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Experimental and numerical study of a conical turbulent partially premixed flame

Li, Bo LU ; Baudoin, Eric LU ; Yu, Rixin LU ; Sun, Zhiwei LU ; Li, Zhongshan LU ; Bai, Xue-Song LU ; Aldén, Marcus LU and Mansour, M. S. (2009) In Proceedings of the Combustion Institute2000-01-01+01:00 32. p.1811-1818
Abstract
The structure and dynamics of a turbulent partially premixed methane/air flame in a conical burner were investigated using laser diagnostics and large-eddy simulations (LES). The flame structure inside the cone was charecterized in detail using LES based on a two-scalar flamelet model, with the mixture fraction for the mixing field and level-set G-function for the partially premixed flame front propagation. In addition, planar laser induced florescence (PLIF) of CH and chemiluminiscence imaging with high speed video were performed through a glass cone. CH and CH2O PLIF were also used to examine the flame structures above the cone. It is shown that in the entire flame the CH layer remains very thin, whereas the CH2O layer is rather thick.... (More)
The structure and dynamics of a turbulent partially premixed methane/air flame in a conical burner were investigated using laser diagnostics and large-eddy simulations (LES). The flame structure inside the cone was charecterized in detail using LES based on a two-scalar flamelet model, with the mixture fraction for the mixing field and level-set G-function for the partially premixed flame front propagation. In addition, planar laser induced florescence (PLIF) of CH and chemiluminiscence imaging with high speed video were performed through a glass cone. CH and CH2O PLIF were also used to examine the flame structures above the cone. It is shown that in the entire flame the CH layer remains very thin, whereas the CH2O layer is rather thick. The flame is stabilized inside the cone a short distance above the nozzle. The stabilization of the flame can be simulated by the triple-flame model but not the flamelet-quenching model. The results show that flame stabilization in the cone is a result of premixed flame front propagation and flow reversal near the wall of the cone which is deemed to be dependent on the cone angle. Flamelet based LES is shown to capture the measured CH structures whereas the predicted CH2O structure is some-what thinner than the experiments. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Laser diagnostics, Partially premixed flame, Conical burner, Large-eddy, simulation
in
Proceedings of the Combustion Institute2000-01-01+01:00
volume
32
pages
1811 - 1818
publisher
Elsevier
external identifiers
  • wos:000264756900022
  • scopus:61849182438
ISSN
1540-7489
DOI
10.1016/j.proci.2008.06.088
language
English
LU publication?
yes
id
7a764176-ceca-4670-b16a-216f3df88d51 (old id 1400902)
date added to LUP
2009-06-12 10:09:39
date last changed
2017-07-23 03:38:51
@article{7a764176-ceca-4670-b16a-216f3df88d51,
  abstract     = {The structure and dynamics of a turbulent partially premixed methane/air flame in a conical burner were investigated using laser diagnostics and large-eddy simulations (LES). The flame structure inside the cone was charecterized in detail using LES based on a two-scalar flamelet model, with the mixture fraction for the mixing field and level-set G-function for the partially premixed flame front propagation. In addition, planar laser induced florescence (PLIF) of CH and chemiluminiscence imaging with high speed video were performed through a glass cone. CH and CH2O PLIF were also used to examine the flame structures above the cone. It is shown that in the entire flame the CH layer remains very thin, whereas the CH2O layer is rather thick. The flame is stabilized inside the cone a short distance above the nozzle. The stabilization of the flame can be simulated by the triple-flame model but not the flamelet-quenching model. The results show that flame stabilization in the cone is a result of premixed flame front propagation and flow reversal near the wall of the cone which is deemed to be dependent on the cone angle. Flamelet based LES is shown to capture the measured CH structures whereas the predicted CH2O structure is some-what thinner than the experiments.},
  author       = {Li, Bo and Baudoin, Eric and Yu, Rixin and Sun, Zhiwei and Li, Zhongshan and Bai, Xue-Song and Aldén, Marcus and Mansour, M. S.},
  issn         = {1540-7489},
  keyword      = {Laser diagnostics,Partially premixed flame,Conical burner,Large-eddy,simulation},
  language     = {eng},
  pages        = {1811--1818},
  publisher    = {Elsevier},
  series       = {Proceedings of the Combustion Institute2000-01-01+01:00},
  title        = {Experimental and numerical study of a conical turbulent partially premixed flame},
  url          = {http://dx.doi.org/10.1016/j.proci.2008.06.088},
  volume       = {32},
  year         = {2009},
}