Pearne & Gordon LLP
Method for reducing frictional resistance of hull, frictional resistance reducing ship using such method, and method for analyzing ejected air-bubbles from ship
 A method for reducing frictional-resistance at a hull (2) of a ship (1), characterized in that the method comprising a step of ejecting micro-bubbles (8) having predetermined diameters; wherein the micro-bubbles (8) are ejected into water from a position adjacent to the starting point of desired stream line (F.L.) of water and from the position where the static pressure is low; the stream line (F.L.) being directed, from the submerged shallow position at a stem portion (4) of the ship's hull (2), to the ship's bottom (5) along both side surfaces of the ship's hull (2), so that the ejected micro-bubbles (8) are transferred to the ship's bottom (5) along the stream line (F.L.); whereby the micro-bubbles (8) are distributed at at least a part of the circumferential area of the submerged portion of the hull (2), thus reducing frictional-resistance at a hull (2) of a ship (1) while cruising. 
Ishikawajima-Harima Heavy Industries Co., Ltd.
Y F B B B G
Y02T F15D B63B B63B B63B G01M
additional inventional inventional additional inventional inventional
Akira Osamu Hiroharu Yuki Yoshiaki
Masuko Watanabe Kato Yoshida Takahashi