Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction

doi:10.1080/14685248.2021.1974466

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

	Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction
	Tong FL(童福林)2,3,4; Duan JY(段俊亦)1,4; Li XL(李新亮)1,4
刊名	JOURNAL OF TURBULENCE
	2021-09-07
页码	23
关键词	Wall-shear stress shock wave turbulent boundary layers
ISSN号	1468-5248
DOI	10.1080/14685248.2021.1974466
通讯作者	Tong, Fulin(515363491@qq.com)
英文摘要	The wall-shear stress (WSS) fluctuations in the interaction of an oblique shock wave with a flat-plate turbulent boundary layer are investigated by means of direct numerical simulation (DNS) at Mach 2.25. The numerical results agree very well with previous experiments and DNS data in terms of turbulence statistics, wall pressure, and skin friction. The fluctuating WSS characteristics, including probability density function (PDF), frequency spectrum, space-time correlation, and convection velocity, are analysed systematically. It is found that the positively skewed PDF shape of the streamwise WSS fluctuations is significantly changed due to the presence of a separation bubble, while the PDF shape of the spanwise component is slightly affected, exhibiting a symmetric behaviour across the interaction. The weighted power-spectrum density map indicates that the low-frequency unsteadiness associated with the separated shock - exhibits little influence on the spectrum for either component, and no enhancement of the low-frequency energy is observed. A significant reduction in the spatial extent of the two-point correlation is observed, causing spanwise elongated coherence for the streamwise WSS fluctuations in the separation region. Moreover, the elliptic behaviour of the space-time correlations is essentially preserved throughout the interaction, and this is accompanied by a sudden reduction of the convection velocity in the separation bubble.
分类号	Q3
资助项目	National Natural Science Foundation of China[11972356] ; National Natural Science Foundation of China[91852203] ; National Key R&D Program of China[2019YFA0405300]
WOS关键词	DIRECT NUMERICAL-SIMULATION ; PRESSURE-FLUCTUATIONS ; BENEATH
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:000695127700001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
其他责任者	Tong, Fulin
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87405]
专题	力学研究所_高温气体动力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 2.China Aerodynam Res & Dev Ctr, Computat Aerodynam Inst, Mianyang 621000, Sichuan, Peoples R China; 3.China Aerodynam Res & Dev Ctr, State Key Lab Aerodynam, Mianyang 621000, Sichuan, Peoples R China; 4.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Tong FL,Duan JY,Li XL. Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction[J]. JOURNAL OF TURBULENCE,2021:23.
APA	童福林,段俊亦,&李新亮.(2021).Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction.JOURNAL OF TURBULENCE,23.
MLA	童福林,et al."Characteristics of wall-shear stress fluctuations in shock wave and turbulent boundary layer interaction".JOURNAL OF TURBULENCE (2021):23.