Numerical study of shock wave and bypass transitional boundary layer interaction in a supersonic compression ramp

被引：0
|
作者：
Tong F. [1 ]
Tang Z. [1 ]
Li X. [2 ]
Wu X. [1 ]
Zhu X. [2 ]
机构：
[1] Computational Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang
[2] State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing
来源：
Tang, Zhigong (515363491@qq.com) | 1600年 / Chinese Society of Astronautics卷 / 37期
基金：
中国国家自然科学基金;
关键词：
Bypass transition; Compression ramp; Direct numerical simulation; Fluctuation pressure; Shock wave and boundary layer interaction; Skin friction;
D O I：
10.7527/S1000-6893.2016.0096
中图分类号：
学科分类号：
摘要：
A direct numerical simulation (DNS) of shock wave and bypass transitional boundary layer interaction for a 24° compression ramp at Mach number Ma∞=2.9 is conducted. The intricate flow phenomena in the ramp-corner, including separation bubble characteristics and shock wave behavior, have been studied systematically. The DNS results of transitional interaction are compared with the corresponding turbulent interaction and the reasons for the differences are analyzed. The evolution of the transitional boundary layer in the ramp is researched. The fluctuation of wall pressure and distribution of skin friction coefficient in transitional interaction are investigated in detail. Results indicate that the distribution of coherent vortex structures is non-uniform in the spanwise direction and the separation bubble is reduced to a V-shape by the mutual interactions of the hairpin vortices chains. The shock fronts are destroyed badly and even break down by the interaction. The multiple layer of shock foots is observed obviously. The interactions rapidly accelerate the evolution of transition and greatly amplify the intensity of fluctuations. The peak of wall pressure fluctuations appears with single-peak structure at the downstream of separation region. And the overshoot of skin friction induced by transitional interaction is explained by the strong Reynolds shear stress and high turbulent kinetic energy. © 2016, Press of Chinese Journal of Aeronautics. All right reserved.
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页码：3588 / 3604
页数：16
相关论文
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