Abstract

Abstract: The Characteristics of the drag reduction of a square prism having a detached splitter plate at the wake side were investigated by measuring of lift and drag on the square prism. The experimental parameters 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. As the results the amplitude of the lift on the square prism havinga detached splitter plate was remarkably decreased by comparison with the prototypical square prism. The drag reduction rate of the square prism was increased with H/B in case of the same G/B, and was increased and decreased with G/B in case of the same H/B. The maximum drag reduction rate was represented by 24.2% at H/B=1.5 and G/B=0.5. Key words: Drag reduction, Separated flow, Unsteady flow, Square prism, Splitter plate †교신저자(경상대학교 기계시스템공학과․해양산업연구소, E-mail: rokid@gnu.ac.kr, Tel: 055-772-9103)1 경상대학교 기계시스템공학과, E-mail: yoon21y@naver.com, Tel: 010-3848-62262 경상대학교 기계시스템공학과, E-mail: bii206@nate.com, Tel: 010-9798-95353 경상대학교 기계시스템공학과, E-mail: coo1702@nate.com, Tel: 010-3705-94614 경상대학교 기계시스템공학과, E-mail: ocs1419@naver.com, Tel: 010-8423-4503

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