Influence of thrust fins on hydrodynamic performance of pod propeller

Based on the viscous flow theory, the influence of the arrangement and geometrical changes of the thrust fins on the hydrodynamic performance of the pod propeller is studied by using the sliding grid technology and the commercial fluid calculation software FINE / marine.The results show that the extension of the thrust fin can slightly increase the resistance performance and propulsion efficiency of the pod propeller while significantly reducing the lateral force of the pod.Changing the circumferential position of the thrust fin can change the magnitude and even the direction of the total lateral force of the nacelle without affecting the resistance of the propeller. The thruster is the most efficient when the circumferential angle of the thrust fin is 60 degrees.When the initial angle of attack of the fin is in the range of -4 to 8, the angle of attack is larger, the efficiency of the thruster is higher, the total lateral force is smaller, and the cabin resistance is smaller. However, after the angle of attack is greater than 4 degrees, the cabin resistance is no longer reduced.