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A simple model for carbon monoxide in laminar and turbulent hydrocarbon diffusion flames

✍ Scribed by R.W. Bilger; S.H. Stårner

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
1012 KB
Volume
51
Category
Article
ISSN
0010-2180

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✦ Synopsis

A model has been developed for the composition in diffusion flames. It consists of a flame sheet for the pyrolysis or consumption of fuel on the rich side of sloichiometric. Near stoichiometric the molecular and radical species are assumed to be in partial equilibrium and the burnout of CO is controlled by the rate of recombination of the radicals in three-body reactions. The composition and reaction rates for the excess moles are expressible in terms of two variables, the mixture fraction and the excess moles. Calculations for these two variables have been carried out in laminar and turbulent jet diffusion flames and the predicted composition compared with experimental data. In broad terms the agreement is good and the prediction of CO on the lean and rich sides of both laminar and turbulent flames is particularly encouraging. Application of the model to the prediction of CO emissions in combustors is discussed.

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