ISSN Online: 2377-424X
International Heat Transfer Conference 3
THE EFFECT OF TEMPERATURE ON THE EXTINCTION OF RADIATION BY SOOT PARTICLES
Abstract
Reported specific attenuation coefficients of soot in luminous flames vary over a threefold range, to determine the effect of temperature on extinction of radiation by a soot particle, dispersion equations have been fitted to measured values of the refractive and absorption indices of pyrographite and extrapolated with respect to temperature. These extrapolated indices have been used to calculate extinction using the Mie Theory. It is concluded that extinction is an insensitive function of particle temperature and that reported variations in extinction of radiation by soot in flames not accounted for by a difference in particle size must be attributed to a variation in physical structure between soots in different flames.