衝撃風洞の加熱増加現象における化学非平衡性の影響

抄録

Recently, shock-tunnel experiments have been conducted at high-pressure and high-enthalpy conditions such as a reservoir pressure of 50MPa and a reservoir enthalpy of 20MJ/kg in order to study laminar-to-turbulence transition on hypersonic vehicles. In those experiments, unexpected large wall heat flux to test models was measured, which was not observed at conventional pressure conditions. The cause of the heating augmentation remains an open issue. In this study, the influence of chemical nonequilibrium in the flowfield around test models on the heating augmentation was investigated by computational fluid dynamics (CFD) simulation, and it was found that the influence is small.