Hydrodynamic Performance Study of POD on Single Screw Commercial Vessel

Based on comparative model test results of practicing single propeller commercial ships pushed by conventional propeller with POD,this paper presents properties of them and analyses the rule of each performance. Study results show that speed performance of single propeller ship used by POD may be to some tune of used by convention propeller.But directional stability of POD is weak than rudder.This may be enhanced by increasing its project side area. Manoeuvrability of ship in small rudder angle and turning circle in large rudder angle studied by both propulsion types are no obvious difference in design speed.Manoeuvrability of POD will be significant advantage in low speed or zero speed.