On the turbulent heat flux and temperature variance in supersonic shock-wave boundary-layer interaction
文献类型：期刊论文
| 作者 | Tong FL(童福林)3; Ji XX(纪相鑫)1,2 ; Dong, Siwei3; Yuan, Xianxu3; Li XL(李新亮)1,2
|
| 刊名 | COMPUTERS & FLUIDS
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 284页码:13 |
| 关键词 | Shock wave Boundary layer Turbulent heat flux Temperature variance |
| ISSN号 | 0045-7930 |
| DOI | 10.1016/j.compfluid.2024.106444 |
| 通讯作者 | Tong, Fulin(515363491@qq.com) |
| 英文摘要 | The direct numerical simulation of an impinging oblique shock wave interacting with a spatially evolving turbulent boundary layer on a flat plat at Mach number 2.25 is used to investigate the characteristics of turbulent heat flux and temperature variance. Downstream of the interaction, the turbulent heat flux and temperature variance attain very large values in the outer region. The observed amplification of the turbulent heat flux is independent of the pressure-velocity correlation and is mainly characterized by mass flux. The coupling between temperature variance and turbulent kinetic energy is analyzed by examining the turbulent time-scale ratio. Across the interaction, the nearly constant time-scale ratio found in most parts of the boundary layer is generally smaller than the commonly accepted value of 0.5. The near-wall asymptotic behavior of the temperature variance is verified. Bidimensional empirical mode decomposition is adopted to analyze the contributions of different scale structures to the turbulent heat flux and temperature variance. This scale-decomposed analysis reveals that, compared with the upstream boundary layer, the shock interaction leads to increasingly pronounced contributions of the greatly enhanced outer large-scale structures and decreased contributions associated with the nearwall small-scale structures. In addition, an analysis of the primary budget terms in the transport of turbulent heat flux and temperature variance was performed. Unlike the upstream budget, the balance of production, destruction, and redistribution changes significantly in the downstream region. |
| 分类号 | 二类 |
| WOS关键词 | DIRECT NUMERICAL-SIMULATION ; LOW-FREQUENCY UNSTEADINESS ; CHANNEL FLOWS ; WALL |
| 资助项目 | National Natural Science Foun-dation of China[U2341277] ; National Natural Science Foun-dation of China[12232018] ; National Key R & D Program of China[2019YFA0405300] |
| WOS研究方向 | Computer Science ; Mechanics |
| 语种 | 英语 |
| WOS记录号 | WOS:001368794400001 |
| 资助机构 | National Natural Science Foun-dation of China ; National Key R & D Program of China |
| 其他责任者 | Tong, Fulin |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/97747]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China; 3.State Key Lab Aerodynam, Mianyang 621000, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Tong FL,Ji XX,Dong, Siwei,et al. On the turbulent heat flux and temperature variance in supersonic shock-wave boundary-layer interaction[J]. COMPUTERS & FLUIDS,2024,284:13. |
| APA | 童福林,纪相鑫,Dong, Siwei,Yuan, Xianxu,&李新亮.(2024).On the turbulent heat flux and temperature variance in supersonic shock-wave boundary-layer interaction.COMPUTERS & FLUIDS,284,13. |
| MLA | 童福林,et al."On the turbulent heat flux and temperature variance in supersonic shock-wave boundary-layer interaction".COMPUTERS & FLUIDS 284(2024):13. |
入库方式： OAI收割
来源：力学研究所
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