VIBRATING FORCE SUPPRESSING DEVICE FOR PROPELLER

PROBLEM TO BE SOLVED: To reduce friction resistance of a ship to water by blowing air into water and to suppress increment of vibrating force for a propeller due to winding air bubble by the propeller.SOLUTION: There is provided an air blowing part which blows out air into water from an air blowing port arranged at bottom part of the side of the bow. There is provided a water jetting part which jets out water into water from a jetting port 7a at the bow side of a propeller 4 so that air bubble 8 moving from the bow to stern is led in a direction apart from the propeller 4. The jetting port 7a is arranged at a position below of a propeller axis 3 for supporting the propeller 4. The jetting direction of water jetted out from the jetting port 7a is the direction obliquely down toward rear side of the ship. A plurality of jetting ports 7a are formed at a range approximately corresponding to the propeller in width direction of the ship.