Wall heat flux in supersonic turbulent expansion flow with shock impingement

doi:10.1080/14685248.2023.2260777

	Wall heat flux in supersonic turbulent expansion flow with shock impingement
	Tong FL(童福林)1; Duan JY(段俊亦)2,3 ; Yuan, Xianxu 1; Li XL(李新亮)2,3
通讯作者	Yuan, Xianxu([email protected])
发表期刊	JOURNAL OF TURBULENCE
	2023-09-21
页码	29
ISSN	1468-5248
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.
关键词	Expansion corner turbulent boundary layer shock impingement wall heat flux
DOI	10.1080/14685248.2023.2260777
收录类别	SCI
语种	英语
WOS记录号	WOS:001069448400001
关键词[WOS]	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
WOS类目	Mechanics ; Physics, Fluids & Plasmas
资助项目	National Key Ramp;D Program of China ; National Natural Science Foundation of China[2019YFA0405300] ; [11972356]
项目资助者	National Key Ramp;D Program of China ; National Natural Science Foundation of China
论文分区	Q3
力学所作者排名	2
RpAuthor	Yuan, Xianxu
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/92955
专题	高温气体动力学国家重点实验室
作者单位	1.State Key Lab Aerodynam, Mianyang 621000, Peoples R China; 2.Chinese Acad Sci, Inst Mech, LHD, Beijing, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Tong FL,Duan JY,Yuan, Xianxu,et al. Wall heat flux in supersonic turbulent expansion flow with shock impingement[J]. JOURNAL OF TURBULENCE,2023:29.Rp_Au:Yuan, Xianxu
APA	童福林,段俊亦,Yuan, Xianxu,&李新亮.(2023).Wall heat flux in supersonic turbulent expansion flow with shock impingement.JOURNAL OF TURBULENCE,29.
MLA	童福林,et al."Wall heat flux in supersonic turbulent expansion flow with shock impingement".JOURNAL OF TURBULENCE (2023):29.

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