Browse > Article
http://dx.doi.org/10.3795/KSME-B.2016.40.6.373

Characteristics of Flowfield of a Circular Cylinder Having a Detached Splitter Plate with High Reynolds Number  

Ro, Ki Deok (Dept. of Mechanical System Engineering & Institute of Marine Engineering, Gyeongsang Nat'l Univ.)
Lee, Han Gyun (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Lee, Jong Ho (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Lee, Jeong Min (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Shin, Jin Ho (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Cheon, Kang Bin (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.40, no.6, 2016 , pp. 373-381 More about this Journal
Abstract
In this study, we investigate the characteristics of the drag reduction of a circular cylinder having a detached splitter plate at the wake side. We measure the fluid force on a circular cylinder and visualize the field using particle image velocimetry (PIV) with a high Reynolds number, Re = 10,000. The experimental paraeters used were the width ratios (H/B = 0.5~1.5) of splitters to the prism width and the gap ratios (G/B = 0~2) between the prism and the splitter plate. The drag-reduction rate of the circular cylinder increased with H/B in the case of the same G/B, and it increased and then decreased with G/B in the case of the same H/B. The vortices of the opposite direction on the upper and lower sides of the detached splitter plate were generated by installing the plate. Reverse flow was caused by the vortices at the wake region of the circular cylinder, and the drag of the circular cylinder was decreased by the reverse flow.
Keywords
Drag Reduction; PIV; Separated Flow; Unsteady Flow; Circular Cylinder; Splitter Plate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Gad-el-Hak, M., 1996, "Modern Developments in Flow Control," Applied Mechanics Reviews, Vol. 49, No.7, pp. 365-379   DOI
2 Achenbach, E., 1971, "Influence of Surface Roughness on the Cross-Flow Around a Circular Cylinder," Journal of Fluid Mechanics, Vol. 46, No. 2, pp. 321-335.   DOI
3 Guven, O., Farell, C. and Patel, V. C., 1980, "Surface Roughness Effects on the Mean Flow past Circular Cylinders," Journal of Fluid Mechanics, Vol. 98, No. 4, pp. 673-701.   DOI
4 Lim, H. C. and Lee, S. J., 2001, "An Experimental Study on Drag Reduction of Grooved Cylinders," Trans. Korean Soc. Mech. Eng. B, Vol. 25, No. 2, pp. 260-268.   DOI
5 Aoki, K., Lee, S. and Oki, M., 1998, "Drag and Flow Characteristics Around the Circular Cylinder with Grooves." Trans(B). of the Japan Society of Mechanical Engineers, Vol. 64, No. 617, pp. 18-24.   DOI
6 Ro, K. D., 2001, "Drag Reduction of Cylinder with Dimpled Surface," Journal of the Korean Society of Marine Engineers, Vol. 25, No. 1, pp. 155-161.
7 Ro, K. D. and Park, J. T., 2002, "Drag Reduction Characteristics of Cylinder Having Square Dimpled Surface," Journal of the Korean Society of Marine Engineers, Vol. 26, No. 3, pp. 233-239.
8 Anderson, E. A. and Szewczyk, A. A., 1997, "Effects of a Splitter Plate on the Near Wake of a Circular Cylinder in 2 and 3-dimensional Flow Configurations," Experiments in Fluids, Vol. 23, pp. 161-174.   DOI
9 Wu, J., Shu, C. and Zhao, N., 2014, "Investigation of Flow Characteristics Around a Stationary Circular Cylinder with an Undulatory Plate," European Journal of Mechanics B/Fluids Vol. 48, pp. 27-39.   DOI
10 Sun, S. H., Hwang, J. Y. and Yang, K. S., 2001, "Drag Reduction on a Circular Cylinder using a Detached Splitter Plate," Trans. Korean Soc. Mech. Eng. B, Vol. 25, No. 11, pp. 1632-1639.   DOI