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

The Society of Naval Architects of Korea (대한조선학회)
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Experimental Study of Ship Squat for KCS in Shallow Water

KCS선형의 천수영역에서의 자세 변화에 대한 실험적 연구

  • Yun, Kunhang (Korea Research Institute of Ships & Ocean Engineering) ;
  • Park, Byoungjae (Korea Research Institute of Ships & Ocean Engineering) ;
  • Yeo, Dong-Jin (Korea Research Institute of Ships & Ocean Engineering)
  • 윤근항 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박병재 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 여동진 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2013.08.19
  • Accepted : 2014.01.02
  • Published : 2014.02.20
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Abstract

When a ship sails in shallow water, it is well known that an additional sinkage and trim of the ship(squat) is caused by change of hydrodynamic force between the seabed and the bottom of a ship. In this paper, to examine this phenomenon by model tests, the squat of KCS model ship at a low speed is measured by the vision based ship motion measurement system during HPMM tests. Various combinations of a ship speed, a rudder angle and a drift angle were tested at three depth conditions(H/T = 1.2, 1.5 & 2.0). As a result, increase of the ship's speed and ship's drift angle caused an increase in ship squat, but the ship's rudder angle did not. The rate of increase in ship squat was the most at H/T = 1.2 condition. Lastly these experimental results are compared to the results by three empirical formulas and two CFD methods. The tendency of ship squat measured by experiment is similar to those of empirical formulas.

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References

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Cited by

  1. Study of Ship Squat for KVLCC2 in Shallow Water vol.51, pp.6, 2014, https://doi.org/10.3744/SNAK.2014.51.6.539
  2. NUMERICAL ANALYSIS OF THE FLOW AROUND THE HULL AND THE PROPELLER OF A SHIP ADVANCING IN SHALLOW WATER vol.20, pp.4, 2015, https://doi.org/10.6112/kscfe.2015.20.4.093