Advanced

Study of a filtered flamelet formulation for large eddy simulation of premixed turbulent flames

Duwig, Christophe LU (2007) In Flow Turbulence and Combustion 79(4). p.433-454
Abstract
Despite significant advances in the understanding and modelling of turbulent combustion, no general model has been proposed for simulating flames in industrial combustion devices. Recently, the increase in computational possibilities has raised the hope of directly solving the large turbulent scales using large eddy simulation (LES) and capturing the important time-dependant phenomena. However, the chemical reactions involved in combustion occur at very small scales and the modelling of turbulent combustion processes is still required within the LES framework. In the present paper, a recently presented model for the LES of turbulent premixed flames is presented, analysed and discussed. The flamelet hypothesis is used to derive a filtered... (More)
Despite significant advances in the understanding and modelling of turbulent combustion, no general model has been proposed for simulating flames in industrial combustion devices. Recently, the increase in computational possibilities has raised the hope of directly solving the large turbulent scales using large eddy simulation (LES) and capturing the important time-dependant phenomena. However, the chemical reactions involved in combustion occur at very small scales and the modelling of turbulent combustion processes is still required within the LES framework. In the present paper, a recently presented model for the LES of turbulent premixed flames is presented, analysed and discussed. The flamelet hypothesis is used to derive a filtered source term for the filtered progress variable equation. The model ensures proper flame propagation. The effect of subgrid scale (SGS) turbulence on the flame is modelled through the flame-wrinkling factor. The present modelling of the source term is successfully tested against filtered direct numerical simulation (DNS) data of a V-shape flame. Further, a premixed turbulent flame, stabilised behind an expansion, is simulated. The predictions agree well with the available experimental data, showing the capabilities of the model for performing accurate simulations of unsteady premixed flames. (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
turbulent premixed combustion, karge eddy simulation, flamelet model, filtered flame
in
Flow Turbulence and Combustion
volume
79
issue
4
pages
433 - 454
publisher
Springer
external identifiers
  • wos:000250883000005
  • scopus:36148980781
ISSN
1573-1987
DOI
10.1007/s10494-007-9107-1
language
English
LU publication?
yes
id
a478f955-9dd5-41d7-a5bc-b7ab441b2c00 (old id 971934)
date added to LUP
2008-01-29 14:41:29
date last changed
2017-11-05 03:43:17
@article{a478f955-9dd5-41d7-a5bc-b7ab441b2c00,
  abstract     = {Despite significant advances in the understanding and modelling of turbulent combustion, no general model has been proposed for simulating flames in industrial combustion devices. Recently, the increase in computational possibilities has raised the hope of directly solving the large turbulent scales using large eddy simulation (LES) and capturing the important time-dependant phenomena. However, the chemical reactions involved in combustion occur at very small scales and the modelling of turbulent combustion processes is still required within the LES framework. In the present paper, a recently presented model for the LES of turbulent premixed flames is presented, analysed and discussed. The flamelet hypothesis is used to derive a filtered source term for the filtered progress variable equation. The model ensures proper flame propagation. The effect of subgrid scale (SGS) turbulence on the flame is modelled through the flame-wrinkling factor. The present modelling of the source term is successfully tested against filtered direct numerical simulation (DNS) data of a V-shape flame. Further, a premixed turbulent flame, stabilised behind an expansion, is simulated. The predictions agree well with the available experimental data, showing the capabilities of the model for performing accurate simulations of unsteady premixed flames.},
  author       = {Duwig, Christophe},
  issn         = {1573-1987},
  keyword      = {turbulent premixed combustion,karge eddy simulation,flamelet model,filtered flame},
  language     = {eng},
  number       = {4},
  pages        = {433--454},
  publisher    = {Springer},
  series       = {Flow Turbulence and Combustion},
  title        = {Study of a filtered flamelet formulation for large eddy simulation of premixed turbulent flames},
  url          = {http://dx.doi.org/10.1007/s10494-007-9107-1},
  volume       = {79},
  year         = {2007},
}