Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Visualization of Unstable Vortical Structure in a Propeller Wake Affected by Simulated Hull Wake

재현된 반류의 영향을 받는 프로펠러 후류 내 불안정한 날개끝 보오텍스 구조에 대한 정량적 가시화

  • Kim, Kyung-Youl (Maritime & Ocean Engineering Research Institute, KORDI) ;
  • Paik, Bu-Geun (Maritime & Ocean Engineering Research Institute, KORDI) ;
  • Ahn, Jong-Woo (Maritime & Ocean Engineering Research Institute, KORDI)
  • 김경열 (한국해양연구원 해양시스템안전연구소) ;
  • 백부근 (한국해양연구원 해양시스템안전연구소) ;
  • 안종우 (한국해양연구원 해양시스템안전연구소)
  • Published : 2008.12.31
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Abstract

The characteristics of complicated propeller wake influenced by hull wake are investigated by using a two-frame PIV (Particle Image Velocimetry) technique. As the propeller is significantly affected by the hull wake in a real marine vessel, the measurements of propeller wake under the hull wake would be certainly necessary for more reliable validation and the prediction of numerical simulation with wake modeling. Velocity field measurements have been conducted in a medium-size cavitation tunnel with a hull wake. Generally, the hull wake generated by the boundary layer of ship's hull produces the different loading distribution on the propeller blade in both upper and lower propeller planes. The difference of the propeller wake behaviors caused by the hull wake is discussed in terms of axial velocity, vorticity and turbulence kinetic energy distribution in the present study.

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References

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