针对高速飞行器典型红外窗口材料及气动加热外部热环境特点,建立红外窗口辐射导热耦合换热模型,采用光线跟踪法及有限差分法研究了红外窗口内部温度分布。考察了材料的物性、热边界条件等因素对温度分布的影响。研究结果表明,壁面对流换热系数、光谱吸收系数对红外窗口内部温度分布影响很大。 According to the typical infrared window material of high-speed aircraft and the characteristics of the external thermal environment of aerodynamic heating, a radiative heat transfer coupled heat transfer model was established. The temperature distribution in the infrared window was studied by ray tracing method and finite difference method. The physical properties of the material, thermal boundary conditions and other factors on the temperature distribution. The results show that the convective heat transfer coefficient and the spectral absorption coefficient have a great influence on the temperature distribution in the infrared window.