Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-05T07:50:51.767Z Has data issue: false hasContentIssue false
  • English
  • Français

Part I: Chordwise Distribution of Fluctuating Pressure

Published online by Cambridge University Press:  07 June 2016

R.H. Wilkinson
R.H. Wilkinson*
Affiliation:
Institute of Oceanographic Sciences, Crossway, Taunton, Somerset
Get access

Summary

The fluctuating loading on a cylindrical bluff body due to vortex shedding increases if the body is capable of vibration. This is a result of amplification of the fluctuating pressures around a two-dimensional section of the body together with an improvement of the spanwise correlation of the vortex shedding. Measurement of the fluctuating forces on the cylinder during this process gives no guide as to the relative magnitude of these effects. In this paper, root mean square fluctuating pressure distributions and pressure correlations across a chord are presented for a square cylinder with front face normal to the approach flow whilst stationary and during forced vibration. The fluctuating lift coefficient for a two-dimensional section of the cylinder and its maximum amplification during vibration are calculated.

Type
Fluctuating Pressures on an Oscillating Square Prism
Information
Aeronautical Quarterly , Volume 32 , Issue 2 , May 1981 , pp. 97 - 110
Copyright
Copyright © Royal Aeronautical Society. 1981

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Chaplin, J.R. Flow-induced forces and wake dynamics of cylindrical bodies. Ph.D. thesis, Dept. Civ. Eng. Univ., of Bristol, 1970.Google Scholar
2 Wilkinson, R.H. Spanwise correlation and loading on an oscillating square prism. Submitted for publication.Google Scholar
3 Iberall, A.S. Attenuation of oscillatory pressures in instrument lines. Journal of National Bureau of Standards, Vol. 43, 1950.Google Scholar
4 Wilkinson, R.H. On the vortex induced loading on long bluff cylinders. Ph.D. thesis, Dept. of Civ. Eng. Univ., of Bristol, 1974.Google Scholar
5 Vickery, B.J. Fluctuating lift and drag on a long cylinder of square cross section in a smooth and turbulent stream. Journal of Fluid Mechanics, Vol. 25 Pt 3, p 481, 1966.CrossRefGoogle Scholar
6 Lee, B.E. The effect of turbulence on the surface pressure field of a square prism. Journal of Fluid Mechanics, Vol. 69, Pt 2, p 263, 1975.Google Scholar
7 Protos, A., Goldschmidt, V.W. and Toebes, G.H. Hydroelastic forces on bluff cylinders. Symposium on Unsteady Flow. ASME Paper 68-FE-12, 1968.Google Scholar
8 Ferguson, N., and Parkinson, G.V. Surface and wake flow phenomena of the vortex excited oscillation of a circular cylinder. Trans. A.S.M.E. Series B. Vol. 89, p 831, 1967.Google Scholar
9 Bearman, P.W. and Currie, I.G. Pressure-fluctuation measurements on an oscillating circular cylinder. Journal of Fluid Mechanics, Vol. 91, Pt 4, p 661.Google Scholar