Amplification of turbulent kinetic energy and temperature fluctuation in a hypersonic turbulent boundary layer over a compression ramp

doi:10.1063/5.0145320

	Amplification of turbulent kinetic energy and temperature fluctuation in a hypersonic turbulent boundary layer over a compression ramp
	Guo TB(郭同彪); Zhang J(张吉); Tong FL(童福林); Li XL(李新亮)
发表期刊	PHYSICS OF FLUIDS
	2023-04
卷号	35 期号:4 页码:46118
ISSN	1070-6631
摘要	In this paper, direct numerical simulations in a Mach 6.0 hypersonic turbulent boundary layer over a 30 degrees compression ramp are performed. The influence of shock wave/boundary layer interactions on the amplification of turbulent kinetic energy (TKE) and temperature fluctuation (TF) is explored, to provide an insight into the physical mechanism. In the initial part of the interaction region before the detachment of the shear layer, the amplification of the TKE and TF is found, via a frequency spectrum analysis, to be closely related to the low-frequency unsteadiness of the shock wave. Once the free shear layer is established, the shear component of the TKE production defined in the shear layer coordinate appears to act as the main contributor for the TKE amplification, owing to the mixing layer turbulence and the resultant Kelvin-Helmholtz instability. This is consistent with the result from the spectrum analysis that the TKE and TF amplification and their streamwise evolution are dominated by the spectral energy in the median-frequency range, arising from the mixing layer turbulence. As the flow moves downstream along the shock wave, the high-frequency spectral energy content of TF shows a decreasing trend, while the low-frequency spectral energy tends to increase gradually, implying that the shock wave low-frequency unsteadiness exists not only in the initial stage of the interaction region but also around the main shock wave. Under the combined influence of the shock wave intensity and interaction intensity, the median-frequency content appears to weaken first and then tends to increase before decreasing again. The variation amplitude appears to be small and generally dominates the distribution of the TF intensity.
DOI	10.1063/5.0145320
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001003542700003
WOS研究方向	Mechanics ; Physics, Fluids & Plasmas
项目资助者	National Key Research and Development Program of China [2019YFA0405300] ; National Natural Science Foundation of China [12232018, 91852203, 12072349, 12202457] ; Innovation Fund of Shanghai Aerospace Science and Technology [SAST2021001] ; China Postdoctoral Science Foundation [2022M723232]
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Li, XL (corresponding author), Chinese Acad Sci, Inst Mech, LHD, Beijing 100190, Peoples R China. ; Li, XL (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/92427
专题	高温气体动力学国家重点实验室
作者单位	1.{Guo Tongbiao, Zhang Ji, Li Xinliang} Chinese Acad Sci Inst Mech LHD Beijing 100190 Peoples R China 2.{Zhang Ji, Li Xinliang} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 3.{Tong Fulin} State Key Lab Aerodynam Mianyang 621000 Peoples R China
推荐引用方式 GB/T 7714	Guo TB,Zhang J,Tong FL,et al. Amplification of turbulent kinetic energy and temperature fluctuation in a hypersonic turbulent boundary layer over a compression ramp[J]. PHYSICS OF FLUIDS,2023,35,4,:46118.
APA	郭同彪,张吉,童福林,&李新亮.(2023).Amplification of turbulent kinetic energy and temperature fluctuation in a hypersonic turbulent boundary layer over a compression ramp.PHYSICS OF FLUIDS,35(4),46118.
MLA	郭同彪,et al."Amplification of turbulent kinetic energy and temperature fluctuation in a hypersonic turbulent boundary layer over a compression ramp".PHYSICS OF FLUIDS 35.4(2023):46118.

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