VESSEL PRE SWIRL DUCT FOR REDUCTION OF CAVITATION

摘要

The present invention relates to a pre-swirl duct of a vessel for reducing a cavitation. The present invention is capable of forcibly jetting water from jetting nozzles to increase a decreased pressure when the pressure is partially decreased during a process wherein seawater flows into the inside of a main body, thus reducing the generation of a cavitation to prevent loss of propulsion and damages to a propeller caused by the cavitation. The pre-swirl duct of a vessel for reducing a cavitation includes a main body fixated to a ship stern in front of the propeller; jet nozzles continuously installed on the inner circumferential surface of the main body; a pump for supplying water to the respective jetting nozzles; and a controller for controlling the operation of the pump.