Abstract: An approach to the thermal radiat ion of absor bing-emitting media, or w eak absor bing media, e. g . burnedg as, in t he finite element analysis ( FEA) of heat transfer is studied in this paper. By means of making a study of ther adiant energ y ex change equat ions of an enclosure w ith and without absorbing-emitting media, a rule of substitutingboundary elements in FEA for the absor bing-emitting media is proposed. The method used in calculating the configuration factor of r adiation between surfaces in occurr ence of absorbing-emitting media in the radiation is representedand corresponding program was developed. Finally, the temperature distribution of t he tail cover of an air craft w ascalculated and analyzed.

Key words: finite element analysis (FEA), heat transfer analysis, radiation of burned gas, aircraft structure