한국마린엔지니어링학회:학술대회논문집 (Proceedings of the Korean Society of Marine Engineers Conference)

한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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Drag Reduction Characteristics of Cylinder Having Square Dimpled Surface

  • 노기덕 (경상대학교 수송기계공학부, 해양산업연구소) ;
  • 박지태 (경상대학교 대학원) ;
  • 진윤식 (경상대학교 기관공학과) ;
  • 여광수 (경상대학교 기관공학과)
  • 발행 : 2001.05.01
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초록

The drag reduction of the cylinder having square dimpled surface was studied by the measuring the drag force acting on the cylinder. The level of the drag reduction was changed by the arrangement shape of the square grooves and Reynolds number. The drag of the cylinder was reduced about 28% with proper arrangement of square grooves. The flow field around the cylinder having grooves at the minimum drag was visualized by using post color ink in order to see the influence of the grooves. In this case, the separation points were sifted rearward and the wake region was smaller than that of the smooth cylinder.

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