Transverse combustion instabilities: Acoustic, fluid mechanic, and flame processes
Thermoacoustic oscillations associated with transverse acoustic modes are routinely
encountered in combustion chambers. While a large literature on this topic exists for rockets …
encountered in combustion chambers. While a large literature on this topic exists for rockets …
Linear flow analysis inspired by mathematical methods from quantum mechanics
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 …
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
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 …
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 …
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
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/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
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 …
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
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 …
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 …
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 …
gas turbine technologies in terms of performance, emissions, and operational flexibility. One …
High-frequency transverse combustion instabilities of lean-premixed multislit hydrogen-air flames
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 …
premixed multislit hydrogen-air flames, with the aim of addressing some of the central …