高超声速再入体烧蚀流场计算分析

从化学非平衡NS方程或其简化形式(粘性激波层方程、PNS方程)出发,求解高超声速再入体的绕流和底部尾流流场。首先讨论了碳基材料烧蚀壁面条件的确定方法,计算了包含和不包含碳-碳烧蚀产物的再入体半球的化学反应绕流流场,并和文献结果进行了对比。在此基础上,计算了两个高度条件下,包含和不包含碳-酚醛烧蚀产物的再入小钝锥的绕流和尾流流场,分析了烧蚀产物对流场电子数密度、温度等流动参数的影响。

The computation and analysis for the hypersonic flow over reentry vehicles with ablation

In this paper,the flows over hypersonic vehicles and their wake flows are simulated numerically based on the Navier-Stocks equations with chemical source terms or the simplified form of them(VSL equations and PNS equations).At first,the method to define the boundary condition at carbonic material wall of reentry vehicles is discussed.The chemical reaction flow over a semi sphere with and without carbon-carbon ablation products is computed and the numerical results are compared with ones in a reference paper.On the basis of this,the flows over a small sphere-cone with and without ablation products of carbon-phenolic material are computed at two reentry altitudes and the effects of ablation products on the flow parameters such as electron number density and temperature are analysed.