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

Published online by Cambridge University Press:  28 March 2006

B. J. Vickery
B. J. Vickery
Affiliation:
School of Civil Engineering, University of Sydney, Australia
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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%.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 25 , Issue 3 , July 1966 , pp. 481 - 494
Copyright
© 1966 Cambridge University Press

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References

El Baroudi, M. Y. 1960 Measurement of two-point correlations of velocity near a circular cylinder shedding a Karman vortex sheet. UTIA Tech. Note, no. 31.Google Scholar
Humphreys, J. S. 1960 On a circular cylinder in a steady wind at transition Reynolds numbers. J. Fluid Mech. 8, 603–12.Google Scholar
Keefe, R. T. 1962 An investigation of the fluctuating forces acting on a stationary circular cylinder in a subsonic stream and of the associated sound field. UTIA Rep. no. 76; and J.A.S.A. 34, 1711–14.Google Scholar
Mcgregor, D. M. 1957 An experimental investigation of the oscillating pressures on a circular cylinder in a fluid. University of Toronto. UTIA Tech. Note, no. 14.Google Scholar
Maskell, E. C. 1963 A theory of the blockage effects on bluff bodies and stalled wings in a closed wind tunnel. R.A.E. Aero. Rep. no. 2685.Google Scholar
Prendergast, V. 1958 Measurements of two-point correlations of the surface pressure on a circular cylinder. UTIA Tech. Note, no. 23.Google Scholar
Roshko, A. 1954 On the drag and shedding frequency of two-dimensional bluff bodies. NACA TN no. 3169.Google Scholar
Ross, D. 1964 Vortex-shedding sounds of propellers. Rep. no. 1115. Bolt, Beranek and Newman.
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.Google Scholar
Vickery, B. J. & Watkins, R. D. 1963 Flow induced vibrations of circular cylinders. Proc. 1st Aust. Conf. on Hyd. and Fluid Mech. London: Pergamon Press.
Vickery, B. J. & Walshe, D. E. J. 1965 An aerodynamic investigation for a proposed multi-flue smokestack at Fawley Power Station. NPL Aero. Rep. no. 1132.Google Scholar
Whitbread, R. E. & Scruton, C. 1965 An investigation of the aerodynamic stability of a model of the World Trade Center. (To be issued as an NPL Aero. Rep.).Google Scholar