摘要
飞机在高空高速的条件下飞行时,红外图像的获取通常较为困难。为解决这一问题,将整机辐射分解为机体辐射与排气系统辐射两大部分,以经典红外辐射理论为基础,结合传热学及射流动力学工程模型,建立了一种实时性较好的飞机红外图像生成模型。在求解蒙皮表面温度场时,采用求解热平衡方程法,综合考虑气动加热、内热源加热、环境辐射热量与蒙皮向外辐射热量对蒙皮温度的作用。计算排气系统红外辐射时,采用基于包络面的红外辐射计算方法,将尾焰流场计算的工程模型、包络面模型及非均匀气体计算模型相结合。最后利用VC++平台与Open GL图形库编程生成了飞机的红外图像。仿真图像为成像制导武器的仿真提供了目标源,在成像制导武器系统的评估测试中有一定参考价值。
When the aircraft is flying in high-altitude and high-speed flight,its infrared images are difficult to be ac-qaired.In order to solve this problem,the aircraft radiation is divided into two main parts,aircraft skin’s radiation and exhaust system’s radiation.Based on the classical radiation theory,and combined with the engineering model of heat transfer and jet dynamics,an efficient aircraft infrared simulation model is built up.In the calculation of aircraft skin’ s radiation,the heat balance equations,which take into account aerodynamic heat convection,environmental heat radi-ation,internal heat radiation and the skin’s heat radiation,was established in order to acquire the aircraft skin’s tem-perature distribution.In the calculation of exhaust system’s radiation,the plume flow field calculation model,the fig-ure envelope model and the non-uniform hot gas radiation model are combined.At last,infrared images are pro-grammed by the VC ＋＋platform and the Open Graphics Library.The simubined infrared images can offer target’s infrared radiation images for the simulation of the infrared radiation image guided weapons,which can be helpful to the evaluation of the infrared radiation image guided weapon systems.
出处
《激光与红外》
CAS
CSCD
北大核心
2015年第8期911-917,共7页
Laser & Infrared
基金
国家自然科学基金项目(No.61172083)资助
关键词
红外辐射
红外成像仿真
温度场
蒙皮
排气系统
红外图像
infrared radiation
infrared imaging simulation
temperature distribution
aircraft skin
exhaust system
infrared images
