Vortex Structures and Behavior of a Flow Past Two Rotating Circular Cylinders Arranged Side-by-Side

GUO Xiao-Hui; LIN Jian-Zhong; NIE De-Ming

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Vortex Structures and Behavior of a Flow Past Two Rotating Circular Cylinders Arranged Side-by-Side

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We present a study on the vortex structures and behavior of a Sow past two rotating circular cylinders arranged side-by-side at a range of absolute rotational speeds (|a| ≤ 2) for two different gap spacings g* = 1.5 and 0.7 at Reynolds numbers Re = 160 and 200. The results show that the flow becomes stabilized and finally steady beyond the critical rotational speed as|a| increases, regardless of the variation in Re and g". The value of critical rotational speed increases with increasing Re. The wake patterns change in the unsteady regimes for g* = 1.5 and 0.7. With increasing|a|, the time-averaged drag coefficient Cd decreases and the lift coefficient Cl increases, respectively. Cp at Re = 160 and g* = 0.7 decreases rapidly, resulting in the smallest value at the same |a| for 1 ≤ |a|≤ 2. Cd augments with increasing g* at the same|a|. For g* = 1.5, Cd has a little disparity between the cases of Re = 160 and 200. For the How past two still cyhnders, (C)L is inversely proportional to g* of two cylinders for a fixed |a|, and is not dependent on Re.

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《中国物理快报：英文版》 |2009年第8期|177-180|共4页
作者
GUO Xiao-Hui; LIN Jian-Zhong; NIE De-Ming;
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作者单位

Institute of Fluid Mechanics, China Jiliang University, Hangzhou 310018;

Institute of Fluid Mechanics, China Jiliang University, Hangzhou 310018;

Department of Mechanics, Zhejiang University, Hangzhou 310027;

Institute of Fluid Mechanics, China Jiliang University, Hangzhou 310018;

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正文语种 chi
中图分类物理学;
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Vortex Structures and Behavior of a Flow Past Two Rotating Circular Cylinders Arranged Side-by-Side

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