导弹蒙皮红外辐射特性的数值计算与分析

采用逆向蒙特卡罗(RMC)计算方法,在给定的飞行状态下分别计算出亚声速与超声速导弹蒙皮辐射源在不同方位角的2～μm、8～14 μm波段红外光谱辐射强度及强度场分布.结果表明:对亚声速导弹,相对于8～14 μm,其2～μm的辐射可忽略不计;对超声速导弹,相对于2～μm,其8～14 μm的辐射只有0%左右,但其绝对值较大而不可忽略不计.导弹的红外辐射在0°～90°探测位置内增加,在90°～180°内减小.大气对低空亚声速导弹辐射衰减作用强,对高空超声速导弹辐射衰减作用弱.超声速导弹的最大辐射强度是亚声速的18倍. 

Numerical computation and analysis of the infrared radiation characteristic of missile scarfskin

The reverse Monte Carlo method was used in the computer program.And the ideal of program design and the way of realization were introduced particularly.Computer processes and formulas were provided.At a given flight condition,the infrared radiation characteristics of missile scarfskin were obtained by calculation.Brief comparison and analysis of the computing results were conducted.For subsonic missile,the radiation at 2～5 μm can be ignored relative to the radiation at 8～14 μm.For supersonic missile,the radiation at 2～5 μm is a half of the radiation at 8～14 μm.The radiation increases at the detected position of 0°～90° degree and decreases at the detected position of 90°～180° degree.The atmosphere attenuation effect on subsonic missile is strong at low altitude and is weak on supersonic missile at high altitude.The max radiation of supersonic missile scarfskin is 18 times as that of ultrasonic missile scarfskin.