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

doi:10.1063/5.0145320

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

	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)
刊名	PHYSICS OF FLUIDS ; 4
	2023-04
卷号	35 页码:46118
ISSN号	1070-6631
DOI	10.1063/5.0145320
英文摘要	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.
分类号	一类/力学重要期刊
WOS研究方向	Mechanics ; Physics, Fluids & Plasmas
语种	英语
WOS记录号	WOS:001003542700003
资助机构	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]
其他责任者	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.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92427]
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.{Tong Fulin} State Key Lab Aerodynam Mianyang 621000 Peoples R China 2.{Zhang Ji, Li Xinliang} Univ Chinese Acad Sci Sch Engn Sci Beijing 100049 Peoples R China 3.{Guo Tongbiao, Zhang Ji, Li Xinliang} Chinese Acad Sci Inst Mech LHD Beijing 100190 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, 4,2023,35:46118.
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,35,46118.
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(2023):46118.