KVLCC2 선형의 천수영역에서의 자세 변화에 대한연구
Study of Ship Squat for KVLCC2 in Shallow Water
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참고문헌
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초록
Ship squat is a well known phenomenon, which means an additional sinkage and a change of trim when a ship sails in shallow water. As a series of ship squat study, a HPMM(Horizontal Planar Motion Mechanism) test of KVLCC2 model ship to measure a sinkage and atrim in shallow water was conducted. Additionally a CFD(Computational Fluid Dynamics) analysis was carried out to simulate fluid flowsaround the ship surface. A change in ship speed, drift angle at three depth conditions(H/T = 1.2, 1.5 & 2.0) is considered for comparingthese results. As a result, an increase of the ship speed and the drift angle caused an increase in ship squat in EFD(Experimental FluidDynamics), and created a lower pressure on the ship bottom area in CFD. Lastly the sinkage results of KVLCC2 by EFD and CFD arecompared to results by three empirical formulas. The tendency of sinkage by EFD and CFD is similar to the results of empiricalformulas.
Abstract
Ship squat is a well known phenomenon, which means an additional sinkage and a change of trim when a ship sails in shallow water. As a series of ship squat study, a HPMM(Horizontal Planar Motion Mechanism) test of KVLCC2 model ship to measure a sinkage and atrim in shallow water was conducted. Additionally a CFD(Computational Fluid Dynamics) analysis was carried out to simulate fluid flowsaround the ship surface. A change in ship speed, drift angle at three depth conditions(H/T = 1.2, 1.5 & 2.0) is considered for comparingthese results. As a result, an increase of the ship speed and the drift angle caused an increase in ship squat in EFD(Experimental FluidDynamics), and created a lower pressure on the ship bottom area in CFD. Lastly the sinkage results of KVLCC2 by EFD and CFD arecompared to results by three empirical formulas. The tendency of sinkage by EFD and CFD is similar to the results of empiricalformulas.
참고문헌 (5)
- Beaulieu, C., "Statistical Approach to Model the Deep Draft Ships' Squat in the St. Lawrence Waterway", Journal of Waterway, Port, Costal, and Ocean Engineering, 135(3), pp.80~90 (2009)
- Hewlett, C., "Dynamic squat and under-keel clearance of ships in confined channels", 30th PIANC-AIPCN Congress (2002)
- Kim, H.E, "An Experimental Study of the Shallow Water Effect on Series60 Hull Form", Journal of the Society of Naval Architects of Korea, 37(3), pp.21~26 (2000)
- 신현경, "전산유체역학을 이용한 제한수로에서의 선박 침하 해석", 대한조선학회 논문집, 48(4), pp.317~324 (2011), 대한조선학회
- 윤근항, "KCS선형의 천수영역에서의 자세 변화에 대한 실험적 연구", 대한조선학회 논문집, 51(1), pp.34~41 (2014), 대한조선학회