Control Effect of Hydro-kinetic Force of a Special Rudder attached Flap

Control Effect of Hydro-kinetic Force of a Special Rudder attached Flap Flapped Rudder;Special rudder;Flow field;Kinetic energy;Particle Image Velocimetry; The main purpose in having a control surface on a ship is to control the motion of it. It is the important element to determine the maneuvering characteristics of the ship. In this paper, the measured results has been compared with each other to predict the performance characteristics of flapped rudder's 2-dimensional section at $Re=3.0{\times}10^4$ using 2-frame grey level cross correlation PIV method. The side force of the rudder could be mainly improved by the lift force at 10 degrees angle of attack and the drag force at 20 degrees angle of attack. The separation point and boundary layer could be controlled by the change of the only flap's angle at 10 degrees angle of attack.