Investigation of droplet combustion with nongray gas radiation effects

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Single droplet combustion processes including heating, evaporation, burning, soot formation and name radiation were theoretically investigated by adopting nongray gas radiation model for the radiative transfer equation (RTE). n-Heptane was chosen as a fuel in the numerical calculation and the results were compared with the experimental data available in the literature. The discrete ordinate method (DOM) was employed to solve the radiative transfer equation and the weighted sum of gray gases model (WSGGM) was applied to account for nongray gas radiation effect by CO2 and H2O while foot was assumed gay. Therefore, very detailed effects by nongray gases could be figured out in the results. The results have shown that the total burning time increases due to a decrease in total heat flux with the nongrey gas model. It is also found that for the nongray case the radiative loss to external environment is higher, thereby reducing the maximum gas temperature and the flame thickness. Consequently, a better agreement with experimental data could be obtained by using nongray gas model.
Publisher
GORDON BREACH SCI PUBL LTD
Issue Date
1999
Language
English
Article Type
Article
Keywords

THERMAL-RADIATION; TRANSIENT COMBUSTION; HYDROCARBON FUELS; FLAMES

Citation

COMBUSTION SCIENCE AND TECHNOLOGY, v.142, no.1-6, pp.55 - 79

ISSN
0010-2202
URI
http://hdl.handle.net/10203/7041
Appears in Collection
AE-Journal Papers(저널논문)
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