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Strouhal numbers of rectangular cylinders

Published online by Cambridge University Press:  20 April 2006

Atsushi Okajima
Atsushi Okajima
Affiliation:
Research Institute for Applied Mechanics, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812, Japan
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Abstract

Experiments on the vortex-shedding frequencies of various rectangular cylinders were conducted in a wind tunnel and in a water tank. The results show how Strouhal number varies with a width-to-height ratio of the cylinders in the range of Reynolds number between 70 and 2 × l04. There is found to exist a certain range of Reynolds number for the cylinders with the width-to-height ratios of 2 and 3 where flow pattern abruptly changes with a sudden discontinuity in Strouhal number. The changes in flow pattern corresponding to the discontinuity of Strouhal number have been confirmed by means of measurements of velocity distribution and flow visualization. These data are compared with those of other investigators. The experimental results have been found to show a good agreement with those of numerical calculations.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 123 , October 1982 , pp. 379 - 398
Copyright
© 1982 Cambridge University Press

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References

Bearman, P. W. & Trueman, D. M. 1972 An investigation of the flow around rectangular cylinders. Aero. Q. 23, 229–237.Google Scholar
Bostock, B. R. & Mair, W. A. 1972 Pressure distributions and forces on rectangular and D-shaped cylinders. Aero. Q. 23, 1–6.Google Scholar
Daiguji, H. & Kobayashi, S. 1981 Numerical solution for the time-dependent two-dimensional viscous flows past obstacle. 2nd report: A stationary obstacle in a uniform flow. Trans. Japan Soc. Mech. Engrs B 47, 9–15 (in Japanese).Google Scholar
Lee, B. E. 1975 The effect of turbulence on the surface pressure field of a square prism. J. Fluid Mech. 69, 263–282.Google Scholar
Mizota, T. & Okajima, A. 1981a Experimental studies of mean flow around rectangular prisms. Proc. Japan Soc. Civ. Engrs 312, 39–47 (in Japanese).Google Scholar
Mizota, T. & Okajima, A. 1981b Experimental studies of unsteady flow around rectangular prisms. Proc. Japan Soc. Civil Engrs 312, 49–57 (in Japanese).Google Scholar
Nakaguchi, H., Hashimoto, K. & Muto, S. 1968 An experimental study of aerodynamic drag of rectangular cylinders. J. Japan Soc. Aero. Space Sci. 16, 1–5 (in Japanese).Google Scholar
Nakamura, Y & Mizota, T. 1975 Unsteady lifts and wakes of oscillating rectangular prisms. Proc. A.S.C.E.: J. Engng Mech. Div. 101 (EM6), 855–871.Google Scholar
Novak, M. 1972 Galloping oscillations of prismatic structures. Proc. A.S.C.E.: J. Engng Mech. Div. 98 (EM1), 27–45.Google Scholar
Okajima, A. & Sugitani, K. 1979 Flows around rectangular cylinders. Numerical calculations and experiments, part 2. Bull Res. Inst. Appl. Mech., Kyushu Univ. 50, 67–80 (in Japanese).Google Scholar
Otsuki, Y., Washizu, K., Tomizawa, H. & Oya, A. 1974 A note on the aeroelastic instability of a prismatic bar with square section. J. Sound Vib. 34, 233–248.Google Scholar
Parkinson, G. V. & Brooks, N. P. H. 1961 On the aeroelastic instability of bluff cylinders. Trans. A.S.M.E. E: J. Appl. Mech. 28, 252–258.Google Scholar
Roshko, A. 1954 On the drag and shedding frequency of two-dimensional bluff bodies. NACA Tech. Note no. 3169.Google Scholar
Scruton, C. 1963 The wind-excited oscillations of stacks, towers and masts. In Proc. N.P.L. Symp. no. 16, Wind effects on buildings and structures. H.M.S.O. (London) paper no. 16, pp. 798–836.
Vickery, B. J. 1966 Fluctuating lift and drag on a long cylinder of square cross-section in a smooth and in a turbulent stream. J. Fluid Mech. 25, 481–494.Google Scholar