Intrinsic thermoacoustic instabilities

CF Silva - Progress in Energy and Combustion Science, 2023 - Elsevier
It is accepted that the thermoacoustic behavior of a given combustion system can be
analyzed by investigating how its natural acoustic modes are perturbed by the flame …

Modeling and analysis of premixed flame dynamics by means of distributed time delays

W Polifke - Progress in Energy and Combustion Science, 2020 - Elsevier
The unsteady response of a flame to acoustic or flow perturbations plays a crucial role in
thermoacoustic combustion instability. The majority of studies on this subject presents and …

On the spurious entropy generation encountered in hybrid linear thermoacoustic models

M Meindl, CF Silva, W Polifke - Combustion and Flame, 2021 - Elsevier
This work demonstrates that a hybrid approach for linear thermoacoustic stability analysis
that combines the Linearized Navier–Stokes Equations (LNSE) with a global Flame Transfer …

Low-order modeling to investigate clusters of intrinsic thermoacoustic modes in annular combustors

GJJ Fournier, M Haeringer… - … of Engineering for …, 2021 - asmedigitalcollection.asme.org
The intrinsic thermoacoustic (ITA) feedbackloop constitutes a coupling between flow, flame
and acoustics that does not involve the natural acoustic modes of the system. One recent …

A state-space formulation of a discontinuous Galerkin method for thermoacoustic stability analysis

M Meindl, A Albayrak, W Polifke - Journal of Sound and Vibration, 2020 - Elsevier
A hybrid approach for thermoacoustic stability analysis is formulated in a state-space
framework. The approach distinguishes between regions of the computational domain with …

[HTML][HTML] A spectral element-based reduced order model for thermoacoustic stability analysis in waveguides

D Passato, D Beli, IL Arteaga - Journal of Sound and Vibration, 2025 - Elsevier
A novel approach to perform linear stability analysis using a spectral element-based
reduced order model is proposed, thereby facilitating the comprehensive study of (thermo) …

[图书][B] Influence of water injection on the thermoacoustic stability of a lean-premixed combustor

N Stadlmair - 2018 - epc.ed.tum.de
Mein Dank gilt insbesondere meinem Doktorvater Herrn Professor Dr.-Ing. Thomas
Sattelmayer f ur die fachliche Betreuung der Arbeit und die ubernahme des Hauptreferats …

Determination of acoustic scattering matrices from linearized compressible flow equations with application to thermoacoustic stability analysis

M Meindl, M Merk, F Fritz, W Polifke - Journal of Theoretical and …, 2019 - World Scientific
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 …

Model-based inference of flame transfer matrices from acoustic measurements in an aero-engine test rig

AJ Eder, M Merk, T Hollweck… - … for Gas Turbines …, 2025 - asmedigitalcollection.asme.org
Flame dynamics, represented as a flame transfer matrix (FTM), is not directly measurable in
test rigs and must be deduced from transfer matrix measurements of the combustion system …

A Hybrid Adjoint Network Model for Thermoacoustic Optimization

F Schäfer, L Magri, W Polifke - … of Engineering for …, 2022 - asmedigitalcollection.asme.org
A method is proposed that allows the computation of the continuous adjoint of a
thermoacoustic network model based on the discretized direct equations. This hybrid …