随着红外探测与红外制导技术的发展,军用目标的红外隐身及其评估技术的研究具有越来越重要的军事意义。低发射率膜层是军用目标红外隐身的重要手段之一,低发射率膜层的红外隐身效果评估是研制低发射率膜层的基础。综合考虑目标与外部环境间的对流和辐射换热关系,建立了涂有膜层的目标的温度与红外辐射特性的模型,编制了相应的数值计算程序。针对两种低发射率膜层,计算了添加膜层前后目标表面温度和红外辐射随时间的变化规律,以此分析了膜层的红外隐身效果。结果表明,膜层发射率的选择应考虑被膜层控制的波长以及外部环境的综合影响。
With the rapid development of infrared detection and missile-guiding technology, the research on the infrared stealth and its assessment of target shows more military importance. The low emissivity film is one of the infrared stealth methods. The infrared stealth assessment of the low emissivity film is the foundation for its development. The temperature and infrared signature model of the target coated with film was established considering of the convection and radiation heat transfer relationship between the target and outer environment synthetically. The corresponding numerical calculation program was made. The time-dependent surface temperature and infrared signature of the target were calculated before and after using the low emissivity film. On this account,thermal infrared stealth coating effect was analyzed for two kinds of low emissivity film. The take account of integration effect of the wavelength results show that the choice of film emissivity should controlled by the film and the outer environment,