A Study on Radiation from a Luminous Flame

抄録

From such a standpoint that a radiation from a luminous flame is due to the small solid particles (so-called"soot"), a fundamental research for the radiation from the luminous flames of the propane-air and city gas-air was carried out on the basis of Mie theory concerning radiation. The purpose of this paper is to measure the scattered parts and attenuated parts of incident lights about a flame and study the radiation of a luminous flame systematically. A mean diameter D₃₂ of soot particles, defined as [numerical formula], where N (D) dD is the probability that the soot diameter is in the range of D and D+dD, is suggested to discuss the relation between the scattered light from the flame and the attenuated light by the luminous flame. It is showed that the values of D₃₂ obtained by scattering and attenuation are 1 400A regardless of diffusion or premixed flame. The density of the soot particles, C_v, is experimentally obtained from the attenuation of the incident light in our research, and general consideration of radiation from luminous flames is given.