EXPERIMENTAL INVESTIGATION ON ORDERED AND CHAOTIC PHENOMENA OF VORTEX SHEDDING IN THE WAKE FLOW BEHIND A TWO-DIMENSIONAL CIRCULAR CYLINDER

被引：1
|
作者：
魏中磊
吴忠
H.E.FIEDLER
机构：
[1] Hermann-Fottinger Institut
[2] Technische Universitat Berlin
[3] PRC
[4] Beijing 100871
[5] Peking University
[6] Department of Mechnics
[7] 1000 Berlin 12
来源：
Science China Mathematics | 1992年 / 01期
基金：
中国国家自然科学基金;
关键词：
ordered and chaotic phenomena; vortex shedding; wake;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, some preliminary experiments of ordered and chaotic vortex sheddingsbehind a 2--D circular cylinder at Reynolds numbers ranging from R=50 to 400 are presented.A transition in vortex shedding from the laminar to chaotic state occurs at Re=184.6-193.5,but it is seemingly not through the quasi--periodicity routes. There is a couple of dis-continuities in slope on the curve of the relationship between the vortex shedding frequencyand Reynolds number. The discontinuity at Re = 70 might correspond to the change of themode of the oblique vortex shedding. The second one at Re = 193.5 is responsible for thetransition from the ordered to the chaotic state.
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页码：81 / 90
页数：10
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