中段弹道目标的温度场与红外辐射特性计算  

Calculation of Temperature Field and Infrared Radiation Characteristics of Midcourse Ballistic Target

作　　者：申文涛[1] 朱定强[1] 蔡国飙[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《宇航学报》2010年第9期2210-2217,共8页Journal of Astronautics

摘　　要：红外辐射特性是预警系统探测识别弹道中段目标的重要特征之一。通过计算飞行时目标与太阳、地球的相对位置,确定目标的受外辐射照射状态。利用有限容积法计算锥形目标的三维温度场,采用双向反射分布函数(BRDF)计算目标表面对太阳、地球辐射的反射特性,并结合自身红外辐射,得到了不同类型中段目标红外辐射特性变化情况和空间分布情况。最后,分析了外部辐射环境和目标材料特性对目标红外辐射特性的影响,为中段预警探测提供了参考。The infrared radiation of midcourse ballistic targets is an important property for the early warning system to detect and identify.The relative position between the Sun,the earth and the target are calculated to get the objectives of the affected by external radiation.A finite volume method is used to calculated the three-dimensional temperature field of coneshaped targets,bi-directional reflectance distribution function（BRDF） to get the reflective properties from the radiation of the Sun and the Earth,and the changes and spatial distribution of optical properties of different types of midcourse targets are calculated in combination with their own infrared radiation.And last,effect of the external radiation environment and the material properties of objectives on infrared radiation characteristics of the target have been analyzed.

关 键 词：弹道中段目标 温度场 红外辐射特性 双向反射分布函数 

分 类 号：V411.8[航空宇航科学与技术—航空宇航推进理论与工程]