末敏子弹非稳态红外辐射特性数值仿真分析  

Numerical analysis on the unsteady infrared radiation characteristics of terminal-sensitive submuniton

作　　者：刘连伟[1,2] 杨淼淼[1,2] 许振领[1,2] 樊宏杰[1,2] 王敏[1,2] 

机构地区：[1]电子信息系统复杂电磁环境效应国家重点实验室 [2]中国人民解放军63892部队

出　　处：《红外与激光工程》2013年第4期857-862,共6页Infrared and Laser Engineering

基　　金：国防预研项目

摘　　要：为计算末敏子弹在弹道诸点的瞬态红外辐射,根据末敏子弹外壁气动加热、辐射换热和内部导热耦合作用机理,利用流体仿真软件Fluent对完整弹道下末敏子弹的非稳态温度分布进行数值计算。在此基础上,计算分析了子弹弹体和降落伞在3~5μm和8~12μm波段的红外辐射特性及在弹道中的变化规律,并与对应探测视线方向的天空背景红外辐射特性进行对比。计算结果表明:降落伞辐射亮度有时为子弹弹体辐射亮度的一半,但辐射强度可达到子弹弹体辐射强度的21倍,在长波红外波段、弹道减速减旋阶段实现对末敏子弹的告警具有较强的可行性。To calculate the transient infrared radiation released from the terminal-sensitive submuniton,a numerical simulation of the unsteady temperature distribution for the terminal-sensitive submuniton performed by using the software Fluent, which taking into account three factors as follows, aerodynamic heating, irradiative heat transfer and structure heat conduction. Then, the infrared radiation characteristics of both submuniton body and parachute were obtained by calculation at 3-5 p^m and 8-12 p.m waveband, the changes of infrared radiation for the whole trajectory were also analyzed. Also, this paper calculated the infrared radiation of atmosphere in the gazing direction, which was compared with the infrared radiation of terminal-sensitive submuniton. The results show that the infrared radiance of parachute is a half of the infrared radiance of submuniton body at least, but the infrared radiation intensity of parachute is 21 times of the infrared radiation intensity of submuniton body at most, and it was preferable to take warning of terminal-sensitive submuniton at LWIR and the deceleration and dispinning stage of the trajectory.

关 键 词：红外辐射 末敏子弹 非稳态 红外告警 

分 类 号：TN219[电子电信—物理电子学]