Direct numerical simulation of a supersonic turbulent boundary layer over a compression–decompression corner | |
段俊亦1; 李欣2; 李新亮1; 刘洪伟1 | |
发表期刊 | Physics of Fluids |
2021 | |
卷号 | 33页码:065111 |
摘要 | A direct numerical simulation of the interaction between a shock wave and the supersonic turbulent boundary layer in a compression–decompression corner with a fixed 24 deflection angle at Mach 2.9 is conducted. The characteristics of the shock interactions are investigated for two heights between the compression and decompression corners, corresponding to H=dref ¼ 4:25; 1:22, where dref denotes the reference turbulent boundary layer thickness. A classic shock wave/turbulent boundary layer interaction flow is reproduced in the higher case. For the lower case, the size of the separation region is significantly decreased, and the low-frequency unsteadiness is slightly suppressed in the interaction region, as assessed by analyzing the mean and fluctuating wall pressure. Flow patterns near the reattachment line show the existence of the G€ortler vortices. By analyzing the curvature radius and G€ortler number distribution, it was found that a strong centrifuge instability is reserved in the compression corner region and reversed in the decompression corner region due to the convex streamline curvature. The downstream flow of the decompression corner is relatively complex where the additional shocklet and new streamwise vortices are observed. A negative response mechanism is found regarding fluctuating wall-pressure signatures between the upstream and downstream of the decompression corner |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000677517800008 |
论文分区 | 一类/力学重要期刊 |
力学所作者排名 | 1 |
RpAuthor | 刘洪伟 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/87689 |
专题 | 高温气体动力学国家重点实验室 |
作者单位 | 1.中国科学院力学研究所高温气体动力学国家重点实验室; 2.Shanghai Electromechanical Engineering Institute |
推荐引用方式 GB/T 7714 | 段俊亦,李欣,李新亮,等. Direct numerical simulation of a supersonic turbulent boundary layer over a compression–decompression corner[J]. Physics of Fluids,2021,33:065111. |
APA | 段俊亦,李欣,李新亮,&刘洪伟.(2021).Direct numerical simulation of a supersonic turbulent boundary layer over a compression–decompression corner.Physics of Fluids,33,065111. |
MLA | 段俊亦,et al."Direct numerical simulation of a supersonic turbulent boundary layer over a compression–decompression corner".Physics of Fluids 33(2021):065111. |
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