MARINE PROPELLER PREVENTED FROM FRONT EDGE SEPARATING VORTEX ACCUMULATION

摘要

PURPOSE: To provide a marine propeller for improving propeller efficiency and decreasing propeller induced excitation force by weakening tip vortex. ;CONSTITUTION: A protruding body 12 with a height equivalent to 10% or less of the propeller diameter and a length equivalent to 10-80% of chord length is erected almost vertically to the blade face, pointing to the rear edge of a propeller blade 11 from around the front edge in a range from an outward angle 10° to an inward angle -50 to the circumferential direction in a position between blade 0.75R-0.975R in the back face 11A of the propeller blade 11 with a radius R.;COPYRIGHT: (C)1993,JPO&Japio