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

The Society of Naval Architects of Korea (대한조선학회)
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Computational Study of the Scale Effect on Resistance and Propulsion Performance of VLCC

대형 유조선의 저항 및 추진성능에 대한 축척효과의 수치적 연구

  • Choi, Jung-Eun (Maritime Research Institute, Hyundai Heavy Industries, Co. Ltd) ;
  • Kim, Jung-Hun (Maritime Research Institute, Hyundai Heavy Industries, Co. Ltd) ;
  • Lee, Hong-Gi (School of Naval Architecture and Ocean Engineering, University of Ulsan)
  • 최정은 (현대중공업(주) 선박해양연구소) ;
  • 김정훈 (현대중공업(주) 선박해양연구소) ;
  • 이홍기 (울산대학교 조선해양공학부)
  • Received : 2010.02.03
  • Accepted : 2011.03.25
  • Published : 2011.06.20
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Abstract

This article examines the scale effect of the flow characteristics, resistance and propulsion performance on a 317k VLCC. The turbulent flows around a ship in both towing and self-propulsion conditions are analyzed by solving the Reynolds-averaged Navier-Stokes equation together with the application of Reynolds stress turbulence model. The computations are carried out in both model- and full-scale. A double-body model is applied for the treatment of free surface. An asymmetric body-force propeller is used. The speed performances including resistance and propulsion factors are obtained from two kinds of methods. One is to analyze the computational results in model scale through the revised ITTC' 78 method. The other is directly to analyze the computational results in full scale. Based on the computational predictions, scale effects of the resistance and the self-propulsion factors including form factor, thrust deduction fraction, effective wake fraction and various efficiencies are investigated. Scale effects of the streamline pattern, hull pressure and local flow characteristics including x-constant sections, propeller and center plane, and transom region are also investigated. This study presents a useful tool to hull-form and propeller designers, and towing-tank experimenters to take the scale effect into consideration.

Keywords

References

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