Numerical prediction of the Flame Describing Function and thermoacoustic limit cycle for a pressurised gas turbine combustor
File(s)
Accepted version
Author(s)
Xia, Yu
Laera, Davide
Jones, WP
Morgans, Aimee S
Type
Journal Article
Abstract
The forced flame responses in a pressurized gas turbine combustor are predicted using numerical reacting flow simulations. Two incompressible1 large eddy simulation solvers are used, applying two combustion models and two reaction schemes (4-step and 15-step) at two operating pressures (3 and 6 bar). Although the combustor flow field is little affected by these factors, the flame length and heat release rate are found to depend on combustion model, reaction scheme, and combustor pressure. The flame responses to an upstream velocity perturbation are used to construct the flame describing functions (FDFs). The FDFs exhibit smaller dependence on the combustion model and reaction chemistry than the flame shape and mean heat release rate. The FDFs are validated by predicting combustor thermoacoustic stability at 3 and 6 bar and, for the unstable 6 bar case, also by predicting the frequency and oscillation amplitude of the resulting limit cycle oscillation. All of these numerical predictions are in very good agreement with experimental measurements.
Date Issued
2019-06-03
Date Acceptance
2019-01-15
Citation
Combustion Science and Technology, 2019, 191 (5-6), pp.979-1002
ISSN
0010-2202
Publisher
Taylor & Francis
Start Page
979
End Page
1002
Journal / Book Title
Combustion Science and Technology
Volume
191
Issue
5-6
Copyright Statement
© 2019 Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in Combustion Science and Technology on 8 March 2019, available online: https://doi.org/10.1080/00102202.2019.1583221
Sponsor
Ghenadie Bulat
Engineering & Physical Science Research Council (EPSRC)
Siemens Industrial Turbomachinery Ltd
Commission of the European Communities
Grant Number
Siemens Industrial Turbomachinery
EP/K026801/1
See further info
FP7 - 305410
Subjects
Science & Technology
Physical Sciences
Technology
Thermodynamics
Energy & Fuels
Engineering, Multidisciplinary
Engineering, Chemical
Engineering
Thermoacoustic limit cycle
pressurized combustor
reaction chemistry
incompressible LES
flame describing function
LARGE-EDDY SIMULATION
SWIRLED FLAMES
LES
INSTABILITY
OSCILLATIONS
SATURATION
CHEMISTRY
FLOW
NO
Energy
0904 Chemical Engineering
0913 Mechanical Engineering
Publication Status
Published
Date Publish Online
2019-03-08