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

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Abstract

A narrow strip is used to control mean and fluctuating forces on a circular cylinder at Reynolds numbers from 2.0 ×  104 to 1.0 ×  105. 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.

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Authors and Affiliations

  1. Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080, China

    Chuanping Shao

  2. State Key Laboratory for Turbulence and Complex System, Peking University, Beijing, 100871, China

    Jianming Wang

Authors
  1. Chuanping Shao
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  2. Jianming Wang
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Correspondence to Chuanping Shao.

Additional information

The project supported by the National Natural Science Foundation of China (10172087 and 10472124).

The English text was polished by Yunming Chen.

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Shao, C., Wang, J. Control of mean and fluctuating forces on a circular cylinder at high Reynolds numbers. Acta Mech Sin 23, 133–143 (2007). https://doi.org/10.1007/s10409-007-0055-8

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  • DOI: https://doi.org/10.1007/s10409-007-0055-8

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