Calculation of added resistance in waves for KVLCC2 and its modified hull form using RANS-based method

Abstract

The present study provides the numerical simulations with the unsteady Reynolds Averaged Navier-Stokes (URANS) methods for the prediction of added resistance performance of hull forms advancing forward in regular waves. Two degrees of freedom motion (pitch and heave) are solved in the non-inertial reference frame in which the effects of the motions are considered as a body force source term in the governing equations. The relative translational and rotational velocities according to the motions of the hull are imposed at all the far-field boundaries. The computation of the added resistance and 2DOF motions were carried out for KVLCC2 and its modified hull form in which bow shape is sharpened with removing the bow-bulb under thirteen different regular head-wave conditions. The computational results showed good agreement with the experiments and the modified hull form is superior to the original KVLCC2 in added resistance performances.om motion (pitch and heave) are solved in the non-inertial reference frame in which the effects of the motions are considered as a body force source term in the governing equations. The relative translational and rotational velocities according to the motions of the hull are imposed at all the far-field boundaries. The computation of the added resistance and 2DOF motions were carried out for KVLCC2 and its modified hull form in which bow shape is sharpened with removing the bow-bulb under thirteen different regular head-wave conditions. The computational results showed good agreement with the experiments and the modified hull form is superior to the original KVLCC2 in added resistance performances.