空中目标蒙皮的红外辐射特性是对空中目标进行探测与识别的重要依据。针对国外某型空中目标, 设置其飞行航迹, 综合考虑环境辐射和气动加热等因素, 建立空中目标蒙皮的一维导热微分方程, 采用后向差分方法求解方程, 算得了空中目标在 4:00～4:45和 12:00～12:45两时间段飞行时蒙皮表面的温度分布。最后综合考虑环境辐射, 分别计算了空中目标蒙皮中远红外的辐射强度随时间与空间变化的分布。结果表明: 空中目标蒙皮在 8～14 μm波段的辐射强度远大于在 3～5 μm波段的辐射强度, 且目标飞行过程中, 其蒙皮红外辐射特性变化不大。

The infrared characteristics of an air target’s scarfskin are very important for the detection and identification of the air target. Referring to a certain oversea air target, its flight path was set. Aerodynamic heating and radiation from environment being considered comprehensively, one dimensional heat conduction equations were established about the air target’s scarfskins. These equations were solved with backward difference approximation, and then temperature distributions of the scarfskins were achieved in 4:00 AM~4:45 AM and 12:00 PM~12:45 PM. Finally, influence of environment radiation being considered, while time and space changing, the infrared radiant intensity distributions of the scarfskins were calculated numerically in 3～5 μm and 8～14 μm. The result shows that far infrared radiant intensity of the scarfskins is far more than their middle infrared radiant intensity and the infrared characteristics have few changes when the air target flights.