基于蒙特卡洛法，对水雾遮蔽热辐射衰减建立了光子状态序列的追踪模型.利用该模型对水雾粒子的多重散射进行模拟，分析了影响水雾消光性能的消光系数、水雾浓度、不对称因子等参数，发现不对称因子也是影响水雾隐身性能的重要参数.研究表明：对于消光系数相同的介质，不对称因子越小越有利于衰减目标热辐射强度，而采用朗伯比尔定律则不能获得此结论；在雾粒子半径远大于红外波长的情况下，提高水雾的浓度并减小粒子半径可有效提高水雾的衰减作用.

A photon tracking model for heat radiation attenuation with water fogs was established based on the Monte-Carlo Method. The parameters of the water fogs such as extinction coefficient, concentration and the asymmetry parameter were analyzed, all of which had impact on the extinction character, and it was found that the asymmetry parameter was also an important one. The research indicates that for the medium with the same extinction coefficient, the lower the value of the asymmetry parameter is, the more exquisitely the water fogs can build down the heat radiation, however one can′t get the conclusion based on the Lambert-Beer′s law; when the radiuses of the water fogs are much bigger than the infrared wavelength, the attenuation effect can be enhanced by increasing the mass concentration of the water fogs and decreasing the radiuses of the particles.