Fluctuating lift and drag on a long cylinder of square cross-section in a smooth and in a turbulent stream

Author:

Vickery B. J.

Abstract

The paper presents the results of measurements of fluctuating lift and drag on a long square cylinder. The measurements include the correlation of lift along the cylinder and the distribution of fluctuating pressure on a cross-section. The magnitude of the fluctuating lift was found to be considerably greater than that for a circular cross-section and the spanwise correlation much stronger.It was found that the presence of large-scale turbulence in the stream had a marked influence on both the steady and the fluctuating forces. The most significant changes were at small angles of attack (%alpha; < 10°) and included a reduction in base suction and a decrease in fluctuating lift of about 50%.

Publisher

Cambridge University Press (CUP)

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics

Reference12 articles.

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5. Vickery, B. J. 1965 On the flow behind a coarse grid and its use as a model of atmospheric turbulence in studies related to wind loads on buildings.NPL Aero. Rep. no. 1143.

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