고체연료 확산화염의 거동에 대한 열복사의 영향Effects of Thermal Radiation on the Behavior of a Diffusion Flame over a Combustible Solid

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Effects of radiative heat transfer on the behavior of a laminar diffusion flame over a solid combustible are explored. The theoretical model includes the two-dimensional Navier-Stokes momentum, energy and species equations with a single-step overall chemical reaction and second-order, finite-rate Arrhenius kinetics. A solution strategy, called the discrete ordinates method, is employed to calculate the radiation source term. Numerical studies are performed over a wide range of mass absorption coefficients characterizing the radiation absorption and emission of fuel vapor gas. When the radiation absorption is significant, radiative heat loss retreats flame downstream over the fuel surface causing the shrinkage of size and diminution of maximum temperature. It is inferred that thermal radiation may be the controlling mechanism of diffusion flame stabilization and thus neglecting radiation can cause errorneous prediction on the flame behavior and structure in combustion reaction processes. Results on the effects of wall emissivity are also presented.
Publisher
한국항공우주학회
Issue Date
1993-02
Language
Korean
Citation

한국항공우주학회지, v.21, no.1, pp.62 - 73

ISSN
1225-1348
URI
http://hdl.handle.net/10203/14893
Appears in Collection
AE-Journal Papers(저널논문)
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