尾焰红外辐射的计算是飞行器红外辐射计算的重要环节。在尾焰流场工程计算模型的基础上, 从燃烧的化学反应出发, 解决了尾喷口处气体组分参数的计算问题, 利用基于Malkmus窄谱带模型的C-G近似法得到了尾焰红外辐射的快速计算方法。仿真结果表明, 该方法能够快速准确地计算出尾焰的辐射, 能为红外制导导弹仿真中飞机目标红外辐射的计算提供有效途径。

The calculation of exhaust plume’s infrared radiation is an important part of the calculation of infrared radiation of an air vehicle. On the basis of an engineering calculation model of flow field in exhaust plume, the calculation of gas component parameters of a nozzle is implemented in terms of the chemical reaction of combustion. A fast calculation method of exhaust plume’s infrared radiation is obtained by utilizing the C-G approximation method based on a Malkmus narrow-band model. The simulation result shows that the method can calculate the infrared radiation in exhaust plume fast and accurately. It can provide an effective approach for the calculation of infrared radiation of an aircraft in the simulation of an infrared guided missile.