PROBLEM TO BE SOLVED: To provide a hull frictional resistance reduction device using the air, capable of reducing a frictional resistance, to solve an issue of reduction of net CO2 emission amount that cannot be solved by: a method of surrounding the full with air bubbles to reduce frictional resistance that the hull receives, with a drawback of a significant increase in a power energy used for delivering the air to a hull bottom, thus, resulting in occurrence of the power energy consumption; and a method of storing the air in the hull bottom in the water, with a drawback of difference in water surface positions, i.e. contact surface positions between air and water, among respective air chambers, resulting in occurrence of new resistance in the air chambers.SOLUTION: A hull frictional resistance reduction device comprises: inclined fixed wings 13 in an underwater part, to turn flowing water coming into an air absorbing chamber 10 to make vortexes so as to create a negative pressure causing the air voluntarily introduced into the underwater part. In addition, vent holes are provided in upper parts of multiple partitions for air storage hubs in the underwater part so that the air storage hubs can be communicated to level water surface positions of the air storage hubs, whereby, frictional resistance on the hull can be reduced.SELECTED DRAWING: Figure 1
【課題】気泡で水面下の船体を覆い、船体が受ける摩擦抵抗を低減できても、同時に空気を船底に送る動力エネルギーも大きく消耗するために、正味のCO2排出量の低減にはつながらない。動力エネルギーを消耗するという問題がある。また水中下の船底に空気を溜めても、空気槽内の水面、即ち空気と水の接触面の位置が、各空気槽で異なるために、新たな抵抗が前記空気槽内に発生する問題がある。本発明の目的は、上記の問題を解決し、空気を利用して船舶の摩擦抵抗の低減を可能とする、船体摩擦抵抗低減装置を提供することである。【解決手段】水中部に角度を持たせた固定翼13を設け、空気吸入装置10内へ押し入る流水を旋回させ渦を作り、前記渦の中に負圧を生成し、水中部に空気を自吸させる。また水中部の複数の空気溜りの仕切板の上部に通気口を設け、各空気溜りが連通するようにし、各空気溜りの水位が均一にし、船体の摩擦抵抗を低減する。【選択図】図1
HULL FRICTIONAL RESISTANCE REDUCTION DEVICE
船体摩擦抵抗低減装置
2017-09-21
Patent
Electronic Resource
Japanese
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |
HULL FRICTIONAL RESISTANCE REDUCTION METHOD AND HULL FRICTIONAL RESISTANCE REDUCTION DEVICE
European Patent Office | 2017
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