JP5675148B2 - Ship resistance reduction device - Google Patents

Ship resistance reduction device Download PDF

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JP5675148B2
JP5675148B2 JP2010085930A JP2010085930A JP5675148B2 JP 5675148 B2 JP5675148 B2 JP 5675148B2 JP 2010085930 A JP2010085930 A JP 2010085930A JP 2010085930 A JP2010085930 A JP 2010085930A JP 5675148 B2 JP5675148 B2 JP 5675148B2
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gas holding
gas
ship
hull
gap
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JP2011213324A (en
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真一 ▲高▼野
真一 ▲高▼野
宗二 溝上
宗二 溝上
日笠　靖司郎
靖司郎 日笠
千春 川北
千春 川北
孝志 峰
孝志 峰
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Mitsubishi Heavy Industries Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

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Description

本発明は、空気吹き出しにより船体の摩擦抵抗を低減する抵抗低減装置に関する。   The present invention relates to a resistance reduction device that reduces the frictional resistance of a hull by air blowing.

航行時に船底面を気泡流で覆うことにより船体摩擦抵抗を低減する技術が知られている。   A technique for reducing the hull frictional resistance by covering the bottom of the ship with a bubbly flow during navigation is known.

図１Ａ、１Ｂを参照して、特許文献１の船体摩擦抵抗低減装置を説明する。船舶の船底部１の船首側に気体室２が設けられている。気体室２は船幅方向に形成されている。左右一対の気体保持板５が船底両舷部に沿って船首から船尾にかけて設けられている。気体室２から水中へ気体が吹き出され、船底面に沿い後方へ流れる気泡流が発生する。気体保持板５により気泡流の船体側方への逸脱が防止される。このようにして、船体の摩擦抵抗が軽減される。   With reference to FIGS. 1A and 1B, the hull frictional resistance reduction device of Patent Document 1 will be described. A gas chamber 2 is provided on the bow side of the ship bottom 1. The gas chamber 2 is formed in the ship width direction. A pair of left and right gas holding plates 5 are provided from the bow to the stern along the bottom of the ship bottom. Gas is blown out from the gas chamber 2 into the water, and a bubble flow that flows backward along the ship bottom is generated. The gas holding plate 5 prevents the bubble flow from deviating to the side of the hull. In this way, the frictional resistance of the hull is reduced.

本発明者は、図１Ａ、１Ｂに示されるように気体保持板５が船体の前後方向に沿って連続的に設けられる場合、船体のサギングやホギングにより気体保持板５に縦曲げが生じて気体保持板５の船体中央部近傍位置に割れが生じる可能性があることに気がついた。更に気体保持板５が船体に溶接されている場合、気体保持板５の割れにより生じたクラックが船体に達して船体が割れてしまうリスクがある。   When the gas holding plate 5 is continuously provided along the longitudinal direction of the hull as shown in FIGS. 1A and 1B, the inventor causes the gas holding plate 5 to be bent vertically due to sagging or hogging of the hull. It has been found that there is a possibility that a crack may occur at a position near the center of the hull of the holding plate 5. Further, when the gas holding plate 5 is welded to the hull, there is a risk that a crack caused by the crack of the gas holding plate 5 reaches the hull and the hull is broken.

特許文献２は他の船体摩擦抵抗低減装置を開示している。   Patent Document 2 discloses another hull frictional resistance reduction device.

特開２００８−１４３３４５号公報JP 2008-143345 A 特開２００８−１１４７１０号公報JP 2008-114710 A

本発明の目的は、気泡流が船底から船体側方に逸脱することを防止する気体保持構造に割れが生じることが防止される船舶の抵抗低減装置を提供することである。   An object of the present invention is to provide a resistance reduction device for a ship in which cracking is prevented from occurring in a gas holding structure that prevents a bubble flow from deviating from the ship bottom to the side of the hull.

以下に、（発明を実施するための形態）で使用される番号を用いて、課題を解決するための手段を説明する。これらの番号は、（特許請求の範囲）の記載と（発明を実施するための形態）との対応関係を明らかにするために付加されたものである。ただし、それらの番号を、（特許請求の範囲）に記載されている発明の技術的範囲の解釈に用いてはならない。   The means for solving the problem will be described below using the numbers used in the (DETAILED DESCRIPTION). These numbers are added to clarify the correspondence between the description of (Claims) and (Mode for Carrying Out the Invention). However, these numbers should not be used to interpret the technical scope of the invention described in (Claims).

本発明による船舶の抵抗低減装置は、船体（１０）の船底（１３）に設けられた空気吹き出し口（３１）から空気を吹き出す空気吹き出し装置（３０）と、前記船底に設けられた複数の気体保持構造（４１〜４５）とを具備する。前記複数の気体保持構造の各々は、前記船体の前後方向（Ｘ）に沿って配列された複数の気体保持板（５１〜５５）を備える。前記複数の気体保持板は、前記前後方向に隙間（６１〜６５）が設けられるように配列される。前記複数の気体保持構造は、前記船底の左舷側縁部分（１３ａ）に配置された第１気体保持構造（４１）と、前記船底の右舷側縁部分（１３ｂ）に配置された第２気体保持構造（４２）とを含む。   The ship resistance reducing device according to the present invention includes an air blowing device (30) for blowing air from an air blowing port (31) provided on the bottom (13) of a hull (10), and a plurality of gases provided on the bottom of the vessel. Holding structure (41-45). Each of the plurality of gas holding structures includes a plurality of gas holding plates (51 to 55) arranged along the longitudinal direction (X) of the hull. The plurality of gas holding plates are arranged so that gaps (61 to 65) are provided in the front-rear direction. The plurality of gas holding structures include a first gas holding structure (41) disposed on the port side edge portion (13a) of the ship bottom and a second gas holding structure disposed on the starboard side edge portion (13b) of the vessel bottom. Structure (42).

前記複数の気体保持構造は、前記左舷側縁部分に配置された第３気体保持構造（４３）と、前記右舷側縁部分に配置された第４気体保持構造（４４）とを含む。前記第１気体保持構造における前記複数の気体保持板の前記隙間と前記第３気体保持構造における前記複数の気体保持板の前記隙間とは、前記前後方向の位置がずれている。前記第２気体保持構造における前記複数の気体保持板の前記隙間と前記第４気体保持構造における前記複数の気体保持板の前記隙間とは、前記前後方向の位置がずれている。   The plurality of gas holding structures include a third gas holding structure (43) arranged at the port side edge portion and a fourth gas holding structure (44) arranged at the starboard side edge portion. The front-rear direction positions of the gaps of the plurality of gas holding plates in the first gas holding structure and the gaps of the plurality of gas holding plates in the third gas holding structure are shifted. The front-rear direction positions of the gaps of the plurality of gas holding plates in the second gas holding structure and the gaps of the plurality of gas holding plates in the fourth gas holding structure are shifted.

前記複数の気体保持構造の数が３以上である。前記複数の気体保持構造は、前記船体の左右方向（Ｙ）に等間隔に配置される。   The number of the plurality of gas holding structures is 3 or more. The plurality of gas holding structures are arranged at equal intervals in the left-right direction (Y) of the hull.

前記複数の気体保持構造から任意に選択される互いに隣り合う二つの気体保持構造のうちの一方側気体保持構造における前記複数の気体保持板の前記隙間と前記二つの気体保持構造のうちの他方側気体保持構造における前記複数の気体保持板の前記隙間とは、前記前後方向の位置がずれている。   The gap of the plurality of gas holding plates and the other side of the two gas holding structures in one side gas holding structure among two gas holding structures adjacent to each other arbitrarily selected from the plurality of gas holding structures The position in the front-rear direction is deviated from the gaps of the plurality of gas holding plates in the gas holding structure.

前記複数の気体保持板の各々は、Ｒ又は傾斜が形成された前方側エッジ（５１ａ）と、Ｒ又は傾斜が形成された後方側エッジ（５１ｂ）とを備える。   Each of the plurality of gas holding plates includes a front edge (51a) having an R or an inclination and a rear edge (51b) having an R or an inclination.

本発明によれば、気泡流が船底から船体側方に逸脱することを防止する気体保持構造に割れが生じることが防止される船舶の抵抗低減装置が提供される。   ADVANTAGE OF THE INVENTION According to this invention, the resistance reduction apparatus of the ship by which it is prevented that a crack arises in the gas holding structure which prevents a bubble flow from deviating from the ship bottom to the hull side is provided.

図１Ａは、従来の船体摩擦抵抗低減装置を備えた船舶の側面図である。FIG. 1A is a side view of a ship provided with a conventional hull frictional resistance reduction device. 図１Ｂは、従来の船体摩擦抵抗低減装置を備えた船舶の底面図である。FIG. 1B is a bottom view of a ship provided with a conventional hull frictional resistance reduction device. 図２Ａは、本発明の第１の実施形態に係る抵抗低減装置を備えた船舶の底面図である。FIG. 2A is a bottom view of the ship provided with the resistance reduction device according to the first embodiment of the present invention. 図２Ｂは、第１の実施形態に係る抵抗低減装置を備えた船舶の側面図である。FIG. 2B is a side view of the ship provided with the resistance reduction device according to the first embodiment. 図３は、第１の実施形態に係る気体保持構造の気泡を保持する効果を説明する模式図である。FIG. 3 is a schematic diagram for explaining the effect of holding the bubbles of the gas holding structure according to the first embodiment. 図４Ａは、第１の実施形態の第１変形例に係る気体保持板を示す。FIG. 4A shows a gas holding plate according to a first modification of the first embodiment. 図４Ｂは、第１の実施形態の第２変形例に係る気体保持板を示す。FIG. 4B shows a gas holding plate according to a second modification of the first embodiment. 図５は、本発明の第２の実施形態に係る抵抗低減装置を備えた船舶の底面図である。FIG. 5 is a bottom view of a ship provided with the resistance reducing device according to the second embodiment of the present invention. 図６は、本発明の第３の実施形態に係る抵抗低減装置を備えた船舶の底面図である。FIG. 6 is a bottom view of a ship provided with the resistance reducing device according to the third embodiment of the present invention. 図７は、第１の実施形態に係る気体保持構造のローリング時における気泡を保持する効果を示す模式図である。FIG. 7 is a schematic diagram illustrating an effect of retaining bubbles during rolling of the gas retaining structure according to the first embodiment. 図８は、第３の実施形態に係る気体保持構造のローリング時における気泡を保持する効果を示す模式図である。FIG. 8 is a schematic diagram illustrating the effect of retaining bubbles during rolling of the gas retaining structure according to the third embodiment.

添付図面を参照して、本発明による船舶の抵抗低減装置を実施するための形態を以下に説明する。   With reference to an accompanying drawing, the form for carrying out the resistance reduction device of the ship by the present invention is explained below.

（第１の実施形態）
図２Ａを参照して、本発明の第１の実施形態に係る抵抗低減装置２０が設けられた船体１０は、船首１１と、船尾１２と、船底１３と、左舷１４と、右舷１５と、プロペラ１６と、舵１７を備える。船底１３は、左舷側縁部分１３ａと、右舷側部分１３ｂを含む。船体１０の前後方向及び左右方向が、それぞれＸ及びＹで示されている。 (First embodiment)
Referring to FIG. 2A, a hull 10 provided with a resistance reducing device 20 according to the first embodiment of the present invention includes a bow 11, a stern 12, a ship bottom 13, a port 14, a starboard 15, and a propeller. 16 and a rudder 17. The ship bottom 13 includes a port side edge portion 13a and a starboard side portion 13b. The front-rear direction and the left-right direction of the hull 10 are indicated by X and Y, respectively.

抵抗低減装置２０は、空気吹き出し装置３０と、気体保持構造４１及び４２とを備える。空気吹き出し装置３０は、船底１３の船首１１側部分に設けられた空気吹き出し口３１から水中に空気を吹き出す。気体保持構造４１は、空気吹き出し口３１よりも船尾１２側に配置されるように、左舷側縁部分１３ａに設けられている。気体保持構造４２は、空気吹き出し口３１よりも船尾１２側に配置されるように、右舷側縁部分１３ｂに設けられている。   The resistance reduction device 20 includes an air blowing device 30 and gas holding structures 41 and 42. The air blowing device 30 blows air into the water from an air blowing port 31 provided in the bow 11 side portion of the ship bottom 13. The gas holding structure 41 is provided on the port side edge portion 13a so as to be disposed on the stern 12 side with respect to the air outlet 31. The gas holding structure 42 is provided on the starboard side edge portion 13b so as to be disposed closer to the stern 12 than the air outlet 31 is.

気体保持構造４１は、前後方向Ｘに沿って配列された複数の気体保持板５１を備える。各気体保持板５１は船底１３から下方に突き出している。複数の気体保持板５１は、前後方向Ｘに隙間６１が設けられるように配列されている。   The gas holding structure 41 includes a plurality of gas holding plates 51 arranged along the front-rear direction X. Each gas holding plate 51 protrudes downward from the ship bottom 13. The plurality of gas holding plates 51 are arranged so that gaps 61 are provided in the front-rear direction X.

気体保持構造４２は、前後方向Ｘに沿って配列された複数の気体保持板５２を備える。各気体保持板５２は船底１３から下方に突き出している。複数の気体保持板５２は、前後方向Ｘに隙間６２が設けられるように配列されている。   The gas holding structure 42 includes a plurality of gas holding plates 52 arranged along the front-rear direction X. Each gas holding plate 52 protrudes downward from the ship bottom 13. The plurality of gas holding plates 52 are arranged so that gaps 62 are provided in the front-rear direction X.

図２Ｂを参照して、空気吹き出し装置３０は、空気を吹き出すためのコンプレッサ又はブロワ３２を備える。   Referring to FIG. 2B, the air blowing device 30 includes a compressor or blower 32 for blowing out air.

図３を参照して、航行中に空気吹き出し装置３０が空気吹き出し口３１から水中に吹き出した空気によって形成された気泡７０は、船底１３を覆うように後方に向かって流れる気泡流を形成する。この気泡７０によって船体１０の摩擦抵抗が低減される。気体保持構造４１及び４２は、気泡７０が浮力により船底１３から船体１０側方に逸脱することを防止する。   Referring to FIG. 3, the bubbles 70 formed by the air blown out from the air blowing port 31 into the water by the air blowing device 30 during navigation form a bubble flow that flows backward so as to cover the ship bottom 13. The bubbles 70 reduce the frictional resistance of the hull 10. The gas holding structures 41 and 42 prevent the bubbles 70 from deviating from the bottom 13 to the side of the hull 10 due to buoyancy.

更に、気体保持構造４１が前後方向Ｘに延びる連続した単一の気体保持板から構成されずに隙間６１が設けられた複数の気体保持板５１から構成され、気体保持構造４２が前後方向Ｘに延びる連続した単一の気体保持板から構成されずに隙間６２が設けられた複数の気体保持板５２から構成されるため、サギングやホギングにより船体１０に縦曲げが生じても気体保持構造４１及び４２（気体保持板５１及び５２）に割れが生じることが防止される。その結果、気体保持構造４１及び４２が船底１３に溶接されている場合であっても、サギングやホギングにより船体１０が割れてしまうことが防止される。   Further, the gas holding structure 41 is not constituted by a continuous single gas holding plate extending in the front-rear direction X, but is constituted by a plurality of gas holding plates 51 provided with gaps 61, and the gas holding structure 42 is formed in the front-rear direction X. Since it is composed of a plurality of gas retaining plates 52 provided with gaps 62 without being composed of a continuous single gas retaining plate extending, the gas retaining structure 41 and 42 (gas holding plates 51 and 52) is prevented from being cracked. As a result, even if the gas holding structures 41 and 42 are welded to the ship bottom 13, the hull 10 is prevented from being broken by sagging or hogging.

（第１の実施形態の第１変形例）
図４Ａを参照して、第１の実施形態の第１変形例を説明する。第１変形例に係る気体保持板５１が備える前方側エッジ５１ａにＲが形成され、気体保持板５１が備える後方側エッジ５１ｂにＲが形成されている。このＲにより、応力集中領域８０における応力集中が低減される。同様に、気体保持板５２が備える前方側エッジにＲが形成され、気体保持板５２が備える後方側エッジにＲが形成されている。 (First modification of the first embodiment)
A first modification of the first embodiment will be described with reference to FIG. 4A. R is formed on the front edge 51 a included in the gas holding plate 51 according to the first modification, and R is formed on the rear edge 51 b included in the gas holding plate 51. By this R, stress concentration in the stress concentration region 80 is reduced. Similarly, R is formed at the front edge provided in the gas holding plate 52, and R is formed at the rear edge provided in the gas holding plate 52.

（第１の実施形態の第２変形例）
図４Ｂを参照して、第１の実施形態の第２変形例を説明する。第２変形例に係る気体保持板５１が備える前方側エッジ５１ａに傾斜が形成され、気体保持板５１が備える後方側エッジ５１ｂに傾斜が形成されている。前方側エッジ５１ａ及び後方側エッジ５１ｂは船底１３に対して傾斜している。すなわち、前方側エッジ５１ａ及び後方側エッジ５１ｂが三角形に形成される。この傾斜により、応力集中領域８０における応力集中が低減される。同様に、気体保持板５２が備える前方側エッジに傾斜が形成され、気体保持板５２が備える後方側エッジに傾斜が形成されている。なお、前方側エッジ及び後方側エッジの一方にＲが形成され、前方側エッジ及び後方側エッジの他方に傾斜が形成されてもよい。 (Second modification of the first embodiment)
A second modification of the first embodiment will be described with reference to FIG. 4B. A slope is formed in the front edge 51a provided in the gas holding plate 51 according to the second modification, and a slope is formed in the rear edge 51b provided in the gas holding plate 51. The front edge 51 a and the rear edge 51 b are inclined with respect to the ship bottom 13. That is, the front edge 51a and the rear edge 51b are formed in a triangle. Due to this inclination, the stress concentration in the stress concentration region 80 is reduced. Similarly, an inclination is formed at the front edge provided in the gas holding plate 52, and an inclination is formed at the rear edge provided in the gas holding plate 52. Note that R may be formed on one of the front edge and the rear edge, and an inclination may be formed on the other of the front edge and the rear edge.

（第２の実施形態）
図５を参照して、本発明の第２の実施形態に係る抵抗低減装置２０を説明する。本実施形態に係る抵抗低減装置２０は、気体保持構造４３及び４４を更に備える点を除いて第１の実施形態に係る抵抗低減装置２０と同様である。気体保持構造４３は、空気吹き出し口３１よりも船尾１２側に配置されるように、左舷側部分１３ａに設けられている。気体保持構造４４は、空気吹き出し口３１よりも船尾１２側に配置されるように、右舷側部分１３ｂに設けられている。 (Second Embodiment)
With reference to FIG. 5, the resistance reduction apparatus 20 which concerns on the 2nd Embodiment of this invention is demonstrated. The resistance reduction device 20 according to the present embodiment is the same as the resistance reduction device 20 according to the first embodiment, except that the gas holding structures 43 and 44 are further provided. The gas holding structure 43 is provided on the port side portion 13a so as to be disposed closer to the stern 12 than the air outlet 31. The gas holding structure 44 is provided on the starboard side portion 13b so as to be disposed closer to the stern 12 than the air outlet 31.

気体保持構造４３は、前後方向Ｘに沿って配列された複数の気体保持板５３を備える。各気体保持板５３は船底１３から下方に突き出している。複数の気体保持板５３は、前後方向Ｘに隙間６３が設けられるように配列されている。   The gas holding structure 43 includes a plurality of gas holding plates 53 arranged along the front-rear direction X. Each gas holding plate 53 protrudes downward from the ship bottom 13. The plurality of gas holding plates 53 are arranged so that gaps 63 are provided in the front-rear direction X.

複数の気体保持板５１及び複数の気体保持板５３は、隙間６１と隙間６３の前後方向Ｘの位置がずれるように配置される。例えば、複数の気体保持板５１及び複数の気体保持板５３は千鳥形配列とされる。   The plurality of gas holding plates 51 and the plurality of gas holding plates 53 are arranged such that the positions of the gap 61 and the gap 63 in the front-rear direction X are shifted. For example, the plurality of gas holding plates 51 and the plurality of gas holding plates 53 are in a staggered arrangement.

気体保持構造４４は、前後方向Ｘに沿って配列された複数の気体保持板５４を備える。各気体保持板５４は船底１３から下方に突き出している。複数の気体保持板５４は、前後方向Ｘに隙間６４が設けられるように配列されている。   The gas holding structure 44 includes a plurality of gas holding plates 54 arranged along the front-rear direction X. Each gas holding plate 54 protrudes downward from the ship bottom 13. The plurality of gas holding plates 54 are arranged so that gaps 64 are provided in the front-rear direction X.

複数の気体保持板５２及び複数の気体保持板５４は、隙間６２と隙間６４の前後方向Ｘの位置がずれるように配置される。例えば、複数の気体保持板５２及び複数の気体保持板５４は千鳥形配列とされる。   The plurality of gas holding plates 52 and the plurality of gas holding plates 54 are arranged such that the positions of the gap 62 and the gap 64 in the front-rear direction X are shifted. For example, the plurality of gas holding plates 52 and the plurality of gas holding plates 54 are in a staggered arrangement.

本実施形態によれば、隙間６１と隙間６３の前後方向Ｘの位置がずれているために隙間６１及び隙間６３を通って気泡７０が船底１３から船体１０側方に逸脱することが防止され、隙間６２と隙間６４の前後方向Ｘの位置がずれているために隙間６２及び隙間６４を通って気泡７０が船底１３から船体１０側方に逸脱することが防止される。   According to this embodiment, since the positions of the gap 61 and the gap 63 in the front-rear direction X are shifted, the bubbles 70 are prevented from deviating from the bottom 13 to the side of the hull 10 through the gap 61 and the gap 63. Since the positions of the gap 62 and the gap 64 in the front-rear direction X are shifted, the bubbles 70 are prevented from deviating from the bottom 13 to the side of the hull 10 through the gap 62 and the gap 64.

（第３の実施形態）
図６を参照して、本発明の第３の実施形態に係る抵抗低減装置２０を説明する。本実施形態に係る抵抗低減装置２０は、気体保持構造４３乃至４５を更に備える点を除いて第１の実施形態に係る抵抗低減装置２０と同様である。気体保持構造４３乃至４５は、空気吹き出し口３１よりも船尾１２側に配置され且つ気体保持構造４１及び４２の間に配置されるように、船底１３に設けられている。 (Third embodiment)
With reference to FIG. 6, the resistance reduction apparatus 20 which concerns on the 3rd Embodiment of this invention is demonstrated. The resistance reduction device 20 according to the present embodiment is the same as the resistance reduction device 20 according to the first embodiment, except that gas retention structures 43 to 45 are further provided. The gas holding structures 43 to 45 are provided on the ship bottom 13 so as to be arranged closer to the stern 12 than the air outlet 31 and between the gas holding structures 41 and 42.

気体保持構造４３は、前後方向Ｘに沿って配列された複数の気体保持板５３を備える。複数の気体保持板５３は、前後方向Ｘに隙間６３が設けられるように配列されている。各気体保持板５３は船底１３から下方に突き出している。気体保持構造４４は、前後方向Ｘに沿って配列された複数の気体保持板５４を備える。複数の気体保持板５４は、前後方向Ｘに隙間６４が設けられるように配列されている。各気体保持板５４は船底１３から下方に突き出している。気体保持構造４５は、前後方向Ｘに沿って配列された複数の気体保持板５５を備える。複数の気体保持板５５は、前後方向Ｘに隙間６５が設けられるように配列されている。各気体保持板５５は船底１３から下方に突き出している。気体保持構造４１乃至４５は、左右方向Ｙに等間隔に配置されている。   The gas holding structure 43 includes a plurality of gas holding plates 53 arranged along the front-rear direction X. The plurality of gas holding plates 53 are arranged so that gaps 63 are provided in the front-rear direction X. Each gas holding plate 53 protrudes downward from the ship bottom 13. The gas holding structure 44 includes a plurality of gas holding plates 54 arranged along the front-rear direction X. The plurality of gas holding plates 54 are arranged so that gaps 64 are provided in the front-rear direction X. Each gas holding plate 54 protrudes downward from the ship bottom 13. The gas holding structure 45 includes a plurality of gas holding plates 55 arranged along the front-rear direction X. The plurality of gas holding plates 55 are arranged so that gaps 65 are provided in the front-rear direction X. Each gas holding plate 55 protrudes downward from the ship bottom 13. The gas holding structures 41 to 45 are arranged at equal intervals in the left-right direction Y.

図７を参照して、本実施形態に係る気体保持構造４１乃至４５の効果の理解を助けるため、第１の実施形態に係る気体保持構造４１及び４２のローリング時における気泡を保持する効果を説明する。気泡７０は気体保持構造４１と気体保持構造４２の間で自由に移動できるため、ローリングにより右舷１５が持ち上がると、浮力により気泡７０が気体保持構造４２の近傍の一箇所に集まる。このため、気泡７０の分布にムラができ、摩擦抵抗低減効果が減少する。   With reference to FIG. 7, in order to help understanding of the effects of the gas holding structures 41 to 45 according to the present embodiment, the effect of holding bubbles during the rolling of the gas holding structures 41 and 42 according to the first embodiment will be described. To do. Since the bubbles 70 can freely move between the gas holding structure 41 and the gas holding structure 42, when the starboard 15 is lifted by rolling, the bubbles 70 gather at one place near the gas holding structure 42 by buoyancy. For this reason, the distribution of the bubbles 70 is uneven, and the frictional resistance reduction effect is reduced.

図８を参照して、第３の実施形態に係る気体保持構造４１乃至４５のローリング時における気泡を保持する効果を説明する。気体保持構造４３乃至４５が気体保持構造４１と気体保持構造４２との間に設けられているため、気泡７０は気体保持構造４１と気体保持構造４２の間で自由に移動できない。このため、ローリングにより右舷１５が持ち上がっても気泡７０が一箇所に集まらない。したがって、気泡７０の分布にムラができず、摩擦抵抗低減効果が減少しない。   With reference to FIG. 8, the effect of holding bubbles during rolling of the gas holding structures 41 to 45 according to the third embodiment will be described. Since the gas holding structures 43 to 45 are provided between the gas holding structure 41 and the gas holding structure 42, the bubbles 70 cannot freely move between the gas holding structure 41 and the gas holding structure 42. For this reason, even if the starboard 15 is lifted by rolling, the bubbles 70 do not collect in one place. Accordingly, the distribution of the bubbles 70 cannot be uneven, and the frictional resistance reduction effect does not decrease.

本実施形態において、気体保持構造４１乃至４５から任意に選択される互いに隣り合う二つの気体保持構造の間で隙間の前後方向Ｘの位置がずれていることが好ましい。具体的には、気体保持構造４１及び４３が互いに隣り合い、気体保持構造４３及び４５が互いに隣り合い、気体保持構造４５及び４４が互いに隣り合い、気体保持構造４４及び４２が互いに隣り合う場合、隙間６１と隙間６３の前後方向Ｘの位置がずれており、隙間６３と隙間６５の前後方向Ｘの位置がずれており、隙間６５と隙間６４の前後方向Ｘの位置がずれており、隙間６４と隙間６２の前後方向Ｘの位置がずれていることが好ましい。例えば、複数の気体保持板５１、複数の気体保持板５３、複数の気体保持板５５、複数の気体保持板５４、及び複数の気体保持板５２は千鳥形配列とされる。互いに隣り合う二つの気体保持構造の間で隙間の前後方向Ｘの位置がずれていることで、気泡７０の左右方向Ｙの移動がより制限される。   In the present embodiment, it is preferable that the position of the gap in the front-rear direction X is shifted between two adjacent gas holding structures arbitrarily selected from the gas holding structures 41 to 45. Specifically, when the gas holding structures 41 and 43 are adjacent to each other, the gas holding structures 43 and 45 are adjacent to each other, the gas holding structures 45 and 44 are adjacent to each other, and the gas holding structures 44 and 42 are adjacent to each other, The positions of the gap 61 and the gap 63 in the front-rear direction X are shifted, the positions of the gap 63 and the gap 65 in the front-rear direction X are shifted, the positions of the gap 65 and the gap 64 in the front-rear direction X are shifted, and the gap 64 It is preferable that the position of the gap 62 in the front-rear direction X is shifted. For example, the plurality of gas holding plates 51, the plurality of gas holding plates 53, the plurality of gas holding plates 55, the plurality of gas holding plates 54, and the plurality of gas holding plates 52 are arranged in a staggered arrangement. Since the position of the gap in the front-rear direction X is shifted between two gas holding structures adjacent to each other, the movement of the bubble 70 in the left-right direction Y is further limited.

以上、気体保持構造４１及び４２に加えて３つの気体保持構造が設けられる場合を説明したが、気体保持構造４１及び４２に加えて少なくとも一つの気体保持構造が設けられてもよい。   Although the case where three gas holding structures are provided in addition to the gas holding structures 41 and 42 has been described above, at least one gas holding structure may be provided in addition to the gas holding structures 41 and 42.

なお、上記実施形態どうしを組み合わせることが可能である。例えば、気体保持板５３乃至５５のエッジにＲ又は傾斜を形成することが可能である。   In addition, it is possible to combine the said embodiment. For example, it is possible to form R or an inclination on the edges of the gas holding plates 53 to 55.

１…船底部
２…気体室
５…気体保持板
１０…船体
１１…船首
１２…船尾
１３…船底
１３ａ…左舷側縁部
１３ｂ…右舷側縁部
１４…左舷
１５…右舷
１６…プロペラ
１７…舵
２０…抵抗低減装置
３０…空気吹き出し装置
３１…空気吹き出し口
３２…コンプレッサ又はブロワ
４１〜４５…気体保持構造
５１〜５５…気体保持板
５１ａ…前方側エッジ
５１ｂ…後方側エッジ
６１〜６５…隙間
７０…気泡
８０…応力集中領域
Ｘ…前後方向
Ｙ…左右方向 DESCRIPTION OF SYMBOLS 1 ... Ship bottom part 2 ... Gas chamber 5 ... Gas holding plate 10 ... Hull 11 ... Bow 12 ... Stern 13 ... Ship bottom 13a ... Starboard side edge 13b ... Starboard side edge 14 ... Port 15 ... Starboard 16 ... Propeller 17 ... Rudder 20 ... Resistance reducing device 30 ... Air blowing device 31 ... Air blowing port 32 ... Compressor or blower 41-45 ... Gas holding structure 51-55 ... Gas holding plate 51a ... Front side edge 51b ... Rear side edge 61-65 ... Gap 70 ... Bubble 80 ... Stress concentration region X ... Front-back direction Y ... Left-right direction

Claims (5)

船体の船底に設けられた空気吹き出し口から空気を吹き出す空気吹き出し装置と、
前記船底に設けられた複数の気体保持構造と
を具備し、
前記複数の気体保持構造の各々は、前記船体の前後方向に沿って配列された複数の気体保持板を備え、
前記複数の気体保持板の隣り合う２つは、前記前後方向に隙間が設けられるように配列され、
前記複数の気体保持構造は、
前記船底の左舷側縁部分に配置された第１気体保持構造と、
前記船底の右舷側縁部分に配置された第２気体保持構造と、
前記船体の前記船底の前記前後方向の中央線と前記第１気体保持構造との間に配置された第３気体保持構造と、
前記船体の前記船底の前記前後方向の中央線と前記第２気体保持構造との間に配置された第４気体保持構造と
を含む
船舶の抵抗低減装置。 An air blowing device for blowing out air from an air blowing port provided on the bottom of the hull;
A plurality of gas holding structures provided on the ship bottom;
Each of the plurality of gas holding structures includes a plurality of gas holding plates arranged along the front-rear direction of the hull,
Two adjacent gas holding plates are arranged so that a gap is provided in the front-rear direction,
The plurality of gas holding structures are:
A first gas holding structure disposed on a port side edge portion of the ship bottom;
A second gas holding structure disposed on a starboard side edge portion of the ship bottom ;
A third gas holding structure disposed between the front-rear center line of the hull of the hull and the first gas holding structure;
A ship resistance reduction device, comprising: a fourth gas holding structure disposed between the center line in the longitudinal direction of the ship bottom of the hull and the second gas holding structure . 前記第１気体保持構造における前記複数の気体保持板の前記隙間と前記第３気体保持構造における前記複数の気体保持板の前記隙間とは、前記前後方向の位置がずれており、
前記第２気体保持構造における前記複数の気体保持板の前記隙間と前記第４気体保持構造における前記複数の気体保持板の前記隙間とは、前記前後方向の位置がずれている
請求項１の船舶の抵抗低減装置。 The gap between the plurality of gas holding plates in the first gas holding structure and the gap between the plurality of gas holding plates in the third gas holding structure are shifted in the front-rear direction,
The ship in the front-rear direction is deviated from the gap between the plurality of gas holding plates in the second gas holding structure and the gap between the plurality of gas holding plates in the fourth gas holding structure. Resistance reduction device. 前記複数の気体保持構造の数が３以上であり、
前記複数の気体保持構造は、前記船体の左右方向に等間隔に配置された
請求項１の船舶の抵抗低減装置。 The number of the plurality of gas holding structures is 3 or more;
The ship resistance reduction device according to claim 1, wherein the plurality of gas holding structures are arranged at equal intervals in a horizontal direction of the hull. 前記複数の気体保持構造から任意に選択される互いに隣り合う二つの気体保持構造のうちの一方側気体保持構造における前記複数の気体保持板の前記隙間と前記二つの気体保持構造のうちの他方側気体保持構造における前記複数の気体保持板の前記隙間とは、前記前後方向の位置がずれている
請求項３の船舶の抵抗低減装置。 The gap of the plurality of gas holding plates and the other side of the two gas holding structures in one side gas holding structure among two gas holding structures adjacent to each other arbitrarily selected from the plurality of gas holding structures The ship resistance reduction device according to claim 3, wherein the position in the front-rear direction is shifted from the gap between the plurality of gas holding plates in the gas holding structure. 前記複数の気体保持板の各々は、
Ｒ又は傾斜が形成された前方側エッジと、
Ｒ又は傾斜が形成された後方側エッジと
を備える
請求項１乃至４のいずれかに記載の船舶の抵抗低減装置。 Each of the plurality of gas holding plates is
A front edge formed with an R or slope;
The ship's resistance reduction device according to any one of claims 1 to 4, further comprising R or a rear side edge formed with an inclination.
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