Statistical analysis of temperature distribution on vortex surfaces in hypersonic turbulent boundary layer | |
Lin X(林鑫)1,2; Tong FL(童福林)1,3; Yu ZP(于长平)1; Li XL(李新亮)1,2 | |
Corresponding Author | Li, Xin-Liang(lixl@imech.ac.cn) |
Source Publication | PHYSICS OF FLUIDS |
2019-10-01 | |
Volume | 31Issue:10Pages:7 |
ISSN | 1070-6631 |
Abstract | The nonuniform temperature distribution (NUTD) on the coherent vortex surfaces of hypersonic turbulent boundary layer (TBL) is studied using the conditional sampling technique. The direct numerical simulation data of Mach 8 flat-plate TBL flows with different wall temperatures, T-w/T-infinity = 10.03 and 1.9, are used for this research, and the coherent vortex surface is identified by the O-criterion. Two characteristic sides of the vortex are defined, which are represented by the positive and negative streamwise velocity fluctuations (+/- u') of the vortex surfaces. The conditional sampling results between the mean temperature of the two sides show that there is a significant difference of up to 20% at the same wall-normal location. Furthermore, the velocity-temperature fluctuation correlations (R-u'T' and R-v'T') at the characteristic sides of vortex surfaces are studied. It is found that the temperature fluctuations are redistributed by the vortex rotational motion that has taken effect through R-u'T' and R-v'T' and then lead to the NUTD. The NUTD features are changed quantitatively by wall cooling but share the similar mechanism as that of the higher-temperature case. Published under license by AIP Publishing. |
DOI | 10.1063/1.5115541 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000506026700018 |
WOS Keyword | DIRECT NUMERICAL-SIMULATION ; WALL TEMPERATURE ; IDENTIFICATION ; REGION |
WOS Research Area | Mechanics ; Physics |
WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
Funding Project | NSFC Project[91852203] ; NSFC Project[11472278] ; National Key Research and Development Program of China[2016YFA0401200] ; Science Challenge Project[TZ2016001] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA17030100] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDC01000000] |
Funding Organization | NSFC Project ; National Key Research and Development Program of China ; Science Challenge Project ; Strategic Priority Research Program of Chinese Academy of Sciences |
Classification | 一类/力学重要期刊 |
Ranking | 1 |
Contributor | Li, Xin-Liang |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/81313 |
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.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.China Aerodynam Res & Dev Ctr, Computat Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China |
Recommended Citation GB/T 7714 | Lin X,Tong FL,Yu ZP,et al. Statistical analysis of temperature distribution on vortex surfaces in hypersonic turbulent boundary layer[J]. PHYSICS OF FLUIDS,2019,31,10,:7. |
APA | 林鑫,童福林,于长平,&李新亮.(2019).Statistical analysis of temperature distribution on vortex surfaces in hypersonic turbulent boundary layer.PHYSICS OF FLUIDS,31(10),7. |
MLA | 林鑫,et al."Statistical analysis of temperature distribution on vortex surfaces in hypersonic turbulent boundary layer".PHYSICS OF FLUIDS 31.10(2019):7. |
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