Ship equipped with bubble resistance reduction device and ship resistance reduction method

摘要

PROBLEM TO BE SOLVED: To provide a ship equipped with a bubble type resistance reduction device in which a bubble or a gas-liquid mixed fluid is supplied from a bubble supply hole provided on a hull and the bubble is introduced into a ship bottom part to reduce frictional resistance of the hull and which can efficiently introduce the bubble supplied from the bubble supply hole into a ship bottom flat part so that a bubble supply energy can be decreased to reduce a ship resistance, and a resistance reduction method of the ship.SOLUTION: When sea speed of a ship is Vs (m/s), gravity acceleration is g (m/s), and hydraulic head calculated by (0.5×Vs×Vs)/g is H (m), with respect to a cross direction of a hull 2, a bubble supply hole group 10A is arranged at a position away backward from a forward perpendicular, and in front of a position away backward by 0.25 times as long as the length between perpendiculars from the forward perpendicular. With respect to a vertical direction of the hull 2, a bubble supply hole of the bubble supply hole group is arranged at a position higher than a load water line by at least the height of the hydraulic head H.