Transverse combustion instabilities: Acoustic, fluid mechanic, and flame processes

J O'Connor, V Acharya, T Lieuwen - Progress in Energy and Combustion …, 2015 - Elsevier
Thermoacoustic oscillations associated with transverse acoustic modes are routinely
encountered in combustion chambers. While a large literature on this topic exists for rockets …

Linear flow analysis inspired by mathematical methods from quantum mechanics

L Magri, PJ Schmid, JP Moeck - Annual Review of Fluid …, 2023 - annualreviews.org
Since its birth in the 1920s, quantum mechanics has motivated and advanced the analysis of
linear operators. In this effort, it significantly contributed to the development of sophisticated …

Dynamics and control of premixed combustion systems based on flame transfer and describing functions

T Schuller, T Poinsot, S Candel - Journal of Fluid Mechanics, 2020 - cambridge.org
This article describes recent progress on premixed flame dynamics interacting with acoustic
waves. Expressions are derived to determine the stability of combustors with respect to …

[HTML][HTML] The effect of hydrogen addition on the amplitude and harmonic response of azimuthal instabilities in a pressurized annular combustor

T Indlekofer, B Ahn, YH Kwah, S Wiseman… - Combustion and …, 2021 - Elsevier
The present work introduces an annular combustion chamber operated at intermediate
pressures. The combustor is operated with CH 4-H 2 blends leading to a variety of azimuthal …

An analytical model for azimuthal thermoacoustic modes in an annular chamber fed by an annular plenum

M Bauerheim, JF Parmentier, P Salas, F Nicoud… - Combustion and …, 2014 - Elsevier
This study describes an analytical method for computing azimuthal modes due to
flame/acoustics coupling in annular combustors. It is based on a quasi-one-dimensional …

Flame dynamics and unsteady heat release rate of self-excited azimuthal modes in an annular combustor

JR Dawson, NA Worth - Combustion and Flame, 2014 - Elsevier
This paper presents an experimental study into the structure and dynamics of the phase-
averaged heat release rate during self-excited spinning and standing azimuthal modes in an …

Flame describing function analysis of spinning and standing modes in an annular combustor and comparison with experiments

D Laera, T Schuller, K Prieur, D Durox… - Combustion and …, 2017 - Elsevier
This article reports a numerical analysis of combustion instabilities coupled by a spinning
mode or a standing mode in an annular combustor. The method combines an iterative …

Adjoint methods as design tools in thermoacoustics

L Magri - Applied Mechanics Reviews, 2019 - asmedigitalcollection.asme.org
In a thermoacoustic system, such as a flame in a combustor, heat release oscillations couple
with acoustic pressure oscillations. If the heat release is sufficiently in phase with the …

Linear growth rate estimation from dynamics and statistics of acoustic signal envelope in turbulent combustors

N Noiray - Journal of Engineering for Gas Turbines …, 2017 - asmedigitalcollection.asme.org
Considerable research and development efforts are required to meet the targets of future
gas turbine technologies in terms of performance, emissions, and operational flexibility. One …

High-frequency transverse combustion instabilities of lean-premixed multislit hydrogen-air flames

T Lee, KT Kim - Combustion and flame, 2022 - Elsevier
The present experimental investigation is concerned with combustion dynamics of lean-
premixed multislit hydrogen-air flames, with the aim of addressing some of the central …