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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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