Scale Effect of a Kappel Tip-Rake Propeller

Abstract In this paper, the scale effect of Kappel tip-rake propellers with different end plate designs was studied using computational fluid dynamics. Given base size mesh and appropriate numerical model for determined simulation, open-water performance three bending degrees at scales calculated. Comparing these propellers, torque coefficient a propeller is more intense than that conventional propeller. addition, strong when degree increases, dwarfing on thrust coefficient. Following research wake field propeller, laws reveal influence were summarized; is, high-speed zone in relatively expands increase company trend tip cross flow. The reveals basic variation rule distribution under within Reynolds number range 4.665×10 5 −8.666×10 7 considering γ transition, as well characteristic differences between designs, which will be great significance to its optimization design application marine vehicles scales.