Nonequilibrium Aerodynamics for a Super-orbital Reentry

1. 采用粘滞激波层（VSL）方法，对超轨道轨道再入飞行器的热化学非平衡激波层进行了数值研究。根据计算得到的流动特性，估计了车壁上的热流密度。此外，还计算了辐射热流密度。结果表明，在紫外区和真空紫外区，主要光谱为N、O和N+的谱线。烧蚀冷却VSL分析扩展到烧蚀冷却的非平衡激波层。研究了烧蚀冷却有效运行时的车壁温度。烧蚀引起的光谱为C天鹅带。由超轨道再入引起的强激波结构：由活塞驱动激波管产生的强激波，并使用本研究的一名研究人员开发的一维成像光谱方法测量了其背后的电子密度。结果表明，电离速率比常规模型预测的电离速率要快。

1. Investiation of a noneguilibrium shock layer around a super-orbital reentry capsuleUsing the VSL (Viscous Shock Layer) method, a thermochemical nonequilibrium shock layer around a super-orbital orbital reentry space vehicle was numerically investigated. Heat flux on the vehicle wall was estimated from the computed flow properties. In addition, radiative heat flux was also calculated. It was revealed that the dominant spectra were the line spactra of N, O and N+ in the ultra-violet and vacuum ultra-violet region.2. Ablation coolingThe VSL analysis was extended to a nonequilibrium shock layer with ablation cooling. The vehicle wall temperature for which the ablation cooling warks efficiently was investigated. The spectrum caused by the ablation was C swan band.3. Structure of a very strong shock wave caused by a super-orbital reentryA very strong shock wave was generated by a piston^driven shock tube and electron density was measured behind it using a one-dimensional imaging spectroscopic method developed by one of the invesigators of this research. The results showed that ionization rate was faster than that predicted by the conventional model.