PIV Investigation on the Skin Friction Reduction Mechanism of Outer-layer Vertical Blades

경계층 외부 수직날의 마찰저항 저감 기구에 대한 PIV 관측

  • 박현 (부산대학교 첨단조선공학연구센터) ;
  • 안남현 (거제대학 조선과) ;
  • 박성현 (부산대학교 조선해양공학과 대학원) ;
  • 전호환 (부산대학교 첨단조선공학연구센터) ;
  • 이인원 (부산대학교 첨단조선공학연구센터)
  • Received : 2010.10.11
  • Accepted : 2010.12.02
  • Published : 2011.03.31


An experimental assessment has been made of the drag reducing efficiency of the outer-layer vertical blades, which were first devised by Hutchins. The drag reduction efficiency of the blades was reported to reach as much as 30%. However, the drag reduction efficiency was quantified only in terms of the reduction in the local skin-friction coefficient. In the present study, a series of drag force measurements in towing tank has been performed toward the assessments of the total drag reduction efficiency of the outer-layer vertical blades. A maximum 9.6% of reduction of total drag was achieved. The scale of blade geometry is found to be weakly correlated with outer variable of boundary layer. In addition, detailed flow field measurements have been performed using 2-D time resolved PIV with a view to enabling the identification of drag reduction mechanism.


Supported by : 부산대학교


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