Abstract No.F180124-119

Author name(s): Tien Thua Nguyen, Van Minh Nguyen, Hyeon Kyu Yoon

Company: Changwon National University, Korea

Nowadays, ship size increases as available to run in canal or to be berth at the port as possible in order to get high efficiency of business. However ship maneuverability decreases according to its size. Low quality of ship maneuverability is not important in the open sea compared to the congested waterways near port where the water depth is conventionally shallow. Therefore, ship maneuverability in shallow water should be checked during design stage and the captain should bear in mind about it for safe navigation. For this reason, IMO(International Maritime Organization) recommends that the maneuverability of a ship in shallow water should be included in the maneuvering booklet(IMO Resolution A.601, 1987). Many works have been done to evaluate the effect of water depth on hydrodynamic force acting on ship hull, on the while the rudder force and hull force due to rudder in shallow water have not been researched so much. In this paper, static drift test and circular motion test of a scaled KCS are performed in the square tank in Changwon National University. In order to perform the test in shallow water, tank bottom was precisely grinded within ? 1 mm level. In addition, CFD technique is used to simulate the same test conditions to clarify the characteristics of flow pattern near ship hull to assist to design a ship.

KEY WORDS: ship maneuvering; shallow water effect; static drift test; circular motion test; CFD simulation

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