ObjectTo suppress vortex generation from a blade tip of a blade and an increase in friction loss generated during propulsion of a marine vessel.Solving MeansA propulsor for a marine vessel for propelling a marine vessel includes: a duct provided below a hull of the marine vessel; and a propeller rotatably disposed inside the duct, wherein the propeller includes a blade and a cylindrical part having a cylindrical shape, surrounding the blade, and fixed to a blade tip of the blade, and in a cross sectional view in an extending direction of the duct, assuming that a virtual line passing through a leading edge and a trailing edge of the duct is a first line, and that a line connecting, from the leading edge to the trailing edge of the duct, centers of inscribing circles that are each in contact with both an inner surface and an outer surface of the duct is a second line, the second line is positioned closer to a side of the outer surface of the duct than the first line.
PROPULSOR FOR MARINE VESSEL, AND MARINE VESSEL
SCHIFFSANTRIEB UND SCHIFF
PROPULSEUR POUR NAVIRE MARIN ET NAVIRE MARIN
2022-10-05
Patent
Electronic Resource
English
IPC: | B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING |