Wall heat flux in supersonic turbulent expansion flow with shock impingement

doi:10.1080/14685248.2023.2260777

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

	Wall heat flux in supersonic turbulent expansion flow with shock impingement
	Tong, Fulin 3; Duan, Junyi 1,2; Yuan, Xianxu 3; Li, Xinliang 1,2
刊名	JOURNAL OF TURBULENCE
	2023-09-21
页码	29
关键词	Expansion corner turbulent boundary layer shock impingement wall heat flux
ISSN号	1468-5248
DOI	10.1080/14685248.2023.2260777
通讯作者	Yuan, Xianxu(yuanxianxu@cardc.cn)
英文摘要	We perform direct numerical simulations to investigate the characteristics of wall heat flux (WHF) in the interaction of an oblique shock wave at an angle of 33.2 & DEG; and free-stream Mach number M & INFIN; = 2.25 impinging on supersonic turbulent expansion corners with deflection angles of 0o (flat plate), 6o and 12o. The effect of the expansion on the WHF characteristics is analysed by comparing it to the interaction with the flat plate under the same flow conditions and a fixed shock impingement point. In the post-expansion region, the decreased mean WHF is found to collapse onto the flat plate case when scaled with the mean wall pressure. The statistical properties of the WHF fluctuations, including probability density function, frequency spectra, and space-time correlations, are comparatively analysed. The expansion causes an increase in the occurrence probability of negative extreme events, an enhancement of high-frequency energy, and an inhibition of intermediate-frequency energy. The increased expansion angle also results in a faster recovery of characteristic spanwise length scales and an increase in convection velocity. We use the mean WHF decomposition method in conjunction with bidimensional empirical mode decomposition to quantitatively analyse the impact of expansion on scale contributions. It is demonstrated that the presence of the expansion corner has no significant impact on the decomposed results, but it significantly reduces the contribution associated with outer large-scale structures.
资助项目	National Key Ramp;D Program of China ; National Natural Science Foundation of China[2019YFA0405300] ; [11972356]
WOS关键词	DIRECT NUMERICAL-SIMULATION ; WAVE/BOUNDARY-LAYER INTERACTION ; LOW-FREQUENCY UNSTEADINESS ; LARGE-EDDY SIMULATION ; BOUNDARY-LAYER ; SKIN-FRICTION ; WAVE ; FLUCTUATIONS
WOS研究方向	Mechanics ; Physics
语种	英语
WOS记录号	WOS:001069448400001
资助机构	National Key Ramp;D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92954]
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	Yuan, Xianxu
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Mech, LHD, Beijing, Peoples R China 3.State Key Lab Aerodynam, Mianyang 621000, Peoples R China
推荐引用方式 GB/T 7714	Tong, Fulin,Duan, Junyi,Yuan, Xianxu,et al. Wall heat flux in supersonic turbulent expansion flow with shock impingement[J]. JOURNAL OF TURBULENCE,2023:29.
APA	Tong, Fulin,Duan, Junyi,Yuan, Xianxu,&Li, Xinliang.(2023).Wall heat flux in supersonic turbulent expansion flow with shock impingement.JOURNAL OF TURBULENCE,29.
MLA	Tong, Fulin,et al."Wall heat flux in supersonic turbulent expansion flow with shock impingement".JOURNAL OF TURBULENCE (2023):29.