Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

Large Eddy Simulations on the Configuration Design of Afterbodies for Drag Reduction

저항감소를 위한 물체후방의 형상설계에 관한 LES 해석

  • PARK JONC-CHUN (Department. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • KANG DAE-HWAN (Department. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • CHUN HO-HWAN (Department. of Naval Architecture and Ocean Engineering, Pusan National University)
  • 박종천 (부산대학교 조선해양공학과) ;
  • 강대환 (부산대학교 조선해양공학과) ;
  • 전호환 (부산대학교 조선해양공학과)
  • Published : 2003.10.01
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Abstract

When a body with slant angle behind its shoulder is moving at a high speed, the turbulent motion around the afterbody is generally associated with the flow separation, and determines the normal component of the drag. By changing the slant angle of the afterbody, the drag coefficients can be changed, drastically. Understanding and controlling the turbulent separated flows has significant importance for the design of optimal configuration of the moving bodies. In this paper, a new Large Eddy Simulation technique has been developed to investigate turbulent vortical motions around the afterbodies, using slant angle. By understanding the structure of the turbulent flow around the body, the new configuration of afterbodies is designed to reduce the drag of body, and the nonlinear effects, due to the interaction between the body configuration and the turbulent separated flows, are investigated by use of the developed LES technique.

Keywords

References

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