Vortex simulation of leading-edge separation bubble with local forcing

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A numerical study is made of the flow control of leading-edge separation bubbles in a two-dimensional semi-infinite blunt plate, which is aligned parallel to the main stream. A version of the discrete-vortex method is utilized. A time-dependent point source of small magnitude is introduced near the separation edge. The effect of local source forcing on the evolution of a leading-edge separation bubble is scrutinized by varying the strength and the forcing frequency of the source. It is found that the reattachment length attains a single minimum at lower forcing levels, while it shows double minima at moderately high forcing levels. Based on the numerical results, the mechanism of decreasing reattachment length is pursued. These findings are qualitatively consistent with the existing experimental results for a blunt circular cylinder.
Publisher
IOP PUBLISHING LTD
Issue Date
1996
Language
English
Article Type
Article
Keywords

FLOW; LAMINAR

Citation

FLUID DYNAMICS RESEARCH, v.18, pp.99 - 115

ISSN
0169-5983
URI
http://hdl.handle.net/10203/13575
Appears in Collection
ME-Journal Papers(저널논문)
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