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A model of large heat transfer surface combustion with radiant heat emission

✍ Scribed by A.C. McIntosh; A. Prothero

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
850 KB
Volume
83
Category
Article
ISSN
0010-2180

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✦ Synopsis

A model is formulated for the "surface" combustion of a premixed gas mixture near the downstream surface of a porous solid. Large heat transfer occurs between the gas and porous solid, and there is significant radiant heat emission from the heated surface of the solid. Using large-activation-energy asymptotic methods an analytical solution is derived for the gas and solid temperature profiles within this burner. The influence of the key parameters --the convective heat exchange coefficient, the ratio of gas to solid conductivities, and the radiation coefficient--is evaluated. The present model predicts operational features of practical surface combustion burners such as radiant efficiency, flame lift-off limits, and thermal range of surface combustion operation. A prediction of the flashback limit can also be made using this theory.

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