Dipl.-Ing. Stefan Jaensch

Dissertation

On the efficient numerical modeling of nonlinear self-excited thermoacoustic oscillations

Abgeschlossene Forschungsprojekte

Nonlinear Flame Dynamics

Publikationen

Polifke, W.; Merk, M.; Silva, C.; Jaensch, S.; Gaudron, R.; Gatti, M.; Mirat, C.; Schuller, T.: Identification of Combustion Noise and Flame Dynamics of Confined Turbulent Flames. Part II: Identification of Flame dynamics and Combustion Noise Source Terms. 17th International Conference on Numerical Combustion, 2019 mehr…
Schuller, T.; Gaudron, M.; Gatti, M.; Mirat, C.; Merk, M.; Silva, C.; Jaensch, S.; Polifke, W..;: Identification of Combustion Noise and Flame Dynamics of Confined Turbulent Flames. Part I: Methodology. 17th International Conference on Numerical Combustion, 2019 mehr…
Avdonin, A.; Jaensch, S.; Silva, C.F.; Češnovar, M.; Polifke, W.: Uncertainty quantification and sensitivity analysis of thermoacoustic stability with non-intrusive polynomial chaos expansion. Combustion and Flame 189, 2018, 300-310 mehr…
Merk, M.; Jaensch, S.; Silva, C.; Polifke, W.: Simultaneous identification of transfer functions and combustion noise of a turbulent flame. Journal of Sound and Vibration 422, 2018, 432-452 mehr…
Jaensch, S.; Merk, M.; Emmert, T.; Polifke, W.: Identification of flame transfer functions in the presence of intrinsic thermoacoustic feedback and noise. Combustion Theory and Modelling 22, 2018, 613-634 mehr…
Tudisco, P.; Ranjan, R.; Menon, S.; Jaensch, S.; Polifke, W.: Application of the Time-Domain Admittance Boundary Condition to Large-Eddy Simulation of Combustion Instability in a Shear-Coaxial, High Pressure Combustor. Flow, Turbulence and Combustion 99 (1), 2017, 185-207 mehr…
Jaensch, S.; Polifke, W.: Uncertainty encountered when modelling self-excited thermoacoustic oscillations with artificial neural networks. International Journal of Spray and Combustion Dynamics 9 (4), 2017, 367-379 mehr…
Emmert, T.; Bomberg, S.; Jaensch, S.; Polifke, W.: Acoustic and Intrinsic Thermoacoustic Modes of a Premixed Combustor. Proceedings of the Combustion Institute 36 (3), 2017, 3835-3842 mehr…
Jaensch, S.; Merk, M.; Gopalakrishnan, E.A.; Bomberg, S.; Emmert, T.; Sujith, R.I.; Polifke, W.: Hybrid CFD/Low-Order Modeling of Nonlinear Thermoacoustic Oscillations. Proceedings of the Combustion Institute 36 (3), 2017, 3827-3834 mehr…
Jaensch, S.; Polifke, W.: FVV Frühjahrstagung 2016 (Hrsg.): CFD-basierte, niedrigdimensionale Modellierung der nichtlinearen Dynamik von Vormischflammen – Abschlussbericht, Projekt Nr. 1115, Nichtlineare Flammendynamik. Band FVV-Heft Nr.1098. FVV, 2016 mehr…
Jaensch, S.; Sovardi, C.; Polifke, W.: On the robust, flexible and consistent implementation of time domain impedance boundary conditions for compressible flow simulations. Journal of Computational Physics 314, 2016, 145-159 mehr…
Sovardi, C.; Jaensch, S.; Polifke, W.: Concurrent identification of aero-acoustic scattering and noise sources at a flow duct singularity in low Mach number flow. Journal of Sound and Vibration 377, 2016, 90-105 mehr…
Merk, M.; Jaensch, S.; Polifke, W.: On Hydrodynamic Effects During Self-Excited Thermoacoustic Oscillations. 24th International Conference of Theoretical and Applied Mechanics, 2016ICTAM 2016 mehr…
Merk, M.; Jaensch, S.; Polifke, W.;: Concurrent identification of flame dynamics and combustion noise for turbulent flames. Second Colloquium on Combustion Dynamics and Combustion Noise, 2016, 1 mehr…
Jaensch, S.; Polifke, W.: CFD-basierte, Niedrigdimensionale Modellierung der Nichtlinearen Dynamik von Vormischflammen. Informationstagung Motoren/Turbomaschinen, 2016Bad Neuenahr, Germany mehr…
Lang, C.; Jaensch, S.; Albayrak, A.; Oberleithner, K.; Polifke, W.: Large Eddy Simulation of Equivalence Ratio Fluctuations in a Technically Premixed Swirl Combustor with Acoustic Excitation. Second colloquium on Combustion Dynamics and Combustion Noise, 2016 mehr…
Jaensch, S.; Merk, M.; Gopalakrishnan, E.; Bomberg, S.; Emmert, T.; Sujith, R I; Polifke, W.: Hybrid CFD/ low-order modeling of nonlinear thermoacoustic oscillations. 36th Int'l Symposium on Combustion, 2016 mehr…
Emmert, T.; Bomberg, S.; Jaensch, S.; Polifke, W.: Acoustic and Intrinsic Thermoacoustic Modes of a Premixed Combustor. 36th International Symposium on Combustion, 2016 mehr…
Silva, C. F.; Emmert, T.; Jaensch, S.; Polifke, W.: Numerical study on intrinsic thermoacoustic instability of a laminar premixed flame. Combustion and Flame 162 (9), 2015, 3370-3378 mehr…
Jaensch, S.; Merk, M.; Gopalakrishnan, E.; Bomberg, S.; Emmert, T.; Sujith, R I; Polifke, W.: Hybrid CFD/ low order modeling of thermoacoustic limit cycles. Sonderforschungsbereich/Transregio 40 - Summer Program Report 2015, 2015 mehr…
Silva, C. F.; Jaensch, S.; Emmert, T.; Polifke, W: On the autoregressive behavior of the intrinsic thermoacoustic feedback loop observed in premixed flames. Proceedings of the ICSV22, 2015 mehr…
Jaensch, S.; Emmert, T.; Sovardi, C.; Polifke, W.: Identification of Flame Transfer Functions in the Presence of Intrinsic Feedback and Noise. EFMC10 - 10th European Fluid Mechanics Conference, 2014 mehr…
Emmert, T.; Jaensch, S.; Sovardi, C.; Polifke, W.: taX - a Flexible Tool for Low-Order Duct Acoustic Simulation in Time and Frequency Domain. 7th Forum Acusticum, 2014 mehr…
Emmert, T.; Jaensch, S.; Sovardi, C.; Polifke, W.: taX - a Flexible Tool for Low-Order Duct Acoustic Simulation in Time and Frequency Domain. DEGA Workshop Fahrzeugakustik/Strömungsakustik, 2014 mehr…
Jaensch, S.; Polifke, W.: CFD-basierte, Niedrigdimensionale Modellierung der Nichtlinearen Dynamik von Vormischflammen. Informationstagung Turbomaschinen, Frühjahr 2014, 2014Zwischenbericht über das Vorhaben Nr. 1115, 1-29 mehr…
Sovardi, C.; Jaensch, S.; Silva, C.; Polifke, W.: Identification of Sound Sources in Internal ducted Flows: A Large Eddy Simulation -System Identification Approach. 21st International Congress on Sound and Vibration 2014, ICSV 2014, 2014 mehr…
Jaensch, S.; Emmert, T.; Silva, C.F.; Polifke, W.: A Grey-Box Identification Approach for Thermoacoustic Network Models. Proceedings of the ASME Turbo Expo 2014: Turbine Technical Conference and Exposition, 2014, 1-10 mehr…
Sovardi, C.; Jaensch, S.; Förner, K.; Selimefendigil, F.; Polifke, W.: Parametric vs. Nonparametric Identification of Nonlinear Acoustic Scattering at Duct Discontinuities based on LES data. Proceedings of the Summer School Program SFB TRR40, 2013Sonderforschungsbereich/Transregio 40 - Summer Program Report 2013 mehr…

Castagnotto, A.; Cruz Varona, M.; Emmert, T.; Jaensch, S.; Meindl, M.; Lohmann, B.; Polifke, W.: sss & sssMOR - Analyse und Reduktion dynamischer Systeme sehr hoher Ordnung. MATLAB Expo, 2016 mehr…
Panzer, H.; Jaensch, S.; Wolf, T.; Lohmann, B.: A Greedy Rational Krylov Method for H2-Pseudooptimal Model Order Reduction with Preservation of Stability. Proceedings of the American Control Conference, 2013 mehr…