To provide a frictional resistance reduction device for a ship capable of properly changing the site of producing a bubble and the amount of bubbles according to a navigation state of a ship or the state of the ship, capable of effectively reducing frictional resistance by accurately blowing out the bubbles even when there is a disturbance, and capable of using an action of producing bubbles.
The frictional resistance reduction device for the ship comprises: a ship 1; a plurality of gas blowing openings 21, 22, 23, 24, 25 for blowing out the bubble at ship's bottom of the ship; a plurality of blowers 11, 12, 13, 14, 15 corresponding to the plurality of gas blowing openings for supplying the gas to the plurality of gas blowing openings; an electric motor for driving the plurality of air supply means; a navigation state detection part A110, a navigation state detection part B115 for detecting the navigation state of the ship; and a comparator 140 and a controller 150 for changing an air supply state by controlling the blower according to detection results of these navigation state detection parts. The frictional resistance reduction device blows out the bubble by suppressing variation with respect to the disturbance such as a wave, and increases a reduction effect of the net frictional resistance by changing the number of gas blowing openings or the blowing amount of the bubble according to the navigation state.
COPYRIGHT: (C)2010,JPO&INPIT
Kawashima Hidemiki
Yoshiaki Kodama
掘 Toshifumi
Masahiko Makino
Large rope Masashi
Takeko Haruya
