Nonlinear response of a premixed low-swirl flame to acoustic excitation with large amplitude

W Liu, R Xue, L Zhang, Q Yang, H Wang - Combustion and Flame, 2022 - Elsevier
This paper describes an experimental investigation of the nonlinear response of a premixed
methane/air low-swirl flame to imposed acoustic excitation with perturbation amplitude up to …

Numerical prediction of the Flame Describing Function and thermoacoustic limit cycle for a pressurised gas turbine combustor

Y Xia, D Laera, WP Jones… - Combustion Science and …, 2019 - Taylor & Francis
The forced flame responses in a pressurized gas turbine combustor are predicted using
numerical reacting flow simulations. Two incompressible1 large eddy simulation solvers are …

The effect of stratification ratio on the macrostructure of stratified swirl flames: Experimental and numerical study

X Han, D Laera, AS Morgans… - … of Engineering for …, 2018 - asmedigitalcollection.asme.org
The present paper reports experimental and numerical analyses of the macrostructures
featured by a stratified swirling flame for varying stratification ratio (SR). The studies are …

Predicting instability frequency and amplitude using artificial neural network in a partially premixed combustor

S Kwak, J Choi, MC Lee, Y Yoon - Energy, 2021 - Elsevier
In this study, the frequency and amplitude of combustion instability were predicted using an
artificial neural network (ANN). Experimental data, obtained from a CH 4-fueled partially …

Dynamic response of a forced low-swirl premixed flame with acoustic excitation

W Liu, R Xue, L Zhang, Q Yang, H Wang - Flow, Turbulence and …, 2022 - Springer
This paper presents an experimental study on dynamic response of a forced low-swirl
methane/air premixed flame with external acoustic excitation over a wide range of driving …

Theoretical analysis of sound propagation and entropy generation across a distributed steady heat source

J Nan, J Li, AS Morgans, L Qin, L Yang - Journal of Sound and Vibration, 2022 - Elsevier
Acoustic and entropy waves interacting in a duct with a steady heat source and mean flow
are analysed using an asymptotic expansion (AE) for low frequencies. The analytical AE …

Thermoacoustic limit cycle predictions of a pressurised longitudinal industrial gas turbine combustor

Y Xia, D Laera, AS Morgans… - … Expo: Power for …, 2018 - asmedigitalcollection.asme.org
This article presents numerical prediction of a thermoacoustic limit cycle in an industrial gas
turbine combustor. The case corresponds to an experimental high pressure test rig …

The three-dimensional acoustic field in cylindrical and annular ducts with an axially varying mean temperature

J Li, AS Morgans, L Yang - Aerospace Science and Technology, 2020 - Elsevier
This paper presents analytical solutions for the three dimensional acoustic field in cylindrical
and annular ducts with dependence of mean temperature on axial position. A wave equation …

The effect of the corner recirculation zone on separated stratified swirling flames and combustion instabilities

H Song, X Han, Y Lin, C Zhang… - … Expo: Power for …, 2019 - asmedigitalcollection.asme.org
The present work investigates effects of the corner recirculation zone (CRZ) on flame
macrostructures and combustion instabilities in the Beihang Axial Swirler Independently …

SBES/FGM simulation of forced response of a premixed bluff-body stabilized flame

Y Xia, I Verma, K Zore, P Sharkey - AIAA Scitech 2020 Forum, 2020 - arc.aiaa.org
This paper describes numerical predictions of the forced heat release responses of a lean
premixed bluff-body stabilized ethylene/air flame, using the hybrid Stress-Blended Eddy …