Publisher : The Korean Society of Mechanical Engineers
DOI : 10.3795/KSME-B.2016.40.6.373
Title & Authors
Characteristics of Flowfield of a Circular Cylinder Having a Detached Splitter Plate with High Reynolds Number Ro, Ki Deok; Lee, Han Gyun; Lee, Jong Ho; Lee, Jeong Min; Shin, Jin Ho; Cheon, Kang Bin;
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.
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