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Large eddy simulation of unsteady combustion

Möller, Sven-Inge LU ; Lundgren, Ebbe LU and Fureby, Christer (1996) TWENTY-SIXTH SYMPOSIUM (INTERNATIONAL) ON COMBUSTION In Proceedings of the Combustion Institute 1-2. p.241-248
Abstract
The present study concerns the application of a large eddy simulation (LES) model, capable of dealing with chemical reactions described by multistep reaction mechanisms and thermal radiation. The LES model, based on prefiltering of the balance equations of mass, momentum, and energy contains a variety of submodels far representing the residual stress tensor and flux vectors and the filtered reaction rates. Here, we have focused on the influence of modeling of the filtered reaction rates. Three different reaction rate formulations have been investigated, the eddy dissipation kinetic model, a model based on the presumed PDF approach, and finally a monotonically integrated LES model that does not explicitly take subgrid scale effects into... (More)
The present study concerns the application of a large eddy simulation (LES) model, capable of dealing with chemical reactions described by multistep reaction mechanisms and thermal radiation. The LES model, based on prefiltering of the balance equations of mass, momentum, and energy contains a variety of submodels far representing the residual stress tensor and flux vectors and the filtered reaction rates. Here, we have focused on the influence of modeling of the filtered reaction rates. Three different reaction rate formulations have been investigated, the eddy dissipation kinetic model, a model based on the presumed PDF approach, and finally a monotonically integrated LES model that does not explicitly take subgrid scale effects into account. The predictive capabilities of the LES model have been investigated by numerical simulations of the flow past a triangular-shaped flame holder in a rectilinear channel at various operating conditions parameterized by the equivalence ratio, inlet velocity, and temperature. In simulations of reacting flow situations, the fuel was propane and premixed conditions were enforced. Detailed experimental measurements of all operating conditions including temperature probability density functions are available. Comparison of simulated and measured quantities indicates that the LES model is capable of predicting the flow accurately under all three operating conditions and that the movement of the flame front can be captured. Moreover, a discussion describing the dissimilar modes of operation found in the test rig is presented. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
BOUNDARY-CONDITIONS, BLUFF-BODY, FLOWS, FLAMES
in
Proceedings of the Combustion Institute
editor
Burgess, AR and Dryer, FL
volume
1-2
pages
241 - 248
publisher
COMBUSTION INSTITUTE, 5001 BAUM BLVD, SUITE 635, PITTSBURGH, PA 15213-1851 USA
conference name
TWENTY-SIXTH SYMPOSIUM (INTERNATIONAL) ON COMBUSTION
external identifiers
  • Other:IDS Number: BN87U
  • Scopus:0030365761
language
English
LU publication?
yes
id
ddbe8e07-9cc9-454a-a8ae-dd55f4299c49 (old id 1366913)
date added to LUP
2009-04-07 11:04:45
date last changed
2016-10-13 04:48:26
@misc{ddbe8e07-9cc9-454a-a8ae-dd55f4299c49,
  abstract     = {The present study concerns the application of a large eddy simulation (LES) model, capable of dealing with chemical reactions described by multistep reaction mechanisms and thermal radiation. The LES model, based on prefiltering of the balance equations of mass, momentum, and energy contains a variety of submodels far representing the residual stress tensor and flux vectors and the filtered reaction rates. Here, we have focused on the influence of modeling of the filtered reaction rates. Three different reaction rate formulations have been investigated, the eddy dissipation kinetic model, a model based on the presumed PDF approach, and finally a monotonically integrated LES model that does not explicitly take subgrid scale effects into account. The predictive capabilities of the LES model have been investigated by numerical simulations of the flow past a triangular-shaped flame holder in a rectilinear channel at various operating conditions parameterized by the equivalence ratio, inlet velocity, and temperature. In simulations of reacting flow situations, the fuel was propane and premixed conditions were enforced. Detailed experimental measurements of all operating conditions including temperature probability density functions are available. Comparison of simulated and measured quantities indicates that the LES model is capable of predicting the flow accurately under all three operating conditions and that the movement of the flame front can be captured. Moreover, a discussion describing the dissimilar modes of operation found in the test rig is presented.},
  author       = {Möller, Sven-Inge and Lundgren, Ebbe and Fureby, Christer},
  editor       = {Burgess, AR and Dryer, FL},
  keyword      = {BOUNDARY-CONDITIONS,BLUFF-BODY,FLOWS,FLAMES},
  language     = {eng},
  pages        = {241--248},
  publisher    = {ARRAY(0x6a19fc8)},
  series       = {Proceedings of the Combustion Institute},
  title        = {Large eddy simulation of unsteady combustion},
  volume       = {1-2},
  year         = {1996},
}