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非均匀热气体由于内部温度、密度、组分浓度随空间分布不同,其红外辐射特性的计算十分困难。为了描述非均匀热气体的红外辐射特性,从统计学的角度上提出等效分子黑体的假设,运用概率论模型推导出一种计算热气体红外辐射特性的新方法,并将该方法应用于非均匀热气体的红外辐射特性计算。该方法完全等同于布格尔—朗伯特衰减定律,并给予该定律一种直观的物理意义,仿真结果也验证了该方法的正确性。
Due to the different spatial distribution of internal temperature, density and component concentration, it is very difficult to calculate the infrared radiation characteristics of non-uniform hot gas. In order to describe the infrared radiation characteristics of heterogeneous hot gas, a hypothesis of equivalent molecular blackbody is put forward from a statistical point of view. A new method to calculate the infrared radiation characteristics of hot gas is deduced by using the probability theory model. The method is applied to non- Calculation of Infrared Radiation Characteristics of Even Hot Gas. The method is completely equivalent to the Bouguer-Lambert attenuation law, and gives the law an intuitive physical meaning. The simulation results also verify the correctness of the method.