Suppression of fluid forces acting on a square prism by passive control of the approaching flow was investigated in the present study. Flow was controlled using a small flat plate upstream of the prism. The position of the flat plate was varied within the range of S/W = 0 ~ 3.0 (S: distance between the flat plate and square prism, W: width of square prism) and the width h of the flat plate ranged from 2 mm to 8 mm (h/W = 0.05 ~ 0.19). Steady and unsteady fluid forces, vortex shedding frequency, and flow pattern were systematically investigated. The maximum reduction of time-averaged drag was 75 percent, and the maximum reduction in fluctuating lift and drag was 95 and 80 percent, respectively, using a flat plate 1/10 of the size of the square prism.
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September 1997
Research Papers
Suppression of Fluid Forces Acting on a Square Prism by Passive Control
H. Sakamoto,
H. Sakamoto
Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, 090, Japan
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K. Tan,
K. Tan
Department of Mechanical Engineering, Kushiro National College of Technology, Kushiro, 084, Japan
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N. Takeuchi,
N. Takeuchi
Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, 090, Japan
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H. Haniu
H. Haniu
Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, 090, Japan
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H. Sakamoto
Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, 090, Japan
K. Tan
Department of Mechanical Engineering, Kushiro National College of Technology, Kushiro, 084, Japan
N. Takeuchi
Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, 090, Japan
H. Haniu
Department of Mechanical Engineering, Kitami Institute of Technology, Kitami, 090, Japan
J. Fluids Eng. Sep 1997, 119(3): 506-511 (6 pages)
Published Online: September 1, 1997
Article history
Received:
February 13, 1996
Revised:
February 11, 1997
Online:
December 4, 2007
Citation
Sakamoto, H., Tan, K., Takeuchi, N., and Haniu, H. (September 1, 1997). "Suppression of Fluid Forces Acting on a Square Prism by Passive Control." ASME. J. Fluids Eng. September 1997; 119(3): 506–511. https://doi.org/10.1115/1.2819273
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