Extremely high wall pressure events in shock wave and turbulent boundary layer interactions using DNS data

doi:10.1016/j.cja.2024.07.008

	Extremely high wall pressure events in shock wave and turbulent boundary layer interactions using DNS data
	Limei, Junjie ; Yuan, Xianxu ; Dong, Siwei ; Li XL(李新亮); Tong FL(童福林)
发表期刊	CHINESE JOURNAL OF AERONAUTICS
	2024-11
卷号	37 期号:11 页码:81-93
ISSN	1000-9361
摘要	This study investigates high-amplitude Extreme Wall Pressure fluctuation Events (EWPEs) in Shock wave/Turbulent Boundary Layer Interactions (STBLIs) through the conditional sampling of direct numerical simulation databases. The aim is to evaluate the effect of STBLIs and their strength on the statistical properties and associated turbulent structures of EWPEs using the conditional-averaging and clustering method. The temporal statistical results show that the occurrence probability and contribution ratio of EWPEs decrease downstream of strong STBLI, but their duration and interval time increase. Regarding two-dimensional wall pressure structures, the large population of small-scale structures becomes more elongated, but strong interactions induce a greater number of large-scale structures. The pairing of wall pressure events with a higher occurrence probability is verified by the joint probability density functions. Conditional analysis reveals that, as the interaction strength increases, the ejection motion associated with positive events occurs farther downstream and the spanwise vortex core locating above negative events is lifted up along the wall-normal direction. Moreover, analysis associates the paired wall pressure events with the sweep, ejection, and swirl motions in STBLIs, where hairpin eddies play an important role in the formation of positive-negative paired wall pressure structures. (c) 2024 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
关键词	Wall pressure fluctuations Extreme pressure events Shock wave Turbulent boundary layer Direct numerical simulation
DOI	10.1016/j.cja.2024.07.008
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:001353396900001
WOS研究方向	Engineering
WOS类目	Engineering, Aerospace
论文分区	一类
力学所作者排名	3+
RpAuthor	Tong FL
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/97218
专题	高温气体动力学国家重点实验室
作者单位	1.【Limei, Junjie & Yuan, Xianxu & Dong, Siwei & Tong, Fulin】 State Key Lab Aerodynam, Mianyang 621000, Peoples R China 2.【Li, Xinliang】 Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Limei, Junjie,Yuan, Xianxu,Dong, Siwei,et al. Extremely high wall pressure events in shock wave and turbulent boundary layer interactions using DNS data[J]. CHINESE JOURNAL OF AERONAUTICS,2024,37,11,:81-93.Rp_Au:Tong FL
APA	Limei, Junjie,Yuan, Xianxu,Dong, Siwei,李新亮,&童福林.(2024).Extremely high wall pressure events in shock wave and turbulent boundary layer interactions using DNS data.CHINESE JOURNAL OF AERONAUTICS,37(11),81-93.
MLA	Limei, Junjie,et al."Extremely high wall pressure events in shock wave and turbulent boundary layer interactions using DNS data".CHINESE JOURNAL OF AERONAUTICS 37.11(2024):81-93.