초록 ▼

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 str

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.

대표청구항 ▼

[ What is claimed is:] [1.] A method for reducing frictional-resistance at a hull (2) of a ship (1), characterized in that said method comprising a step of ejecting micro-bubbles (8) each having an average diameter which is set at approximately 1 mm,wherein said micro-bubbles (8) are ejected into wa

[ What is claimed is:] [1.] A method for reducing frictional-resistance at a hull (2) of a ship (1), characterized in that said method comprising a step of ejecting micro-bubbles (8) each having an average diameter which is set at approximately 1 mm,wherein said micro-bubbles (8) are ejected into water from a position adjacent to the starting point of a desired stream line (F.L.) of water and from a position where the static pressure is low,said stream line (F.L.) being directed, from the submerged shallow position at a stein portion (4) of said ship's hull (2), to the ship's bottom (5) along both side surfaces of said ship's hull (2), so that said ejected micro-bubbles (8) are carried to said ship's bottom (5) along said strewn line (F.L.),whereby said micro-bubbles (8) are distributed at least a part of the circumferential area of said submerged portion of said hull (2), thus reducing frictional-resistance at said hull (2) of said ship (1) while cruising.