| 摘要 |
PROBLEM TO BE SOLVED: To eliminate any continuous jetting of air to a ship bottom for reducing the hull frictional resistance. SOLUTION: An air reservoir forming member 3 of a square lattice structure assembled of flat plates along the vertical direction is mounted on a lower side of a ship bottom shell plate 2 in an airtight manner, and an air reservoir 4 with its upper end being closed is formed in the bottom shell plate 2. An air jetting port 5 is formed at predetermined parts of the ship bottom on the stem side from the air reservoir 4, and connected to an air jetting device 6 mounted on a hull 1 via an air pipe 7. Air 8 is jetted to the ship bottom from the air jetting port 5 by operating the air jetting device 6 while the ship is proceeding forward, and bubbles of the air 8 are trapped by each air reservoir 4 by their buoyancy. By allowing the layer of the air 8 held by each air reservoir 4 by each buoyancy to be present in a boundary layer between the ship bottom and water, the frictional resistance of the ship bottom is reduced to enhance the propulsion performance of the ship. COPYRIGHT: (C)2010,JPO&INPIT
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