Modeling soot formation in turbulent methane–air jet diffusion flames

The modeling of soot formation and oxidation by the conditional moment closure (CMC) method is considered. It is particularly focused on the influence of differential diffusion of the soot particles on soot predictions. Most importantly, no changes are made to the soot models that were derived from...

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Bibliographic Details
Published in:Combustion and flame 2000-04, Vol.121 (1), p.24-40
Main Authors: Kronenburg, A, Bilger, R.W, Kent, J.H
Format: Article
Language:English
Subjects:
Applied sciences
Combustion of gaseous fuels
Combustion. Flame
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies. Data and constants. Metering
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Summary:The modeling of soot formation and oxidation by the conditional moment closure (CMC) method is considered. It is particularly focused on the influence of differential diffusion of the soot particles on soot predictions. Most importantly, no changes are made to the soot models that were derived from laminar flame experiments and calculations. Good to excellent predictions are achieved in lightly sooting turbulent methane–air jet diffusion flames at atmospheric and elevated pressure when differential diffusion is taken into account. Unity Lewis number assumptions yield underpredictions of soot volume fractions by about 40%. Soot oxidation by OH and O 2 can be treated accurately and both oxidation mechanisms are found to be important for soot burnout in downstream regions. © 2000 by The Combustion Institute
ISSN:0010-2180
1556-2921
DOI:10.1016/S0010-2180(99)00146-7