Performace and Cavitation Analysis of Effect Variation Rake Angle Propeller B–Series

Propeller is one of the mechanical component on a ship, which can run ships from one place to another. The most important thing in a propeller is the mechanical properties or strength of the propeller in accepting the load to be able to run the ship. Another factor that affects mechanical propeller properties is the propeller design itself. In propeller design, one thing that can be considered is the rake angle of propeller. The rake angle is the slope angle between the propeller blade and the propeller center. The rake angle on the propeller is used to increase the amount of mass water used to produce thrust that needed by ship. Reducing the rake angle can increase the efficiency of the B-Series propeller slightly. In this research, variations will be made from the B-Series propeller rake angle with the aim of obtaining propeller thrust and cavitation values. In this study, the analysis use the CFD (Computational Fluid Dynamic) method. The results was obtained from the simulation with greatest thrust and efficiency, that is in the 5º rake angle variations of 2310,273 kN and 70% efficiency, while the smallest thrust value is variation of rake angle 25º for 1110,933 kN. Then for the largest cavitation level is in the variation of the 25º rake angle and the smallest at the 15º original rake angle.