建立飞机几何模型进行非结构化网格处理, 基于 Fluent软件对飞机在外流场作用下的气动热进行了数值模拟计算, 综合考虑尾喷管、尾焰辐射对飞机机身温度的影响, 获得飞机表面的温度分布数据, 然后基于反向蒙特卡洛法建立飞机机身红外辐射特性计算模型, 利用辐射传输方程计算尾焰红外辐照度, 通过灰度转换获得飞机的红外图像。

An aircraft geometric model is established for unstructured grid processing, and numerical simulation of the aerodynamic heat in the external flow field is carried out using the Fluent software. Considering the influence of nozzle and plume radiation on the aircraft temperature, the temperature distribution data of aircraft surface is obtained. The model for calculating infrared radiation of aircraft fuselage is established based on the reverse Monte Carlo method, the infrared irradiance of plume is calculated based on the radiative transfer equation, and the infrared image of the airplane is obtained using the method of gray level transformation.