Investigations on the turbulent/non-turbulent interface in supersonic compressible plate turbulent boundary layer
文献类型：期刊论文
| 作者 | Su, Shuhuai2; Long, Yanguang2; Wang, Jinjun2; Li, Xinliang1 ; Li XL(李新亮)
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| 刊名 | JOURNAL OF FLUID MECHANICS
 |
| 出版日期 | 2024-06-03 |
| 卷号 | 988页码:32 |
| 关键词 | turbulent boundary layers compressible turbulence compressible boundary layers |
| ISSN号 | 0022-1120 |
| DOI | 10.1017/jfm.2024.439 |
| 通讯作者 | Wang, Jinjun(jjwang@buaa.edu.cn) |
| 英文摘要 | The turbulent boundary layer (TBL) is a widely existing flow phenomenon in nature and engineering applications. Its strong mixing effect can achieve more sufficient material mixing, heat transport, etc. The understanding of the entrainment process and mechanism of irrotational fluids entering the turbulent region can be promoted by studying the geometric and dynamic characteristics of turbulent/non-turbulent interfaces (TNTI). In compressible flow, it is unclear whether the properties of TNTI will change and whether the entrainment will show different features due to the influence of compressibility. Based on the direct numerical simulation results of supersonic compressible plate TBLs with Mach number of 2.9, the geometric and dynamic characteristics of TNTI are investigated in this paper. The interface is identified by the enstrophy method, and the height, thickness, fractal dimension, enstrophy transportation and entrainment characteristics of the interface are investigated. It is found that for the enstrophy transportation in a TBL, the contribution of compressibility-related terms accounts for approximately 13.4 % of the total enstrophy transportation, which tends to transfer the enstrophy of turbulence near the interface to both directions vertical to the interface. This promotes the expansion of the turbulent region towards the non-turbulent region, and the mean height, thickness and entrainment velocity are increased by approximately 3.7 %, 7.0 % and 8.5 %, respectively, while the fractal dimension is basically unaffected. Different from the incompressible flow, the contribution of the compressibility-related terms to the entrainment velocity is independent of the local curvature, and the intense entrainment process is more likely to occur on a highly curved concave surface. |
| WOS关键词 | DIRECT NUMERICAL-SIMULATION ; ENTRAINMENT ; MOTIONS |
| 资助项目 | National Natural Science Foundation of China[91852206] ; National Natural Science Foundation of China[11721202] |
| WOS研究方向 | Mechanics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001237592300001 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/95498]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 通讯作者 | Wang, Jinjun |
| 作者单位 | 1.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China 2.Beihang Univ, Fluid Mech Key Lab Educ Minist, Beijing 100191, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, Shuhuai,Long, Yanguang,Wang, Jinjun,et al. Investigations on the turbulent/non-turbulent interface in supersonic compressible plate turbulent boundary layer[J]. JOURNAL OF FLUID MECHANICS,2024,988:32. |
| APA | Su, Shuhuai,Long, Yanguang,Wang, Jinjun,Li, Xinliang,&李新亮.(2024).Investigations on the turbulent/non-turbulent interface in supersonic compressible plate turbulent boundary layer.JOURNAL OF FLUID MECHANICS,988,32. |
| MLA | Su, Shuhuai,et al."Investigations on the turbulent/non-turbulent interface in supersonic compressible plate turbulent boundary layer".JOURNAL OF FLUID MECHANICS 988(2024):32. |
入库方式： OAI收割
来源：力学研究所
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