KVLCC2 선형의 천수영역에서의 자세 변화에 대한연구

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.