| Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction | |
Tong FL(童福林)1,2,3; Duan JY(段俊亦)1,4 ; Li XL(李新亮)1,4
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| Corresponding Author | Tong, Fulin([email protected]) |
| Source Publication | JOURNAL OF TURBULENCE
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| 2021-09-07 | |
| Pages | 23 |
| ISSN | 1468-5248 |
| Abstract | The wall-shear stress (WSS) fluctuations in the interaction of an oblique shock wave with a flat-plate turbulent boundary layer are investigated by means of direct numerical simulation (DNS) at Mach 2.25. The numerical results agree very well with previous experiments and DNS data in terms of turbulence statistics, wall pressure, and skin friction. The fluctuating WSS characteristics, including probability density function (PDF), frequency spectrum, space-time correlation, and convection velocity, are analysed systematically. It is found that the positively skewed PDF shape of the streamwise WSS fluctuations is significantly changed due to the presence of a separation bubble, while the PDF shape of the spanwise component is slightly affected, exhibiting a symmetric behaviour across the interaction. The weighted power-spectrum density map indicates that the low-frequency unsteadiness associated with the separated shock - exhibits little influence on the spectrum for either component, and no enhancement of the low-frequency energy is observed. A significant reduction in the spatial extent of the two-point correlation is observed, causing spanwise elongated coherence for the streamwise WSS fluctuations in the separation region. Moreover, the elliptic behaviour of the space-time correlations is essentially preserved throughout the interaction, and this is accompanied by a sudden reduction of the convection velocity in the separation bubble. |
| Keyword | Wall-shear stress shock wave turbulent boundary layers |
| DOI | 10.1080/14685248.2021.1974466 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000695127700001 |
| WOS Keyword | DIRECT NUMERICAL-SIMULATION ; PRESSURE-FLUCTUATIONS ; BENEATH |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China[11972356] ; National Natural Science Foundation of China[91852203] ; National Key R&D Program of China[2019YFA0405300] |
| Funding Organization | National Natural Science Foundation of China ; National Key R&D Program of China |
| Classification | Q3 |
| Ranking | 1 |
| Contributor | Tong, Fulin |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/87406 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China; 2.China Aerodynam Res & Dev Ctr, State Key Lab Aerodynam, Mianyang 621000, Sichuan, Peoples R China; 3.China Aerodynam Res & Dev Ctr, Computat Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Tong FL,Duan JY,Li XL. Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction[J]. JOURNAL OF TURBULENCE,2021:23.Rp_Au:Tong, Fulin |
| APA | 童福林,段俊亦,&李新亮.(2021).Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction.JOURNAL OF TURBULENCE,23. |
| MLA | 童福林,et al."Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction".JOURNAL OF TURBULENCE (2021):23. |
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| Jp2021F415.pdf（5190KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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