Spontaneous and explicit symmetry breaking of thermoacoustic eigenmodes in imperfect annular geometries
T Indlekofer, A Faure-Beaulieu, JR Dawson… - Journal of Fluid …, 2022 - cambridge.org
This article deals with the symmetry breaking of azimuthal thermoacoustic modes in annular
combustors. Using a nominally symmetric annular combustor, we present experimental …
combustors. Using a nominally symmetric annular combustor, we present experimental …
Symmetry-breaking in thermoacoustics: theory and experimental validation on an annular system with electroacoustic feedback
SC Humbert, JP Moeck, CO Paschereit… - Journal of Sound and …, 2023 - Elsevier
In this study, we investigate experimentally the linear and nonlinear thermoacoustic
response of an annular combustor model with electroacoustic feedback to study the effects …
response of an annular combustor model with electroacoustic feedback to study the effects …
Flame transfer functions and dynamics of a closely confined premixed bluff body stabilized flame with swirl
The flame transfer function (FTF) and flame dynamics of a highly swirled, closely confined,
premixed flame is studied over a wide range of equivalence ratios and bulk velocities at a …
premixed flame is studied over a wide range of equivalence ratios and bulk velocities at a …
Combustion dynamics of annular systems
New results on the dynamics of annular combustors during ignition and combustion
instabilities will be reviewed. Ignition dynamics is considered first by examining experiments …
instabilities will be reviewed. Ignition dynamics is considered first by examining experiments …
[HTML][HTML] Azimuthal flame response and symmetry breaking in a forced annular combustor
In the current study azimuthal forcing of an annular combustor with swirling flames has been
performed to present for the first time the Heat Release Rate (HRR) response to all possible …
performed to present for the first time the Heat Release Rate (HRR) response to all possible …
Averaging of thermoacoustic azimuthal instabilities
G Ghirardo, F Gant - Journal of Sound and Vibration, 2021 - Elsevier
We consider the acoustic flow field of rotationally symmetric systems, like an annular
combustor and the flow in a round duct, in absence of a mean azimuthal flow field. We focus …
combustor and the flow in a round duct, in absence of a mean azimuthal flow field. We focus …
Symmetry breaking in an experimental annular combustor model with deterministic electroacoustic feedback and stochastic forcing
SC Humbert, A Orchini… - … of Engineering for …, 2023 - asmedigitalcollection.asme.org
In this study, we use an annular combustor experimental model with electroacoustic
feedback to investigate systematically the effect of stochastic forcing and nonuniform flame …
feedback to investigate systematically the effect of stochastic forcing and nonuniform flame …
[HTML][HTML] Symmetry breaking modelling for azimuthal combustion dynamics
Annular combustors can exhibit azimuthal thermoacoustic instabilities, which can rotate as a
spinning wave at the speed of sound in the azimuthal direction, oscillate as a standing wave …
spinning wave at the speed of sound in the azimuthal direction, oscillate as a standing wave …
Transient thermo-acoustic responses of methane/hydrogen flames in a pressurized annular combustor
The present article experimentally investigates the triggering and transient growth of
azimuthal instabilities in a pressurized laboratory-scale annular combustor featuring 12 …
azimuthal instabilities in a pressurized laboratory-scale annular combustor featuring 12 …
[HTML][HTML] Tomographic reconstruction of an azimuthally forced flame in an annular chamber
Azimuthally forced spinning modes on a single ethylene-air swirl flame in an annular
combustor were investigated using phase-averaged three-dimensional (3D) Computed …
combustor were investigated using phase-averaged three-dimensional (3D) Computed …