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http://dx.doi.org/10.3795/KSME-B.2015.39.9.751

Flowfield Experiments for a Circular Cylinder Having a Front Triangular Prism  

Ro, Ki Deok (Dept. of Mechanical System Engineering.Institute of Marine Engineering, Gyeongsang Nat'l Univ.)
Han, Sang Yun (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Ju, Hyung Gwan (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Kang, Ja Un (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Bae, Tae Beom (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Noh, Woo Kyun (Dept. of Mechanical System Engineering, Gyeongsang Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.9, 2015 , pp. 751-759 More about this Journal
Abstract
In this study, we investigate the Characteristics of the flowfields of a circular cylinder having a small triangular prism at the upstream side. We measure the fluid force on the circular cylinder and obtain a visualization of the flow fields using particle image velocimetry (PIV). The experimental parameters employed were the width ratios (H/B = 0.2~0.6) of the triangular prisms to the circular cylinder's diameter, and the gap ratios (G/B = 0~3) between the circular cylinder and the triangular prism. We observed that the drag reduction rate and Strouhal number of the circular cylinder increased and then decreased with G/B in the case of the same H/B. The drag reduction rate increased with H/B in the case of the same G/B. In the case where the circular cylinder had a small triangular prism, the stagnation regions were represented in the upstream and downstream sides of the circular cylinder.
Keywords
Drag Reduction; Circular Cylinder; PIV; Flow Control; Triangular Prism;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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