Calculation of Added Resistance of a Ship in Waves by Rankine Source Method

Abstract

The author had developed Rankine Soure Method for unsteady free surface flows in a recent paper. This method is applied for the calculation of added resistance of a ship in this paper. In order to confirm the validity of Rankine Source Method for the calculation of added resistance of a ship, influences of the artifice due to Rayleigh and the panelling of the free surface boundary on numerical precision are investigated, and numerical results are compared with a recent study about added resistance of a hemishere (Zhao et al.). The agreement between them is very good. The calculation of added resisitance of a blunt ship is done under the new free surface boundary condition which takes steady disturbances into account and the calculation is also done under the classical free surface boundary condition which does not take it into account. The compatatison with experimental results shows importance of effects of steady disturbances.