Effects of gravity on soot formation in a coflow laminar methane/air diffusion flame

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DOIResolve DOI: http://doi.org/10.1007/s12217-009-9175-z
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TypeArticle
Journal titleMicrogracity Science and Technology
Volume22
Issue2
Pages205214; # of pages: 10
SubjectSoot formation; Coflow diffusion flame; Microgravity combustion
AbstractSimulations of a laminar coflow methane/air diffusion flame at atmospheric pressure are conducted to gain better understanding of the effects of gravity on soot formation by using detailed gas-phase chemistry, complex thermal and transport properties coupled with a semiempirical two-equation soot model and a nongray radiation model. Soot oxidation by O₂, OH and O was considered. Thermal radiation was calculated using the discrete ordinate method coupled with a statistical narrow-band correlated-K model. The spectral absorption coefficient of soot was obtained by Rayleigh’s theory for small particles. The results show that the peak temperature decreases with the decrease of the gravity level. The peak soot volume fraction in microgravity is about twice of that in normal gravity under the present conditions. The numerical results agree very well with available experimental results. The predicted results also show that gravity affects the location and intensity for soot nucleation and surface growth.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number51998
NPARC number15190025
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Record identifier9d628974-17b6-4ef9-878e-1517ecb3ab28
Record created2010-05-06
Record modified2016-05-09
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