高速导弹光学窗口外存在激波层，为高度不均匀的梯度温度气体介质, 针对其中的热辐射传递开展一种有效数值求解方法研究.基于离散传递法的思想，利用光线传输模型寻找导引头探测口径内的视线路径，推衍出激波层的热辐射强度计算模型，并研究此模型所得激波层热辐射噪声与来流参数之间的关系，给出经验公式.结果表明, 对于3~8 μm红外波段，激波层热辐射噪声在大气层内受飞行高度影响很小，与马赫数关系密切.

The shock layer of high-speed missiles is composed of gas medium with highly uneven temperature distribution. A model for the radiative heat transfer in this layer was developed. With the method of discrete transfer and the model of light transmission, the heat radiation strength of the shock layer was calculated by the line of sight along the seeker detectors. The relations between the shock wave thermal radiation noise and flow parameters were also analyzed and the empirical formula is given. The results showed that for 3~8 μm infrared band, the thermal radiation noise and the Mach number is closely related. The radiation alters very little with the change of flight height (in atmosphere).