Numerical investigation of thermal diffusion influence on soot formation in ethylene/air diffusion flames

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EditorSearch for: Barron, R.M.
TypeArticle
Proceedings titleThe Tenth Annual Conference of the CFD Society of Canada: CFD 2002 : proceedings, June 9-11, Windsor, Ontario
ConferenceThe 10th Annual Conference of the CFD Society of Canada: Windsor, On, June 9-11, 2002
Pages180185; # of pages: 6
AbstractA numerical investigation of the thermal diffusion influence on soot formation in coflow ethylene/air laminar diffusion flames has been conducted. Detailed reaction mechanism and complex thermal and transport properties were employed. The fully elliptic governing equations were solved. Radiation heat transfer from the flames was obtained by the discrete ordinate method coupled to a SNBCK-based wide band model. A simplified two-equation soot model was used. The thermal diffusion velocities were calculated according to the thermal diffusion coefficients that were evaluated based on multicomponent properties. The results show that thermal diffusion does affect soot formation in ethylene/air diffusion flames. Soot volume fraction is overpredicted if thermal diffusion is neglected. The influence of thermal diffusion is enhanced if there are lighter species, such as helium, in the fuel or the air streams. For instance, the peak integrated soot volume fraction doubles if thermal diffusion is not taken into account in the simulation for the flame with helium addition to the air stream.
Publication date
PublisherCanada: s.n.
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Peer reviewedNo
NRC number51467
NPARC number12338495
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Record identifierb4936ee1-b011-4ef4-9230-bb8280e4eb71
Record created2009-09-10
Record modified2016-05-09
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