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Large eddy simulation of a H-2/N-2 lifted flame in a vitiated co-flow

Duwig, Christophe LU and Fuchs, Laszlo LU (2008) In Combustion Science and Technology 180(3). p.453-480
Abstract
A lifted turbulent H-2/N-2 flame in a vitiated co-flow is studied using Large Eddy Simulation together with a closure based on perfectly stirred reactors. A part of the closure, chemical look-up tables, are generated to close the filtered temperature equations and to compute local radical concentrations throughout the computational domain. The approach has been used to simulate a lifted turbulent flame. The results have been found to be insensitive to the combustion model employed and to the grid resolution. However, the results are very sensitive to the temperature of the co-flow stream and this result is well in line with previous findings. The numerical predictions were further compared to detailed experimental data obtained by Cabra et... (More)
A lifted turbulent H-2/N-2 flame in a vitiated co-flow is studied using Large Eddy Simulation together with a closure based on perfectly stirred reactors. A part of the closure, chemical look-up tables, are generated to close the filtered temperature equations and to compute local radical concentrations throughout the computational domain. The approach has been used to simulate a lifted turbulent flame. The results have been found to be insensitive to the combustion model employed and to the grid resolution. However, the results are very sensitive to the temperature of the co-flow stream and this result is well in line with previous findings. The numerical predictions were further compared to detailed experimental data obtained by Cabra et al. (2002). The agreement between the two sets of data is very good, indicating that the present approach predicts successfully the combustion process including the OH mass fractions. Finally, the LES data were used to study the flame dynamics and stabilization mechanisms. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
turbulent combustion, decomposition, proper orthogonal, non-premixed flames, large eddy simulation, lift-off
in
Combustion Science and Technology
volume
180
issue
3
pages
453 - 480
publisher
Taylor & Francis
external identifiers
  • wos:000252582900004
  • scopus:38649139842
ISSN
1563-521X
DOI
10.1080/00102200701741327
language
English
LU publication?
yes
id
6309bb71-da63-4c3d-9e9a-52e56faa01da (old id 1199172)
date added to LUP
2008-09-11 10:42:06
date last changed
2017-10-22 03:33:28
@article{6309bb71-da63-4c3d-9e9a-52e56faa01da,
  abstract     = {A lifted turbulent H-2/N-2 flame in a vitiated co-flow is studied using Large Eddy Simulation together with a closure based on perfectly stirred reactors. A part of the closure, chemical look-up tables, are generated to close the filtered temperature equations and to compute local radical concentrations throughout the computational domain. The approach has been used to simulate a lifted turbulent flame. The results have been found to be insensitive to the combustion model employed and to the grid resolution. However, the results are very sensitive to the temperature of the co-flow stream and this result is well in line with previous findings. The numerical predictions were further compared to detailed experimental data obtained by Cabra et al. (2002). The agreement between the two sets of data is very good, indicating that the present approach predicts successfully the combustion process including the OH mass fractions. Finally, the LES data were used to study the flame dynamics and stabilization mechanisms.},
  author       = {Duwig, Christophe and Fuchs, Laszlo},
  issn         = {1563-521X},
  keyword      = {turbulent combustion,decomposition,proper orthogonal,non-premixed flames,large eddy simulation,lift-off},
  language     = {eng},
  number       = {3},
  pages        = {453--480},
  publisher    = {Taylor & Francis},
  series       = {Combustion Science and Technology},
  title        = {Large eddy simulation of a H-2/N-2 lifted flame in a vitiated co-flow},
  url          = {http://dx.doi.org/10.1080/00102200701741327},
  volume       = {180},
  year         = {2008},
}