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논문 상세정보

자유항주모형시험을 이용한 KVLCC2 선형의 천수영역에서의 조종성능에 관한 연구

A Study on the Manoeuvrability of KVLCC2 in Shallow Water by Free Running Model Test

Abstract

It has been reported that a ship sailing in shallow water possesses better straight-line stability due to the change of fluid flow around the ship. This tendency affects manoeuvring characteristics of the ship. To investigate this phenomenon, indoor free running model test(FRMT) on KVLCC2 was carried out in three water depth conditions(H/T = 1.2, 1.5 & 2.0). Turning circle tests(± 35° ) and zigzag tests(± 20° /5° and ± 20° /10° ) were conducted with newly developed indoor FRMT system, and the manoeuvring results were compared with test results from other institutes. As the water depth decreased, the yaw rate of the ship decreased, and the distances of circular trajectories at the same heading angle increased in the turning circle tests. The first overshoot angles of the zigzag tests decreased. From both tests, the time for course change increased as the water depth decreased. These manoeuvring characteristics show that KVLCC2 in shallow water becomes more stable in terms of straight-line stability.

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참고문헌 (6)

  1. 1. Beaulieu, C. Gharbi, S. Ouarda, T.B.M.J. & Seidou, O., 2009. 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. 
  2. 2. Béguin, L. Guillerm, P.E. Rousset, J.M. Weber, M. Lambert, S. Toularastel, J.L. & Davoust, L., 2013. An experimental investigation of behavior and hydrodynamic forces acting on a ship in shallow water. Proceedings of the 3rd International Conference on Ship Manoeuvring (MASHCON) in Shallow and Confined Water, Ghent, Belgium, 3-5 June 2013, pp.199-207. 
  3. 3. Kim, S.W. Yeo, D.J. Rhee, K.P. & Kim, D.J., 2008. Prediction of Manoeuvrability of a Ship with Low Forward Speed in Shallow Water. Journal of the Society of Naval Architects of Korea, 45(3), pp.280-287. 
  4. 4. Society of Naval Architects and Marine Engineers (SNAME), 1989. Principles of naval architecture(III). 2nd Ed. New Jersey: SNAME. 
  5. 5. Tonelli, R., 2014. Experimental fluid dynamics - free running model tests. Paper presented at the Workshop on Verification and Validation of Ship Manoeuvring Simulation Methods (SIMMAN) 2014, Copenhagen, Denmark, 8-10 December 2014. 
  6. 6. Yun, K. Yeo, D.J. Ryu, G. & Lee, Y.J., 2015. Experimental study on manoeuvrability of KVLCC2 in shallow water by free running model test. Proceedings of the International Conference on Ship Manoeuvrability and Maritime Simulation (MARSIM) 2015, Newcastle, UK, 8-11 September 2015. 

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