### 马赫数6柱-裙激波/边界层干扰直接模拟

1. 空气动力学国家重点实验室, 绵阳 621000
• 收稿日期:2020-08-31 修回日期:2020-09-25 发布日期:2020-10-30
• 通讯作者: 郭启龙 E-mail:guoqilong@cardc.cn
• 基金资助:
国家重点研发计划（2019YFA0405300）；国家自然科学基金（11802324）；国家数值风洞工程

### Direct numerical simulation of shock wave/turbulent boundary layer interaction in hollow cylinder-flare configuration at Mach number 6

SUN Dong, LIU Pengxin, SHEN Pengfei, TONG Fulin, GUO Qilong

1. State Key Laboratory of Aerodynamics, Mianyang 621000, China
• Received:2020-08-31 Revised:2020-09-25 Published:2020-10-30
• Supported by:
National Key Research and Development Program of China (2019YFA0405300); National Natural Science Foundation of China (11802324); National Numerical Windtunnel Project

Abstract: The compressibility effect in the hypersonic shock wave/boundary layer interaction is much stronger than that in the supersonic interaction, and after the reattachment, the high local pressure and thermal load will form, thereby significantly influencing the flight safety of vehicles. The three-dimensionality of the shock wave/boundary layer interaction further complicates the flow structures, making them more difficult to predict. In this study, a direct numerical simulation on the hypersonic shock wave/boundary layer interaction is performed. The effects of G rtler vortices on the separation bubble, the wall pressure and the heat flux are investigated both qualitatively and quantitatively. The investigation results indicate that the separation bubble exhibits obvious three-dimensionality and the size of the bubble at the spanwise separation location is significantly smaller than that at the spanwise reattachment location. The bubbles at the two locations change synchronously. The pressure and the heat flux exhibit inhomogeneous distribution in the spanwise direction. The mean pressure and the heat flux at the spanwise reattachment location are 13% and 16.2% higher than those at the spanwise separation locations, respectively. The ratios for the fluctuations of pressure and heat flux are 28% and 20% higher, respectively. The proper orthogonal decomposition analyses indicate that the energy concentrates on the shear layer above the bubble and the low-order modes at the spanwise reattachment occupy more energy than those at the separation location.