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Research Papers: Techniques and Procedures

Control of Vortex Shedding of Circular Cylinder in Shallow Water Flow Using an Attached Splitter Plate

[+] Author and Article Information
Huseyin Akilli1

Department of Mechanical Engineering, Faculty of Engineering and Architecture, Cukurova University, Balcali, Adana 01330, Turkey

Cuma Karakus, Atakan Akar, Besir Sahin, N. Filiz Tumen

Department of Mechanical Engineering, Faculty of Engineering and Architecture, Cukurova University, Balcali, Adana 01330, Turkey

1

Corresponding Author.

J. Fluids Eng 130(4), 041401 (Apr 04, 2008) (11 pages) doi:10.1115/1.2903813 History: Received May 08, 2007; Revised November 16, 2007; Published April 04, 2008

In the present work, passive control of vortex shedding behind a circular cylinder by splitter plates of various lengths attached on the cylinder base is experimentally investigated in shallow water flow. Detailed measurements of instantaneous and time-averaged flow data of wake flow region at a Reynolds number of Re=6300 were obtained by particle image velocimetry technique. The length of the splitter plate was varied from LD=0.2 to LD=2.4 in order to see the effect of the splitter plate length on the flow characteristics. Instantaneous and time-averaged flow data clearly indicate that the length of the splitter plate has a substantial effect on the flow characteristics. The flow characteristics in the wake region of the circular cylinder sharply change up to the splitter plate length of LD=1.0. Above this plate length, small changes occur in the flow characteristics.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic of the experimental system

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Figure 2

(a) Time-averaged-velocity vector field, (b) corresponding streamline topology, and (c) contours of normalized Reynolds shear stress

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Figure 3

Comparison of instantaneous spanwise vorticity contours for different splitter plate cases

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Figure 4

Variation of saddle point location as a function of splitter plate length

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Figure 5

Variation of normalized peak streamwise root-mean-square velocity fluctuations as a function of splitter plate length

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Figure 6

Variation of Reynolds stress at various locations downstream of the cylinder

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Figure 7

Effect of splitter plate length on turbulent kinetic energy distribution downstream of the cylinder

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Figure 8

Normalized Reynolds normal stresses ⟨u′u′⟩∕U2 and ⟨v′v′⟩∕U2 for different splitter plate lengths

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Figure 9

Normalized Reynolds shear stress for different splitter plate lengths at the elevation adjacent to the bed surface

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