Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8

doi:10.1142/S0129183122500905

	Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8
	Li, Xin; Zhang, Siyuan 1; Duan JY(段俊亦); Liu, Xiaobo ; Wu, Wanghao
发表期刊	INTERNATIONAL JOURNAL OF MODERN PHYSICS C
	2022-07
卷号	33 期号:7 页码:2250090
ISSN	0129-1831
摘要	The compressibility effect and transport motion in highspeed turbulent boundary layer (TBL) is a fundamental problem because they dominate the average and statistical characteristics. Using the statistical methods and flow visualization technology, flat-plate TBLs at Ma(infinity) = 8 with high- and low-wall temperatures, T-w/T-infinity = 10.03 and 1.9, are investigated based on the direct numerical simulation (DNS) datasets. Compared with previous studies, this study considers relative higher Mach number and strong cold wall temperature condition at the same time. First, the turbulent Mach number and turbulent intensity show that the compressibility effects are enhanced by the cooling process. Second, the high-order statistical moments and structure parameters confirm cold wall that causes stronger compressibility and the corresponding increased intensities of local streamwise and wall-normal transport motions. Finally, for uncovering the relationship between the compressibility effect and turbulent transport, more indepth visualization analyses of velocity streaks are performed. It is found that 'knot-like' structures are generated when cooling the wall, and they lead to stronger intermittent, which results in the rapid increase of local compressibility effect and the wall-normal transport motion. Our research sheds light on providing a theoretical basis for further understanding the compressibility effects of TBL at high Mach number.
关键词	Direct numerical simulation turbulent boundary layer wall temperature effect high Mach number
学科领域	Computer Science, Interdisciplinary Applications ; Physics, Mathematical
DOI	10.1142/S0129183122500905
收录类别	SCI
语种	英语
WOS记录号	WOS:000825477800006
项目资助者	NSFC Project [U20B2007]
论文分区	Q3
力学所作者排名	3
RpAuthor	Zhang, SY (corresponding author), Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China.
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90175
专题	高温气体动力学国家重点实验室
作者单位	1.Shanghai Electromech Engn Inst, Shanghai 201109, Peoples R China 2.Univ Shanghai Sci & Technol, Sch Mech Engn, Shanghai 200093, Peoples R China 3.Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Xin,Zhang, Siyuan,Duan JY,et al. Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8[J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS C,2022,33,7,:2250090.
APA	Li, Xin,Zhang, Siyuan,段俊亦,Liu, Xiaobo,&Wu, Wanghao.(2022).Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8.INTERNATIONAL JOURNAL OF MODERN PHYSICS C,33(7),2250090.
MLA	Li, Xin,et al."Properties of the compressibility and transport motion in wall-bounded turbulent flows at Mach 8".INTERNATIONAL JOURNAL OF MODERN PHYSICS C 33.7(2022):2250090.

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