Heat transfer in a radiating medium between flame and fuel surface

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(89)90093-X· OSTI ID:6083091

Baek, S W; Lee, C

The feedback of heat by simultaneous conduction, convection, and radiation in a thermally radiating medium is parametrically investigated. The flame and fuel surface are assumed to be diffuse, nonblack, infinite, isothermal, parallel surfaces separated by a finite distance. The space between these planes is assumed to be filled with a radiatively absorbing, emitting, and scattering medium. The problem is formulated exactly as a set of simultaneous integrodifferential equations. The numerical results reveal that a radiating medium of high optical thickness has a blocking effect on the total heat transfer. The temperature profile is observed to be convex upward for a radiating medium with high optical thickness, either as the albedo decreases or as the surface emissivity increases. However, the total heat-flux variation is not sensitive to either the albedo or the surface emissivity for a medium with a low optical thickness.

• Research Organization: Mechanical Engineering Dept., Aerospace Div., Korea Advanced Institute of Science and Technology, Seoul (KR)
• OSTI ID: 6083091
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 75:2; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CONVECTION
COOLING
ENERGY TRANSFER
FLAMES
FUELS
HEAT TRANSFER
ISOTHERMAL PROCESSES
MASS TRANSFER
NUMERICAL SOLUTION
PARAMETRIC ANALYSIS
RADIATIVE COOLING
SCATTERING
SURFACE PROPERTIES