| Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8 | |
Li, Xin ; Zhang, Siyuan1; Duan JY(段俊亦); Liu, Xiaobo; Wu, Wanghao
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| Source Publication | INTERNATIONAL JOURNAL OF MODERN PHYSICS C
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| 2022-07 | |
| Volume | 33Issue:7Pages:2250090 |
| ISSN | 0129-1831 |
| Abstract | The compressibility effect and transport motion in highspeed turbulent boundary layer (TBL) is a fundamental problem because they dominate the average and statistical characteristics. Using the statistical methods and flow visualization technology, flat-plate TBLs at Ma(infinity) = 8 with high- and low-wall temperatures, T-w/T-infinity = 10.03 and 1.9, are investigated based on the direct numerical simulation (DNS) datasets. Compared with previous studies, this study considers relative higher Mach number and strong cold wall temperature condition at the same time. First, the turbulent Mach number and turbulent intensity show that the compressibility effects are enhanced by the cooling process. Second, the high-order statistical moments and structure parameters confirm cold wall that causes stronger compressibility and the corresponding increased intensities of local streamwise and wall-normal transport motions. Finally, for uncovering the relationship between the compressibility effect and turbulent transport, more indepth visualization analyses of velocity streaks are performed. It is found that 'knot-like' structures are generated when cooling the wall, and they lead to stronger intermittent, which results in the rapid increase of local compressibility effect and the wall-normal transport motion. Our research sheds light on providing a theoretical basis for further understanding the compressibility effects of TBL at high Mach number. |
| Keyword | Direct numerical simulation turbulent boundary layer wall temperature effect high Mach number |
| Subject Area | Computer Science, Interdisciplinary Applications ; Physics, Mathematical |
| DOI | 10.1142/S0129183122500905 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000825477800006 |
| Funding Organization | NSFC Project [U20B2007] |
| Classification | Q3 |
| Ranking | 3 |
| Contributor | Zhang, SY (corresponding author), Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90175 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Shanghai Electromech Engn Inst, Shanghai 201109, Peoples R China 2.Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China 3.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Li, Xin,Zhang, Siyuan,Duan JY,et al. Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS C,2022,33,7,:2250090. |
| APA | Li, Xin,Zhang, Siyuan,段俊亦,Liu, Xiaobo,&Wu, Wanghao.(2022).Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8.INTERNATIONAL JOURNAL OF MODERN PHYSICS C,33(7),2250090. |
| MLA | Li, Xin,et al."Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8".INTERNATIONAL JOURNAL OF MODERN PHYSICS C 33.7(2022):2250090. |
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| Jp2022FA619.pdf（1752KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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