Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer

doi:10.1063/5.0091731

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer
	Xu, Dehao 3; Wang, Jianchun 2; Yu, Changping 1; Li, Xinliang 1; Chen, Shiyi 2,3
刊名	PHYSICS OF FLUIDS
	2022-05-01
卷号	34 期号:5 页码:24
ISSN号	1070-6631
DOI	10.1063/5.0091731
通讯作者	Xu, Dehao(xudh@mail.sustech.edu.cn)
英文摘要	The effects of the wall temperature and local compressibility on the small-scale structures, local flow topology, and enstrophy production in the hypersonic turbulent boundary layer are numerically investigated. The colder wall temperature significantly enhances the unstable topologies and non-focal topologies near the wall, mainly due to stronger compressibility and more sheet-like structures. The eigenvalue decomposition of the strain rate tensor is introduced to investigate the mechanism of the enstrophy production and small-scale structures. It is shown that in the near wall region, the enstrophy production is mainly governed by the intermediate eigenvalue of strain-rate tensor through flow topologies unstable node/saddle/saddle (UN/S/S), stable focus/stretching (SFS), unstable focus/stretching, and unstable node/unstable node/unstable node, while the enstrophy destruction is primarily contributed by the intermediate eigenvalue through flow topologies stable node/saddle/saddle, stable focus/compressing (SFC), and stable node/stable node/stable node. Moreover, in the far wall region, the third eigenvalue in flow topology SFS and the intermediate eigenvalue in UN/S/S make major contributions to the enstrophy production, while the first eigenvalue in flow topologies unstable focus/compressing and SFC, and the intermediate eigenvalue in SFC mainly lead to the enstrophy destruction.& nbsp;Published under an exclusive license by AIP Publishing.
资助项目	NSFC Basic Science Center Program[11988102] ; National Natural Science Foundation of China (NSFC)[91952104] ; National Natural Science Foundation of China (NSFC)[92052301] ; National Natural Science Foundation of China (NSFC)[12172161] ; National Natural Science Foundation of China (NSFC)[91752201] ; Technology and Innovation Commission of Shenzhen Municipality[KQTD20180411143441009] ; Technology and Innovation Commission of Shenzhen Municipality[JCYJ20170412151759222] ; Department of Science and Technology of Guangdong Province[2019B21203001] ; Center for Computational Science and Engineering of Southern University of Science and Technology
WOS关键词	DIRECT NUMERICAL-SIMULATION ; VELOCITY-GRADIENT TENSOR ; FLOW TOPOLOGY ; DYNAMICS ; MOTIONS ; DERIVATIVES ; VORTICITY ; EVOLUTION ; DNS
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:000797897600003
资助机构	NSFC Basic Science Center Program ; National Natural Science Foundation of China (NSFC) ; Technology and Innovation Commission of Shenzhen Municipality ; Department of Science and Technology of Guangdong Province ; Center for Computational Science and Engineering of Southern University of Science and Technology
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89402]
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	Xu, Dehao
作者单位	1.Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100190, Peoples R China 2.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China 3.Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Xu, Dehao,Wang, Jianchun,Yu, Changping,et al. Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer[J]. PHYSICS OF FLUIDS,2022,34(5):24.
APA	Xu, Dehao,Wang, Jianchun,Yu, Changping,Li, Xinliang,&Chen, Shiyi.(2022).Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer.PHYSICS OF FLUIDS,34(5),24.
MLA	Xu, Dehao,et al."Effect of compressibility on the small-scale structures in hypersonic turbulent boundary layer".PHYSICS OF FLUIDS 34.5(2022):24.