Control of mean and fluctuating forces on a circular cylinder at high Reynolds numbers

被引：8

作者：

Shao, Chuanping ^{[1
]}

Wang, Jianming

机构：

[1] Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China

[2] Peking Univ, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China

来源：

ACTA MECHANICA SINICA | 2007年 / 23卷 / 02期

基金：

中国国家自然科学基金;

关键词：

control; vortex shedding; circular cylinder; mean and fluctuating forces; high Reynolds number;

D O I：

10.1007/s10409-007-0055-8

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A narrow strip is used to control mean and fluctuating forces on a circular cylinder at Reynolds numbers from 2.0 x 10(4) to 1.0 x 10(5). The axes of the strip and cylinder are parallel. The control parameters are strip width ratio and strip position characterized by angle of attack and distance from the cylinder. Wind tunnel tests show that the vortex shedding from both sides of the cylinder can be suppressed, and mean drag and fluctuating lift on the cylinder can be reduced if the strip is installed in an effective zone downstream of the cylinder. A phenomenon of mono-side vortex shedding is found. The strip-induced local changes of velocity profiles in the near wake of the cylinder are measured, and the relation between base suction and peak value in the power spectrum of fluctuating lift is studied. The control mechanism is then discussed from different points of view.

引用

页码：133 / 143

页数：11

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[J]. Acta Mechanica Sinica, 2007, (02) : 133 - 143
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