高温含粒子自由流红外辐射特性的反向蒙特卡罗法模拟

SIMULATION OF INFRARED RADIATION CHARACTERISTICS OF HIGH TEMPERATURE FREE-STREAM FLOW INCLUDING PARTICLES BY USING BACKWARD MONTE-CARLO METHOD

高温含粒子自由流红外辐射特性的研究在目标探测、燃烧诊断、火焰温度测量等领域有着重要应用.利用反向蒙特卡罗法模拟计算高温含粒子自由流的红外辐射特性,考察了自由流中粒子散射和边界条件对定向辐射热流的影响,并与正向蒙特卡罗法进行比较,比较结果表明反向蒙特卡罗法在计算效率上明显优越.

The research of infrared radiation characteristics of high temperature free-stream flow with particles is very important for the field of target detection, combustion diagnosis and temperature measurement of flame. In this study the infrared radiation characteristics of high temperature free-stream flow were calculated with backward Monte-Carlo method. The effect of the particle scattering and different boundary conditions on the directional radiation heat flux was examined. The calculation results were compared with forward Monte-Carlo method. The-result shows the superiority in computational efficiency of backward Monte-Carlo method.