Thermoacoustic Instability in Combustors

AS Morgans, D Yang - Annual Review of Fluid Mechanics, 2024 - annualreviews.org
Thermoacoustic instability is a flow instability that arises due to a two-way coupling between
acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude …

Impact of wall heat transfer in Large Eddy Simulation of flame dynamics in a swirled combustion chamber

PW Agostinelli, D Laera, I Boxx, L Gicquel… - Combustion and …, 2021 - Elsevier
Abstract Large Eddy Simulation (LES) is a fundamental research tool to study gas turbines
and aero-engine combustors. In LES, although rarely addressed systematically, it is known …

On the impact of H2-enrichment on flame structure and combustion dynamics of a lean partially-premixed turbulent swirling flame

PW Agostinelli, D Laera, I Chterev, I Boxx… - Combustion and …, 2022 - Elsevier
Abstract Large Eddy Simulation (LES) with Conjugate Heat Transfer (CHT) is used to
analyze the impact of H 2-enrichment on the flame structure and combustion dynamics of a …

[HTML][HTML] Impact of H2-enrichment on the response of a partially premixed CH4–air flame to velocity and equivalence ratio fluctuations

AM Garcia, S Le Bras, J Prager, I Boxx, W Polifke - Combustion and Flame, 2024 - Elsevier
The dynamics of hydrogen-enriched partially premixed methane–air flames are investigated,
focusing on the frequency response to velocity and equivalence ratio fluctuations. Large …

A combined oscillation cycle involving self-excited thermo-acoustic and hydrodynamic instability mechanisms

D Fredrich, WP Jones, AJ Marquis - Physics of Fluids, 2021 - pubs.aip.org
The paper examines the combined effects of several interacting thermo-acoustic and
hydrodynamic instability mechanisms that are known to influence self-excited combustion …

Multi-fuel combustion performance analysis and operating characteristics of a vortex-tube combustor

S Ren, WP Jones, X Wang - Energy, 2023 - Elsevier
In this work, an ultra-steady combustion technique was attempted to achieve fuel
adaptability combustion. The combustion performances of five representative gaseous fuels …

Period-2 thermoacoustics in a swirl-stabilised partially premixed flame computed using large eddy simulation

AD Kumar, JC Massey, M Stöhr, W Meier… - Flow, Turbulence and …, 2023 - Springer
A partially premixed swirl-stabilised flame under thermoacoustically unstable conditions is
studied using large eddy simulation with an unstrained flamelet model for the filtered …

An advanced vortex-tube technology for pure ammonia combustion with clean and steady peculiarity

S Ren, F Li, WP Jones, X Wang - Physics of Fluids, 2023 - pubs.aip.org
The present study investigates the combustion performance of pure ammonia in a stratified
vortex-tube reactive flow (SVRF) concerning stability limits, flame topology, pressure …

Compressible Large Eddy Simulation of Thermoacoustic Instabilities in the PRECCINSTA Combustor Using Flamelet Generated Manifolds With Dynamic Thickened …

S Gövert, JT Lipkowicz, B Janus - … of Engineering for …, 2024 - asmedigitalcollection.asme.org
The fully compressible, density-based CFD-solver TRACE has been extended for
simulations of turbulent reacting flows in aero engine gas turbine combustors. The flamelet …

Combustion dynamic stability analysis in stratified-rotation ethanol/air flame

S Ren, Y Lou, J Gao, WP Jones - Physics of Fluids, 2024 - pubs.aip.org
The flame-dynamic stability and internal mechanism in a stratified-rotation ethanol/air flame
are investigated through the utilization of a stratified vortex-tube combustor based on an …