火焰筒内燃气辐射的蒙特卡罗法计算

用概率统计方法计算了航空发动机燃烧室火焰筒内燃气对壁面的辐射热流，计算中考虑了燃气的辐射及吸收特性。该计算程序适用于二维轴对称的环型燃烧室和单管燃烧室辐射热流的计算，并对计算结果进行误差分析。介绍了算例计算结果，为了检验该计算程序的可靠性，对角系数进行了校核计算，其结果是令人满意的。此外，文中还介绍了对某环型燃烧室和一假想单管燃烧室的计算及误差分析结果。

CALCULATION OF GAS RADIATIVE HEAT TRANSFER IN COMBUSTOR WITH MONTE-CARLO METHOD

A numerical model using Monte-carlo meth od for calculation of radiative flux in an annular combustor has been developed. The total energy emitted from gas and wa lls is divided into a number of energy b undles.The absorbing-emitting characteri stics of the gas are considered in the m odel.The transmission process of the bun dle is simulated as a random walk accord ing to its distribution of probability d ensity in the direction and ray length.F ollowing the track of each bundle,the ra diative flux on walls can be determined through the statistics of emission and a bsorption energies.The configuration fac tors between two concentric cylinders we re computed to make an examination of th e program.The numerical results fairly a ccord with the analytic solutions.A proc edure for statistical error analysis is also enclosed in the program.