {en}, number = {2}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Merk, Moritz and Buschmann, Philip E. and Moeck, Jonas P. and Polifke, Wolfgang}, month = feb, year = {2023}, keywords = {MediaTUM}, pages = {021028}, file = {Merk et al. - 2022 - The Nonlinear Thermoacoustic Eigenvalue Problem an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\33VHFEI3\\Merk et al. - 2022 - The Nonlinear Thermoacoustic Eigenvalue Problem an.pdf:application/pdf}, } @mastersthesis{Peixo22, title = {Optimization of {Reduced} {Reaction} {Mechanisms} for {CFD} {Simulations} of {Methane}/{Hydrogen} {Flames} {Under} {Modern} {Gas} {Turbine} {Conditions}}, school = {TU München}, author = {Peixoto, José}, month = oct, year = {2022}, note = {Betreuer: Bonnaire}, file = {Peixoto - 2022 - Optimization of Reduced Reaction Mechanisms for CF.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YDA63Y3U\\Peixoto - 2022 - Optimization of Reduced Reaction Mechanisms for CF.pdf:application/pdf}, } @phdthesis{Mulle22, type = {Bachelor {Thesis}}, title = {Reduction and {Optimization} of {Reaction} {Mechanisms} for {Methane}-{Hydrogen} {Fuel} {Blends}}, school = {TU München}, author = {Müller, Felix}, month = nov, year = {2022}, note = {Betreuer: Bonnaire}, file = {Mulle22 Presentation:C\:\\Users\\niebl\\Zotero\\storage\\8FTDWJBP\\Mulle22 Presentation.pdf:application/pdf;Müller - 2022 - Reduction and Optimization of Reaction Mechanisms .pdf:C\:\\Users\\niebl\\Zotero\\storage\\HFK6PSPH\\Müller - 2022 - Reduction and Optimization of Reaction Mechanisms .pdf:application/pdf}, } @article{GarciLeBr22, title = {Large eddy simulation of the dynamics of lean premixed flames using global reaction mechanisms calibrated for {CH4}-{H2} fuel blends}, volume = {34}, doi = {10.1063/5.0098898}, language = {en}, number = {9}, journal = {Physics of Fluids}, author = {Garcia, A. M. and Le Bras, S. and Prager, J. and Haeringer, M. and Polifke, W.}, year = {2022}, note = {tex.ids= GarciLeBr22}, keywords = {archived, MediaTUM}, pages = {095105}, file = {Garcia et al. - 2022 - Large eddy simulation of the dynamics of lean prem.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RKJTYB6A\\Garcia et al. - 2022 - Large eddy simulation of the dynamics of lean prem.pdf:application/pdf}, } @article{TathaSilva23, title = {Physical {Quantities} {Reconstruction} in {Reacting} {Flows} with {Deep} {Learning}}, volume = {265}, doi = {10.3397/IN_2022_0235}, abstract = {Performing measurements in reacting flows is a challenging task due to the complexity of measuring all quantities of interest simultaneously or limitations in the optical access. To compensate for this, recent advances in deep learning have shown a strong potential in augmenting the information content in datasets composed of partial measurements by reconstructing the quantities that could not be measured. The present work analyses the use of such deep learning tools for the reconstruction of quantities in two different cases. First, Convolutional Neural Networks (CNNs) are used to reconstruct the heat release rate (HRR) from velocity measurements in a methane/air premixed flame under harmonic excitation. The CNNs are trained from complete datasets at some specific frequencies and amplitudes of excitation and their ablility to reconstruct the HRR for different operating conditions with good accuracy is demonstrated. Secondly, an alternate approach based on Physics-Informed Neural Networks that do not require the training data to have all the quantities is explored. It is applied to a puffing pool fire where the velocity field is reconstructed from observations of pressure, temperature and density with good accuracy. Both approaches are also shown to be robust with respect to noise.}, number = {6}, journal = {INTER-NOISE and NOISE-CON Congress and Conference Proceedings}, author = {Tathawadekar, Nilam and Silva, Camilo and Sitte, Philip and Doan, Nguyen Anh Khoa}, month = feb, year = {2023}, keywords = {published}, pages = {1645--1656}, file = {Tathawadekar et al. - 2023 - Physical Quantities Reconstruction in Reacting Flo.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VTDU72VL\\Tathawadekar et al. - 2023 - Physical Quantities Reconstruction in Reacting Flo.pdf:application/pdf}, } @misc{polifke_fundamentals_2023, title = {Fundamentals of thermodynamics to tackle the challenge of sustainability}, author = {Polifke, Wolfgang}, year = {2023}, } @inproceedings{KaiseZhang22, address = {Indianapolis, Indiana, USA}, title = {Linearizing a reacting turbulent jet flow: {How} to do it, and how not to}, url = {https://meetings.aps.org/Meeting/DFD22/Session/J18.1}, booktitle = {75th {APS}/{DFD} {Annual} {Meeting}}, author = {Kaiser, Thomas Ludwig and Zhang, Feichi and Zirwes, Thorsten and Varillon, Grégoire and Polifke, Wolfgang and Oberleithner, Kilian}, year = {2022}, keywords = {published online}, } @inproceedings{GenteFisch03, address = {Hilton Head, SC, USA}, title = {Acoustic transfer matrix reconstruction and analysis for ducts with sudden change of area}, doi = {10.2514/6.2003-3142}, booktitle = {9th {AIAA}/{CEAS} aeroacoustics conference and exhibit}, publisher = {American Institute of Aeronautics and Astronautics}, author = {Gentemann, Alexander and Fischer, Andreas and Evesque, Stephanie and Polifke, Wolfgang}, year = {2003}, file = {Gentemann et al. - 2003 - Acoustic transfer matrix reconstruction and analys.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BWM97MNU\\Gentemann et al. - 2003 - Acoustic transfer matrix reconstruction and analys.pdf:application/pdf}, } @article{AvdonJavar19a, title = {Prediction of premixed flame dynamics using {LES} with tabulated chemistry and {Eulerian} stochastic fields}, volume = {141}, doi = {10.1115/GT2019-90140}, number = {11}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Avdonin, A. and Javareshkian, A. and Polifke, W.}, year = {2019}, keywords = {published, MediaTUM}, pages = {111024}, file = {Avdonin et al_2019_Prediction of premixed flame dynamics.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IQIB76PF\\Avdonin et al_2019_Prediction of premixed flame dynamics.pdf:application/pdf}, } @phdthesis{Gregg22, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {On {Acoustic} {Waves} in {2D}}, school = {TU München}, author = {Gregg-Smith, Benjamin}, month = dec, year = {2022}, note = {Betreuer: Alexander Eder/Camilo Silva}, file = {Gregg-Smith - 2022 - On Acoustic Waves in 2D.pdf:C\:\\Users\\niebl\\Zotero\\storage\\T36FRQAY\\Gregg-Smith - 2022 - On Acoustic Waves in 2D.pdf:application/pdf}, } @inproceedings{FollePolif11, address = {Rio de Janeiro, Brazil}, title = {Advances in {Identification} {Techniques} for {Aero}-{Acoustic} {Scattering} {Coefficients} from {Large} {Eddy} {Simulation}}, volume = {4}, isbn = {978-1-61839-259-6}, booktitle = {18th {International} {Congress} on {Sound} and {Vibration}}, publisher = {International Institute of Acoustics \& Vibration}, author = {Föller, Stephan and Polifke, Wolfgang}, year = {2011}, keywords = {Low order model, Acoustics, Frequency response}, pages = {3122--3129}, file = {Foeller_Polifke_2011_Advances in Identification Techniques for Aero-Acoustic Scattering Coefficients.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8BGTW7CM\\Foeller_Polifke_2011_Advances in Identification Techniques for Aero-Acoustic Scattering Coefficients.pdf:application/pdf}, } @inproceedings{NieblBonna22, title = {Towards reconstruction of acoustic fields via physics-informed neural networks}, doi = {10.3397/IN_2022_0690}, booktitle = {{INTER}-{NOISE} and {NOISE}-{CON} {Congress} and {Conference} {Proceedings}}, author = {Niebler, Korbinian and Bonnaire, Philip and Doan, Anh Khoa and Silva, Camilo F.}, year = {2022}, keywords = {archived, MediaTUM, machine learning}, file = {Niebler et al. - 2022 - Towards reconstruction of acoustic fields via phys.pdf:C\:\\Users\\niebl\\Zotero\\storage\\LDW7LT5C\\Niebler et al. - 2022 - Towards reconstruction of acoustic fields via phys.pdf:application/pdf}, } @inproceedings{scoletta_impact_2022, address = {Glasgow, Scotland}, series = {{IN2022}\_Paper\_Ab933}, title = {Impact of stretch on the flame dynamics of laminar premixed flames}, doi = {10.3397/IN_2022_0933}, booktitle = {{INTER}-{NOISE} and {NOISE}-{CON} {Congress} and {Conference} {Proceedings}}, author = {Scoletta, Edoardo and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {579}, file = {Scoletta and Polifke - Impact of stretch on the flame dynamics of laminar.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8HZV3LKW\\Scoletta and Polifke - Impact of stretch on the flame dynamics of laminar.pdf:application/pdf}, } @phdthesis{Fisch04, address = {München, Germany}, type = {{PhD} {Thesis}}, title = {Hybride, thermoakustische {Charakterisierung} von {Drallbrennern}}, school = {TU München}, author = {Fischer, Andreas}, month = apr, year = {2004}, keywords = {Combustion, Thermo-acoustics, Premixed flame, Frequency response}, file = {Fischer_2004_Hybride, thermoakustische Charakterisierung von Drallbrennern.pdf:C\:\\Users\\niebl\\Zotero\\storage\\C3K6TQC6\\Fischer_2004_Hybride, thermoakustische Charakterisierung von Drallbrennern.pdf:application/pdf}, } @phdthesis{Kulka23, address = {Garching}, type = {Semester {Thesis}}, title = {Study on {Pseudo} {Time}-{Stepping} in {LES} with {Conjugate} {Heat} {Transfer} in the {Context} of {Confined} {Turbulent} {Flames}}, school = {TU München}, author = {Kulkarni, Akshay}, month = mar, year = {2023}, note = {Betreuer: Marcel Désor/Alexander Eder}, file = {Kulkarni - 2023 - Study on Pseudo Time-Stepping in LES with Conjugat.pdf:C\:\\Users\\niebl\\Zotero\\storage\\L4MYG7UC\\Kulkarni - 2023 - Study on Pseudo Time-Stepping in LES with Conjugat.pdf:application/pdf}, } @article{KopitPolif08, title = {{CFD}-based application of the {Nyquist} criterion to thermo-acoustic instabilities}, volume = {227}, issn = {00219991}, doi = {10.1016/j.jcp.2008.03.022}, language = {en}, number = {14}, journal = {Journal of Computational Physics}, author = {Kopitz, J. and Polifke, W.}, month = jul, year = {2008}, keywords = {Thermo-acoustics, Instability, Control theory, CFD}, pages = {6754--6778}, file = {Kopitz_Polifke_2008_ CFD -based Application of the Nyquist Criterion to Thermo-Acoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BGPIU95D\\Kopitz_Polifke_2008_ CFD -based Application of the Nyquist Criterion to Thermo-Acoustic.pdf:application/pdf;Kopitz_Polifke_2008_CFD-based Application of the Nyquist Criterion to Thermo-Acoustic Instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GJ85ZS26\\Kopitz_Polifke_2008_CFD-based Application of the Nyquist Criterion to Thermo-Acoustic Instabilities.pdf:application/pdf}, } @inproceedings{FournHaeri20, address = {Virtual, Online}, title = {Low-{Order} {Modeling} to {Investigate} {Clusters} of {ITA} {Modes} in {Annular} {Combustors}}, volume = {Volume 4B: Combustion, Fuels, and Emissions}, isbn = {978-0-7918-8413-3}, doi = {10.1115/GT2020-15985}, booktitle = {{ASME} {Turbo} {Expo} 2020: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Fournier, Guillaume J. J. and Haeringer, Matthias and Silva, Camilo F. and Polifke, Wolfgang}, month = sep, year = {2020}, keywords = {published, archived, MediaTUM}, pages = {V04BT04A031}, file = {Fournier et al. - 2020 - Low-Order Modeling to Investigate Clusters of ITA .pdf:C\:\\Users\\niebl\\Zotero\\storage\\YVUF7F3I\\Fournier et al. - 2020 - Low-Order Modeling to Investigate Clusters of ITA .pdf:application/pdf}, } @inproceedings{HaeriFourn20, address = {Virtual, Online}, title = {A {Strategy} to {Tune} {Acoustic} {Terminations} of {Single}-{Can} {Test}-{Rigs} to {Mimic} {Thermoacoustic} {Behavior} of a {Full} {Engine}}, volume = {Volume 4B: Combustion, Fuels, and Emissions}, isbn = {978-0-7918-8413-3}, doi = {10.1115/GT2020-16078}, booktitle = {{ASME} {Turbo} {Expo} 2020: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Haeringer, Matthias and Fournier, Guillaume J. J. and Meindl, Max and Polifke, Wolfgang}, month = sep, year = {2020}, keywords = {MediaTUM}, pages = {V04BT04A031}, file = {Haeringer et al. - 2020 - A Strategy to Tune Acoustic Terminations of Single.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4TK5FEKC\\Haeringer et al. - 2020 - A Strategy to Tune Acoustic Terminations of Single.pdf:application/pdf}, } @inproceedings{FournMeind21, address = {Virtual, Online}, title = {Low-{Order} {Modeling} of {Can}-{Annular} {Combustors}}, volume = {Volume 3A: Combustion, Fuels, and Emissions}, isbn = {978-0-7918-8494-2}, doi = {10.1115/GT2021-58947}, booktitle = {{ASME} {Turbo} {Expo} 2021: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Fournier, Guillaume J. J. and Meindl, Max and Silva, Camilo F. and Ghirardo, Giulio and Bothien, Mirko R. and Polifke, Wolfgang}, month = jun, year = {2021}, keywords = {MediaTUM}, pages = {V03AT04A027}, file = {Fournier et al_2021_Low-Order Modeling of Can-Annular Combustors.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JXNSSQHX\\Fournier et al_2021_Low-Order Modeling of Can-Annular Combustors.pdf:application/pdf}, } @inproceedings{FournSchae22, address = {Rotterdam, Netherlands}, title = {Interplay of {Clusters} of {Acoustic} and {Intrinsic} {Thermoacoustic} {Modes} in {Can}-{Annular} {Combustors}}, volume = {Volume 3A: Combustion, Fuels, and Emissions}, isbn = {978-0-7918-8599-4}, doi = {10.1115/GT2022-80785}, language = {en}, booktitle = {{ASME} {Turbo} {Expo} 2022: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Fournier, Guillaume J. J. and Schaefer, Felicitas and Haeringer, Matthias and Silva, Camilo F. and Polifke, Wolfgang}, month = jun, year = {2022}, keywords = {published, archived, MediaTUM}, pages = {V03AT04A026}, file = {Fournier et al. - 2022 - Interplay of Clusters of Acoustic and Intrinsic Th.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UYJ8N7U8\\Fournier et al. - 2022 - Interplay of Clusters of Acoustic and Intrinsic Th.pdf:application/pdf}, } @mastersthesis{Komar04, address = {München, Germany}, title = {Investigation of {Combustion} {Instabilities} in a {Premixed} {Swirl} {Burner}}, author = {Komarek, Th.}, year = {2004}, annote = {Lehrstuhl fur thermodynamik}, annote = {The following values have no corresponding Zotero field:JF - Diploma Thesis}, } @article{GuoSilva20b, title = {A {Gaussian}-{Process}-based framework for high-dimensional uncertainty quantification analysis in thermoacoustic instability prediction}, volume = {38}, url = {https://www.sciencedirect.com/science/article/pii/S1540748920303217?via%3Dihub}, doi = {10.1016/j.proci.2020.06.229}, number = {4}, journal = {Proceedings of the Combustion Institute}, author = {Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang and Yong, Kah J.}, month = jan, year = {2021}, keywords = {MediaTUM}, pages = {6251--6259}, file = {Guo et al_2021_A Gaussian-Process-based framework for.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QX2L2CAY\\Guo et al_2021_A Gaussian-Process-based framework for.pdf:application/pdf}, } @article{WangKaise22, title = {Linear instability of a premixed slot flame: flame transfer function and resolvent analysis}, volume = {240}, doi = {10.1016/j.combustflame.2022.112016}, abstract = {The global response to forcing of a 2D laminar premixed slot flame is investigated with a linearized approach, where multi-physics coupling in a non-parallel reacting flow is accounted for. The classical flame transfer functions obtained this way are in good agreement with nonlinear reference calculations, performed with the AVBP code from CERFACS. Optimal forcing input, leading to maximal heat release fluctuations, are identified via resolvent analysis. Compared to similar recent investigations, we use a finite-element discretization on an unstructured mesh, and we employ a reduced two-step scheme for methane-air reaction. Strong sensitivity to flame parameters and chemical modeling is observed. The present linear analysis opens new ways for the physical discussion of instability dynamics in flames.}, journal = {Comb. \& Flame}, author = {Wang, Chuhan and Kaiser, Thomas Ludwig and Meindl, Max and Oberleithner, Kilian and Polifke, Wolfgang and Lesshafft, Lutz}, year = {2022}, keywords = {MediaTUM}, pages = {112016}, file = {Wang et al_2022_Linear instability of a premixed slot.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FWXWQCET\\Wang et al_2022_Linear instability of a premixed slot.pdf:application/pdf}, } @inproceedings{wang_identification_2020, address = {Chicago}, title = {Identification of optimal linear perturbations in a premixed laminar flame by global resolvent analysis}, url = {https://meetings.aps.org/Meeting/DFD20/Session/H08}, abstract = {The global response to forcing of a 2D laminar premixed slot flame is investigated with a linearized approach, where multi-physics coupling in a non-parallel reacting flow is accounted for. The classical flame transfer functions obtained this way are in good agreement with nonlinear reference calculations, performed with the AVBP code from CERFACS. Optimal forcing input, leading to maximal heat release fluctuations, are identified via resolvent analysis. Compared to similar recent investigations, we use a finite-element discretization on an unstructured mesh, and we employ a reduced two-step scheme for methane-air reaction. Strong sensitivity to flame parameters and chemical modeling is observed. The present linear analysis opens new ways for the physical discussion of instability dynamics in flames.}, booktitle = {Bulletin of the {American} {Physical} {Society}}, publisher = {APS}, author = {Wang, Chuhan and Kaiser, Thomas Ludwig and Meindl, Max and Oberleithner, Kilian and Polifke, Wolfgang and Lesshafft, Lutz}, month = nov, year = {2020}, keywords = {MediaTUM}, file = {Wang et al. - 2020 - APS Presentation:C\:\\Users\\niebl\\Zotero\\storage\\FMIPV676\\Wang et al. - 2020 - APS Presentation.pdf:application/pdf;Wang et al. - 2020 - Identification of optimal linear perturbations in .pdf:C\:\\Users\\niebl\\Zotero\\storage\\XTD8NCFF\\Wang et al. - 2020 - Identification of optimal linear perturbations in .pdf:application/pdf}, } @inproceedings{DouglPolif22a, address = {Athens, Greece}, title = {Effect of {Lewis} number on the linear stability of jet flames}, abstract = {Ongoing concerns about combustion-related greenhouse gas emissions have motivated substantial efforts towards integrating carbon-free alternative fuels such as hydrogen (H2) into existing energy infrastructure. Nonetheless, H2 is characterised by remarkably high mass diffusion rates (low Lewis numbers), giving its flames extreme sensitivity to stretch effects and thermal-diffusive instability1. These flame dynamics are also intimately coupled to the hydrodynamic properties of the flow within which the flame is embedded. While these flame and flow dynamics are both mature areas of research when considered separately, relatively little is known about their behaviour when coupled interactions are included.}, booktitle = {14th {European} {Fluid} {Mechanics} {Conference} ({EFMC14})}, author = {Douglas, Christopher M. and Polifke, Wolfgang and Lesshafft, Lutz}, month = sep, year = {2022}, keywords = {published}, annote = {Presentation only, no paper }, file = {Douglas et al_2022_Effect of Lewis number on the linear.doc:C\:\\Users\\niebl\\Zotero\\storage\\P6VCQ4RP\\Douglas et al_2022_Effect of Lewis number on the linear.doc:application/msword;Douglas et al. - 2022 - Effect of Lewis number on the linear stability of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SP368ZZU\\Douglas et al. - 2022 - Effect of Lewis number on the linear stability of.pdf:application/pdf}, } @inproceedings{DouglPolif22, address = {Cadiz, France}, title = {The effect of the {Lewis} number on the linear instability of jet flames}, booktitle = {14th {ERCOFTAC} {SIG} 33 {Workshop}}, author = {Douglas, Christopher M. and Polifke, Wolfgang and Lesshafft, Lutz}, year = {2022}, keywords = {MediaTUM}, annote = {N.B.: nur Vortrag, kein Paper Lutz, Juni ‘22 … die Resonanz war sehr gut, speziell auch unser Strouhal scaling der forcing norm hat ein paar Leute interessiert. }, file = {Douglas et al_2022_The effect of the Lewis number on the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I9EILXNJ\\Douglas et al_2022_The effect of the Lewis number on the.pdf:application/pdf}, } @article{DouglPolif23, title = {Flash-back, blow-off, and symmetry breaking of premixed conical flames}, volume = {258}, doi = {10.1016/j.combustflame.2023.113060}, journal = {Comb. \& Flame}, author = {Douglas, Christopher M. and Polifke, Wolfgang and Lesshafft, Lutz}, year = {2023}, keywords = {MediaTUM}, file = {Douglas et al_2023_Flash-back, blow-off, and symmetry.pdf:C\:\\Users\\niebl\\Zotero\\storage\\C5H9MEIF\\Douglas et al_2023_Flash-back, blow-off, and symmetry.pdf:application/pdf}, } @inproceedings{douglas_effect_2022, address = {USA}, title = {Effect of differential diffusion on the linear dynamics of premixed flames in swirling jets}, abstract = {Hydrogen's exceptionally low molecular weight causes its ratio of thermal to mass diffusivity (the Lewis number) to be less than one in lean flames. This property leads to a phenomenon known as thermal-diffusive instability, which is expected to have a significant impact on the response of hydrogen flames to flow disturbances. Recently, we have used modal and nonmodal stability analysis to show how such differential diffusion influences the linear dynamics of laminar Bunsen flames (EFMC, Athens, Sept. 2022). We now extend those results to swirling jet flames in order to explore how non-unity Lewis number effects interact with swirl. A low-Mach, single-step reacting flow model is used to study the three-dimensional linear flame dynamics via eigenmode and resolvent analysis, at a variety of swirl and Lewis numbers. The results reveal that swirl has a significant destabilizing influence on the flame behavior regardless of the Lewis number. However, the combination of swirl with differential diffusion leads to far greater nonmodal amplification of flow disturbances at low Lewis numbers compared to unity Lewis number flames. The implications of these findings towards the fundamental behaviors of lean-premixed hydrogen flames and their thermoacoustic stability characteristics is discussed.}, booktitle = {75th {APS}/{DFD} {Annual} {Meeting}}, author = {Douglas, Christopher M. and Polifke, Wolfgang and Lesshafft, Lutz}, month = nov, year = {2022}, keywords = {MediaTUM}, file = {Douglas et al_2022_Effect of differential diffusion on the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\72RQ5AVN\\Douglas et al_2022_Effect of differential diffusion on the.pdf:application/pdf;Douglas_APSDFD_2022.pdf:C\:\\Users\\niebl\\Zotero\\storage\\U4F8G5QB\\Douglas_APSDFD_2022.pdf:application/pdf}, } @inproceedings{BrokoVaril23, title = {Towards a {Momentum} {Potential} {Theory} for {Reacting} {Flows}}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}: {Industry} meets {Academia} ({SoTiC} 2023)}, author = {Brokof, Philipp and Varillon, Grégoire and Inoue, Vasuhiko and {Polifke, Wolfgang}}, year = {2023}, keywords = {published, archived, MediaTUM}, file = {Brokof and Varillon - 2023 - Towards a Momentum Potential Theory for Reacting F.pdf:C\:\\Users\\niebl\\Zotero\\storage\\E26EXFEL\\Brokof and Varillon - 2023 - Towards a Momentum Potential Theory for Reacting F.pdf:application/pdf}, } @phdthesis{knebel_florian_approaches_2023, address = {München}, type = {Bachelor {Thesis}}, title = {Approaches to {Improve} the {Frequency} {Response} of {Multi}-{Layer} {Perceptrons} as {Flame} {Models}}, abstract = {Thermoacoustic instability is a serious obstacle in the construction of combustion systems. Numerous modeling approaches exist in the litera- ture. A recent strategy is to force a CFD simulation of the burner’s flame region with a broadband velocity signal. Then, a neural network is trained on the generated data to obtain a low order model of the flame from just one CFD simulation. The trained neural network can then be integrated into a model of the acoustic environment to predict the limit cycle am- plitude and frequency spectrum. Because the computational cost is low once the network is trained, the limit cycle behavior can be cheaply deter- mined for many versions of the acoustic environment to find an optimal configuration. In this work, ways to improve the frequency domain be- havior (flame describing function and harmonic content) of a multi-layer perceptron architecture are investigated. Negative effects of dropout reg- ularization in the last layer on the harmonic content are demonstrated. Additional loss terms to enforce the unit gain condition of the flame de- scribing function (FDF) are deduced from energy conservation and tested. To correct overshooting FDF gain values of the neural networks, a loss term to inform the network about one predetermined FDF gain is suc- cessfully introduced. Together with a term to achieve unit gain for low frequencies, the FDF can be improved considerably. As a consequence, the training set length can be reduced while preserving correct FDFs with acceptably low uncertainty.}, language = {en}, school = {Technische Universität München}, author = {Knebel, Florian}, month = jan, year = {2023}, note = {Supervisor: Rywik}, file = {_.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4X3WCC3G\\_.pdf:application/pdf}, } @inproceedings{Tay-WScarp17, address = {Charlotte, NC, USA}, title = {{LES} {Combustion} {Model} with {Stretch} and {Heat} {Loss} {Effects} for {Prediction} of {Premix} {Flame} {Characteristics} and {Dynamics}}, volume = {Volume 4A: Combustion, Fuels and Emissions}, doi = {10.1115/GT2017-63357}, booktitle = {{ASME} {Turbo} {Expo} 2017: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Tay-Wo-Chong, Luis and Scarpato, Alessandro and Polifke, Wolfgang}, year = {2017}, note = {tex.ids= Tay-WScarp17a}, keywords = {MediaTUM}, pages = {V04AT04A029}, annote = {BRS Case }, annote = {should have cited Carbonell et all, 2009 for enthalpy defect flamelets}, file = {Tay-Wo-Chong et al_2017_LES Combustion Model with Stretch and Heat Loss Effects for Prediction of.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I4U5KFUH\\Tay-Wo-Chong et al_2017_LES Combustion Model with Stretch and Heat Loss Effects for Prediction of.pdf:application/pdf}, } @book{law_data_2015, address = {Cham Heidelberg New York Dordrecht London}, edition = {1st ed. 2015 Edition}, title = {Data {Assimilation}: {A} {Mathematical} {Introduction}}, isbn = {978-3-319-20324-9}, shorttitle = {Data {Assimilation}}, abstract = {This book provides a systematic treatment of the mathematical underpinnings of work in data assimilation, covering both theoretical and computational approaches. Specifically the authors develop a unified mathematical framework in which a Bayesian formulation of the problem provides the bedrock for the derivation, development and analysis of algorithms; the many examples used in the text, together with the algorithms which are introduced and discussed, are all illustrated by the MATLAB software detailed in the book and made freely available online.The book is organized into nine chapters: the first contains a brief introduction to the mathematical tools around which the material is organized; the next four are concerned with discrete time dynamical systems and discrete time data; the last four are concerned with continuous time dynamical systems and continuous time data and are organized analogously to the corresponding discrete time chapters.This book is aimed at mathematical researchers interested in a systematic development of this interdisciplinary field, and at researchers from the geosciences, and a variety of other scientific fields, who use tools from data assimilation to combine data with time-dependent models. The numerous examples and illustrations make understanding of the theoretical underpinnings of data assimilation accessible. Furthermore, the examples, exercises and MATLAB software, make the book suitable for students in applied mathematics, either through a lecture course, or through self-study.}, language = {English}, publisher = {Springer}, author = {Law, Kody and Stuart, Andrew and Zygalakis, Konstantinos}, month = sep, year = {2015}, note = {tex.ids= LawStuar15a}, file = {(Texts in Applied Mathematics 62) Kody Law, Andrew Stuart, Konstantinos Zygalakis-Data Assimilation_ A Mathematical Introduction-Springer International Publishing (2015).pdf:C\:\\Users\\niebl\\Zotero\\storage\\XIBCKUN5\\(Texts in Applied Mathematics 62) Kody Law, Andrew Stuart, Konstantinos Zygalakis-Data Assimilation_ A Mathematical Introduction-Springer International Publishing (2015).pdf:application/pdf;Law et al. - 2015 - Data Assimilation A Mathematical Introduction.PDF:C\:\\Users\\niebl\\Zotero\\storage\\2XGDYNMU\\Law et al. - 2015 - Data Assimilation A Mathematical Introduction.PDF:application/pdf;Snapshot:C\:\\Users\\niebl\\Zotero\\storage\\HJVVCBQY\\9783319203249.html:text/html}, } @inproceedings{TathaOsun23, address = {Zurich, Switzerland}, title = {Linear and nonlinear flame response prediction of turbulent flames using neural network models}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}}, author = {Tathawadekar, Nilam and Ösün, Alper and Eder, Alexander J. and Silva, Camilo F. and Thuerey, Nils}, year = {2023}, keywords = {MediaTUM}, file = {Tathawadekar et al. - 2023 - Linear and nonlinear flame response prediction of .pdf:C\:\\Users\\niebl\\Zotero\\storage\\ICHCGHGL\\Tathawadekar et al. - 2023 - Linear and nonlinear flame response prediction of .pdf:application/pdf}, } @inproceedings{polifke_intrinsic_2022, address = {Online}, title = {Intrinsic thermoacoustic feedback and its consequences for combustion noise and combustion dynamics}, url = {https://youtu.be/h1vozr3AJ4U}, abstract = {Thermoacoustic combustion instabilities represent a severe challenge for the development and reliable operation of efficient, flexible and low-emission combustion technology in gas turbines and rocket engines as well as industrial or domestic burners. Traditionally, thermoacoustic modes were understood to be associated with acoustic cavity modes of the combustion system. The discovery of the intrinsic thermoacoustic (ITA) feedback loop and associated eigenmodes shattered this paradigm: the complete set of eigenmodes of a combustor is now understood to be the aggregate of acoustic and ITA modes. In this talk I will first reminisce from a personal perspective about the studies that led to the discovery of ITA feedback and ITA modes. Then I will present the current understanding of the structure and characteristic properties of ITA modes before exploring consequences of ITA feedback, such as convective scaling of thermoacoustic eigenfrequencies, resonant amplification of combustion noise, clusters of modes in annular and can-annular combustors, and exceptional points.}, booktitle = {The {Combustion} {Webinar}}, publisher = {Combustion Institute}, author = {Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, annote = {Sun Wenting, wenting.sun@aerospace.gatech.edu All the video recordings are posted under the Combustion Webinar Youtube channel, and here is the link: https://www.youtube.com/watch?v=h1vozr3AJ4U }, file = {Polifke_2022_Intrinsic thermoacoustic feedback and.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BYKDBKGA\\Polifke_2022_Intrinsic thermoacoustic feedback and.pdf:application/pdf}, } @inproceedings{polifke_thermoacoustic_2021, address = {Online}, title = {Thermoacoustic stability of hydrogen flames - same same, but different?}, booktitle = {{ASME} {Turbo} {Expo} 2021: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Polifke, Wolfgang}, year = {2021}, } @inproceedings{polifke_hydrogen_2022, address = {online Webinar}, title = {Hydrogen combustion and thermoacoustic instabilities}, url = {Annual Meeting of the Linné FLOW Centre}, booktitle = {Indo-{German} collaboration on green hydrogen}, author = {Polifke, Wolfgang}, year = {2022}, keywords = {published}, annote = {invited lecture Contacts: rajeshsadanandan@iist.ac.in sumit.agarwal@ptb.de }, } @inproceedings{RywikdaCr22, title = {Investigating inconsistent uncertainty quantification in neural network models of nonlinear flame response}, url = {https://www.ingentaconnect.com/content/ince/incecp/2023/00000265/00000001/art00022}, doi = {10.3397/IN_2022_0921}, abstract = {Neural network models, thanks to their flexibility and ability to approximate any function, are gaining popularity across all research fields. In thermoacoustics, one of their applications is modelling of a nonlinear flame response, learned from a single broadband forcing time series obtained through a computational fluid dynamics simulation. However, the investigations on this flame modelling approach conducted by Jaensch et al. [1] and Tathawadekar et al. [2] report contradictory results, concerning the performance and uncertainty of the derived multi-layer perceptron networks, despite using identical training data. This paper reevaluates their findings and aims to reconcile the opposing conclusions. This work demonstrates the reason for the different network performances, by reviewing the data split policies and identifying shuffling as a detrimental factor. Additionally, in this study different regularisation techniques such as L1 and L2 regularisation as well as network size reduction are considered. Those are compared against the previously tested implementation of dropout [2], which was believed to be responsible for the difference in the results between the two studies.}, language = {en}, booktitle = {{INTER}-{NOISE} and {NOISE}-{CON} {Congress} and {Conference} {Proceedings}}, author = {Rywik, Marcin and da Cruz, David Sören and Polifke, Wolfgang}, year = {2022}, keywords = {MediaTUM}, pages = {1}, file = {Rywik et al. - Investigating inconsistent uncertainty quantification encountered in neural network modelling of nonlinear response of a laminar flame.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9ZVWT7PH\\Rywik et al. - Investigating inconsistent uncertainty quantification encountered in neural network modelling of nonlinear response of a laminar flame.pdf:application/pdf}, } @article{RywikZimme23a, title = {Spatially resolved modeling of the nonlinear dynamics of a laminar premixed flame with a multilayer perceptron - convolution autoencoder network}, volume = {146}, doi = {10.1115/1.4063788}, abstract = {This work presents a multilayer perceptron-convolutional autoencoder (MLP-CAE) neural network model, which accurately predicts the two-dimensional flame field dynamics of an acousti- cally excited premixed laminar flame. The obtained architecture maps the acoustic perturbation time series to a spatially dis- tributed heat release rate field, capturing the flame lengths and shapes. This extends to previous neural network models, which predicted only the field-integrated value of the heat release rate. The MLP-CAE comprises two sub-models: a fully connected MLP and a CAE. The key idea behind the CAE network is to find a lower dimensional latent space representation of the heat release rate field. The MLP is responsible for modeling the flame dynamics by transforming the acoustic forcing signal into this latent space, enabling the decoder to produce the flow field distributions. To train the MLP-CAE, computational fluid dynamics (CFD) flame simulations with a broadband acoustic forcing were used. Its nor- malized amplitude was set to 0.5 and 1.0, resulting in a nonlinear flame response. The network was found to accurately predict the perturbed flame shapes - both under broadband and har- monic forcing. Additionally, it conserved the correct frequency response characteristics as verified by the global and local flame describing functions. The MLP-CAE provides a building block towards a potential shift away from a purely ’0D’ analysis with the assumption of acoustic compactness of the flame. When com- bined with an acoustic network, the generated flame fields could provide more physical insight in the thermoacoustic dynamics of combustion chambers. Those capabilities do not come at an additional significant computational cost, as even the previous nonspatial flame models had to train on the CFD data, which readily included field distributions.}, language = {en}, number = {6}, journal = {J. Eng. for Gas Turbines and Power}, author = {Rywik, Marcin and Zimmermann, Axel and Eder, Alexander J. and Scoletta, Edoardo and Polifke, Wolfgang}, year = {2024}, keywords = {MediaTUM}, pages = {061009}, file = {Rywik and Zimmermann - 2023 - Spatially resolved modeling of the nonlinear dynam.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WIWI3XWH\\Rywik and Zimmermann - 2023 - Spatially resolved modeling of the nonlinear dynam.pdf:application/pdf}, } @article{PurwaPolif23, title = {Preserving {Transfer}-behavior in {Model} {Order} {Reduction} for {Thermoacoustic} {Stability} {Analysis}}, volume = {565}, url = {https://www.sciencedirect.com/science/article/pii/S0022460X23003115}, doi = {10.1016/j.jsv.2023.117862}, number = {2}, journal = {J. Sound and Vibration}, author = {Purwar, Naman and Polifke, Wolfgang}, year = {2023}, keywords = {MediaTUM}, pages = {117862}, file = {PurwaPolif23_JSV.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HYXT7XLQ\\PurwaPolif23_JSV.pdf:application/pdf}, } @article{RywikKasth22, title = {Turbulence and {Heat} {Release} {Rate} {Network} {Structure} in {Hydrogen}-{Enriched} {Combustion}}, volume = {39}, doi = {10.1016/j.proci.2022.08.053}, abstract = {Complex network theory is used to analyze the spatiotemporal dynamics of thermoacoustic instability of the PRECCINSTA swirl burner, operating on hydrogen-methane fuel blends. At a power setting of 15 kW with equivalence ratio of 0.8 and hydrogen fuel fraction (HFF) ranging from 0\% to 80\%, period-1 and period-2 limit cycle oscillations in addition to chaotic oscillations were observed. A turbulence network was constructed from the vorticity data obtained with particle image velocimetry. In addition, a heat release rate (HRR) correlation network was constructed from chemiluminescence images. Although the two networks concern a common thermoacoustic system, both exhibit significant differences: the turbulence network exhibits power law degree distribution, maintains small world property for all HFFs and is scale-free only in the absence of hydrogen enrichment. The HRR correlation network does not feature these properties, but hints at an asymmetric coupling between the heat release rate and the acoustic pressure for all HFFs. Furthermore, the HRR network is responsive to changes in HFF and the corresponding shifts in the dynamical state as well as in the root-mean-square of acoustic pressure. On the contrary, the turbulence network displays no such sensitivity and its properties are almost constant in the upper HFF range. It exhibits stationary hub structures for all the fuel blends tested, whereas the HRR correlation network is hub-free.}, language = {en}, number = {4}, journal = {Proc. Comb. Inst.}, author = {Rywik, Marcin and Kasthuri, Praveen and Boxx, Isaac and Chterev, Ianko and Polifke, Wolfgang and Sujith, R I}, year = {2022}, keywords = {published online}, pages = {4701--4710}, file = {RywikKasth22.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8P7PGD9V\\RywikKasth22.pdf:application/pdf}, } @article{YongSilva22, title = {Categorization of thermoacoustic modes in an ideal resonator with phasor diagrams}, volume = {249}, issn = {00102180}, doi = {10.1016/j.combustflame.2022.112605}, language = {en}, journal = {Combustion and Flame}, author = {Yong, Kah Joon and Silva, Camilo F. and Fournier, Guillaume J. J. and Polifke, Wolfgang}, month = mar, year = {2023}, keywords = {archived, MediaTUM}, pages = {112605}, file = {Yong et al. - 2023 - Categorization of thermoacoustic modes in an ideal.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z6YX4CGX\\Yong et al. - 2023 - Categorization of thermoacoustic modes in an ideal.pdf:application/pdf}, } @inproceedings{WangLessh23, address = {Alghero, Sardinia, Italy}, title = {Instability from {Non}-{Local} {Feedback} in a {Laminar} {V}-{Shaped} {Flame}}, booktitle = {15th {ERCOFTAC} {SIG} 33 {Workshop} "{Progress} in {Flow} {Instability}, {Transition} and {Control}"}, author = {Wang, Chuhan and Lesshafft, Lutz and Varillon, Grégoire and Polifke, Wolfgang and Xu, Chunxiao}, year = {2023}, keywords = {MediaTUM}, file = {Wang et al_2023_Instability from Non-Local Feedback in.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WEXRA7QT\\Wang et al_2023_Instability from Non-Local Feedback in.pdf:application/pdf}, } @inproceedings{EderFisch23, address = {Zurich, Switzerland}, title = {Identification of the dynamics of a turbulent spray flame at high pressure}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}}, author = {Eder, Alexander J. and Fischer, André and Lahiri, Claus and Merk, Moritz and Staufer, Max and Eggels, Ruud and Silva, Camilo F. and Polifke, Wolfgang}, year = {2023}, keywords = {archived, MediaTUM}, file = {Eder et al. - 2023 - Identification of the dynamics of a turbulent spray flame at high pressure.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UL82CU3W\\EderFisch23_final.pdf:application/pdf;Eder et al. - 2023 - SoTiC presentation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\4ZYCKVAC\\EderFisch23_SoTiC_presentation.pdf:application/pdf}, } @inproceedings{KaiseVaril23, address = {Alghero, Sardinia, Italy}, title = {Using a {Linear} {Mean} {Flow} {Analysis} with an {Active} {Flame} {Approach} to {Model} the {Response} of a {Turbulent} {Jet} {Flame} to {Acoustic} {Excitation}}, booktitle = {Progress in {Flow} {Instability}, {Transition} and {Control}}, author = {Kaiser, Thomas Ludwig and Varillon, Grégoire and Polifke, Wolfgang and Zhang, Feichi and Zirwes, Thorsten and Bockhorn, Henning and Oberleithner, Kilian}, year = {2023}, keywords = {published, accepted}, } @article{Silva23, title = {Intrinsic thermoacoustic instabilities}, volume = {95}, issn = {03601285}, doi = {10.1016/j.pecs.2022.101065}, language = {en}, journal = {Progress in Energy and Combustion Science}, author = {Silva, Camilo F.}, month = mar, year = {2023}, keywords = {MediaTUM}, pages = {101065}, file = {Silva_2023_Intrinsic thermoacoustic instabilities.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DZVUCW9A\\Silva_2023_Intrinsic thermoacoustic instabilities.pdf:application/pdf}, } @inproceedings{RywikZimme23, address = {Boston, MA, USA}, title = {Spatially resolved modeling of the nonlinear dynamics of a laminar premixed flame with a multilayer perceptron - convolution autoencoder network}, volume = {3A: Combustion, Fuels, and Emissions}, url = {https://asmedigitalcollection.asme.org/GT/GT2023/volume/86953}, doi = {10.1115/GT2023-102543}, abstract = {This work presents a multilayer perceptron-convolutional autoencoder (MLP-CAE) neural network model, which accurately predicts the two-dimensional flame field dynamics of an acousti- cally excited premixed laminar flame. The obtained architecture maps the acoustic perturbation time series to a spatially dis- tributed heat release rate field, capturing the flame lengths and shapes. This extends to previous neural network models, which predicted only the field-integrated value of the heat release rate. The MLP-CAE comprises two sub-models: a fully connected MLP and a CAE. The key idea behind the CAE network is to find a lower dimensional latent space representation of the heat release rate field. The MLP is responsible for modeling the flame dynamics by transforming the acoustic forcing signal into this latent space, enabling the decoder to produce the flow field distributions. To train the MLP-CAE, computational fluid dynamics (CFD) flame simulations with a broadband acoustic forcing were used. Its nor- malized amplitude was set to 0.5 and 1.0, resulting in a nonlinear flame response. The network was found to accurately predict the perturbed flame shapes - both under broadband and har- monic forcing. Additionally, it conserved the correct frequency response characteristics as verified by the global and local flame describing functions. The MLP-CAE provides a building block towards a potential shift away from a purely ’0D’ analysis with the assumption of acoustic compactness of the flame. When com- bined with an acoustic network, the generated flame fields could provide more physical insight in the thermoacoustic dynamics of combustion chambers. Those capabilities do not come at an additional significant computational cost, as even the previous nonspatial flame models had to train on the CFD data, which readily included field distributions.}, language = {en}, booktitle = {{ASME} {Turbo} {Expo} 2023: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Rywik, Marcin and Zimmermann, Axel and Eder, Alexander J. and Scoletta, Edoardo and Polifke, Wolfgang}, year = {2023}, keywords = {MediaTUM}, pages = {V03AT04A069}, annote = {Arguing that broadband forcing should be applied with double the amplitude of the effects one wants to reproduce with a given model }, annote = { Data used may serve as training data to train a spatially distributed system of LDO’s modelling the flame in a different way! }, annote = { Potentially interesting for spatial oscillator interpretation   }, file = {Rywik et al. - 2023 - SPATIALLY RESOLVED MODELING OF THE NONLINEAR DYNAM.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DRX8Z678\\Rywik et al. - 2023 - SPATIALLY RESOLVED MODELING OF THE NONLINEAR DYNAM.pdf:application/pdf}, } @article{KrahBuchh23, title = {Front {Transport} {Reduction} for {Complex} {Moving} {Fronts}: {Nonlinear} {Model} {Reduction} for an {Advection}–{Reaction}–{Diffusion} {Equation} with a {Kolmogorov}–{Petrovsky}–{Piskunov} {Reaction} {Term}}, volume = {96}, issn = {0885-7474, 1573-7691}, shorttitle = {Front {Transport} {Reduction} for {Complex} {Moving} {Fronts}}, url = {https://link.springer.com/10.1007/s10915-023-02210-9}, doi = {10.1007/s10915-023-02210-9}, abstract = {Abstract This work addresses model order reduction for complex moving fronts, which are transported by advection or through a reaction–diffusion process. Such systems are especially challenging for model order reduction since the transport cannot be captured by linear reduction methods. Moreover, topological changes, such as splitting or merging of fronts pose difficulties for many nonlinear reduction methods and the small non-vanishing support of the underlying partial differential equations dynamics makes most nonlinear hyper-reduction methods infeasible. We propose a new decomposition method together with a hyper-reduction scheme that addresses these shortcomings. The decomposition uses a level-set function to parameterize the transport and a nonlinear activation function that captures the structure of the front. This approach is similar to autoencoder artificial neural networks, but additionally provides insights into the system, which can be used for efficient reduced order models. In addition to the presented decomposition method, we outline a tailored hyper-reduction method that is based on the reduced integration domain method. The capability of the approach is illustrated by various numerical examples in one and two spatial dimensions, including an advection–reaction–diffusion system with a Kolmogorov–Petrovsky–Piskunov reaction term and real life application to a two-dimensional Bunsen flame.}, language = {en}, number = {1}, urldate = {2023-06-21}, journal = {Journal of Scientific Computing}, author = {Krah, Philipp and Büchholz, Steffen and Häringer, Matthias and Reiss, Julius}, month = jul, year = {2023}, keywords = {MediaTUM, ROM}, pages = {28}, file = {Krah et al_2023_Front Transport Reduction for Complex.pdf:C\:\\Users\\niebl\\Zotero\\storage\\P3NL8RD2\\Krah et al_2023_Front Transport Reduction for Complex.pdf:application/pdf}, } @inproceedings{KaisevonS23, address = {Zürich, Switzerland}, title = {On the significance of modeling turbulent transport when linearizing the governing equations of a turbulent {Bunsen} flame}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}: {Industry} meets {Academia} ({SoTiC} 2023)}, author = {Kaiser, Thomas Ludwig and von Saldern, Jakob G.R. and Goldack, Miriam and Polifke, Wolfgang and Varillon, Grégoire and Zhang, Feichi and Zirwes, Thorsten and Bockhorn, H. and Oberleithner, Kilian}, year = {2023}, keywords = {published, MediaTUM}, file = {Kaiser et al_2023_On the significance of modeling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\G7L8I68V\\Kaiser et al_2023_On the significance of modeling.pdf:application/pdf}, } @article{KaiseVaril23a, title = {Modelling the response of a turbulent jet flame to acoustic forcing in a linearized framework using an active flame approach}, volume = {253}, doi = {10.1016/j.combustflame.2023.112778}, number = {7}, journal = {Combust. Flame}, author = {Kaiser, Thomas Ludwig and Varillon, Grégoire and Polifke, Wolfgang and Zhang, Feichi and Zirwes, Thorsten and Bockhorn, H. and Oberleithner, Kilian}, year = {2023}, keywords = {published, MediaTUM}, pages = {112778}, file = {Kaiser et al_2023_Modelling the response of a turbulent.pdf:C\:\\Users\\niebl\\Zotero\\storage\\LKHKXTVU\\Kaiser et al_2023_Modelling the response of a turbulent.pdf:application/pdf}, } @article{GarciLeBr23, title = {Effect of hydrogen addition on the consumption speed of lean premixed laminar methane flames exposed to combined strain and heat loss}, volume = {27}, doi = {10.1080/13647830.2023.2182235}, language = {en}, number = {4}, journal = {Combustion Theory and Modelling}, author = {Garcia, A. M. and Le Bras, S. and Polifke, W.}, year = {2023}, note = {tex.ids= GarciLeBr23}, keywords = {archived, MediaTUM}, pages = {584--604}, file = {GarciLeBra23_CTM_Effect of H2 addition on the consumption speed of lean premixed laminar CH4 flames exposed to combined strain and heat loss.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZSGPS3AP\\GarciLeBra23_CTM_Effect of H2 addition on the consumption speed of lean premixed laminar CH4 flames exposed to combined strain and heat loss.pdf:application/pdf}, } @article{EderSilva23, title = {Incompressible versus compressible large eddy simulation for the identification of premixed flame dynamics}, volume = {15}, doi = {10.1177/17568277231154204}, language = {en}, number = {1}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Eder, Alexander J. and Silva, Camilo F. and Haeringer, Matthias and Kuhlmann, Johannes and Polifke, Wolfgang}, year = {2023}, keywords = {archived, MediaTUM}, pages = {16--32}, file = {Eder et al. - 2023 - Incompressible versus compressible large eddy simu.pdf:C\:\\Users\\niebl\\Zotero\\storage\\I25X4KRK\\Eder et al. - 2023 - Incompressible versus compressible large eddy simu.pdf:application/pdf}, } @inproceedings{EderDharm23, address = {Boston, MA, USA}, title = {Generation of entropy waves by fully premixed flames in a non-adiabatic combustor with hydrogen enrichment}, volume = {Volume 3B: Combustion, Fuels, and Emissions}, isbn = {978-0-7918-8696-0}, url = {https://asmedigitalcollection.asme.org/GT/proceedings-abstract/GT2023/86960/V03BT04A009/1167978}, doi = {10.1115/GT2023-102833}, booktitle = {{ASME} {Turbo} {Expo} 2023: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Eder, Alexander J. and Dharmaputra, Bayu and Désor, Marcel and Silva, Camilo F. and Garcia, Alex M. and Schuermans, Bruno and Noiray, Nicolas and Polifke, Wolfgang}, year = {2023}, keywords = {archived, MediaTUM}, pages = {V03BT04A009}, file = {Eder et al. - 2023 - ASME presentation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7WKW7X72\\Eder et al. - 2023 - Generation of entropy waves by fully premixed flam.pdf:application/pdf;Eder et al. - 2023 - Generation of entropy waves by fully premixed flam.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WK38CVZY\\Eder et al. - 2023 - Generation of entropy waves by fully premixed flam.pdf:application/pdf}, } @incollection{VarilBroko23, address = {Prague, CZ}, title = {Global {Linear} {Stability} {Analysis} of a {Slit} {Flame} {Subject} to {Intrinsic} {Thermoacoustic} {Instability}}, isbn = {978-80-11-03423-8}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85170647966&partnerID=40&md5=f81b7f062778c3282eac18fc2edf3812}, booktitle = {Proceedings of the 29th {International} {Congress} on {Sound} and {Vibration}}, publisher = {Society of Acoustics}, author = {Varillon, Grégoire and Brokof, Philipp and Polifke, Wolfgang}, month = jul, year = {2023}, keywords = {MediaTUM}, file = {ICSV_Varillon_#88_T03SS03.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H6RJ87N3\\ICSV_Varillon_#88_T03SS03.pdf:application/pdf;Varillon et al. - 2023 - Global Linear Stability Analysis of a Slit Flame S.pdf:C\:\\Users\\niebl\\Zotero\\storage\\IWKB8UZ8\\Varillon et al. - 2023 - Global Linear Stability Analysis of a Slit Flame S.pdf:application/pdf}, } @inproceedings{VarilKaise22, address = {La Jolla, San Diego CA, USA}, title = {Linearized {Reactive} {Flows}: {An} {Application} to {Swirl} {Flames}}, abstract = {Oral presentation at the International Conference on Numerical Combustion}, language = {English}, booktitle = {18th {International} {Conference} on {Numerical} {Combustion}}, publisher = {The Combustion Institute, Pittsburgh, PA}, author = {Varillon, Grégoire and Kaiser, Thomas-Ludwig and Oberleithner, Kilian and Polifke, Wolfgang}, month = may, year = {2022}, keywords = {published, MediaTUM, accepted}, file = {ICNC_Varillon_110522_pdf.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AT5X3E7N\\ICNC_Varillon_110522_pdf.pdf:application/pdf;Varillon et al. - 2022 - Linearized Reactive Flows An Application to Swirl.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BUH4G9Y9\\Varillon et al. - 2022 - Linearized Reactive Flows An Application to Swirl.pdf:application/pdf}, } @article{brokof_injection-coupling_2023, title = {Injection-{Coupling} {Instabilities} in the {BKD} {Combustor}: {Acoustic} {Analysis} of the {Isolated} {Injectors}}, volume = {61}, issn = {0001-1452, 1533-385X}, shorttitle = {Injection-{Coupling} {Instabilities} in the {BKD} {Combustor}}, url = {https://arc.aiaa.org/doi/10.2514/1.J062507}, doi = {10.2514/1.J062507}, abstract = {Injection coupling is a well-known cause of high-frequency combustion instability in hydrogen/liquid oxygen ([Formula: see text]) rocket engines. This type of instability is commonly explained by the two-way coupling between the dynamics of the combustion chamber and the injection system. Recent experimental studies of the BKD combustor, however, suggest that the LOX injector could be self-excited and driving the acoustic mode of the combustion chamber. To assess the feasibility of this mechanism, here, we study both experimentally and theoretically the acoustic stability of the LOX injector isolated from the combustion chamber. The experimental study was performed in a water facility mimicking the conditions of a single LOX injector. The water injector was then modeled using an acoustic network analysis, where the transfer matrix of the LOX injector inlet orifice was computed numerically using a linear approach. The analysis successfully predicts the experimental peak in unsteady pressure, revealing that the LOX injector can be self-excited. The instability was found to be driven by the whistling of the orifice at the inlet of the injector coupled with the second longitudinal acoustic mode of the LOX post tube.}, language = {en}, number = {6}, urldate = {2023-05-25}, journal = {AIAA Journal}, author = {Brokof, Philipp and Guzmán-Iñigo, Juan and Morgans, Aimee S. and Son, Min and Armbruster, Wolfgang and Hardi, Justin S.}, month = may, year = {2023}, keywords = {MediaTUM}, pages = {2581--2590}, file = {Brokof et al. - 2023 - Injection-Coupling Instabilities in the BKD Combus.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YRZI67KI\\Brokof et al. - 2023 - Injection-Coupling Instabilities in the BKD Combus.pdf:application/pdf}, } @inproceedings{BonnaPanek23, address = {Zurich, Switzerland}, title = {Contribution of {Shear} {Layer} {Dynamics} to {Thermoacoustic} {Instabilities} for a {Reacting} {Jet} in {Crossflow}}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}: {Industry} meets {Academia} ({SoTiC} 2023)}, author = {Bonnaire, Philip and Panek, Lukasz and Polifke, Wolfgang}, year = {2023}, keywords = {MediaTUM}, file = {Bonnaire et al. - 2023 - Contribution of Shear Layer Dynamics to Thermoacou.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZQNA9HJU\\Bonnaire et al. - 2023 - Contribution of Shear Layer Dynamics to Thermoacou.pdf:application/pdf}, } @article{balasubramanian_estimation_2023, title = {Estimation of {Dynamical} {Thermoacoustic} {Modes} {Using} an {Output} {Only} {Observer} {Kalman} {Filter}-{Based} {Identification} {Algorithm}}, volume = {145}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/145/5/051024/1152055/Estimation-of-Dynamical-Thermoacoustic-Modes-Using}, doi = {10.1115/1.4056308}, abstract = {Abstract Thermoacoustic instabilities have plagued the operation of gas turbine engines for years and significant research is being conducted in detecting and understanding them. In this paper, an output only identification technique is employed for a noise induced dynamical system representing combustion instability behavior. This approach is called the output only observer Kalman filter identification (O3KID) and its first step solves for least squares from a set of algebraic equations constructed from just the measured output. The least squares solution gives the Markov parameters (impulse response) and the output residuals. The subsequent step takes the Markov parameters or the residuals to solve for the system matrices using any deterministic subspace identification method. In using this direct noniterative two-step algorithm, it is possible to estimate the eigenmodes and damping coefficients from output measured data. To validate the algorithm, a system of independent harmonic oscillators, excited by random noise is used to generate surrogate data representing pressure oscillations in a combustor prior to an instability. The error in estimating the eigen frequencies and damping are \<1\%. This fast direct approach could be used to provide an early warning indicator in industrial gas turbines by tracking the rate of damping of dominant eigenmodes. Additionally, saving the state space parameters periodically can serve as a data-lean option to track changes of the dynamics and across a gas turbine fleet.}, language = {en}, number = {5}, urldate = {2023-06-13}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Balasubramanian, Nikhil and Rouwenhorst, Driek and Hermann, Jakob}, month = may, year = {2023}, keywords = {MediaTUM}, pages = {051024}, file = {Balasubramanian et al_2023_Estimation of Dynamical Thermoacoustic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M3VJYV88\\Balasubramanian et al_2023_Estimation of Dynamical Thermoacoustic.pdf:application/pdf}, } @inproceedings{BonnaPolif23, address = {Boston, Massachusetts, USA}, title = {Analysis of {High}-{Frequency} {Dynamics} of a {Reacting} {Jet} in {Crossflow} {Based} on {Large} {Eddy} {Simulation}}, isbn = {978-0-7918-8696-0}, url = {https://asmedigitalcollection.asme.org/GT/proceedings/GT2023/86960/V03BT04A010/1167905}, doi = {10.1115/GT2023-102853}, booktitle = {Volume {3B}: {Combustion}, {Fuels}, and {Emissions}}, publisher = {American Society of Mechanical Engineers}, author = {Bonnaire, Philip and Polifke, Wolfgang and Polifke, Wolfgang}, month = jun, year = {2023}, keywords = {archived, MediaTUM}, pages = {V03BT04A010}, file = {Bonnaire et al. - 2023 - Analysis of High-Frequency Dynamics of a Reacting .pdf:C\:\\Users\\niebl\\Zotero\\storage\\VC9H2YY7\\Bonnaire et al. - 2023 - Analysis of High-Frequency Dynamics of a Reacting .pdf:application/pdf}, } @article{renner_flame_2023, title = {Flame {Transfer} {Functions} of the {Lean} {Burnout} {Zone} of an {RQL} {Combustion} {Chamber} - {Dynamic} {Response} to {Primary} {Zone} and {Mixing} {Port} {Velocity} {Fluctuations}}, volume = {15}, issn = {1756-8277, 1756-8285}, url = {http://journals.sagepub.com/doi/10.1177/17568277231159172}, doi = {10.1177/17568277231159172}, abstract = {This article describes an experimental investigation of thermoacoustic flame transfer functions of the lean burnout zone of an rich–quench–lean combustion chamber. With spatial separation of the rich primary from the lean secondary dilution zone, the latter is independently examined. The multi-microphone-method was employed to characterize the combustor acoustic velocity response to acoustic forcing coming from the primary zone and the mixing ports. The lean secondary zone is then treated as a pure acoustic 3-port network element connected to a 2-port Rankine-Hugoniot flame element. Focusing only on heat release fluctuations due to velocity fluctuations, the former are described by two linear superimposed flame transfer functions as a function of the velocity fluctuations coming from the primary zone and the mixing ports, respectively. Based on a non-reacting and a reacting measurement the two flame transfer functions could be extracted from the experimental data. Within this research, flame transfer functions from the new acoustical approach are presented and compared with ones measured using chemiluminescence and a photomultiplier tube. It is found that the inverse diffusion flame in the burnout zone reacts to velocity fluctuations from the primary zone in the low frequency range and a clear low pass behavior is observed. The mixing port velocity fluctuations create a more broadband response. In the presented cases, the flame transfer functions calculated from chemiluminescence match those from the acoustic method very well.}, language = {en}, number = {2}, urldate = {2023-03-11}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Renner, Julian and March, Martin and Do, Thuy An and Merk, Moritz and Hirsch, Christoph and Sattelmayer, Thomas}, month = mar, year = {2023}, keywords = {MediaTUM}, pages = {175682772311591}, file = {Renner et al_2023_Flame Transfer Functions of the Lean.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SUJK5SPW\\Renner et al_2023_Flame Transfer Functions of the Lean.pdf:application/pdf}, } @article{TathaDoan20, title = {Modelling of the nonlinear flame response of a {Bunsen}-type flame via multi-layer perceptron}, volume = {38}, doi = {10.1016/j.proci.2020.07.115}, number = {4}, journal = {Proceedings of the Combustion Institute}, author = {Tathawadekar, N. and Doan, A. K. and Silva, C. F. and Thuerey, N.}, year = {2021}, keywords = {MediaTUM, machine learning, neural networks, flame dynamics}, pages = {6261--6269}, file = {Tathawadekar et al_2021_Modelling of the nonlinear flame.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VYGIBCAC\\Tathawadekar et al_2021_Modelling of the nonlinear flame.pdf:application/pdf}, } @article{DoehnHaeri22, title = {Nonlinear flame response modelling by a parsimonious set of ordinary differential equations}, volume = {14}, issn = {1756-8277, 1756-8285}, url = {http://journals.sagepub.com/doi/10.1177/17568277221094760}, doi = {10.1177/17568277221094760}, abstract = {In this work we present a parsimonious set of ordinary differential equations (ODEs) that describes with satisfactory precision the linear and non-linear dynamics of a typical laminar premixed flame in time and frequency domain. The proposed model is characterized by two ODEs of second-order that can be interpreted as two coupled mass-spring-damper oscillators with a symmetric, nonlinear damping term. This non-linear term is identified as function of the rate of displacement following [Formula: see text]. The model requires only four constants to be calibrated. This is achieved by carrying out an optimization procedure on one input and one output broadband signal obtained from high-fidelity numerical simulations (CFD). Note that the Transfer Function (FTF) or describing function (FDF) of the flame under investigation are not known a-priori, and therefore not used in the optimization procedure. Once the model is trained on CFD input and output time series, it is capable of recovering with quantitative accuracy the impulse response of the laminar flame under investigation and, hence, the corresponding frequency response (FTF). If fed with harmonic signals of different frequency and amplitude, the trained model is capable of retrieving with qualitative precision the flame describing function (FDF) of the studied flame. We show that the non-linear term [Formula: see text] is essential for capturing the gain saturation for high amplitudes of the input signal. All results are validated against CFD data.}, language = {en}, number = {1-2}, urldate = {2022-05-19}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Doehner, Gregor and Haeringer, Matthias and Silva, Camilo F.}, month = may, year = {2022}, keywords = {archived, MediaTUM}, pages = {17--29}, file = {Doehner et al_2022_Nonlinear flame response modelling by a.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BQNYZQQK\\Doehner et al_2022_Nonlinear flame response modelling by a.pdf:application/pdf}, } @article{MerkGaudr18d, title = {Prediction of {Combustion} {Noise} of an {Enclosed} {Flame} by {Simultaneous} {Identification} of {Noise} {Source} and {Flame} {Dynamics}}, volume = {37}, doi = {10.1016/j.proci.2018.05.124}, language = {en}, journal = {Proceedings of the Combustion Institute}, author = {Merk, M. and Gaudron, R. and Silva, C. and Gatti, M. and Mirat, C and Schuller, T and Polifke, W.}, year = {2019}, note = {tex.ids= MerkGaudr18b}, keywords = {MediaTUM*, MediaTUM}, pages = {5263--5270}, file = {Merk et al_2019_Prediction of Combustion Noise of an.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YPEMHQUZ\\Merk et al_2019_Prediction of Combustion Noise of an.pdf:application/pdf}, } @article{SilvaMerk17, title = {The {Contribution} of {Intrinsic} {Thermoacoustic} {Feedback} to {Combustion} {Noise} and {Resonances} of a {Confined} {Turbulent} {Premixed} {Flame}}, volume = {182}, issn = {00102180}, doi = {10.1016/j.combustflame.2017.04.015}, language = {en}, journal = {Combustion and Flame}, author = {Silva, Camilo F. and Merk, Malte and Komarek, Thomas and Polifke, Wolfgang}, month = aug, year = {2017}, keywords = {archived, MediaTUM}, pages = {269--278}, file = {Silva et al. - 2017 - The Contribution of Intrinsic Thermoacoustic Feedb:C\:\\Users\\niebl\\Zotero\\storage\\ZMZLZDD9\\Silva et al. - 2017 - The Contribution of Intrinsic Thermoacoustic Feedb.pdf:application/pdf}, } @techreport{VarilKaise22a, type = {{FVV}-{Informationstagung}}, title = {Dynamik von {Drall} und {Strahlflammen} {I} + {II}}, abstract = {Thermoacoustic instabilities are currently one of the impediments on the road toward flexible, reliable and safe gas-turbines, where flexibility is meant in terms of power ranging and fuel composition including H2. These characteristics are a necessary to achieve low-emission gas-turbines as support power units to carbon free power generation systems. The SWJET project (FVV Nr. 1421, DFG PO 710/22-1; OB 402/3-1) is expected to provide a leap forward with a holistic understanding of thermoacoustic instabilities in both jet and swirl flame. The working directions are two-fold: a novel understanding is expected from a numerical approach based on the theory of linearized fields, and relies on experiments to provide validation data. This report presents the advances for both experimental and numerical working area. For the experimental working area (FVV Nr. 1358), a new jet burner test rig has been design, manufactured and tested. The technical details of this test rig and first experimental results are presented, showing the effect of pilot flames on both perfectly premixed and technically premixed flame shapes and corresponding flame transfer functions (FTF). The first application of linearized analysis to turbulent flames is also reported, focusing on the linearization of the heat-release rate models and the related challenges.}, language = {English}, number = {Heft R603 (2022)}, institution = {FVV}, author = {Varillon, Grégoire and Kaiser, Thomas Ludwig and Lückoff, Finn}, month = sep, year = {2022}, file = {Grégoire Varillon et al. - 2022 - Dynamik von Drall und Strahlflammen I + II.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JCQWI4FI\\Grégoire Varillon et al. - 2022 - Dynamik von Drall und Strahlflammen I + II.pdf:application/pdf}, } @article{preethi_rajendram_soundararajan_azimuthal_2022, title = {Azimuthal {Instabilities} of an {Annular} {Combustor} with {Different} {Swirling} {Injectors}}, doi = {https://doi.org/10.1115/1.4055450}, journal = {J. Eng. Gas Turbines and Power}, author = {Preethi Rajendram Soundararajan and Daniel Durox and Antoine Renaud and , Sebastien Candel}, year = {2022}, } @techreport{haeringer_tuning_2021, title = {Tuning global reaction schemes for {H2}-{CH4} fuel blends}, institution = {TU München}, author = {Haeringer, Matthias}, year = {2021}, file = {Haeringer - 2021 - Tuning global reaction schemes for H2-CH4 fuel ble.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KVAHYUZ4\\Haeringer - 2021 - Tuning global reaction schemes for H2-CH4 fuel ble.pdf:application/pdf}, } @phdthesis{haberl_prediction_2023, address = {Munich}, type = {Semester {Thesis}}, title = {Prediction of {Laminar} {Premixed} {Flame} {Dynamics} with {Auto}-encoded {Latent} {Space} {Models}}, language = {en}, school = {Technical University of Munich}, author = {Haberl, David}, month = mar, year = {2023}, note = {Supervisor: Zimmermann}, file = {Haberl - Prediction of Laminar Premixed Flame Dynamics with.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ASHSIMTR\\Haberl - Prediction of Laminar Premixed Flame Dynamics with.pdf:application/pdf}, } @phdthesis{kedilioglu_investigating_2023, address = {München}, type = {Bachelor {Thesis}}, title = {Investigating possible benefits of generative adversarial networks ({GANs}) compared to autoencoders for spatial flame dynamics modeling}, language = {en}, school = {Technical University of Munich}, author = {Kedilioglu, Fatih}, month = jan, year = {2023}, note = {Supervisor: Zimmermann}, file = {Kedilioglu - Investigating possible benefits of generative adve.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MK63PFSM\\Kedilioglu - Investigating possible benefits of generative adve.pdf:application/pdf}, } @mastersthesis{avachat_implementation_2022, title = {Implementation, validation and comparison of different cooling architectures for sizing electric propulsion motors}, language = {English}, school = {Technical University of Munich}, author = {Avachat, Rohan Kishor}, month = nov, year = {2022}, note = {Betreuer: Merk Extern: Airbus}, file = {Avachat - 2022 - Implementation, validation and comparison of diffe.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YSBJZXZQ\\Avachat - 2022 - Implementation, validation and comparison of diffe.pdf:application/pdf}, } @article{GarciLeBr24, title = {Impact of {H2}-enrichment on the response of a partially premixed {CH4}-air flame to velocity and equivalence ratio fluctuations}, volume = {268}, doi = {10.1016/j.combustflame.2024.113595}, journal = {Combustion and Flame}, author = {Garcia, A. M. and Le Bras, S. and Prager, J. and Boxx, I. and Polifke, W.}, year = {2024}, keywords = {MediaTUM}, pages = {113595}, file = {Garcia et al. - 2024 - Impact of H 2 -enrichment on the response of a par.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NFH6BRMY\\Garcia et al. - 2024 - Impact of H 2 -enrichment on the response of a par.pdf:application/pdf}, } @inproceedings{BrokoFourn22, address = {Glasgow, Scotland}, title = {Linear time-continuous state-space realization of flame transfer functions by means of a propagation equation}, doi = {10.3397/IN_2022_0496}, booktitle = {{INTER}-{NOISE} and {NOISE}-{CON} {Congress} and {Conference} {Proceedings}}, publisher = {Institute of Noise Control Engineering}, author = {Brokof, Philipp and Fournier, Guillaume J. J. and Polifke, Wolfgang}, month = feb, year = {2023}, keywords = {MediaTUM}, pages = {3490--3501}, file = {BrokoFourn22.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YY7LMLBG\\BrokoFourn22.pdf:application/pdf}, } @inproceedings{HiestHaeri24, title = {Nitrogen {Oxides} {Prediction} for {Ultra} {WET} {Aero} {Engines} {Combustion} {Conditions} {Using} the {Flamelet}-{Generated} {Manifold} {Approach}}, abstract = {The Water-Enhanced-Turbofan (WET) concept developed by MTU Aero Engines AG aims to reduce pollutant emissions by injecting steam into the combustor. In particular, the formation of nitrogen oxides (NOx) is highly sensitive to several factors associated with the turbulent combustion process and thus poses a significant modeling challenge. The formation of nitric oxide (NO) is strongly temperature-dependent. It is therefore promoted by local hot spots, which are determined by the turbulent mixing of fuel and oxidizer. The goal of this study is to investigate the impact of steam injection on the formation of NOx. Therefore, we apply reacting large eddy flamelet-generated manifold simulations with a detailed chemical mechanism to model an adapted Sandia Flame D. We identify the kerosene mechanism best-suited for NOx prediction in the present case in advance. Due to the longer chemical time scale of NO compared to the main combustion products, its formation is considered separately. Therefore, an additional transport equation is implemented. Two approaches are employed to predict NO emissions: First, a direct lookup of the NO source term from the flamelets. Second, a decomposition of the NOx formation into a production and a consumption term. We analyze the local formation of NOx, as well as the contribution of thermal and prompt NOx to the overall NOx formation. The results are compared with an empirical NOx-WET combustion correlation. Steam injection increases the flame temperature by absorbing heat from the combustion process, effectively lowering the peak flame temperature. This temperature reduction alters the combustion chemistry by shifting the reaction kinetics and favoring reactions with lower activation energies. This suppresses the high-temperature pathways of the NOx formation and reduces the overall levels. At low steam content, the contribution of thermal NOx is dominant. With increasing steam mass fraction, the thermal pathway is effectively suppressed, and the relative contribution of prompt NOx to the overall NOx formation increases. At low steam quantities, the overall NOx levels are effectively reduced by injecting steam. At the higher steam content, the influence of steam injection on the overall NOx levels reduces. In conclusion, finding the optimum between a stable combustion process and a strong NOx reduction is essential for the design of the WET combustor.}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2024 {London}}, author = {Hiestermann, Marian and Haeringer, Matthias and Désor, Marcel and Niebler, Korbinian and Polfike, Wolfgang}, year = {2024}, keywords = {withdrawn}, file = {Hiestermann et al. - 2024 - Nitrogen Oxides Prediction for Ultra WET Aero Engi.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BRNDPBXM\\Hiestermann et al. - 2024 - Nitrogen Oxides Prediction for Ultra WET Aero Engi.pdf:application/pdf}, } @inproceedings{EderMerk24, address = {London, UK}, title = {Model-based inference of flame transfer matrices from acoustic measurements in an aero-engine test rig}, volume = {3A: Combustion, Fuels, and Emissions}, isbn = {978-0-7918-8794-3}, doi = {10.1115/GT2024-124263}, booktitle = {{ASME} {Turbo} {Expo} 2024: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {American Society of Mechanical Engineers}, author = {Eder, Alexander J. and Merk, Moritz and Hollweck, Thomas and Fischer, André and Lahiri, Claus and Silva, Camilo F. and Polifke, Wolfgang}, year = {2024}, keywords = {archived, MediaTUM}, pages = {V03AT04A040}, file = {Eder et al. - 2024 - ASME presentation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\FTYEG3KZ\\Eder et al. - 2024 - ASME presentation.pdf:application/pdf;Eder et al. - 2024 - Model-based inference of flame transfer matrices f.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9QE3VXMZ\\Eder et al. - 2024 - Model-based inference of flame transfer matrices f.pdf:application/pdf}, } @article{BrokoDougl24, title = {The role of hydrodynamic shear in the thermoacoustic response of slit flames}, volume = {40}, url = {https://www.sciencedirect.com/science/article/pii/S1540748924001706}, doi = {10.1016/j.proci.2024.105362}, number = {1-4}, journal = {Proceedings of the Combustion Institute}, author = {Brokof, Philipp and Douglas, Christopher M. and Polifke, Wolfgang}, year = {2024}, keywords = {MediaTUM}, file = {Brokof et al_2024_The role of hydrodynamic shear in the.pdf:C\:\\Users\\niebl\\Zotero\\storage\\738MTL85\\Brokof et al_2024_The role of hydrodynamic shear in the.pdf:application/pdf}, } @inproceedings{DesorHaeri24, address = {London, UK}, series = {{GT2024}-125057}, title = {Application of an improved workflow for the identification of flame dynamics to swirl stabilized {WET} combustion}, booktitle = {{ASME} {Turbo} {Expo} 2024 {Turbomachinery} {Technical} {Conference} \& {Exposition}}, author = {Désor, Marcel and Haeringer, Matthias and Hiestermann, Marian and Niebler, Korbinian and Silva, Camilo F. and Polifke, Wolfgang}, year = {2024}, keywords = {archived, MediaTUM}, file = {DesorHaeri24_final.pdf:C\:\\Users\\niebl\\Zotero\\storage\\B48TLNEF\\DesorHaeri24_final.pdf:application/pdf}, } @inproceedings{bonnaire_disturbance_2024, address = {London, GB}, title = {Disturbance {Energy} {Analysis} of {Thermoacoustic} {Instabilites} in a {Combustor} with {Reacting} {Jet} in {Cross}-flow}, author = {Bonnaire, Philip and Panek, Lukasz and Polifke, Wolfgang}, year = {2024}, keywords = {withdrawn}, file = {Bonnaire et al. - 2024 - Disturbance Energy Analysis of Thermoacoustic Inst.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MYP5RIC8\\Bonnaire et al. - 2024 - Disturbance Energy Analysis of Thermoacoustic Inst.pdf:application/pdf}, } @article{GuoSilva20, title = {Efficient {Robust} {Design} for {Thermoacoustic} {Instability} {Analysis}: {A} {Gaussian} {Process} {Approach}}, volume = {142}, issn = {0742-4795, 1528-8919}, shorttitle = {Efficient {Robust} {Design} for {Thermoacoustic} {Instability} {Analysis}}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/doi/10.1115/1.4044197/955389/Efficient-Robust-Design-for-Thermoacoustic}, doi = {10.1115/1.4044197}, abstract = {Abstract In the preliminary phase of analyzing the thermoacoustic characteristics of a gas turbine combustor, implementing robust design principles is essential to minimize detrimental variations of its thermoacoustic performance under various sources of uncertainties. In this study, we systematically explore different aspects of robust design in thermoacoustic instability analysis, including risk analysis, control design, and inverse tolerance design. We simultaneously take into account multiple thermoacoustic modes and uncertainty sources from both the flame and acoustic boundary parameters. In addition, we introduce the concept of a “risk diagram” based on specific statistical descriptions of the underlying uncertain parameters, which allows practitioners to conveniently visualize the distribution of the modal instability risk over the entire parameter space. Throughout this study, a machine learning method called “Gaussian process” (GP) modeling approach is employed to efficiently tackle the challenge posed by the large parameter variational ranges, various statistical descriptions of the parameters, as well as the multifaceted nature of robust design analysis. For each of the investigated robust design tasks, we propose an efficient solution strategy and benchmark the accuracy of the results delivered by GP models. We demonstrate that GP models can be flexibly adjusted to various tasks while only requiring one-time training. Their adaptability and efficiency make this modeling approach very appealing for industrial practices.}, language = {en}, number = {3}, urldate = {2023-10-20}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Guo, Shuai and Silva, Camilo F. and Polifke, Wolfgang}, month = mar, year = {2020}, pages = {031026}, } @article{HiestHaeri23, title = {Comparison of non-premixed and premixed flamelets for ultra {WET} {Aero} {Engine} {Combustion} {Conditions}}, number = {GPPS-TC-2023-0277}, journal = {GPPS23}, author = {Hiestermann, Marian and Haeringer, Matthias and Désor, Marcel and Polifke, Wolfgang}, year = {2023}, keywords = {MediaTUM}, pages = {18}, file = {GPPS-TC-2023-277-CCBYNCND.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M94FGT5C\\GPPS-TC-2023-277-CCBYNCND.pdf:application/pdf}, } @phdthesis{oesuen_modeling_2023, type = {Semester {Thesis}}, title = {Modeling the flame response of a turbulent flame by neural networks}, school = {TU München}, author = {Oesuen, Alper}, year = {2023}, note = {Betreuer. Silva}, file = {Oesuen - 2023 - Modeling the flame response of a turbulent flame b.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2CZUUJJZ\\Oesuen - 2023 - Modeling the flame response of a turbulent flame b.pdf:application/pdf}, } @article{BonnaPolif23a, title = {Analysis of {High}-{Frequency} {Dynamics} of a {Reacting} {Jet} in {Crossflow} {Based} on {Large} {Eddy} {Simulation}}, volume = {146}, issn = {0742-4795, 1528-8919}, doi = {10.1115/1.4063540}, number = {3}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Bonnaire, Philip and Polifke, Wolfgang}, year = {2024}, keywords = {archived, MediaTUM}, pages = {031002}, file = {Bonnaire and Polifke - 2023 - Analysis of High-Frequency Dynamics of a Reacting .pdf:C\:\\Users\\niebl\\Zotero\\storage\\8XVHJJP5\\Bonnaire and Polifke - 2023 - Analysis of High-Frequency Dynamics of a Reacting .pdf:application/pdf}, } @misc{fournier_tax_2022, title = {{taX} {Tutorial}}, url = {https://www.youtube.com/watch?v=zJPYYnXuc9w&list=PLfxkIz8pKva4lDgY2P5NfVEDBplpBbwmu}, language = {Englisch}, author = {Fournier, Guillaume J. J.}, year = {2022}, } @inproceedings{douglas_unfolding_2023, title = {Unfolding the weakly-nonlinear dynamics of polyhedral flames}, url = {https://meetings.aps.org/Meeting/DFD22/Session/J18.1}, abstract = {Under certain conditions, conical lean premixed flames spontaneously break their continuous azimuthal symmetry to form corrugated polyhedral flames with discrete symmetry. In particular, such polyhedral shapes are commonly observed in hydrogen flame experiments. In our earlier works, we have shown that this phenomenon is driven by the intrinsic flame dynamics via a global linear instability with zero frequency that occurs at sufficiently low Lewis number and/or sufficiently high Damköhler number. In this work, we perform a center manifold reduction for this circle-pitchfork (CP) type bifurcation in order to elucidate the weakly-nonlinear dynamics of the transition. To start, we study the case of a single bifurcating polyhedral mode, where the universal unfolding reveals the global spatiotemporal nonlinear dynamics in the vicinity of the critical point. We then move on to a bimodal case where two modes of different azimuthal symmetries simultaneously bifurcate from a codimension-2 double-CP point. In this case, the analysis reveals complex global dynamics that include mixed modes, which may be linked to experimental observations of spontaneously rotating polyhedral flame structures.}, booktitle = {76th {APS}/{DFD} {Annual} {Meeting}}, author = {Douglas, Christopher M. and Polifke, Wolfgang and Lesshafft, Lutz}, year = {2023}, note = {tex.ids= DouglPolif23b}, keywords = {MediaTUM}, } @article{barwey_using_2022, title = {Using {Machine} {Learning} to {Construct} {Velocity} {Fields} from {OH}-{PLIF} {Images}}, volume = {194}, issn = {0010-2202, 1563-521X}, url = {https://www.tandfonline.com/doi/full/10.1080/00102202.2019.1678379}, doi = {10.1080/00102202.2019.1678379}, language = {en}, number = {1}, urldate = {2023-07-13}, journal = {Combustion Science and Technology}, author = {Barwey, Shivam and Hassanaly, Malik and Raman, Venkat and Steinberg, Adam}, month = jan, year = {2022}, pages = {93--116}, file = {Barwey et al_2022_Using Machine Learning to Construct.pdf:C\:\\Users\\niebl\\Zotero\\storage\\SQKQBXDI\\Barwey et al_2022_Using Machine Learning to Construct.pdf:application/pdf}, } @article{PolifGente04, title = {Order and {Realizability} of {Impulse} {Response} {Filters} for {Accurate} {Identification} of {Acoustic} {Multi}-{Ports} from {Transient} {CFD}}, volume = {9}, issn = {1027-5851}, doi = {10.20855/ijav.2004.9.3163}, number = {3}, journal = {Int. J. of Acoustics and Vibration}, author = {Polifke, W and Gentemann, A M G}, month = sep, year = {2004}, keywords = {Acoustics, Frequency response, Unrev'd}, pages = {139--148}, } @article{PolifPonce01, title = {Reconstruction of {Acoustic} {Transfer} {Matrices} by {Instationary} {Computational} {Fluid} {Dynamics}}, volume = {245}, doi = {10.1006/jsvi.2001.3594}, number = {3}, journal = {J. of Sound and Vibration}, author = {Polifke, W and Poncet, A and Paschereit, C O and Döbbeling, K}, month = aug, year = {2001}, keywords = {Thermoacoustics, Frequency response, Rev'd}, pages = {483--510}, file = {Polifke et al_2001_Reconstruction of Acoustic Transfer.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2JX64RV5\\Polifke et al_2001_Reconstruction of Acoustic Transfer.pdf:application/pdf}, } @inproceedings{VarilKaise23, address = {Zürich, Switzerland}, title = {A comprehensive linearised flow model for swirling jets}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}: {Industry} meets {Academia} ({SoTiC} 2023)}, author = {Varillon, Grégoire and Kaiser, Thomas Ludwig and Philipp, , Brokof and {Oberleithner, Kilian} and {Polifke, Wolfgang}}, year = {2023}, keywords = {MediaTUM}, file = {Varillon et al. - 2023 - A comprehensive linearised flow model for swirling.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H9AMYDK2\\Varillon et al. - 2023 - A comprehensive linearised flow model for swirling.pdf:application/pdf}, } @article{EderDharm24, title = {Identification of entropy waves in a partially premixed combustor}, volume = {40}, url = {https://authors.elsevier.com/sd/article/S1540-7489(24)00417-6}, doi = {10.1016/j.proci.2024.105609}, number = {1--4}, journal = {Proceedings of the Combustion Institute}, author = {Eder, Alexander J. and Dharmaputra, Bayu and Garcia, Alex M. and Silva, Camilo F. and Polifke, Wolfgang}, year = {2024}, keywords = {archived, MediaTUM}, pages = {105609}, annote = {SlideCast on YouTube https://youtu.be/oGjtn1mUdmw?feature=shared }, file = {Eder et al. - 2024 - Identification of entropy waves in a partially premixed combustor.pdf:C\:\\Users\\niebl\\Zotero\\storage\\H97QF9HY\\Eder et al. - 2024 - Identification of entropy waves in a partially premixed combustor.pdf:application/pdf;Eder et al. - 2024 - Symposium presentation.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CRSXXPE3\\PROCI-23-01059_presentation.pdf:application/pdf}, } @article{EderDharm23a, title = {Generation of entropy waves by fully premixed flames in a non-adiabatic combustor with hydrogen enrichment}, volume = {145}, doi = {10.1115/1.4063283}, language = {en}, number = {11}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Eder, Alexander J. and Dharmaputra, Bayu and Désor, Marcel and Silva, Camilo F. and Garcia, Alex M. and Schuermans, Bruno and Noiray, Nicolas and Polifke, Wolfgang}, year = {2023}, keywords = {published, archived}, pages = {111001}, file = {Eder et al. - 2023 - Generation of Entropy Waves by Fully Premixed Flam.pdf:C\:\\Users\\niebl\\Zotero\\storage\\F75CVI5M\\Eder et al. - 2023 - Generation of Entropy Waves by Fully Premixed Flam.pdf:application/pdf}, } @article{MerkEder24, title = {An {Arbitrary} {Lagrangian}-{Eulerian} framework for the consistent analysis of entropy wave generation}, volume = {262}, issn = {0010-2180}, doi = {10.1016/j.combustflame.2024.113334}, language = {en}, journal = {Combustion and Flame}, author = {Merk, Moritz and Eder, Alexander J. and Polifke, Wolfgang}, month = apr, year = {2024}, keywords = {archived, MediaTUM}, pages = {113334}, file = {CNF_MerkEder24_SupplementaryMaterial.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3U2RBYW6\\CNF_MerkEder24_SupplementaryMaterial.pdf:application/pdf;CNF_MerkEder24.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3FXBGU49\\CNF_MerkEder24.pdf:application/pdf}, } @article{balasubramanian_mitigation_2022, title = {Mitigation of combustion instabilities by local diluent injection in a premixed swirl stabilized combustor}, volume = {245}, issn = {00102180}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218022003492}, doi = {10.1016/j.combustflame.2022.112334}, language = {en}, urldate = {2023-11-08}, journal = {Combustion and Flame}, author = {Balasubramanian, Nikhil and Cao, Dongang and Greenberg, Inbar and Michaels, Dan}, month = nov, year = {2022}, pages = {112334}, file = {Balasubramanian et al. - 2022 - Mitigation of combustion instabilities by local di.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NB3B2RCD\\Balasubramanian et al. - 2022 - Mitigation of combustion instabilities by local di.pdf:application/pdf}, } @inproceedings{YaoSilva24, title = {Comparison of {Standard} {Bayesian} {Methods} and {PINNs} for the {Reconstruction} of {Acoustic} {Fields} under {External} {Broadband} {Forcing}}, booktitle = {{INTER}-{NOISE} and {NOISE}-{CON} {Congress} and {Conference} {Proceedings}}, author = {Yao, Junting and Silva, Camilo F.}, year = {2024}, keywords = {MediaTUM, machine learning}, file = {Yao and Silva - 2024 - Comparison of Standard Bayesian Methods and PINNs .pdf:C\:\\Users\\niebl\\Zotero\\storage\\Z9FY2353\\Yao and Silva - 2024 - Comparison of Standard Bayesian Methods and PINNs .pdf:application/pdf}, } @phdthesis{Hayn23, type = {Bachelor {Thesis}}, title = {Influence of {Shear} {Layer} {Dynamics} in a {Reacting} {Jet} in {Crossflow} on {Thermoacoustic} {Coupling} {Mechanisms}}, school = {TU München}, author = {Hayn, Luis}, month = sep, year = {2023}, note = {Betreuer: Bonnaire}, file = {Hayn - 2023 - Influence of Shear Layer Dynamics in a Reacting Je.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VN666G7Z\\Hayn - 2023 - Influence of Shear Layer Dynamics in a Reacting Je.pdf:application/pdf}, } @phdthesis{Hollw24, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Extended {Model}-{Based} {Inference} of {Flame} {Transfer} {Matrices} from {Acoustic} {Measurements}}, school = {Technical University of Munich}, author = {Hollweck, Thomas}, month = apr, year = {2024}, note = {Betreuer: Alexander Eder/Moritz Merk}, keywords = {published}, file = {Hollweck - 2024 - Extended Model-Based Inference of Flame Transfer M.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TXAZPHYL\\Hollweck - 2024 - Extended Model-Based Inference of Flame Transfer M.pdf:application/pdf}, } @mastersthesis{Garci24, address = {Garching, Germany}, title = {Numerical {Simulation} and {Assessment} of a {Turbulent} {Swirl} {Flame} for {Thermo}-{Acoustic} {Investigations} using {PRECISE}-{UNS}}, school = {Technical University of Munich}, author = {Garcia Guzman, Nicolas Mateo}, month = apr, year = {2024}, note = {Betreuer: Alexander Eder/Grégoire Varillon}, file = {Garcia Guzman - 2024 - Numerical Simulation and Assessment of a Turbulent.pdf:C\:\\Users\\niebl\\Zotero\\storage\\WI88PGVN\\Garcia Guzman - 2024 - Numerical Simulation and Assessment of a Turbulent.pdf:application/pdf}, } @phdthesis{Neure23, address = {Garching}, type = {Semester {Thesis}}, title = {Assessment and {Optimization} of {Species} {Transport} for {Laminar} {Methane}-{Hydrogen} {Flames} in {OpenFOAM}}, school = {Technical University of Munich}, author = {Neurekar, Vaman Nitin Sinai}, month = apr, year = {2023}, note = {Betreuer: Marcel Désor/Alexander Eder/Grégoire Varillon}, file = {Neurekar - 2023 - Assessment and Optimization of Species Transport f.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YV7IKTS3\\Neurekar - 2023 - Assessment and Optimization of Species Transport f.pdf:application/pdf}, } @phdthesis{brock_numerical_2023, address = {Garching, Germany}, type = {Bachelor {Thesis}}, title = {Numerical investigation of global mechanisms in {OpenFOAM} for methane and kerosene combustion under {WET} conditions}, school = {Technical University of Munich}, author = {Brock, Severin}, month = jun, year = {2023}, note = {Betreuer: Hiestermann, Désor}, file = {Brock - 2023 - Numerical investigation of global mechanisms in Op.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QB7RSP7I\\Brock - 2023 - Numerical investigation of global mechanisms in Op.pdf:application/pdf}, } @mastersthesis{bonnaire_stochastic_2020, title = {Stochastic {Modeling} of {Turbulent} {Flows} using intrusive generalized {Polynomial} {Chaos} {Expansion} for the {Reynolds}-averaged {Navier}-{Stokes} equations}, school = {TU München}, author = {Bonnaire, Philip}, year = {2020}, note = {Betreuer: Silva}, file = {Bonnaire - 2020 - Stochastic Modeling of Turbulent Flows using intru.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TUVJB7ZA\\Bonnaire - 2020 - Stochastic Modeling of Turbulent Flows using intru.pdf:application/pdf}, } @article{tathawadekar_incomplete_2023, title = {Incomplete to complete multiphysics forecasting: a hybrid approach for learning unknown phenomena}, volume = {4}, issn = {2632-6736}, shorttitle = {Incomplete to complete multiphysics forecasting}, url = {https://www.cambridge.org/core/product/identifier/S2632673623000205/type/journal_article}, doi = {10.1017/dce.2023.20}, abstract = {Modeling complex dynamical systems with only partial knowledge of their physical mechanisms is a crucial problem across all scientific and engineering disciplines. Purely data-driven approaches, which only make use of an artificial neural network and data, often fail to accurately simulate the evolution of the system dynamics over a sufficiently long time and in a physically consistent manner. Therefore, we propose a hybrid approach that uses a neural network model in combination with an incomplete partial differential equations (PDEs) solver that provides known, but incomplete physical information. In this study, we demonstrate that the results obtained from the incomplete PDEs can be efficiently corrected at every time step by the proposed hybrid neural network—PDE solver model, so that the effect of the unknown physics present in the system is correctly accounted for. For validation purposes, the obtained simulations of the hybrid model are successfully compared against results coming from the complete set of PDEs describing the full physics of the considered system. We demonstrate the validity of the proposed approach on a reactive flow, an archetypal multi-physics system that combines fluid mechanics and chemistry, the latter being the physics considered unknown. Experiments are made on planar and Bunsen-type flames at various operating conditions. The hybrid neural network—PDE approach correctly models the flame evolution of the cases under study for significantly long time windows, yields improved generalization and allows for larger simulation time steps.}, language = {en}, urldate = {2023-11-22}, journal = {Data-Centric Engineering}, author = {Tathawadekar, Nilam N. and Doan, Nguyen Anh Khoa and Silva, Camilo F. and Thuerey, Nils}, year = {2023}, keywords = {MediaTUM}, pages = {e27}, file = {Full Text:C\:\\Users\\niebl\\Zotero\\storage\\E99PPKIU\\Tathawadekar et al. - 2023 - Incomplete to complete multiphysics forecasting a.pdf:application/pdf}, } @article{asprey_statistical_2000, title = {Statistical tools for optimal dynamic model building}, volume = {24}, issn = {00981354}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0098135400003288}, doi = {10.1016/S0098-1354(00)00328-8}, language = {en}, number = {2-7}, urldate = {2024-02-02}, journal = {Computers \& Chemical Engineering}, author = {Asprey, S.P. and Macchietto, S.}, month = jul, year = {2000}, pages = {1261--1267}, file = {Asprey_Macchietto_2000_Statistical tools for optimal dynamic.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YBL2Q3BF\\Asprey_Macchietto_2000_Statistical tools for optimal dynamic.pdf:application/pdf}, } @techreport{KaiseVaril24b, type = {{FVV}-{Informationstagung}}, title = {\{{Dynamik} von {Drall} und {Strahlflammen} {II} {FVV} {Nr}. 1421 {Tagungsbericht}\}}, language = {Englich}, number = {1421}, institution = {FVV}, author = {Kaiser, Thomas Ludwig and Varillon, Grégoire and Oberleithner, Kilian and Polifke, Wolfgang}, month = jan, year = {2024}, file = {Kaiser et al. - 2024 - Dynamik von Drall und Strahlflammen II FVV Nr. 142.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ETK3H6N7\\Kaiser et al. - 2024 - Dynamik von Drall und Strahlflammen II FVV Nr. 142.pdf:application/pdf;TB_R608_FT24_AB_1421_Dynamic Swirl and Jet Flames II_2024-03-14_corr_AD_TLK_AD_TLK.docx:C\:\\Users\\niebl\\Zotero\\storage\\BME8DQ8M\\TB_R608_FT24_AB_1421_Dynamic Swirl and Jet Flames II_2024-03-14_corr_AD_TLK_AD_TLK.docx:application/vnd.openxmlformats-officedocument.wordprocessingml.document}, } @phdthesis{hofer_sindy_2023, address = {München}, type = {Semester {Thesis}}, title = {{SINDy} - {A} promising machine learning approach to predict flame dynamics}, school = {Technical University of Munich}, author = {Hofer, Benedikt}, month = oct, year = {2023}, note = {Supervisor: Axel Zimmermann}, file = {_.pdf:C\:\\Users\\niebl\\Zotero\\storage\\A5LNRP7E\\_.pdf:application/pdf}, } @mastersthesis{yolcu_evaluation_2023, address = {München, Germany}, title = {Evaluation of the {Impact} of {Humidity} {Levels} on {Performance} and {Plasma} {Characteristics} in an {Oxygen} {Fueled} {Hall} {Effect} {Thruster} at the {Imperial} {College} {Space} {Lab}}, language = {Englisch}, school = {Technical University of Munich / Imperial College}, author = {Yolcu, Edis Mashar}, month = nov, year = {2023}, note = {Supervisor: Zimmermann Axel}, file = {_.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PGLXEPKC\\_.pdf:application/pdf}, } @article{EigemBonna25, title = {Amplification of thermoacoustic flame response to investigate high frequency combustion instabilities with {LES}}, volume = {280}, issn = {00102180}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218025003554}, doi = {10.1016/j.combustflame.2025.114317}, language = {en}, journal = {Combustion and Flame}, author = {Eigemann, Jonas and Bonnaire, Philip and Panek, Lukasz and Beck, Christian and Polifke, Wolfgang and Kempf, Andreas}, month = oct, year = {2025}, keywords = {MediaTUM}, pages = {114317}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\8PAKHU7C\\Eigemann et al. - 2025 - Amplification of Thermoacoustic Flame Response to Investigate Combustion Instabilities with LES.pdf:application/pdf}, } @phdthesis{Shank23, type = {Semester thesis}, title = {On the use of {Conjugate} {Heat}-{Transfer} to {Investigate} {Flashback} in {Large} {Eddy} {Simulations}}, language = {English}, school = {TUM}, author = {Shankhdhar, Akash}, month = nov, year = {2023}, note = {Betreuer: Grégoire Varillon}, file = {Shankhdhar - 2023 - On the use of Conjugate Heat-Transfer to Investiga.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9KBXKI5U\\Shankhdhar - 2023 - On the use of Conjugate Heat-Transfer to Investiga.pdf:application/pdf}, } @article{MerkSchil25, title = {A {Jacobian}-based framework for the derivation of comprehensive thermoacoustic jump conditions}, volume = {274}, url = {https://doi.org/10.1016/j.combustflame.2024.113958}, doi = {10.1016/j.combustflame.2024.113958}, journal = {Combustion and Flame}, author = {Merk, Moritz and Schily, Felix and Polifke, Wolfgang}, year = {2025}, note = {Draft}, keywords = {archived, MediaTUM}, pages = {113958}, file = {Merk et al. - 2025 - A Jacobian-based framework for the derivation of comprehensive thermoacoustic jump conditions:C\:\\Users\\niebl\\Zotero\\storage\\V3UW5545\\Merk et al. - 2025 - A Jacobian-based framework for the derivation of comprehensive thermoacoustic jump conditions.pdf:application/pdf;MerkSchil24_CNF_SupplementaryMaterial.pdf:C\:\\Users\\niebl\\Zotero\\storage\\RLFHXBFY\\MerkSchil24_CNF_SupplementaryMaterial.pdf:application/pdf}, } @inproceedings{BrokoVaril24, address = {Kyoto}, title = {Structural sensitivity analysis to identify driving flow regions of intrinsic thermoacoustic instabilities}, abstract = {Intrinsic thermoacoustic (ITA) instabilities result from constructive feedback among acoustics, flame- and hydro-dynamics. An acoustic resonator is not required to sustain the instability, and indeed ITA instabilities may occur in anechoic environments. The driving flow phenomena may then be localized in the immediate vicinity of injector and flame. Nevertheless, acoustic wave propagation within this domain supports long-range feedback mechanism, casting doubt on the local-to-local perturbation approach as it is commonly adopted in structural sensitivity analysis to identify driving regions in incompressible flows. For thermoacoustic instabilities, the special situation arises that one contributor to the instability is known, i.e. unsteady heat release of the flame. In compact domains, acoustic waves emitted by the flame will be felt everywhere almost immediately and correlate with the fluctuating net volume expansion/contraction caused by the flame. Hence, we suggest to simply identify driving flow regions for ITA instabilities as those with the strongest receptivity of the associated eigenvalue to uniform perturbations correlated with the global heat release rate. For the case of a laminar premixed slit flame, which shows two distinct possibilities for ITA feedback, classical structural sensitivity analysis and the receptivity approach will be compared with respect to identifying driving regions for ITA instability.}, booktitle = {{ICNC} 2024, 19th {International} {Conference} on {Numerical} {Combustion}}, author = {Brokof, Philipp and Varillon, Grégoire and Polifke, Wolfgang, Wolfgang}, year = {2024}, keywords = {MediaTUM}, file = {Brokof et al. - 2024 - Structural sensitivity analysis to identify drivin.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6XCI4SWH\\Brokof et al. - 2024 - Structural sensitivity analysis to identify drivin.pdf:application/pdf;ICNC24_outline_240416.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QA2NPT5G\\ICNC24_outline_240416.pdf:application/pdf}, } @phdthesis{Eder24, address = {Munich, Germany}, type = {Ph.{D}. {Thesis}}, title = {Prediction of {Flame} {Dynamics} and {Thermoacoustic} {Interactions} in {Partially} {Premixed} {Combustors}}, language = {en}, school = {Technical University of Munich}, author = {Eder, Alexander J.}, year = {2024}, file = {Eder - 2024 - Prediction of Flame Dynamics and Thermoacoustic In.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VFKQHKHS\\Eder - 2024 - Prediction of Flame Dynamics and Thermoacoustic In.pdf:application/pdf;Eder PhD Defense.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HY9L2UXJ\\Eder - 2024 - Defense presentation.pdf:application/pdf}, } @mastersthesis{penumarthi_evaluating_2024, title = {Evaluating the {Capability} of {PINNs} for {Inverse} {Problems} in {Thermoacoustics}}, school = {TU München}, author = {Penumarthi, Surya}, month = may, year = {2024}, note = {Betreuer: Silva/Niebler}, file = {Penumarthi - 2024 - Evaluating the Capability of PINNs for Inverse Pro.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MNSSTDRR\\Penumarthi - 2024 - Evaluating the Capability of PINNs for Inverse Pro.pdf:application/pdf}, } @article{TathaOsun24, title = {Linear and nonlinear flame response prediction of turbulent flames using neural network models}, volume = {16}, issn = {1756-8277, 1756-8285}, url = {https://journals.sagepub.com/doi/10.1177/17568277241262641}, doi = {10.1177/17568277241262641}, abstract = {Modelling the flame response of turbulent flames via data-driven approaches is challenging due, among others, to the presence of combustion noise. Neural network methods have shown good potential to infer laminar flames’ linear and nonlinear flame response when externally forced with broadband signals. The present work extends those studies and analyses the ability of neural network models to evaluate the linear and nonlinear flame response of turbulent flames. In the first part of this work, the neural network is trained to evaluate and interpolate the linear flame response model when presented with data obtained at various thermal conditions. In the second part, the neural network is trained to infer the nonlinear flame response model when presented with time series exhibiting sufficient large amplitudes. In both cases, the data is obtained from a large eddy simulation of an academic combustor when acoustically forced by broadband signals.}, number = {3}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Tathawadekar, Nilam and Ösün, Alper and Eder, Alexander J. and Silva, Camilo F. and Thuerey, Nils}, year = {2024}, keywords = {MediaTUM}, pages = {93--103}, file = {Tathawadekar et al. - 2024 - Linear and nonlinear flame response prediction of .pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZVUW9IB2\\Tathawadekar et al. - 2024 - Linear and nonlinear flame response prediction of .pdf:application/pdf}, } @article{SilvaPolif24, title = {A new class of {Galerkin} expansion models for the study of thermoacoustic instabilities}, volume = {40}, doi = {10.1016/j.proci.2024.105242}, number = {1-4}, journal = {Proceedings of the Combustion Institute}, author = {Silva, C. F. and Polifke, W.}, year = {2024}, keywords = {archived, MediaTUM}, pages = {105242}, file = {Silva_Polifke_2024_A new class of Galerkin expansion.pdf:C\:\\Users\\niebl\\Zotero\\storage\\R4B9GWCM\\Silva_Polifke_2024_A new class of Galerkin expansion.pdf:application/pdf}, } @article{DoehnEder24, title = {A parsimonious system of ordinary differential equations for the response modeling of turbulent swirled flames}, volume = {266}, issn = {00102180}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218024001172}, doi = {10.1016/j.combustflame.2024.113408}, abstract = {In this work, we present a parsimonious set of ordinary differential equations (ODEs), describing with good precision and over a wide range of frequencies the linear and nonlinear dynamics of different types of fully premixed, turbulent, swirl-stabilized flames. This phenomenological model comprises eight ODEs and can physically be interpreted as a superposition of two mass–spring–damper systems.}, language = {en}, urldate = {2024-06-04}, journal = {Combustion and Flame}, author = {Doehner, Gregor and Eder, Alexander J. and Silva, Camilo F.}, month = aug, year = {2024}, keywords = {archived, MediaTUM}, pages = {113408}, file = {Doehner et al. - 2024 - A parsimonious system of ordinary differential equ.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W62F5T42\\Doehner et al. - 2024 - A parsimonious system of ordinary differential equ.pdf:application/pdf}, } @inproceedings{ZimmeEder24, address = {Kyoto, Japan}, title = {Probabilistic {Machine} {Learning} for {Data}-{Based} {Flame} {Dynamics} {Modeling}}, abstract = {Accurately modeling flame dynamics is crucial for predicting thermoacoustic instabilities. While neural networks have demonstrated their effectiveness in reproducing the nonlinear dynamics of laminar premixed flames, their applicability to turbulent flames has yet to be demonstrated. The challenges in this application are manifold: Firstly, the sparsity of data, resulting from the high computational demand of reacting flow simulations; secondly, the presence of combustion noise resulting in noisy data; and thirdly, the 'black box' nature of these models raises questions about their reliability for industrial use. In this study, we seek to address the aforementioned issues using Bayesian neural networks (BNNs). BNNs promise a significant advantage in this context due to their inherent capability to quantify uncertainty. Uncertainty estimation can provide insights into data requirements across various flame dynamics regimes, thus potentially reducing the overall required data. Moreover, with BNNs, combustion noise can be naturally modeled by choosing an appropriate likelihood function. We present the capabilities of the Bayesian approach on a laminar premixed flame. We train the network on broadband-forcing data and evaluate whether the predicted flame-describing function and the associated confidence intervals can be trusted.}, booktitle = {{ICNC} 2024, 19th {International} {Conference} on {Numerical} {Combustion}}, author = {Zimmermann, Axel and Eder, Alexander J. and Silva, Camilo F. and Polifke, Wolfgang}, year = {2024}, keywords = {archived, MediaTUM}, file = {Zimmermann et al. - 2024 - Probabilistic Machine Learning for Data-Based Flam.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GZILJUZ6\\Zimmermann et al. - 2024 - Probabilistic Machine Learning for Data-Based Flam.pdf:application/pdf}, } @phdthesis{Halda24, address = {Garching, Germany}, type = {Research internship}, title = {Verification of a new subgrid-scale model for {Large} {Eddy} {Simulation}}, school = {TU Munich}, author = {Haldar, Amit Kumar}, month = mar, year = {2024}, note = {Supervisor: Marcel Désor, Grégoire Varillon}, file = {Haldar - 2024 - Verification of a new subgrid-scale model for Larg.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5K4QYCC9\\Haldar - 2024 - Verification of a new subgrid-scale model for Larg.pdf:application/pdf}, } @phdthesis{Herna24, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Assessment of the impact of steam on technically premixed combustion in the {Preccinsta} {Burner} using {Large} {Eddy} {Simulation}}, language = {English}, school = {TU München}, author = {Hernan-Gomez Mingo, Miriam}, month = may, year = {2024}, note = {Supervisor: Marcel Désor}, file = {Hernan-Gomez Mingo - 2024 - Assessment of the impact of steam on technically p.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GALA3Z4T\\Hernan-Gomez Mingo - 2024 - Assessment of the impact of steam on technically p.pdf:application/pdf}, } @mastersthesis{Hofer24, address = {Garching, Germany}, title = {Extension of the {ATF} combustion model for the application to {RQL} combustors}, author = {Hofer, Benedikt}, month = may, year = {2024}, note = {Supervisors: Marcel Désor (TUM) Matthias Haeringer (MTU)}, file = {Hofer - 2024 - Extension of the ATF combustion model for the appl.pdf:C\:\\Users\\niebl\\Zotero\\storage\\YSXBJHVK\\Hofer - 2024 - Extension of the ATF combustion model for the appl.pdf:application/pdf}, } @article{VarilKaise25, title = {Coupling mechanisms in a non-uniform compressible swirling jet with a modelled swirler}, journal = {under review in Journal of Fluid Mechanics}, author = {Varillon, Grégoire and Kaiser, Thomas L. and Brokof, Philipp and Weißbach, Dominik and Oberleithner, Kilian and Polifke, Wolfgang}, year = {2025}, keywords = {work-in-progress, submitted}, file = {Varillon et al. - 2025 - Coupling mechanisms in a non-uniform compressible .pdf:C\:\\Users\\niebl\\Zotero\\storage\\2AX5S36S\\Varillon et al. - 2025 - Coupling mechanisms in a non-uniform compressible .pdf:application/pdf}, } @incollection{PolifEder24, address = {Garching, Germany}, title = {Identification of entropy waves in a partially premixed combustor}, isbn = {978-3-9816675-6-1}, language = {en}, booktitle = {High {Performance} {Computing} in {Science} and {Engineering} {Garching}/{Munich} 2024}, publisher = {Leibniz-Rechenzentrum der Bayerischen Akademie der Wissenschaft}, author = {Polifke, Wolfgang and Eder, Alexander J.}, editor = {Bastian, Peter and Kranzlmüller, Dieter and Brüchle, Helmut and Mathias, Gerald}, year = {2024}, keywords = {MediaTUM}, pages = {196--197}, file = {Polifke and Eder - 2024 - Identification of entropy waves in a partially pre.pdf:C\:\\Users\\niebl\\Zotero\\storage\\47Z46W6S\\Polifke and Eder - 2024 - Identification of entropy waves in a partially pre.pdf:application/pdf}, } @phdthesis{martens_modelling_2020, type = {Semester {Thesis}}, title = {Modelling of {Diffusive} {Terms} and {Their} {Influence} on {Thermoacoustic} {Linear} {Stability} {Analysis} in a {Discontinuous} {Galerkin} {Framework}}, school = {Technical University of Munich}, author = {Martens, Christian James}, year = {2020}, note = {Betreuer: Merk/Meindl}, file = {Martens - 2020 - Modelling of Diffusive Terms and Their Influence o.pdf:C\:\\Users\\niebl\\Zotero\\storage\\24X9L8WC\\Martens - 2020 - Modelling of Diffusive Terms and Their Influence o.pdf:application/pdf}, } @techreport{EderPolif24, type = {Final {Report}}, title = {{NoiSI}: {Combustion} {Noise} and {Dynamics} of {Partially} {Premixed} {Flames}}, language = {en}, number = {PO 710/23-1}, institution = {DFG}, author = {Eder, Alexander J. and Polifke, Wolfgang and Silva, Camilo F. and Lahiri, Claus and Fischer, André}, year = {2024}, file = {Eder et al. - 2024 - NoiSI Combustion Noise and Dynamics of Partially .pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZQDZRKHR\\Eder et al. - 2024 - NoiSI Combustion Noise and Dynamics of Partially .pdf:application/pdf}, } @phdthesis{haeringer_symmetry-enhanced_2024, address = {München}, type = {Ph.{D}. {Thesis}}, title = {Symmetry-{Enhanced} {Hybrid} {Thermoacoustic} {Models} of {Annular} and {Can}-{Annular} {Combustors}}, language = {Englisch}, school = {TU München}, author = {Haeringer, Matthias}, year = {2024}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\8BGMQGSN\\Haeringer - 2024 - Experimentelle Untersuchung zur Erweiterung des Teillastbereiches einer stationären Gasturbine mit V.pdf:application/pdf}, } @article{EderMerk24a, title = {Model-based inference of flame transfer matrices from acoustic measurements in an aero-engine test rig}, volume = {147}, doi = {10.1115/1.4066366}, number = {3}, journal = {J. of Eng. for Gas Turbines and Power}, author = {Eder, Alexander J. and Merk, Moritz and Hollweck, Thomas and Fischer, André and Lahiri, Claus and Silva, Camilo F. and Polifke, Wolfgang}, year = {2025}, keywords = {MediaTUM}, pages = {031022}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\I6DAZ2QV\\Eder et al. - 2024 - Model-based inference of flame transfer matrices from acoustic measurements in an aero-engine test r.pdf:application/pdf}, } @phdthesis{schwarzott_investigating_2024, address = {Garching, Germany}, title = {Investigating the {Consistency} of {Neural} {Networks} for {Flame}-{Dynamics} {Modelling}}, school = {TU München}, author = {Schwarzott, Leon}, year = {2024}, note = {Supervisor: Zimmermann Axel}, file = {Semester_Thesis_Leon_Schwarzott_300724.pdf:C\:\\Users\\niebl\\Zotero\\storage\\UHIXZCSS\\Semester_Thesis_Leon_Schwarzott_300724.pdf:application/pdf}, } @article{VarilKaise24, title = {Linear analysis of a swirling jet with a realistic swirler model}, volume = {16}, url = {https://journals.sagepub.com/doi/10.1177/17568277241266827}, doi = {10.1177/17568277241266827}, number = {3}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Varillon, Grégoire and Kaiser, Thomas-Ludwig and Brokof, Philipp and Oberleithner, Kilian and Polifke, Wolfgang}, month = aug, year = {2024}, note = {tex.ids= VarilKaise24a}, keywords = {published, archived, MediaTUM}, pages = {186--199}, file = {varillon-et-al-2024-linear-analysis-of-a-swirling-jet-with-a-realistic-swirler-model.pdf:C\:\\Users\\niebl\\Zotero\\storage\\42LHL6N8\\varillon-et-al-2024-linear-analysis-of-a-swirling-jet-with-a-realistic-swirler-model.pdf:application/pdf}, } @techreport{KaiseVaril24, type = {Dynamik von {Drall} und {Strahlflammen} {II} - {Final} report}, title = {Dynamik von {Drall} und {Strahlflammen} {II} {FVV} {Nr}. 1421 {Abschlussbericht} ({AB})}, institution = {FVV}, author = {Kaiser, Thomas and Varillon, Grégoire}, month = aug, year = {2024}, note = {tex.ids= KaiseVaril24a}, file = {Abschlussbericht_SWJET_final.docx:C\:\\Users\\niebl\\Zotero\\storage\\2F5LL8CW\\Abschlussbericht_SWJET_final.docx:application/vnd.openxmlformats-officedocument.wordprocessingml.document;Kaiser and Varillon - Dynamik von Drall und Strahlflammen II FVV Nr. 142.pdf:C\:\\Users\\niebl\\Zotero\\storage\\35Q7I763\\Kaiser and Varillon - Dynamik von Drall und Strahlflammen II FVV Nr. 142.pdf:application/pdf;Kaiser et Varillon - 2024 - SWJET-FVV-Abschlussberichte.pdf:C\:\\Users\\niebl\\Zotero\\storage\\Y4ZSBTG4\\Kaiser et Varillon - 2024 - SWJET-FVV-Abschlussberichte.pdf:application/pdf}, } @phdthesis{Wohlr24, type = {Bachelor {Thesis}}, title = {Akustisch-konvektive Überlagerung in reagierenden {Scherschichtkonfigurationen}}, school = {TU München}, author = {Wohlrab, Ferdinand}, month = apr, year = {2024}, note = {Betreuer: Bonnaire}, file = {Wohlrab - 2024 - Akustisch-konvektive Überlagerung in reagierenden .pdf:C\:\\Users\\niebl\\Zotero\\storage\\VS5CSNQH\\Wohlrab - 2024 - Akustisch-konvektive Überlagerung in reagierenden .pdf:application/pdf}, } @inproceedings{VarilPolif25, address = {Corfu Greece}, title = {Resolvent {Analysis} of a {Laminar} {Premixed} {Swirl} {Flame}}, booktitle = {Proceeding of the 13th {Mediterranean} {Combustion} {Symposium}}, publisher = {The Combustion Institute}, author = {Varillon, Grégoire and Polifke, Wolfgang}, month = jun, year = {2025}, keywords = {published, submited}, file = {Varillon et Polifke - 2025 - RESOLVENT ANALYSIS OF A LAMINAR PREMIXED SWIRL FLA.pdf:C\:\\Users\\niebl\\Zotero\\storage\\GUP8ZCP6\\Varillon et Polifke - 2025 - RESOLVENT ANALYSIS OF A LAMINAR PREMIXED SWIRL FLA.pdf:application/pdf}, } @article{BrokoVaril24a, title = {Towards a momentum potential theory for reacting flows}, volume = {16}, issn = {1756-8277, 1756-8285}, url = {https://journals.sagepub.com/doi/10.1177/17568277241268810}, doi = {10.1177/17568277241268810}, abstract = {Mutual coupling of (thermofluiddynamic) modes of perturbations can affect the thermo-acoustic stability of combustors and contribute to combustion noise. For example, vortical or entropic perturbations can be transferred to acoustic perturbations if accelerated by the mean flow. The decomposition of perturbation fields into the respective modes and a linear description of their interactions in terms of fluctuating primitive variables is challenging. In contrast, Doak’s momentum potential theory promises an unambiguous decomposition in terms of momentum fluctuations, which is not limited to the linear regime. Whereas classical momentum potential theory takes into account hydrodynamic, acoustic and entropic modes in unconfined flows, the investigation of noise generation in combustion chambers requires the extension of the momentum potential theory to capture modes linked to the fluctuation of species mass fractions (“species mode”) arising from the change in chemical composition due to the reaction. Furthermore, a rigorous treatment of boundary conditions due to the confinement of the flow inside the combustor is required. The herein presented extension to reactive flows consists of two steps, (i) the formulation of a potential for momentum fluctuations related to species modes and (ii) identification of the total fluctuating enthalpy related to species modes. The extended theory is applied to post-process computational fluid dynamic simulation data of the propagation of entropy and species perturbations through one-dimensional ducts, nozzles and premixed flames. We find that although momentum potential theory offers a complete decomposition of momentum perturbations for reactive flows, the meaningful interpretation of this decomposition is rather challenging, even for non-reactive flows.}, language = {en}, number = {3}, urldate = {2024-12-02}, journal = {International Journal of Spray and Combustion Dynamics}, author = {Brokof, Philipp and Varillon, Grégoire and Inoue, Yasuhiko and Polifke, Wolfgang}, month = sep, year = {2024}, keywords = {published, archived, MediaTUM}, pages = {65--79}, file = {brokof-et-al-2024-towards-a-momentum-potential-theory-for-reacting-flows.pdf:C\:\\Users\\niebl\\Zotero\\storage\\DCPTHTPN\\brokof-et-al-2024-towards-a-momentum-potential-theory-for-reacting-flows.pdf:application/pdf}, } @phdthesis{Hofer24a, type = {Term paper}, title = {Harmonic {Balance} {Time} {Discretization} in {Finite} {Element} {Problems}}, language = {English}, school = {TU Munich}, author = {Hofer, Benedikt}, month = oct, year = {2024}, note = {Supervisors (UoC): Dr. Alexandros Kontogiannis, Ph. D. Prof. Matthew Juniper, Ph. D. Supervisors (TUM): M. Sc. Philipp Brokof Dr. Gregoire Varillon, Ph. D. Prof. Wolfgang Polifke, Ph. D.}, file = {Hofer - 2024 - Harmonic Balance Time Discretization in Finite Ele.pdf:C\:\\Users\\niebl\\Zotero\\storage\\AQT6M2CY\\Hofer - 2024 - Harmonic Balance Time Discretization in Finite Ele.pdf:application/pdf}, } @phdthesis{Merk25, address = {Munich, Germany}, type = {Ph.{D}. {Thesis}}, title = {Comprehensive and consistent models for the linear analysis of thermoacoustic phenomena}, language = {en}, school = {Technical University of Munich}, author = {Merk, Moritz}, year = {2025}, file = {Merk - 2024 - Comprehensive and consistent models for the linear.pdf:C\:\\Users\\niebl\\Zotero\\storage\\CLY57C55\\Merk - 2024 - Comprehensive and consistent models for the linear.pdf:application/pdf}, } @techreport{VarilKaise24b, type = {Final report}, title = {{SWJET} {Project} - {DFG} {Final} report}, institution = {DFG}, author = {Varillon, Grégoire and Kaiser, Thomas L.}, month = sep, year = {2024}, file = {Varillon and Kaiser - 2024 - SWJET Project - DFG Final report.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3P6C6J7W\\Varillon and Kaiser - 2024 - SWJET Project - DFG Final report.pdf:application/pdf}, } @mastersthesis{yao_reconstruction_2024, address = {München}, title = {Reconstruction of {Acoustic} {Systems}: {A} {Comparison} between {Physics}-{Informed} {Neural} {Network} and {Bayesian} {Approach}}, url = {http://dx.doi.org/10.13140/RG.2.2.30348.49285}, school = {TU München}, author = {Yao, Junting}, year = {2024}, note = {Betreuer: Silva}, file = {Yao - 2024 - Reconstruction of Acoustic Systems A Comparison b.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ZBKHGHC4\\Yao - 2024 - Reconstruction of Acoustic Systems A Comparison b.pdf:application/pdf}, } @misc{doan_learning_2020, title = {Learning {Hidden} {States} in a {Chaotic} {System}: {A} {Physics}-{Informed} {Echo} {State} {Network} {Approach}}, shorttitle = {Learning {Hidden} {States} in a {Chaotic} {System}}, url = {http://arxiv.org/abs/2001.02982}, abstract = {We extend the Physics-Informed Echo State Network (PIESN) framework to reconstruct the evolution of an unmeasured state (hidden state) in a chaotic system. The PI-ESN is trained by using (i) data, which contains no information on the unmeasured state, and (ii) the physical equations of a prototypical chaotic dynamical system. Non-noisy and noisy datasets are considered. First, it is shown that the PI-ESN can accurately reconstruct the unmeasured state. Second, the reconstruction is shown to be robust with respect to noisy data, which means that the PI-ESN acts as a denoiser. This paper opens up new possibilities for leveraging the synergy between physical knowledge and machine learning to enhance the reconstruction and prediction of unmeasured states in chaotic dynamical systems.}, language = {en}, urldate = {2024-11-15}, publisher = {arXiv}, author = {Doan, Nguyen Anh Khoa and Polifke, Wolfgang and Magri, Luca}, month = apr, year = {2020}, note = {arXiv:2001.02982 [eess]}, keywords = {Computer Science - Machine Learning, Electrical Engineering and Systems Science - Signal Processing}, annote = {Comment: 7 pages, 4 figures}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\C26GLAE5\\Doan et al. - 2020 - Learning Hidden States in a Chaotic System A Physics-Informed Echo State Network Approach.pdf:application/pdf}, } @article{HiestHaeri24a, title = {Comparison of non-premixed and premixed flamelets for ultra wet aero engine combustion conditions}, volume = {8}, doi = {https://doi.org/10.33737/jgpps/188264}, journal = {Journal of the Global Power and Propulsion Society}, author = {Hiestermann, Marian and Haeringer, Matthias and Dèsor, Marcel and Polifke, Wolfgang}, year = {2024}, note = {Publisher: Global Power and Propulsion Society}, keywords = {MediaTUM}, pages = {370--389}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\P5N2GJFJ\\Hiestermann et al. - 2024 - Comparison of non-premixed and premixed flamelets for ultra wet aero engine combustion conditions.pdf:application/pdf}, } @phdthesis{Romei24, type = {Bachelor {Thesis}}, title = {Numerical {Evaluation} of the {Driving} {Potential} for {High}-{Frequency} {Dynamics} in an {Axially} {Staged} {Combustion} {Chamber}}, school = {TU München}, author = {Romeikat, Sven}, month = sep, year = {2024}, note = {Betreuer: Bonnaire}, file = {Romeikat - 2024 - Numerical Evaluation of the Driving Potential for .pdf:C\:\\Users\\niebl\\Zotero\\storage\\9FGW2UB6\\Romeikat - 2024 - Numerical Evaluation of the Driving Potential for .pdf:application/pdf}, } @article{DesorHaeri24a, title = {Application of an {Improved} {Workflow} for the {Identification} of {Flame} {Dynamics} to {Swirl} {Stabilized} {Wet} {Combustion}}, volume = {147}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/doi/10.1115/1.4066364/1203560/Application-of-an-Improved-Workflow-for-the}, doi = {10.1115/1.4066364}, abstract = {Abstract The estimation of flame transfer functions (FTF) from time series data generated by large eddy simulation (LES) via system identification (SI) is an important element of thermoacoustic analysis. A continuous time series of adequate length is required to achieve low uncertainty, especially when dealing with turbulent noise. Limited scalability of LES codes implies that the wall-clock-time required for generating such time series may be excessive. The present paper tackles this challenge by exploring how the superposition of multiple simulations with the same excitation signal, but varying initial conditions, increases signal-to-noise ratio and leads to more robust identification. In addition, the established SI approach, which relies on broadband excitation, is compared to excitation with approximate Dirac and Heaviside signals, promising simpler pre- and postprocessing. Results demonstrate that the proposed workflow reduces significantly the wall-clock-time required for robust FTF identification. This reduction in wall-clock-time requires more parallel computational resources, but it does not significantly increase the overall computational cost while also enabling FTF estimation using Heaviside excitation. The proposed method is assessed on a partially premixed, steam enriched (‘WET’) swirl burner with significant turbulent noise levels. Steam enrichment is a combustion concept that reduces harmful emissions such as NOx and CO2 while increasing engine efficiency. However, the effect of steam on the flame response, needs to be better understood. To this end, a combustion model including an optimized global chemical mechanism for partially premixed wet methane combustion, is presented and validated against experimental data.}, language = {en}, number = {3}, urldate = {2024-09-26}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Désor, Marcel and Haeringer, Matthias and Hiestermann, Marian and Niebler, Korbinian Karl and Silva, Camilo F. and Polifke, Wolfgang}, year = {2025}, keywords = {archived, MediaTUM}, pages = {031003}, file = {Désor et al. - 2024 - Application of an Improved Workflow for the Identi.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HERGX8UQ\\Désor et al. - 2024 - Application of an Improved Workflow for the Identi.pdf:application/pdf}, } @inproceedings{NieblZimme25, address = {Trondheim, Norway}, title = {On the origin of time delays in the thermoacoustic response of a laminar slit flame}, abstract = {This paper investigates in detail the physical mechanisms of the thermoacoustic response of a laminar slit flame to perturbations. Special focus will hereby lie on the relevant time delays. We base our investigations on forced numerical simulations with various operating conditions, i.e., inlet velocity, water vapor content, and equivalence ratio are control parameters. By comparing the resulting Flame Transfer Functions (FTFs) and Finite Impulse Responses (FIRs), we find that flame length governs the characteristics of the FIR in two distinct ways: It impacts the time lag of the convective transport of disturbances along the flame. Moreover, with increasing flame length, the FIR shows a growing deviation from the expected shape of an initial peak followed by a single opposite-signed extremum before decay to zero. From data obtained by detailed Computational Fluid Dynamics (CFD) analysis, we relate that behavior to the onset of the restoration mechanism of the flame starting at the flame base. Based on this observation, we conclude that the FIR of such flames should be characterized by three dominant time lags. Accordingly, we infer a scaling for the time delays of this flame configuration. The approach is based on distributed time delay (DTD) models, which are fitted with a nonlinear optimization routine to flame transfer functions obtained by the numerical simulation. By dimensional analysis, we find identify a parameter space influencing the flame response of laminar slit flames and reduce them to a set of relevant non-dimensional Π-groups. With a strict focus on the time domain and by evaluating the DTD model parameters for the range of cases, we deduce scaling laws for all three time delays depending on convective transport phenomena.}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Niebler, Korbinian and Zimmermann, Axel and Désor, Marcel and Polifke, Wolfgang}, year = {2025}, keywords = {published}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\6N2M9UPV\\Niebler et al. - 2025 - On the origin of time delays in the thermoacoustic response of a laminar slit flame.pdf:application/pdf}, } @inproceedings{DoBrito25a, address = {Memphis, USA}, title = {On the {Generation} of {Entropy} {Waves} in the {Dilution} {Zone} of a {Rich}-{Quench}-{Lean} {Combustion} {Chamber}}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2025}, author = {Do, Thuy An and Brito Gadeschi, Ángel and Varillon, Grégoire and Jocher, Agnes}, month = jun, year = {2025}, keywords = {accepted, submitted}, file = {Do et al. - 2025 - ON THE GENERATION OF ENTROPY WAVES IN THE DILUTION.pdf:C\:\\Users\\niebl\\Zotero\\storage\\HSUQ7PHL\\Do et al. - 2025 - ON THE GENERATION OF ENTROPY WAVES IN THE DILUTION.pdf:application/pdf}, } @techreport{DesorPolif24, type = {Abschlussbericht {LuFo}-{VI} 2 {DINA2030plus}}, title = {Erstellung eines numerischen {Modells} zur {Ermittlung} von {Transferfunktionen} nasser {Flammen}}, author = {Desor, Marcel and Polifke, Wolfgang}, year = {2024}, file = {Desor und Polifke - 2024 - Erstellung eines numerischen Modells zur Ermittlun.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MC2J6Q8F\\Desor und Polifke - 2024 - Erstellung eines numerischen Modells zur Ermittlun.pdf:application/pdf}, } @phdthesis{Weissb25, type = {Bachelor {Thesis}}, title = {Validation of an eigenvalue solver for aeroacoustic}, school = {TU Munich, Professur für Thermofluiddynamik}, author = {Weißbach, Dominik}, month = jan, year = {2025}, note = {Betreuer: Grégoire Varillon}, file = {Weißbach - 2025 - Validation of an eigenvalue solver for aeroacousti.pdf:C\:\\Users\\niebl\\Zotero\\storage\\TBUFNPFZ\\Weißbach - 2025 - Validation of an eigenvalue solver for aeroacousti.pdf:application/pdf}, } @phdthesis{Schol25, type = {Bachelor {Thesis}}, title = {Comparison of shape optimization via the {Linearized} {Reactive} {Flow} against {Helmholtz} solvers}, school = {TU Munich, Professur für Thermofluiddynamik}, author = {Scholz, Karl}, month = jun, year = {2025}, note = {Betreuer: Grégoire Varillon, Philipp Brokof}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\Z8BE2ZB2\\Scholz - 2026 - Comparison of shape optimization via the Linearized Reactive Flow against Helmholtz solvers.pdf:application/pdf}, } @mastersthesis{Halda25, title = {Accurate prediction of flashback with {Conjugate} heat-transfer in the context of {Hydrogen} combustion}, school = {TU Munich, Professur für Thermofluiddynamik}, author = {Haldar, Amit Kumar}, month = jan, year = {2025}, note = {Betreuer: Marcel Désor, Grégoire Varillon}, file = {Haldar - 2025 - Simulation of turbulent flashback with conjugate h.pdf:C\:\\Users\\niebl\\Zotero\\storage\\8ER8X38C\\Haldar - 2025 - Simulation of turbulent flashback with conjugate h.pdf:application/pdf;Master_Thesis_Amit_Haldar.pptx:C\:\\Users\\niebl\\Zotero\\storage\\DSUMWG8R\\Master_Thesis_Amit_Haldar.pptx:application/vnd.openxmlformats-officedocument.presentationml.presentation}, } @article{VarilBroko25a, title = {Global linear analysis of the intrinsic thermoacoustic instability}, journal = {prepared for CnF}, author = {Varillon, Grégoire and Brokof, Philipp and Polifke, Wolfgang}, year = {2025}, keywords = {WIP}, file = {Varillon et al. - 2025 - Global linear analysis of the intrinsic thermoacou.pdf:C\:\\Users\\niebl\\Zotero\\storage\\QSA9ME8D\\Varillon et al. - 2025 - Global linear analysis of the intrinsic thermoacou.pdf:application/pdf}, } @article{GopinSuren25, title = {Hydrogen-blended fuels: {Nonlinear} flame dynamics and safe operation limits}, volume = {111}, issn = {03603199}, shorttitle = {Hydrogen-blended fuels}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0360319925007372}, doi = {10.1016/j.ijhydene.2025.02.172}, abstract = {This paper presents a two-part study on laminar hydrogen-blend flames in a micromix combustion test rig. The first part of the study focuses on the nonlinear dynamics of the flame, which is modelled by the G-equation. The laminar flame speed and the amplitude of convected velocity perturbations are the key parameters. Both have a marked effect on the travel times associated with the convected perturbations. These travel times are quantified and represented as functions of the laminar flame speed and the perturbation amplitude. The second part of the study considers a combustion test rig with the hydrogen-blend flame considered in the first part. A Green’s function approach is used to calculate the complex eigenfrequencies of the complete combustion system. The key parameters are the hydrogen concentration, equivalence ratio and amplitude of velocity fluctuations. The following regions are identified in this 3-D parameter space: regions of thermoacoustic instability, stable limit cycles and flame flashback. This information gives the safe operation limits.}, language = {en}, urldate = {2025-03-04}, journal = {International Journal of Hydrogen Energy}, author = {Gopinathan, Sreenath Malamal and Surendran, Aswathy and Heckl, Maria A.}, month = mar, year = {2025}, keywords = {MediaTUM}, pages = {371--384}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\LQ5MMRQW\\Gopinathan et al. - 2025 - Hydrogen-blended fuels Nonlinear flame dynamics and safe operation limits.pdf:application/pdf}, } @techreport{NieblPolif25, type = {Abschlussbericht {LuFo}-{VI} 3 {DINA2030plus}}, title = {Skalierungsregeln für die {Flammentransferfunktionen} turbulenter, nasser {Methandrallflammen}}, language = {de}, author = {Niebler, Korbinian and Polifke, Wolfgang}, year = {2025}, file = {Skalierungsregeln für die Flammentransferfunktion nasser Methan-Drallflammen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VUDB8DQV\\Niebler and Polifke - 2025 - Skalierungsregeln fu¨ r die Flammentransferfunktio.pdf:application/pdf}, } @mastersthesis{inoue_novel_2023, title = {A novel approach to the analysis of combustion noise : {Validation} of the momentum potential theory for mixtures in confined geometries}, author = {Inoue, Yasuhiko}, year = {2023}, file = {Inoue - 2023 - A novel approach to the analysis of combustion noi.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KPXH2VVA\\Inoue - 2023 - A novel approach to the analysis of combustion noi.pdf:application/pdf}, } @phdthesis{chikkamenahalli_jagadeesha_numerical_2024, type = {Semester {Thesis}}, title = {Numerical {Characterization} of the {Bifurcation} {Scenario} of an {Intrinsic} {Thermoacoustic} {Instability}: {Comparison} {Between} the {Flame} {Describing} {Function} {Approach} and {Unforced} {Nonlinear} {Simulations}}, author = {Chikkamenahalli Jagadeesha, Anuhya}, year = {2024}, file = {Chikkamenahalli Jagadeesha - 2024 - Numerical Characterization of the Bifurcation Scen.pdf:C\:\\Users\\niebl\\Zotero\\storage\\5V46I3X6\\Chikkamenahalli Jagadeesha - 2024 - Numerical Characterization of the Bifurcation Scen.pdf:application/pdf}, } @inproceedings{DoehnSilva25a, address = {London}, title = {Data {Driven} {Modeling} of the {Flame} {Response} using {Universal} {Differential} {Equations}}, url = {http://dx.doi.org/10.13140/RG.2.2.31030.82243}, booktitle = {Euromech {Colloquium} on {Data}-{Driven} {Fluid} {Dynamics} 2025}, author = {Doehner, Gregor and Silva, Camilo}, month = apr, year = {2025}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\NHGPANJU\\Doehner and Silva - 2025 - Data Driven Modeling of the Flame Response using Universal Differential Equations.pdf:application/pdf}, } @inproceedings{VarilBroko25, address = {Trondheim, Norway}, title = {Monolithic adjoint-based shape sensitivities from topology-preserving mesh perturbations}, doi = {10.13140/RG.2.2.25618.52160}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Varillon, Grégoire and Brokof, Philipp and Scholz, Karl and Polifke, Wolfgang}, month = sep, year = {2025}, keywords = {published, submitted (extended abstract)}, file = {VarilBroko25_SoTiCpaper_shapeOptimization-3.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7A8KSJMY\\VarilBroko25_SoTiCpaper_shapeOptimization-3.pdf:application/pdf;Varillon et al. - 2025 - Monolithic adjoint-based shape optimization from t.pdf:C\:\\Users\\niebl\\Zotero\\storage\\D7BSRYLH\\Varillon et al. - 2025 - Monolithic adjoint-based shape optimization from t.pdf:application/pdf}, } @inproceedings{UetreReinh25, address = {Memphis, USA}, series = {{GT2025}-153278}, title = {Assessment of a {Hybrid} {LES}-{CAA} {Method} for {Predicting} {Flame} {Responses} in {Swirl}-{Stabilized} {Combustion} {Under} {Various} {Acoustic} {Excitations}}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2025}, author = {Uetrecht, Florian Christoffer and Reinhardt, Hanna and Mocquard, Clément and Alanyalioglu, Cetin Ozan and Nicolai, Hendrik and Hassa, Christian}, month = jun, year = {2025}, keywords = {published}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\TVAKF6EL\\Uetrecht et al. - 2025 - Assessment of a Hybrid LES-CAA Method for Predicting Flame Responses in Swirl-Stabilized Combustion.pdf:application/pdf}, } @misc{osta_modelling_2025, title = {Modelling {Strategies} to {Identify} {Lean} {Hydrogen}/{Air} {Premixed} {Flame} {Response} through {Unsteady} {Flame} {Resolved} {Simulations}}, author = {Osta, Pablo}, month = mar, year = {2025}, file = {Osta - 2025 - Lean hydrogen/air flame response computation:C\:\\Users\\niebl\\Zotero\\storage\\VX8K3JZD\\Osta - 2025 - Modelling Strategies to Identify Lean HydrogenAir Premixed Flame Response through Unsteady Flame Re.pdf:application/pdf}, } @inproceedings{zimmermann_probabilistic_2025, title = {Probabilistic {Modeling} of {Nonlinear} {Flame} {Dynamics} with {Bayesian} {Neural} {Networks}}, abstract = {This study introduces Bayesian neural networks (BNN) as a model of nonlinear flame dynamics. Other than standard neural networks, BNN can quantify uncertainty in a tenable manner. Such uncertainty estimation is crucial for the reliable modeling of thermoacoustic combustion instabilities. A laminar premixed slit flame is studied, with BNNs trained on broadband-forced incompressible CFD simulation data. Analysis of BNN predictions based on broadband as well as harmonically forced data shows that BNNs can indicate a lack of data / physical information. The predicted flame-describing function uncertainties confirm previous reports that broadband-forced flames respond less nonlinearly than harmonically forced flames with similar forcing amplitudes. Uncertainty quantification also indicates that time series data generated with nonlinear broadband excitation contain only a small amount of linear information. Finally, it is demonstrated how BNNs can support an active learning strategy. To this end, a BNN model of nonlinear flame dynamics is coupled with an acoustic solver to predict the limit cycle of an intrinsic thermoacoustic instability. Uncertainties of the flame dynamics model propagate into an uncertain prediction of limit cycle amplitude. The mean predicted limit cycle velocity fluctuation is then used to retrain the BNN in order to improve the limit cycle prediction. Such an active learning strategy can be more data efficient than training the model with additional harmonic or broadband data.}, language = {en}, booktitle = {European {Combustion} {Meeting} {ECM2025}}, author = {Zimmermann, Axel and Desor, Marcel and Polifke, Wolfgang}, year = {2025}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\BVW4IFJG\\Zimmermann et al. - Probabilistic Modeling of Nonlinear Flame Dynamics with Bayesian Neural Networks.pdf:application/pdf}, } @inproceedings{OttinMocqu25, address = {Trondheim, Norway}, title = {A {State}-{Space} {Formulation} of a {3D} {Adjoint} {Helmholtz} {Solver}}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Ottinger, Joachim and Mocquard, Clément and Lahiri, Claus and Fischer, André and Polifke, Wolfgang}, year = {2025}, keywords = {published}, file = {ExtendedAbstract:C\:\\Users\\niebl\\Zotero\\storage\\GT4VKYU2\\Mocquard et al. - 2025 - A State-Space Formulation of a 3D Adjoint Helmholtz Solver.pdf:application/pdf;OttinMocqu25_SoTiC.pdf:C\:\\Users\\niebl\\Zotero\\storage\\VVUKKTUZ\\OttinMocqu25_SoTiC.pdf.pdf:application/pdf}, } @inproceedings{BrokoDougl25, address = {Trondheim, Norway}, title = {Global weakly nonlinear analysis of intrinsic thermoacoustic limit cycles}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} {SoTiC} 2025)}, author = {Brokof, Philipp and Douglas, Christopher M. and Polifke, Wolfgang}, year = {2025}, keywords = {published}, file = {BrokoDougl25_V2.pdf:C\:\\Users\\niebl\\Zotero\\storage\\2KCPDLLE\\BrokoDougl25_V2.pdf:application/pdf}, } @inproceedings{DesorShohd25, address = {Trondheim, Norway}, title = {Large {Eddy} {Simulation} of the {Thermoacoustic} {Response} of a {Premixed} {Partially} {Cracked} {Ammonia} {Flame}}, booktitle = {Symposium on {Thermoacoustics} in {Combustion}}, author = {Désor, Marcel and Shohdy, Nader N. and Lacoste, Deanna A. and Polifke, Wolfgang}, year = {2025}, keywords = {published}, file = {DesorShohdy25_extended_abstract_submitted_version.pdf:C\:\\Users\\niebl\\Zotero\\storage\\JZP96LD6\\DesorShohdy25_extended_abstract_submitted_version.pdf:application/pdf}, } @article{BonnaRomei25, title = {Thermoacoustic feedback mechanisms for premixed burners with a reacting hydrogen-methane jet in cross-flow}, volume = {283}, issn = {00102180}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0010218025005863}, doi = {10.1016/j.combustflame.2025.114549}, language = {en}, urldate = {2025-10-27}, journal = {Combustion and Flame}, author = {Bonnaire, Philip and Romeikat, Sven and Panek, Lukasz and Lammel, Oliver and Eigemann, Jonas and Kempf, Andreas and Polifke, Wolfgang}, month = jan, year = {2026}, keywords = {published}, pages = {114549}, file = {Bonnaire et al. - 2026 - Thermoacoustic Feedback Mechanisms for Premixed Burners with a Reacting Hydrogen-Methane Jet in Cro:C\:\\Users\\niebl\\Zotero\\storage\\73V4UMWE\\Bonnaire et al. - 2026 - Thermoacoustic Feedback Mechanisms for Premixed Burners with a Reacting Hydrogen-Methane Jet in Cro.pdf:application/pdf;CNF-D-25-00860_R2_SupplementaryMaterial.pdf:C\:\\Users\\niebl\\Zotero\\storage\\W4N77R3V\\CNF-D-25-00860_R2_SupplementaryMaterial.pdf:application/pdf}, } @phdthesis{Bikas22, type = {Bachelor {Thesis}}, title = {Phasors {Analysis} of a {Thermoacoustic} {Device}}, language = {en}, school = {Technical University of Munich}, author = {Bikas, Orpheas}, month = sep, year = {2022}, file = {Bikas - Phasors Analysis of a Thermoacoustic Device.pdf:C\:\\Users\\niebl\\Zotero\\storage\\7PJI68BL\\Bikas - Phasors Analysis of a Thermoacoustic Device.pdf:application/pdf}, } @article{VarilPolif25a, title = {Amplification of perturbations in a laminar premixed swirl flame with the resolvent analysis}, journal = {recommended for publication in International Journal of Spray and Combustion Dynamics}, author = {Varillon, Grégoire and Polifke, Wolfgang}, month = jun, year = {2025}, keywords = {submited}, file = {Varillon and Polifke - 2025 - Amplification of perturbations in a laminar premix.pdf:C\:\\Users\\niebl\\Zotero\\storage\\NLU265D9\\Varillon and Polifke - 2025 - Amplification of perturbations in a laminar premix.pdf:application/pdf}, } @article{zimmermann_probabilistic_2025-1, title = {Probabilistic {Modeling} of {Nonlinear} {Flame} {Dynamics} with {Bayesian} {Neural} {Networks}}, abstract = {This study introduces Bayesian neural networks (BNN) as a model of nonlinear flame dynamics. Other than standard neural networks, BNN can quantify uncertainty in a tenable manner. Such uncertainty estimation is crucial for the reliable modeling of thermoacoustic combustion instabilities. A laminar premixed slit flame is studied, with BNNs trained on broadband-forced incompressible CFD simulation data. Analysis of BNN predictions based on broadband as well as harmonically forced data shows that BNNs can indicate a lack of data / physical information. The predicted flame-describing function uncertainties confirm previous reports that broadband-forced flames respond less nonlinearly than harmonically forced flames with similar forcing amplitudes. Uncertainty quantification also indicates that time series data generated with nonlinear broadband excitation contain only a small amount of linear information. Finally, it is demonstrated how BNNs can support an active learning strategy. To this end, a BNN model of nonlinear flame dynamics is coupled with an acoustic solver to predict the limit cycle of an intrinsic thermoacoustic instability. Uncertainties of the flame dynamics model propagate into an uncertain prediction of limit cycle amplitude. The mean predicted limit cycle velocity fluctuation is then used to retrain the BNN in order to improve the limit cycle prediction. Such an active learning strategy can be more data efficient than training the model with additional harmonic or broadband data.}, language = {en}, journal = {Proceedings Combust. Inst.}, author = {Zimmermann, Axel and Desor, Marcel and Polifke, Wolfgang}, year = {2025}, } @phdthesis{senel_effect_2025, address = {Garching}, type = {Semester {Thesis}}, title = {Effect of the {Thickened} {Flame} {Model} {Formalism} on {Accurate} {Representation} of {Stretch} {Effects} in {Premixed} {H2}-{Air} {Flames}}, language = {English}, school = {TU München}, author = {Şenel, Enes Burak}, month = apr, year = {2025}, note = {Betreuer: Désor}, file = {Şenel - 2025 - Effect of the Thickened Flame Model Formalism on A.pdf:C\:\\Users\\niebl\\Zotero\\storage\\MMEX9FCP\\Şenel - 2025 - Effect of the Thickened Flame Model Formalism on A.pdf:application/pdf}, } @inproceedings{DoehnSilva25b, address = {Trondheim, Norway}, title = {Identification of characteristic time delays in the response of lean premixed {H2} / {CH4} flames using ordinary differential equations}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Doehner, Gregor and Silva, C. F.}, year = {2025}, keywords = {published}, file = {Doehner and Silva - 2025 - Identification of characteristic time delays in th.pdf:C\:\\Users\\niebl\\Zotero\\storage\\6AS6XIXY\\Doehner and Silva - 2025 - Identification of characteristic time delays in th.pdf:application/pdf}, } @phdthesis{Schro25, type = {Semester {Thesis}}, title = {The {Reynolds} {Transport} {Theorem} and its {Application} in {Deriving} {Fundamental} {Balance} {Equations} of {Thermo}-{Fluid} {Dynamics}}, school = {TU München}, author = {Schroff, Marvin}, year = {2025}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\4KTLFXMS\\Schroff - 2025 - The Reynolds Transport Theorem and its Application in Deriving Fundamental Balance Equations of Ther.pdf:application/pdf}, } @phdthesis{Wagne25, address = {Munich}, type = {Semester {Thesis}}, title = {Evaluation of mean {Temperature} {Profiles} from acoustic {Measurements} via {Physics} {Informed} {Neural} {Networks}}, school = {TU Munich}, author = {Wagner, Robert}, year = {2025}, note = {Betreuer: Silva}, file = {Wagner - 2025 - Evaluation of mean Temperature Profiles from acous.pdf:C\:\\Users\\niebl\\Zotero\\storage\\PSRE4K7B\\Wagner - 2025 - Evaluation of mean Temperature Profiles from acous.pdf:application/pdf}, } @phdthesis{Kim25, address = {Munich}, type = {Semester {Thesis}}, title = {Implementation and verification of one-step and two-step chemical kinetics mechanisms for reactive flow simulations in {JAX}-{Fluids}}, school = {TU Munich}, author = {Kim, Dohyeon}, year = {2025}, note = {Betruer: Silva}, file = {Kim - 2025 - Implementation and verification of one-step and tw.pdf:C\:\\Users\\niebl\\Zotero\\storage\\S7DJ8VEN\\Kim - 2025 - Implementation and verification of one-step and tw.pdf:application/pdf}, } @mastersthesis{Hollw25, title = {Adjoint-accelerated {Bayesian} {Inference} in a {3D} {Helmholtz} {Solver} for {Thermoacoustic} {Test} {Rigs}.}, school = {TU Munich}, author = {Hollweck, Thomas}, year = {2025}, note = {Betreuer: Silva}, file = {Hollweck - 2025 - Adjoint-accelerated Bayesian Inference in a 3D Hel.pdf:C\:\\Users\\niebl\\Zotero\\storage\\BZIBK9GZ\\Hollweck - 2025 - Adjoint-accelerated Bayesian Inference in a 3D Hel.pdf:application/pdf}, } @article{KomarPolif10, title = {Impact of {Swirl} {Fluctuations} on the {Flame} {Response} of a {Perfectly} {Premixed} {Swirl} {Burner}}, volume = {132}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/doi/10.1115/1.4000127/465478/Impact-of-Swirl-Fluctuations-on-the-Flame-Response}, doi = {10.1115/1.4000127}, abstract = {Combustion instabilities represent a long known problem in combustion technology. The complex interactions between acoustics and turbulent swirling flames are not fully understood yet, making it very difficult to reliably predict the stability of new combustion systems. For example, the effects of fluctuations of swirl number on the heat release of the flame have to be investigated in more detail. In this paper a perfectly premixed swirl stabilized burner with variable axial position of the swirl generator is investigated. In experiments, the position of the swirl generator has a strong impact on the dynamic flame response, although it does not influence the time-averaged distribution of the heat release significantly. This phenomenon is further investigated using computational fluid dynamics combined with system identification. The generation of fluctuations of swirl number, their propagation to the flame, and their effect on the dynamic flame response are examined. A simple model based on convective time lags is developed, showing good agreement with experiments.}, language = {en}, number = {6}, urldate = {2025-06-27}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Komarek, Thomas and Polifke, Wolfgang}, month = jun, year = {2010}, note = {tex.ids= KomarPolif10}, keywords = {Thermoacoustics, Swirl, Premixed flame, Frequency response, Rev'd}, pages = {061503}, file = {Komarek and Polifke - 2010 - Impact of Swirl Fluctuations on the Flame Response.pdf:C\:\\Users\\niebl\\Zotero\\storage\\M76FCGH3\\Komarek and Polifke - 2010 - Impact of Swirl Fluctuations on the Flame Response.pdf:application/pdf}, } @article{Kretz25, title = {Acrivos {Memorial} {Tribute}}, journal = {CCNY/ChemEng Newsletter}, author = {Kretzschmar, Ilona}, year = {2025}, } @inproceedings{Polif25, address = {Trondheim, Norway}, title = {On the importance of flame displacement in flow–flame– acoustic interactions}, doi = {10.13140/RG.2.2.20362.94406}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Polifke, Wolfgang}, year = {2025}, } @phdthesis{Dormu, type = {Semester {Thesis}}, title = {Modeling acoustically excited flame dynamics using neural differential equations}, school = {TUM}, author = {Dormuth, Tobias}, year = {2025}, note = {Supervisor: Axel Zimmermann}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\LGCDG56S\\muth - Modeling acoustically excited flame dynamics using neural differential equations.pdf:application/pdf}, } @inproceedings{ZimmeZhu25, address = {Trondheim, Norway}, title = {Bayesian {Inference} for {Inverse} {Thermoacoustic} {Problems} using a {Differentiable} {Acoustic} {Solver}}, booktitle = {Sotic 2025}, author = {Zimmermann, Axel and Zhu, Yanji and Désor, Marcel and Polifke, Wolfgang}, year = {2025}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\WAKIWG66\\Zimmermann et al. - Bayesian Inference for Inverse Thermoacoustic Problems using a Differentiable Acoustic Solver.pdf:application/pdf}, } @phdthesis{Serfa25, type = {Semester {Thesis}}, title = {Investigation of {Coupling} {Directions} for the {Thermoacoustic} {Feedback} {Loop} in an {Unstable} {Combustion} {System}}, school = {TU München}, author = {Serfaty Bayón, Daniel}, month = may, year = {2025}, note = {Betreuer: Bonnaire}, file = {Serfaty Bayón - 2025 - Investigation of Coupling Directions for the Therm.pdf:C\:\\Users\\niebl\\Zotero\\storage\\3LY29QB8\\Serfaty Bayón - 2025 - Investigation of Coupling Directions for the Therm.pdf:application/pdf}, } @inproceedings{ThiesDoehn25, address = {Trondheim, Norway}, title = {Hard constrained neural networks for the reconstruction of acoustic waves from pressure data}, author = {Thies, Lyn Jacob and Doehner, Gregor and Silva, C.F.}, year = {2025}, keywords = {published}, file = {Thies et al. - 2025 - Hard constrained neural networks for the reconstru.pdf:C\:\\Users\\niebl\\Zotero\\storage\\K9QMTW68\\Thies et al. - 2025 - Hard constrained neural networks for the reconstru.pdf:application/pdf}, } @inproceedings{UetreAlany25, address = {Trondheim, Norway}, title = {Simulation of thermoacoustic phenomena in an industrial aero-engine combustor with compressible {LES} and {CFD}/{SI} methods}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Uetrecht, Florian Christoffer and Alanyalioglu, Cetin Ozan and Garcia Guzman, Nicolas Mateo and Nicolai, Hendrik and Lahiri, Claus and Fischer, André and Polifke, Wolfgang and Hasse, Christian}, year = {2025}, keywords = {published}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\HPEKS597\\Uetrecht et al. - 2025 - Simulation of thermoacoustic phenomena in an industrial aero-engine combustor with compressible LES.pdf:application/pdf}, } @inproceedings{GarciMocqu25, address = {Trondheim, Norway}, title = {Identification of flame dynamics in a partially premixed combustor with compliant fuel injection}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Garcia, Nicolas M. and Mocquard, Clement and Désor, Marcel and Ottinger, Joachim and Polifke, Wolfgang}, year = {2025}, keywords = {published}, file = {GarciMocquard25-ConferencePaper:C\:\\Users\\niebl\\Zotero\\storage\\GP53AMIJ\\GarciMocquard25-ConferencePaper.pdf:application/pdf}, } @inproceedings{Silva25, address = {Trondheim, Norway}, title = {Output-only identification of thermoacoustic systems via generalized polynomial chaos}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Silva, C. F.}, year = {2025}, keywords = {published}, file = {Silva - 2025 - Output-only identification of thermoacoustic syste.pdf:C\:\\Users\\niebl\\Zotero\\storage\\ST42WVS8\\Silva - 2025 - Output-only identification of thermoacoustic syste.pdf:application/pdf}, } @inproceedings{HiestHaeri25, address = {TN,Memphis}, title = {Numerical {Demonstration} of {NO} {Emissions} {Reduction} by {Steam} {Injection} in the {Aero} {Engine} {Combustor} {IAE} {V2500}}, doi = {10.1115/GT2025-152037}, language = {English}, booktitle = {{ASME} {Turbo} {Expo} 2025: {Turbomachinery} {Technical} {Conference} and {Exposition}}, publisher = {ASME}, author = {Hiestermann, Marian and Haeringer, Matthias and Désor, Marcel and Niebler, Korbinian and Berger, Lukas}, month = aug, year = {2025}, note = {HiestHaeri25}, keywords = {published}, pages = {10}, file = {Hiestermann2025_Numerical_Demonstration_of_NO_Emissions_Reduction_By_Steam_Injection_in_the_Aero_Engine_Combustor_IAE_V2500.pdf:C\:\\Users\\niebl\\Zotero\\storage\\9X7M42S2\\Hiestermann2025_Numerical_Demonstration_of_NO_Emissions_Reduction_By_Steam_Injection_in_the_Aero_Engine_Combustor_IAE_V2500.pdf:application/pdf}, } @book{roy2001advances, title = {Advances in chemical propulsion: {Science} to technology}, publisher = {CRC Press}, author = {Roy, Gabriel D}, year = {2001}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\RR9E6GRD\\Roy - 2001 - Advances in chemical propulsion Science to technology.pdf:application/pdf}, } @inproceedings{ZimmeDesor25b, address = {Trondheim, Norway}, title = {Colored {Noise} {Modeling} for {Bayesian} {Flame} {Dynamics} {Inference}}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Zimmermann, Axel and Désor, Marcel and Polifke, Wolfgang}, month = aug, year = {2025}, keywords = {published}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\QU3E75K4\\Zimmermann et al. - 2025 - Colored Noise Modeling for Bayesian Flame Dynamics Inference.pdf:application/pdf}, } @inproceedings{DesorShohd08, address = {Trondheim, Norway}, title = {Large {Eddy} {Simulation} of the {Thermoacoustic} {Response} of {Premixed} {Partially} {Cracked} {Ammonia} {Flames}}, booktitle = {Symposium on {Thermoacoustics} in {Combustion} ({SoTiC} 2025)}, author = {Désor, Marcel and Shohdy, Nader N. and Lacoste, D.A. and Polifke, Wolfgang}, year = {2025}, keywords = {published online}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\C9SUI7BL\\Désor et al. - 2025 - Large Eddy Simulation of the Thermoacoustic Response of Premixed Partially Cracked Ammonia Flames.pdf:application/pdf}, } @article{VarilBroko, title = {Parameter-free adjoint-based shape sensitivities without {Hadamard}’s form}, abstract = {Journal version of the SoTiC '25 paper}, journal = {JCP or CMAME?}, author = {Varillon, Grégoire and Brokof, Philipp and Scholz, Karl and Polifke, Wolfgang}, keywords = {WIP}, } @phdthesis{Kippe, title = {Design and {Commissioning} of a {Test} {Rig} for {Experimental} {2D} {Characterization} of {Cryogenic} {Propellant} {Management} {Devices} under {Simulated} {Microgravity}}, author = {Kippenberg, TObiuas}, note = {Betreuer: A. Zimmermann; Felix Schily}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\F5SVCDBC\\Kippenberg - Design and Commissioning of a Test Rig for Experimental 2D Characterization of Cryogenic Propellant.pdf:application/pdf}, } @phdthesis{Werne25, type = {Semester {Thesis}}, title = {Untersuchung des {Einflusses} von {Kompressibilität} und {Symmetrierandbedingungen} auf die globale {Stabilitätsanalyse} von laminaren {Vormischflammen}}, author = {Werner, Niklas}, month = aug, year = {2025}, note = {Betreuer: Philipp}, file = {Werner - 2025 - Untersuchung des Einflusses von Kompressibilität u.pdf:C\:\\Users\\niebl\\Zotero\\storage\\KLV7FDGH\\Werner - 2025 - Untersuchung des Einflusses von Kompressibilität u.pdf:application/pdf}, } @inproceedings{DesorHalda26, title = {Large {Eddy} {Simulation} of {Premixed} {Hydrogen} {Flame} {Flashback} {Including} {Conjugate} {Heat} {Transfer} and {Soret} {Effect}}, booktitle = {Proceedings of {ASME} {Turbo} {Expo} 2026}, author = {Désor, Marcel and Haldar, Amit Kumar and Kosuch, Nikolai and Polifke, Wolfgang and Varillon, Grégoire}, year = {2026}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\VKE8RM7K\\Désor et al. - 2026 - Large Eddy Simulation of Premixed Hydrogen Flame Flashback Including Conjugate Heat Transfer and Sor.pdf:application/pdf}, } @inproceedings{NieblReine26, address = {Milano}, title = {Thermoacoustic similarity in a geometrically scaled lean-premixed swirl combustor}, booktitle = {{ASME} {Turbo} {Expo} 2026: {Turbomachinery} {Technical} {Conference} and {Exposition}}, author = {Niebler, Korbinian and Silva, Camilo F. and Reinert, Matthias and Tay-Wo-Chong, Luis and Polifke, Wolfgang}, year = {2026}, } @article{HoferDesor26, title = {Differentiable {CFD} for reactive flows}, journal = {Computer Methods in Applied Mechanics and Engineering}, author = {Hofer, Benedikt and Désor, Marcel and Zimmermann, Axel and {Polifke, Wolfgang}}, year = {2026}, keywords = {work-in-progress}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\6QBSTHHC\\Hofer et al. - 2025 - Differentiable CFD for reactive flows.pdf:application/pdf}, } @phdthesis{Kosuc25, address = {Garching}, type = {Semester {Thesis}}, title = {Investigation of {Boundary} {Layer} {Flashback} with {Conjugate} {Heat} {Transfer} for {H2} {Enriched} {Fuels}}, school = {Technical University of Munich}, author = {Kosuch, Nikolai}, month = oct, year = {2025}, note = {Betreuer: Désor/Varillon}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\YFKI647L\\Kosuch - 2025 - Investigation of Boundary Layer Flashback with Conjugate Heat Transfer for H2 Enriched Fuels.pdf:application/pdf}, } @article{Schwa08, title = {The importance of stupidity in scientific research}, volume = {121}, issn = {1477-9137, 0021-9533}, url = {https://journals.biologists.com/jcs/article/121/11/1771/30038/The-importance-of-stupidity-in-scientific-research}, doi = {10.1242/jcs.033340}, language = {en}, number = {11}, urldate = {2025-10-24}, journal = {Journal of Cell Science}, author = {Schwartz, Martin A.}, month = jun, year = {2008}, pages = {1771--1771}, file = {Full Text PDF:C\:\\Users\\niebl\\Zotero\\storage\\I3JTZ2L3\\Schwartz - 2008 - The importance of stupidity in scientific research.pdf:application/pdf}, } @book{Zimon, title = {Theory and {Model} of {Turbulent} {Flames} {Based} on {Kolmogorov}-type {Hypotheses}}, isbn = {978-93-48006-82-0}, url = {https://doi.org/10.9734/bpi/mono/978-93-48006-82-0}, author = {Zimont, V. L.}, year = {2024}, annote = {I am still alive and even published a monograph last year, which I am now sending to you. A monograph containing original results on turbulent premixed combustion obtained in the framework of Kolmogorov's hypothesis-driven approach in turbulence.   To make it clear, I will preface the commentary. The classical approach to turbulence and turbulent combustion comes from first principles: instantaneous equations - exact unclosed equations - closure methods for model development, etc. Recently, direct numerical simulation (DNS) of the instantaneous equations has become possible. In the field of turbulence, Kolmogorov proposed a hypothesis-driven alternative approach in which the Navier-Stokes equation was not even mentioned. He obtained results for small-scale turbulence, known in the literature as Kolmogorov  power laws, and phenomenologically formulated differential equations for large-scale turbulence. A surprising scientific fact is worth noting here. The Kolmogorov power laws obtained without using the Navier-Stokes equations characterize the structure of turbulence, which is described by the Navier-Stokes equations, about the solution of which for the turbulent regime at that time nobody could even dream about.  These solutions were obtained almost a hundred years later using the DNS method, and they confirmed Kolmogorov's conclusions. Interestingly, the Kolmogorov power laws, naturally obtained within the hypothesis-oriented approach, cannot be directly obtained within the classical approach. Now about the monograph whose results are original. It contains similar results obtained within the approach based on Kolmogorov-type hypotheses for turbulent combustion. The monograph consists of two parts: flame theory and combustion modeling. The theory of turbulent flame propagation in a homogeneous medium described by Kolmogorov turbulence theory. The results for the internal structure and global characteristics for different combustion regimes and propagation stages are described by power functions analogous to Kolmogorov's power laws in turbulence.  These theoretical results obtained for the constant density case were used to formulate a variable density turbulent combustion model for different combustion regimes and propagation stages. A variant of this model for the transient flame and the thickened flamelet combustion regine has found  a  practical application (an overview of the different applications is given in the last chapter). The appendix describes the approach used, based on Kolmogorov-type hypotheses.  Best regards Vladimir Zimont }, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\D5U7V4HC\\Zimont - 2024 - Theory and Model of Turbulent Flames Based on Kolmogorov-type Hypotheses.pdf:application/pdf}, } @article{HiestHaeri25a, title = {Numerical {Demonstration} of {NO} {Emissions} {Reduction} by {Steam} {Injection} in the {Aero} {Engine} {Combustor} {IAE} {V2500}}, issn = {0742-4795, 1528-8919}, url = {https://asmedigitalcollection.asme.org/gasturbinespower/article/doi/10.1115/1.4069724/1222078/NUMERICAL-DEMONSTRATION-OF-NO-EMISSIONS-REDUCTION}, doi = {10.1115/1.4069724}, abstract = {Abstract Reducing nitrogen oxides (NOx) emissions is a key objective in developing novel aero engines. The climate effect of NOx at high altitudes is significant despite regulations during the Landing and Takeoff (LTO) cycle. Various methods to reduce NOx formation in combustion chambers are under active research. This study examines the Water Enhanced Turbofan (WET) concept by MTU Aero Engines AG, which involves injecting steam into the combustion chamber. Steam injection can mitigate local temperature peaks, thereby reducing NOx formation. To investigate these effects under real aero engine conditions, the IAE V2500 combustor is analyzed using Large Eddy Simulations (LES) and the Flamelet-Generated Manifold (FGM) combustion model. Given that the chemical time scale of nitric oxide (NO) is much longer than that of major combustion species, an additional NO transport equation is solved, improving prediction accuracy. Three levels of steam injection are analyzed, with steam introduced into the diffuser before entering the combustor. The outlet temperature and thermal power remain constant, resulting in an increased global equivalence ratio with higher steam injection. The potential for NO reduction is demonstrated under cruise conditions. A higher steam content in the oxidizer effectively reduces temperature peaks and gradients, particularly in the rich combustion zone, leading to a notable decrease in NO emissions. While dominant NO formation occurs in the dilution zone for all cases, absolute NO values are considerably lower compared to the reference dry case, illustrating the potential to mitigate climate impact.}, language = {en}, urldate = {2025-10-21}, journal = {Journal of Engineering for Gas Turbines and Power}, author = {Hiestermann, Marian and Haeringer, Matthias and Désor, Marcel and Niebler, Korbinian Karl and Berger, Lukas}, month = sep, year = {2025}, pages = {1--28}, } @phdthesis{Reine25, address = {Garching, Germany}, type = {Semester {Thesis}}, title = {Identification and calibration of flame responses regarding geometry scaling}, language = {Eng}, school = {Technical University of Munich}, author = {Reinert, Matthias}, month = nov, year = {2025}, note = {Supervisor: Niebler}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\PKN2VPPE\\Reinert - Identification and calibration of flame responses regarding geometry scaling.pdf:application/pdf}, } @incollection{HecklArabi25, address = {Cham}, title = {Which {Frequency} {Bands} are {Responsible} for {Noise}-{Induced} {Triggering} of {Thermoacoustic} {Instabilities}?}, volume = {238}, isbn = {978-3-031-93917-4 978-3-031-93918-1}, url = {https://link.springer.com/10.1007/978-3-031-93918-1_20}, language = {en}, urldate = {2025-11-11}, booktitle = {Advances in {Continuum} {Physics}}, publisher = {Springer Nature Switzerland}, author = {Heckl, Maria A. and Arabi, Sadaf}, editor = {Fuhrmann, Jürgen and Hömberg, Dietmar and Müller, Wolfgang H. and Weiss, Wolf}, year = {2025}, doi = {10.1007/978-3-031-93918-1_20}, note = {Series Title: Advanced Structured Materials}, keywords = {published}, pages = {585--605}, file = {PDF:C\:\\Users\\niebl\\Zotero\\storage\\6A9K84VX\\Heckl and Arabi - 2025 - Which Frequency Bands are Responsible for Noise-Induced Triggering of Thermoacoustic Instabilities.pdf:application/pdf}, }