研究了作为点源目标的战斗机红外辐射特性。将飞机的红外辐射分为排气系统辐射和蒙皮辐射两部分, 根据红外辐射相关理论, 提出了各自的红外辐射计算方法。在排气系统辐射的计算中, 将实测数据、流场计算结果与经验公式相结合, 并考虑了尾焰对尾喷口辐射的吸收以及多条尾焰的相互作用。通过计算不同状态、不同波段的战斗机红外辐射, 得到了目标辐射随方向、速度、高度、发动机状态的变化规律, 并验证了所建计算模型的正确性。

The infrared radiation of fighter-plane as point source target was studied in this paper. The fighter-plane’s IR radiation can be divided into two parts: engine exhaust system radiation and skin radiation. Based on the IR radiation theory, the calculation methods of those two parts were proposed. For the calculation of engine exhaust system radiation, measured data, results of flow field calculation, and empirical formula were combined. Besides the plume’s absorbing effect to nozzle radiation and multiple plume’s interaction were considered. By calculating the fighter-plane’s IR radiation under different conditions and different wave bands, the target radiation’s variations with orientation, velocity, altitude, and engine condition were obtained, and the correctness of the calculation method was also validated.