동력기계공학회지 (Journal of Power System Engineering)

  • 제17권6호
  • /
  • Pages.95-101
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  • 2013
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  • 2713-8429(pISSN)
  • /
  • 2713-8437(eISSN)
한국동력기계공학회 (The Korean Society for Power System Engineering)
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스테레오 시간분해 입자영상유속계를 이용한 외부경계층 수직날 배열에 의한 마찰저항 저감 기구에 관한 실험적 조사

Experimental Investigation on the Drag Reduction Mechanism of Outer-layer Vertical Blades Array using Stereoscopic Time-Resolved PIV

  • 이인원 (부산대학교 조선해양플랜트 글로벌핵심연구센터) ;
  • 박성현 (부산대학교 조선해양공학과 대학원) ;
  • 전호환 (부산대학교 조선해양플랜트 글로벌핵심연구센터) ;
  • 황아롬 (거제대학교 조선해양공학과) ;
  • 안남현 (거제대학교 조선해양공학과)
  • 투고 : 2013.08.28
  • 심사 : 2013.09.26
  • 발행 : 2013.12.31
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초록

A stereo PIV measurements in a circulating water channel has been performed to investigate the skin friction reduction mechanism of the outer-layer vertical blades first devised by Hutchins. In a recent PIV measurement study, considerable skin friction reduction was achieved as much as 2.73%~7.95% by outer-layer vertical blades array. In the present study, the influence of vertical blades array upon the characteristics of the turbulent coherent structures was analyzed by proper orthogonal decomposition method. It is observed that the vortical structures are cut and deformed by blades array and also the turbulent intensity and the Reynolds stress were weakened by the blades. These phenomena strongly associate the skin-friction drag reduction mechanism in the turbulent boundary layer flow.

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참고문헌

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