Abstract
Subsequent to the 1st report of the theoretical study on the radiant heat transfer from the soot particle cloud and the experimental study on the luminous flame produced by inserting activated charcoal into the non-luminous flame of town gas, in this report the experimental study on the radiant heat transfer from the luminous flame in the case of spray combustion of A-heavy oil and light oil is described. Soot formation and its concentration in luminous flame, the relation between the effective emission thickness and the emissivity of the soot particle cloud and the influences of the differences of diameter and optical characteristic of soot particle on emissivity are discussed. And it is made clear that the emissivity of luminous flame may take various values according to fuel, spray mechanism, etc., namely according to not only soot concentration but also particle diameter and optical characteristic.
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