Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-26T20:42:36.674Z Has data issue: false hasContentIssue false
  • English
  • Français

Pressure Distributions and Forces on Rectangular and D-shaped Cylinders

Published online by Cambridge University Press:  07 June 2016

B R Bostock  and
W A Mair
B R Bostock
Affiliation:
Engineering Department, Cambridge University
W A Mair
Affiliation:
Engineering Department, Cambridge University
Get access

Summary

Measurements in two-dimensional flow on rectangular cylinders confirm earlier work of Nakaguchi et al in showing a maximum drag coefficient when the height h of the section (normal to the stream) is about 1.5 times the width d. Reattachment on the sides of the cylinder occurs only for h/d < 0.35.

For cylinders of D-shaped section (Fig 1) the pressure distribution on the curved surface and the drag are considerably affected by the state of the boundary layer at separation, as for a circular cylinder. The lift is positive when the separation is turbulent and negative when it is laminar. It is found that simple empirical expressions for base pressure or drag, based on known values for the constituent half-bodies, are in general not satisfactory.

Type
Research Article
Information
Aeronautical Quarterly , Volume 23 , Issue 1 , February 1972 , pp. 1 - 6
Copyright
Copyright © Royal Aeronautical Society. 1972

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. Maskell, E C A theory of the blockage effects of bluff bodies and stalled wings in a closed tunnel. ARC R & M 3400, 1965.Google Scholar
2. Nakaguchi, H Hashimoto, K Muto, S An experimental study on aerodynamic drag of rectangular cylinders. Journal of Japan Society for Aero and Space Sciences, Vol 16, No 168, 1968.Google Scholar
3. Vickery, B J Fluctuating lift and drag on a long cylinder of square cross-section in a smooth and in a turbulent stream. Journal of Fluid Mechanics, Vol 25, pp 481-494, 1966.CrossRefGoogle Scholar
4. Bearman, P W Trueman, D An investigation of the flow around rectangular cylinders. To be published in The Aeronautical Quarterly.Google Scholar
5. Roshko, A Experiments on the flow past a circular cylinder at very high Reynolds number. Journal of Fluid Mechanics, Vol 10, pp 345-356, 1961.Google Scholar
6. Bearman, P W Investigation of the flow behind a two-dimensional model with a blunt trailing edge and fitted with splitter plates. Journal of Fluid Mechanics, Vol 21, pp 241-255, 1965.Google Scholar
7. Fage, A Johansen, F C On the flow of air behind an inclined flat plate of infinite span. ARC R & M 1104, 1927.Google Scholar