Experimental study on hydrodynamic forces acting on ship hull and rudder behind the propeller in regular waves

Abstract

In recent years, intensive efforts are being concerned toward the predicting ship maneuvering performance in waves. Since ship maneuverability highly influenced by the wave on the water surface, enhancement of ship maneuverability at the ship design state is an important method. In this paper, the model test is performed for investigating the impact of wavelength and wave direction on the hydrodynamic force of a ship hull and rudder. The number of propeller revolution is determined for the model speed corresponding to full-scale service speed in calm water is kept constant during the test. The hydrodynamic force of rudder and ship hull have measured in calm water and in regular waves. In order to confirm the experimental result, the added resistance in wave in head sea is compared with results from other institutes. The added resistance in wave in head sea shows fair agreement with experimental results of different institutes. The changing of hydrodynamic forces of a ship and rudder in various wavelengths is discussed in various wave directions and rudder angle. Hydrodynamic forces acting on the ship hull and rudder behind propeller are compared with one without propeller.