STATISTICAL MODELING OF THERMAL-RADIATION TRANSFER IN NATURAL-CONVECTION TURBULENT DIFFUSION FLAMES. 1. MODEL CONSTRUCTIONA. Yu. Snegirev UDC 536.46:614.841.41 Methods of calculation of radiation transfer, which are used in modeling turbulent diffusion flames, are analyzed. Realization of the statistical method (Monte Carlo method) in combination with the equations of turbulent flow and combustion of a multicomponent mixture which is formed in combustion of hydrocarbons in air is presented. A method of calculation of the effective coefficient of absorption for a mixture of absorbing gases and soot is described. The effect of turbulent temperature fluctuations on the emission of thermal radiation is taken into account. Academy of Civil Aviation, St. Petersburg, Russia; email: email@example.com. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 76, No. 2, pp. 48-56, March-April, 2003. Original article submitted October 2, 2002.