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Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

ACTIVE CONTROL OF VORTEX SHEDDING FROM A CYLINDER

pages 437-442
DOI: 10.1615/TSFP2.1470
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RESUMO

This paper describes, experimentally, the control of vortex shedding from circular cylinder at Reynolds number 400 using an active control system to stabilize the wake instability. The investigation has been carried by, quantitatively, hot-wire to measure the mean and fluctuating velocities and, qualitatively, by using smoke-wire flow visualization technique to examine the formation of the flow field downstream of the cylinder. It has been found that active control is able to shift the frequency of vortex from the nominal vortex shedding frequency. Also, it is influence the rate of entrainment from main flow into the wake flow.

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