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Experiments on vortex shedding from flat plates with square leading and trailing edges

Published online by Cambridge University Press:  26 April 2006

Yasuharu Nakamura ,
Yuji Ohya  and
Hideki Tsuruta
Yasuharu Nakamura
Affiliation:
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816, Japan
Yuji Ohya
Affiliation:
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816, Japan
Hideki Tsuruta
Affiliation:
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816, Japan
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Abstract

Vortex shedding from flat plates with square leading and trailing edges having chord-to-thickness ratios 3–16 at Reynolds numbers (1–3) × 103 is investigated experimentally in low-speed wind tunnels. It is shown that vortex shedding from flat plates with square leading and trailing edges is characterized by the impinging-shear-layer instability where the separated shear layer becomes unstable in the presence of a sharp trailing edge corner. The Strouhal number which is based on the plate's chord is approximately constant and equal to 0.6 for chord-to-thickness ratios 3–5. With further increase in the ratio it increases stepwise to values that are approximately equal to integral multiples of 0.6.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 222 , January 1991 , pp. 437 - 447
Copyright
© 1991 Cambridge University Press

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References

Cherry, N. J., Hillier, R. & Latour, M. E. M. P. 1983 The unsteady structure of two-dimensional separated and reattaching flows. J. Wind Engng Indust. Aero. 11, 95–105.Google Scholar
Cherry, N. J., Hillier, R. & Latour, M. E. M. P. 1984 Unsteady measurements in a separated and reattaching flow. J. Fluid Mech. 144, 13–46.Google Scholar
Nakamura, Y. & Hirata, K., 1989 Critical geometry of oscillating bluff bodies. J. Fluid Mech. 208, 375–393.Google Scholar
Nakamura, Y. & Nakashima, M., 1986 Vortex excitation of prisms with elongated rectangular, H and 1– cross-sections. J. Fluid Mech. 163, 149–169.Google Scholar
Okajima, A., Mizota, T. & Tanida, Y., 1983 Observation of flows around rectangular cylinders. Proc. 3rd Intl Symp. on Flow Visualization, Michigan, University of Michigan, pp. 193–199.Google Scholar
Parker, R. & Welsh, M. C., 1983 Effects of sound on flow separation from blunt flat plates. Intl J. Heat and Fluid Flow 4, 113–127.Google Scholar
Rockwell, D. & Naudascher, E., 1978 Review-Self-sustaining of flow past cavities. Trans. ASME I: J. Fluids Engng 100, 152–165.Google Scholar
Stokes, A. N. & Welsh, M. C., 1986 Flow-resonant sound interaction in a duct containing a plate, II: Square leading edge. J. Sound Vib. 104, 55–73.Google Scholar
Taneda, S.: 1981 Amplification of artificial disturbances in turbulent boundary layers. J. Phys. Soc. Japan 50, 2447–2449.Google Scholar
Taneda, S.: 1983 The main structure of turbulent boundary layers. J. Phys. Soc. Japan 52, 4138–4144.Google Scholar
Tomonari, Y.: 1988 Aeroelastic galloping of a square-section cylinder in the Reynolds number range from 103 to 104. Trans. Japan Soc. Aero. Space Sci. 30, 234–242.Google Scholar