基于CFD网格的激波流场热辐射计算方法

Calculation Method of Shockwave Field Thermal Radiation Based on CFD

针对高速飞行器在气动热环境下的激波热辐射问题,提出一种基于计算流体网格的激波流场热辐射计算方法。首先利用CFD模拟流场数据,结合分子光谱辐射数据库,采用窄谱带模型计算每一个网格的气体吸收系数,然后通过求解网格化的辐射传递方程得到整个激波流场的热辐射情况。根据对激波流场数据的仿真分析,得到了激波流场热辐射随飞行高度和飞行速度的变化规律。

For the aircraft flying in the atmosphere with high speed, it will cause shockwave thermal radiation effects. This paper proposes a flow field thermal radiation calculation method based on computa- tional fluid grid. First with data of CFD and the molecular spectral radiation database, the gas absorption coefficient of each grid is calculated by using a narrow-band model, then the radiative transfer function is solved to calculate the flow field thermal radiation. The results show that the thermal radiation varies with altitude and flight speed changes.