Pressure distribution, fluctuating forces and vortex shedding behavior of circular cylinder with rotatable splitter plates

2012 ◽  
Vol 28 ◽  
pp. 263-278 ◽  
Author(s):  
F. Gu ◽  
J.S. Wang ◽  
X.Q. Qiao ◽  
Z. Huang
Keyword(s):  
Circular Cylinder ◽  
Pressure Distribution ◽  
Vortex Shedding ◽  
Splitter Plates

The effects of wake splitter plates on the flow past a circular cylinder in the range 104

1973 ◽  
Vol 61 (1) ◽  
pp. 187-198 ◽  
Author(s):  
C. J. Apelt ◽  
G. S. West ◽  
Albin A. Szewczyk
Keyword(s):  
Circular Cylinder ◽  
Strouhal Number ◽  
Vortex Shedding ◽  
Measurement Techniques ◽  
Base Pressure ◽  
Visualization Technique ◽  
Pressure Distributions ◽  
Splitter Plates ◽  
Flow Past ◽  
Careful Measurement

Experiments were carried out using models having L/D [les ] 2 and the resulting pressure distributions and vortex shedding characteristics are presented. A simple visualization technique which provides explanations of some of the measured results is described. It is concluded that splitter planes reduce the drag markedly by stabilizing the separation points and produce a wake narrower than that for a plain cylinder, raise the base pressure by as much as 50% and affect the Strouhal number to a lesser degree. Careful measurement techniques have enabled these effects to be presented accurately.

Pressure Distributions Around Circular Cylinders in Oscillating Flow

1980 ◽  
Vol 102 (2) ◽  
pp. 191-195 ◽  
Author(s):  
C. Dalton ◽  
B. Chantranuvatana
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Pressure Distribution ◽  
Vortex Shedding ◽  
Flow Reversal ◽  
Oscillatory Motion ◽  
Circular Cylinders ◽  
Oscillating Flow ◽  
Average Pressure ◽  
Pressure Distributions

Oscillatory motion of a circular cylinder is studied from the viewpoint of the average pressure distribution on the cylinder. Effects of Reynolds number up to 40,000, period, and Keulegan and Carpenter number on the pressure distribution are examined. Results are explained in terms of vortex shedding and its relationship to period and Keulegan-Carpenter number. The effects of flow reversal, sweeping wake vortices back over the cylinder, are discussed.

On the Suppression of Vortex Shedding From Circular Cylinders Using Detached Short Splitter-Plates

2010 ◽  
Vol 132 (4) ◽  
Author(s):  
Behzad Ghadiri Dehkordi ◽  
Hamed Houri Jafari
Keyword(s):  
Circular Cylinder ◽  
Vortex Shedding ◽  
Splitter Plate ◽  
Circular Cylinders ◽  
Staggered Grid ◽  
Drag Forces ◽  
Splitter Plates ◽  
Parallel Arrangement ◽  
Lift And Drag ◽  
Good Agreement

Flow over a circular cylinder with detached short splitter-plates is numerically simulated in order to assess the suppression of periodic vortex shedding. A finite-volume solver based on the Cartesian-staggered grid is implemented, and the ghost-cell method in conjunction with Great-Source-Term technique is employed in order to enforce directly the no-slip condition on the cylinder boundary. The accuracy of the solver is validated by simulation of the flow around a single circular cylinder. The results are in good agreement with the experimental data reported in the literature. Finally, the flows over a circular cylinder with splitter-plate in its downstream (off and on the centerline) are computed in Re=40 as a nonvortex shedding case and in Re=100 and 150 as cases with vortex shedding effects. The same simulations are also performed for the case where dual splitter-plates are in a parallel arrangement embedded in the downstream of the cylinder. The optimum location of the splitter-plate to achieve maximum reduction in the lift and drag forces is determined.

Control of flow-induced noise behind a circular cylinder using splitter plates

AIAA Journal ◽  
1998 ◽  
Vol 36 ◽  
pp. 1961-1967 ◽  
Author(s):  
Donghyun You ◽  
Haecheon Choi ◽  
Myung-Ryul Choi ◽  
Shin-Hyoung Kang
Keyword(s):  
Circular Cylinder ◽  
Splitter Plates ◽  
Flow Induced Noise ◽  
Control Of Flow

scholarly journals Vortex Shedding from a Circular Cylinder with Spiral Fin

2008 ◽  
Vol 3 (6) ◽  
pp. 787-795 ◽  
Author(s):  
Hiromitsu HAMAKAWA ◽  
Keisuke NAKASHIMA ◽  
Tomohiro KUDO ◽  
Eiichi NISHIDA ◽  
Tohru FUKANO
Keyword(s):  
Circular Cylinder ◽  
Vortex Shedding

Vortex shedding from a circular cylinder in moderate-Reynolds-number shear flow

1980 ◽  
Vol 101 (4) ◽  
pp. 721-735 ◽  
Author(s):  
Masaru Kiya ◽  
Hisataka Tamura ◽  
Mikio Arie
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Shear Flow ◽  
Vortex Shedding ◽  
Transverse Velocity ◽  
Number Range ◽  
Uniform Shear ◽  
Reynolds Number Range ◽  
Moderate Reynolds Number ◽  
Shear Parameter

The frequency of vortex shedding from a circular cylinder in a uniform shear flow and the flow patterns around it were experimentally investigated. The Reynolds number Re, which was defined in terms of the cylinder diameter and the approaching velocity at its centre, ranged from 35 to 1500. The shear parameter, which is the transverse velocity gradient of the shear flow non-dimensionalized by the above two quantities, was varied from 0 to 0·25. The critical Reynolds number beyond which vortex shedding from the cylinder occurred was found to be higher than that for a uniform stream and increased approximately linearly with increasing shear parameter when it was larger than about 0·06. In the Reynolds-number range 43 < Re < 220, the vortex shedding disappeared for sufficiently large shear parameters. Moreover, in the Reynolds-number range 100 < Re < 1000, the Strouhal number increased as the shear parameter increased beyond about 0·1.

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