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Study of flame stabilization in a swirling combustor using a new flamelet formulation

Duwig, Christophe LU and Fuchs, Laszlo LU (2005) In Combustion Science and Technology 177(8). p.1485-1510
Abstract
The dynamics in a swirl-stabilized flame is studied using large eddy simulation (LES). We account for the effect of turbulence on the flame through a model based on a filtered flamelet technique. The model provides a consistent and robust reaction-diffusion expression for simulating the correct propagation of premixed flames. The filtered flamelet formulation has been implemented into a high-order-accurate LES code and used to study the flame stabilization and the combustion dynamics in a gas-turbine combustion chamber. The effects of inlet boundary conditions, in terms of velocity and equivalence ratio radial profiles, have been studied. The flow is found to be very sensitive to small changes in terms of flame shapes and anchoring... (More)
The dynamics in a swirl-stabilized flame is studied using large eddy simulation (LES). We account for the effect of turbulence on the flame through a model based on a filtered flamelet technique. The model provides a consistent and robust reaction-diffusion expression for simulating the correct propagation of premixed flames. The filtered flamelet formulation has been implemented into a high-order-accurate LES code and used to study the flame stabilization and the combustion dynamics in a gas-turbine combustion chamber. The effects of inlet boundary conditions, in terms of velocity and equivalence ratio radial profiles, have been studied. The flow is found to be very sensitive to small changes in terms of flame shapes and anchoring position. The sensitivity of the results to the subgrid-scale flame thickness has also been investigated. The influence on the flame position is not significant. However, a too-large subgridscale flame thickness leads to different flame dynamics. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
gas turbine, flamelet, large eddy simulation, premixed combustion, swirling flow
in
Combustion Science and Technology
volume
177
issue
8
pages
1485 - 1510
publisher
Taylor & Francis
external identifiers
  • wos:000231077300004
  • scopus:23744431587
ISSN
1563-521X
DOI
10.1080/00102200590956669
language
English
LU publication?
yes
id
2a7ba403-27b8-4ee1-b0a5-5dd5b0eb8014 (old id 229321)
date added to LUP
2007-08-24 13:07:24
date last changed
2017-04-09 03:44:20
@article{2a7ba403-27b8-4ee1-b0a5-5dd5b0eb8014,
  abstract     = {The dynamics in a swirl-stabilized flame is studied using large eddy simulation (LES). We account for the effect of turbulence on the flame through a model based on a filtered flamelet technique. The model provides a consistent and robust reaction-diffusion expression for simulating the correct propagation of premixed flames. The filtered flamelet formulation has been implemented into a high-order-accurate LES code and used to study the flame stabilization and the combustion dynamics in a gas-turbine combustion chamber. The effects of inlet boundary conditions, in terms of velocity and equivalence ratio radial profiles, have been studied. The flow is found to be very sensitive to small changes in terms of flame shapes and anchoring position. The sensitivity of the results to the subgrid-scale flame thickness has also been investigated. The influence on the flame position is not significant. However, a too-large subgridscale flame thickness leads to different flame dynamics.},
  author       = {Duwig, Christophe and Fuchs, Laszlo},
  issn         = {1563-521X},
  keyword      = {gas turbine,flamelet,large eddy simulation,premixed combustion,swirling flow},
  language     = {eng},
  number       = {8},
  pages        = {1485--1510},
  publisher    = {Taylor & Francis},
  series       = {Combustion Science and Technology},
  title        = {Study of flame stabilization in a swirling combustor using a new flamelet formulation},
  url          = {http://dx.doi.org/10.1080/00102200590956669},
  volume       = {177},
  year         = {2005},
}