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Title: An improved micro-vortex generator in supersonic flows
Author: Zhang, Binbin1, 2; Zhao, Qingjun1, 3; Xiang, Xiaorong1; Xu, Jianzhong1
Source: AEROSPACE SCIENCE AND TECHNOLOGY
Issued Date: 2015-12-01
Volume: 47, Pages:210-215
Keyword: Micro-ramp ; Shock-boundary layer interaction ; Passive control
DOI: 10.1016/j.ast.2015.09.029
DOC Type: Article
English Abstract: The micro-vortex generator has currently received much attention as a passive flow control device in supersonic flow. This paper investigates the induced velocity and the trajectory of the vortices generated by micro-vortex generators by using the point vortex model. The analysis suggests that counter-rotating vortices could adversely affect each other and this effect depends on the distance of the counter-rotating vortices. A novel micro-ramp for boundary layer control, called dissymmetric micro-ramp, was put forward on the basis of this analysis. The effect the dissymmetric micro-ramp was numerically studied at a free stream Mach number of 2.5 via RANS simulations. The vortices generated by these devices have similar path and dissipation with the ones generated by traditional devices. There is a constant drop of vorticity in the development and dissipation of these vortices. The vorticity in dissymmetric micro-ramps is stronger than that in standard micro-ramp. On the other hand, the vortex height from wall in dissymmetric micro-ramps is smaller than in standard micro-ramp. This effect also suggests that vortex in dissymmetric micro-ramp is apt to maintain in boundary layer. (C) 2015 Elsevier Masson SAS. All rights reserved.
WOS Headings: Science & Technology ; Technology
WOS Subject: Engineering, Aerospace
WOS Subject Extended: Engineering
WOS Keyword Plus: LAYER INTERACTION
Indexed Type: SCI
Funder: National Basic Research Program of China(2010CB227302) ; National Natural Science Foundation of China(51206162)
Language: 英语
WOS ID: WOS:000366538500021
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Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112318
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Key Lab Light Duty Gas Turbine, Beijing 100190, Peoples R China
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