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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 development of infrared detection and infrared guidance technology, the military target of infrared stealth and its evaluation technology have more and more important military significance. The low emissivity film is one of the most important means of the military target infrared stealth. The evaluation of the infrared stealth effect of the low emissivity film is the basis of developing the low emissivity film. Considering the convection and radiative heat transfer between the target and the external environment, a model of the temperature and infrared radiation characteristics of the coated target was established and the corresponding numerical calculation program was compiled. For the two kinds of low-emissivity films, the changing rule of target surface temperature and infrared radiation before and after the addition of film was calculated, and the infrared stealth effect of the film was analyzed. The results show that the emissivity of the film should be chosen considering the wavelength controlled by the film and the combined effect of the external environment.