RANS Prediction of Wave-Induced Ship Motions, and Steady Wave Forces and Moments in Regular Waves

Author:

Gao Qingze,Song LifeiORCID,Yao Jianxi

Abstract

The wave-induced motions, and steady wave forces and moments for the oil tanker KVLCC2 in regular head and oblique waves are numerically predicted by using the expanded RANS solver based on OpenFOAM. New modules of wave boundary condition are programed into OpenFOAM for this purpose. In the present consideration, the steady wave forces and moments include not only the contribution of hydrodynamic effects but also the contribution of the inertial effects due to wave-induced ship motions. The computed results show that the contribution of the inertial effects due to heave and pitch in head waves is non-negligible when wave-induced motions are of large amplitude, for example, in long waves. The influence of wave amplitude on added resistance in head waves is also analyzed. The dimensionless added resistance becomes smaller with the increasing wave amplitude, indicating that added resistance is not proportional to the square of wave amplitude. However, wave amplitude seems not to affect the heave and pitch RAOs significantly. The steady wave surge force, sway force and yaw moment for the KVLCC2 with zero speed in oblique waves are computed as well. The present RANS results are compared with available experimental data, and very good agreements are found between them.

Funder

National Natural Science Foundation of China

Publisher

MDPI AG

Subject

Ocean Engineering,Water Science and Technology,Civil and Structural Engineering

Reference33 articles.

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2. Interim Guidelines for Determining Minimum Propulsion Power to Maintain the Maneuverability in Adverse Conditions,2013

3. CFD verification and validation of added resistance and motions of KVLCC2 with fixed and free surge in short and long head waves

4. Experimental investigation on the added resistance of modified KVLCC2 hull forms with different bow shapes

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