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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 AuthorLi, Xin-Liang(lixl@imech.ac.cn)
Source PublicationPHYSICS OF FLUIDS
2019-10-01
Volume31Issue:10Pages:7
ISSN1070-6631
AbstractThe 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.
DOI10.1063/1.5115541
Indexed BySCI ; EI
Language英语
WOS IDWOS:000506026700018
WOS KeywordDIRECT NUMERICAL-SIMULATION ; WALL TEMPERATURE ; IDENTIFICATION ; REGION
WOS Research AreaMechanics ; Physics
WOS SubjectMechanics ; Physics, Fluids & Plasmas
Funding ProjectNSFC 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 OrganizationNSFC 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
Ranking1
ContributorLi, Xin-Liang
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81313
Collection高温气体动力学国家重点实验室
Affiliation1.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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