高超声速化学平衡流辐射流场数值解

NUMERICAL SOLUTION OF HYPERSONIC EQUILIBRIUM FLOW WITH RADIATION

本文用数值方法研究了高超声速大钝头体绕流辐射流场。采用粘性激波层控制方程和平衡化学反应气体模型。辐射部价包括连续辐射和线辐射。采用切平板辐射输运模型解决了空间推进的问题。计算结果表明：辐射传热与飞行器再入飞行速度、高度及头部半径密切相关。在计算的条件下，当再入速度小于７．６公里／秒时，辐射传热的影响可以忽略，当再入速度为１１公里／秒左右时，辐射传热可以与对流传热相比拟。当再入速度更大时，辐射传热远大于对流传热。

The radiative viscous flow over hypersonic blunt bodies is calculated numerically.Chemical equilibrium is considered with the viscous shock layer equations.Both line and continuum radiation moldels are employed. One-dimersional plannar medium assumption is used to deal with radiative transport so that the spatial marching technique is available in numerical calculation. The numerical results show that the convective heating transfer rate prevails as the reentry velocity is lower than 7.6km/sec.The radiative heating transfer rate increases with the increase of reentry velocity,density and the nose radius of the body,and it may be as large as the convective heating at the velocity of 11km/sec.