导弹壁温的准三维计算及红外辐射研究

Quasi-three Dimensional Calculation of Missile Wall Temperature and Infrared Radiation of the Missile

建立了飞行中段导弹壁面的非稳态、准三维温度计算模型,并采用控制容积积分法求解得到不同时刻壁面温度的三维分布,研究了导弹表面辐射特性的计算方法.模型中考虑了气动加热、太阳和大气辐射、壁面内部导热系数变化对导弹壁面温度的影响,太阳和大气辐射对导弹表面辐射的影响.计算了某飞行中段导弹的壁温及光谱8～12 μm内导弹红外辐射的空间分布并给出了相应的结果.

A unsteady, quasi-three dimensional model is established to simulate the temperature distribution on wall of missile in midcourse flight, and the control volume integration method is used to solve the differential equations. The computation of radiative characteristics of missle cover is also discussed. The influences of areodynamic heating, radiation from sun and atomosphere, variation of thermal conductivity coefficient on wall temperature, and the influences of radiation from sun and atmophere on radiative characeristics of missle cover were taken into consideration in the model. As the sample, the temperaturedistribution on the wall and the infrared radiation intensity in spectrum 8-12μm from the cover of one missile in midcourse flight were computed and presented.