Abstract No.C181018-274
Author name(s): Yi LIU1,2, Zaojian ZOU2,3, Sheming FAN1
Company: 1. Marine Design and Research Institute of China, China; 2. Shanghai Jiao Tong University, China; 3. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, China
Manoeuvrability is an important hydrodynamic performance of a ship, and should be taken into account during the ship design stage. The present study aims to offer a CFD (Computational Fluid Dynamics)-based numerical tool for manoeuvring prediction with high accuracy. The virtual CMT (circular motion tests) for a model scale KCS container ship are conducted by using unsteady Reynolds averaged Navier-Stokes (RANS) computation to obtain both the linear and nonlinear hydrodynamic derivatives in the MMG model of ship manoeuvring. Firstly, the verification and validation work is carried out for hydrodynamic forces in the virtual CMT to verify the numerical accuracy. Then the computed hydrodynamic derivatives are compared with those obtained from available CMT data, and a good agreement is obtained. By substituting the obtained hydrodynamic derivatives into the MMG model, the standard turning and zigzag manoeuvres are predicted. In comparison with the available free running test data and the prediction results by others, it is demonstrated that acceptable prediction accuracy can be achieved with the present method, which shows the effectiveness of the present method in predicting ship manoeuvrability.
KEY WORDS: manoeuvrability prediction; MMG model; CMT; hydrodynamic derivatives; RANS; verification and validation; free running test
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