Prediction of radiation from plumes, considering spatial temperature variations

Predictions are carried out for radiation heat flux incident on a base surf ace from a gaseous conical plume with radial and axial temperature variatio ns. A forward Monte Carlo method is developed and validated by comparing th e results of an isothermal cylindrical plume, a conical plume with axial te mperature variations, and a cylindrical gas-filled space. The minimum numbe r of random emission sites in the plume required to obtain reasonable estim ates of heat flux is determined The radial temperature variations in the pl ume are shown to result in significant reduction in heat flux. The method a ssumes the plume to be gray and therefore the spectral dependence of plume properties is not considered.