Numerical Analysis Flow around a Fixed pitch Marine Propeller and PBCF by CFD

When a propeller moves in the water, a strong Vortex flow generates around the Propeller Hub that reduces the performance of the propeller. Therefore, by adding rotating Fins to the back of the propeller, the flow deviates to the back of the bow cap and reduces the intensity of the vortex. In this research, Boss Cap Fins designed parametrically and added to the B-Series Propeller. The design performance points and non-design points for B-series propeller investigated and the cavitation starting point estimated. In the following, the effect of geometric changes of PBCF discussed and a geometric model proposed. In order to validate the numerical method, a Controllable Pitch Propeller has been used. The coupled Reynolds-averaged equations with cavitation mass transfer model were used to simulate flow field. The geometric changes of the Boss Cap Fins using the proposed method depict the improved efficiency in the high advanced coefficients.