Method for reducing propeller noise

Details Method for reducing propeller noise Method for reducing propeller noise

1977-03-24

1979-01-23

Blix, Trygve M.

Ships

Hull or hull adjunct employing fluid dynamic forces to...

Having hydrofoil

114 67A, B63B 3500

Patent

active

041354699

ABSTRACT:
A method and a device for blowing gaseous medium between the propeller and the hull of a ship the vibration and noise caused in the ship by its driving propeller is considerably reduced. In order to optimize the application of this noise reducing method the total flow Q of the gaseous medium blown out should, expressed in normal cubic meters per hour, satisfy a special formula.

REFERENCES:
patent: 1254892 (1918-01-01), Elniff
patent: 3084651 (1963-04-01), Parmenter

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