Radiant Heat Transfer from Luminous Flame : 1st Report, Theoretical and Experimental Studies on the Uniform-Temperature and Particle Contents

Abstract

In this paper, the radiant heat transfer from luminous flame is treated theoretically and experimentally, from the view point that the radiation from the cloud of carbon particles is most effective. But, the combustion reaction that may determine the distribution of carbon particles is not considered. Then, in the case where only the cloud of luminous carbon particles under uniform temperature and uniform particle contents is concerned with radiation, the relation between the total emissivity and x has been found, where x is the function of particle contents, thickness and temperature of flame. And the calculated value agrees with Schack's result. Next, in the luminous flame, the relation between the total emissivity and x, ε_q has been found, where ε_q is the total emissivity of non-luminous gases. Moreover, the relation between the emissivity of luminous flame and the quantity of carbon particles in the luminous flame which was formed artificially by inserting the small carbon particles in a non-luminous flame, has been made clear by means of optical pyrometer and radiation pyrometer. As a result of studies, the experimental value has consisted with above mentioned theoretical analysis.