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Flame stabilization in a supersonic combustor with hydrogen injection upstream of cavity flame holders: experiments and simulations

Sun, M-B; Wu, H-Y; Fan, Z-Q; Wang, H-B; Bai, Xue-Song LU ; Wang, Z-G; Liang, J-H and Liu, W-D (2011) In Proceedings of the Institution of Mechanical Engineers. Part G: Journal of Aerospace Engineering 225(G12). p.1351-1365
Abstract
Experimental observations and numerical simulation were conducted to study the flame characteristics and flame stabilization mechanism in a supersonic combustor with hydrogen injection upstream of cavity flame holders. OH radical distribution of the reacting flowfield was obtained using OH spontaneous emission and OH-PLIF (planar laser-induced fluorescence). The supersonic combustion flowfield with L/D = 7 cavity was calculated by large eddy simulation. The turbulence-combustion interaction model was based on a partially premixed flamelet model with a level-set approach. The results showed that hydrogen fuels were transported into the cavity shear; lean mixture and rich mixture were produced in the internal cavity and the declining jet,... (More)
Experimental observations and numerical simulation were conducted to study the flame characteristics and flame stabilization mechanism in a supersonic combustor with hydrogen injection upstream of cavity flame holders. OH radical distribution of the reacting flowfield was obtained using OH spontaneous emission and OH-PLIF (planar laser-induced fluorescence). The supersonic combustion flowfield with L/D = 7 cavity was calculated by large eddy simulation. The turbulence-combustion interaction model was based on a partially premixed flamelet model with a level-set approach. The results showed that hydrogen fuels were transported into the cavity shear; lean mixture and rich mixture were produced in the internal cavity and the declining jet, respectively. An approximately steady partially premixed flame front exists in the cavity shear layer. The flame front propagates and extends to the region around the fuel jet due to the interaction of counter-rotating vortices induced by the jet with the cavity shear layer. The flame front sustained in the shear layer likely penetrates the jet core and ignites the whole jet. Behind the flame front, most of the jet beam is burned as diffusion flames. The physical process of the flame stabilization demonstrated the similarity with triple flame characteristics, which indicted that triple flame theory might be the basic flame stabilization mechanism of the cavity flame holders. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
flame stabilization, cavity flameholder, large eddy simulation, partially premixed flamelet model, triple flame
in
Proceedings of the Institution of Mechanical Engineers. Part G: Journal of Aerospace Engineering
volume
225
issue
G12
pages
1351 - 1365
publisher
SAGE Publications Inc.
external identifiers
  • wos:000298987200006
ISSN
0954-4100
DOI
10.1177/0954410011401498
language
English
LU publication?
yes
id
009643d1-5901-489e-9ee5-da56a27aecb7 (old id 2307002)
date added to LUP
2012-02-07 10:43:19
date last changed
2016-04-15 22:12:35
@article{009643d1-5901-489e-9ee5-da56a27aecb7,
  abstract     = {Experimental observations and numerical simulation were conducted to study the flame characteristics and flame stabilization mechanism in a supersonic combustor with hydrogen injection upstream of cavity flame holders. OH radical distribution of the reacting flowfield was obtained using OH spontaneous emission and OH-PLIF (planar laser-induced fluorescence). The supersonic combustion flowfield with L/D = 7 cavity was calculated by large eddy simulation. The turbulence-combustion interaction model was based on a partially premixed flamelet model with a level-set approach. The results showed that hydrogen fuels were transported into the cavity shear; lean mixture and rich mixture were produced in the internal cavity and the declining jet, respectively. An approximately steady partially premixed flame front exists in the cavity shear layer. The flame front propagates and extends to the region around the fuel jet due to the interaction of counter-rotating vortices induced by the jet with the cavity shear layer. The flame front sustained in the shear layer likely penetrates the jet core and ignites the whole jet. Behind the flame front, most of the jet beam is burned as diffusion flames. The physical process of the flame stabilization demonstrated the similarity with triple flame characteristics, which indicted that triple flame theory might be the basic flame stabilization mechanism of the cavity flame holders.},
  author       = {Sun, M-B and Wu, H-Y and Fan, Z-Q and Wang, H-B and Bai, Xue-Song and Wang, Z-G and Liang, J-H and Liu, W-D},
  issn         = {0954-4100},
  keyword      = {flame stabilization,cavity flameholder,large eddy simulation,partially premixed flamelet model,triple flame},
  language     = {eng},
  number       = {G12},
  pages        = {1351--1365},
  publisher    = {SAGE Publications Inc.},
  series       = {Proceedings of the Institution of Mechanical Engineers. Part G: Journal of Aerospace Engineering},
  title        = {Flame stabilization in a supersonic combustor with hydrogen injection upstream of cavity flame holders: experiments and simulations},
  url          = {http://dx.doi.org/10.1177/0954410011401498},
  volume       = {225},
  year         = {2011},
}