| Direct Numerical Simulation on Mach Number and Wall Temperature Effects in the Turbulent Flows of Flat-Plate Boundary Layer | |
| Alternative Title | COMMUNICATIONS IN COMPUTATIONAL PHYSICS |
Liang X ; Li XL(李新亮); Li, XL (reprint author), Chinese Acad Sci, Inst Mech, LHD, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China.
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| Source Publication | COMMUNICATIONS IN COMPUTATIONAL PHYSICS
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| 2015-01 | |
| Volume | 17Issue:1Pages:189-212 |
| ISSN | 1815-2406 |
| Abstract | In this paper, direct numerical simulation (DNS) is presented for spatially evolving turbulent boundary layer over an isothermal flat-plate at Ma(infinity) = 2.25,5,6,8. When Ma(infinity) = 8, two cases with the ratio of wall-to-reference temperature T-w/T-infinity = 1.9 and 10.03 are considered respectively. The wall temperature approaches recovery temperatures for other cases. The characteristics of compressible turbulent boundary layer (CTBL) affected by freestream Mach number and wall temperature are investigated. It focuses on assessing compressibility effects and the validity of Morkovin's hypothesis through computing and analyzing the mean velocity profile, turbulent intensity, the strong Reynolds analogy (SRA) and possibility density function of dilatation term. The results show that, when the wall temperature approaches recovery temperature, the effects of Mach number on compressibility is insignificant. As a result, the compressibility effect is very weak and the Morkovin's hypothesis is still valid for Mach number even up to 8. However, when Mach number equal to 8, the wall temperature effect on the compressibility is sensitive. In this case, when T-w/T-infinity = 1.9, the Morkovin's hypothesis is not fully valid. The validity of classical SRA depends on wall temperature directly. A new modified SRA is proposed to eliminate such negative factor in near wall region. Finally the effects of Mach number and wall temperature on streaks are also studied. |
| Keyword | Hypersonic Directly Numerical Simulation Compressibility Effects Turbulent Boundary Layer Strong Reynolds Analogy |
| DOI | 10.4208/cicp.221113.280714a |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000353692300007 |
| WOS Keyword | HIGH-ORDER ; WENO SCHEME ; CONVECTION ; RESOLUTION ; DNS |
| WOS Research Area | Physics |
| WOS Subject | Physics, Mathematical |
| Funding Organization | NSFC Projects [11072248] ; 973 Program [2009CB724100] ; 863 Program [2012AA01A304] ; CAS Information Project [INFO-115-B01] |
| Department | LHD可压缩湍流 |
| Classification | 二类/Q1 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49988 |
| Collection | 高温气体动力学国家重点实验室 |
| Corresponding Author | Li, XL (reprint author), Chinese Acad Sci, Inst Mech, LHD, 15 Beisihuanxi Rd, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Liang X,Li XL,Li, XL . Direct Numerical Simulation on Mach Number and Wall Temperature Effects in the Turbulent Flows of Flat-Plate Boundary Layer[J]. COMMUNICATIONS IN COMPUTATIONAL PHYSICS,2015,17,1,:189-212. |
| APA | Liang X,Li XL,&Li, XL .(2015).Direct Numerical Simulation on Mach Number and Wall Temperature Effects in the Turbulent Flows of Flat-Plate Boundary Layer.COMMUNICATIONS IN COMPUTATIONAL PHYSICS,17(1),189-212. |
| MLA | Liang X,et al."Direct Numerical Simulation on Mach Number and Wall Temperature Effects in the Turbulent Flows of Flat-Plate Boundary Layer".COMMUNICATIONS IN COMPUTATIONAL PHYSICS 17.1(2015):189-212. |
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| IMCAS-J2015-084.pdf（860KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-ND | View Download | |
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