Air bubble entrainment prevention device for ships

摘要

PROBLEM TO BE SOLVED: To provide a bubble convolvement prevention apparatus of a ship that prevents decrease in efficiency of a propeller means by preventing bubble convolvement to the propeller means, while effectively reducing the frictional resistance by a navigating state of a ship and a ship situation, and improves the reduction effect of the net frictional force.SOLUTION: A bubble convolvement prevention apparatus comprises: air jet ports 21-25 that jet bubbles to at least a ship bottom 3 of a ship 1; blowers 10-14 that feed gas to the gas jet ports; and a propeller 80 provided at a stern of a hull of the ship 1. A bubble suction port that sucks at least the bubbles is provided at the backward of the air jet ports 21-25 and the forward of the propeller 80, and jets the sucked bubbles to the outside.