JPH07277267A - Ship equipped with frictional resistance reducer - Google Patents
Ship equipped with frictional resistance reducerInfo
- Publication number
- JPH07277267A JPH07277267A JP6090605A JP9060594A JPH07277267A JP H07277267 A JPH07277267 A JP H07277267A JP 6090605 A JP6090605 A JP 6090605A JP 9060594 A JP9060594 A JP 9060594A JP H07277267 A JPH07277267 A JP H07277267A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- frictional resistance
- ship
- hull
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、船舶（水中航走体を含
む。）の接水外板面の改良に関し、同外板面に船体の摩
擦抵抗を低減させる溝を含んだ装置を付設される船舶に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-contacting outer plate surface of a ship (including an underwater vehicle), which is provided with a device including a groove for reducing frictional resistance of the hull. Related to ships.
【０００２】[0002]
【従来の技術】従来の摩擦抵抗低減装置付き船舶として
は図６（側面図）および図７（底面図）に示すようなも
のがあり、船体１の前部や中間部で水面10の下方に設け
られた多孔性部材７ａ，７ｂ，７ｃ，７ｄより吐出され
る気泡が、船体外板８の大部分を覆うように、同外板８
には船体の進行方向に沿って多数の溝６ａ，６ｂが設け
られている。なお、図中の符号２はプロペラを示し、３
は舵を示す。2. Description of the Related Art As a conventional ship with a frictional resistance reducing device, there is a ship as shown in FIG. 6 (side view) and FIG. 7 (bottom view). Air bubbles discharged from the provided porous members 7a, 7b, 7c, 7d so that most of the hull skin 8 is covered therewith.
A large number of grooves 6a and 6b are provided in the boat along the traveling direction of the hull. In the figure, reference numeral 2 indicates a propeller and 3
Indicates the rudder.
【０００３】[0003]
【発明が解決しようとする課題】船体の摩擦抵抗を低減
するためには、船体外板と水（海水または淡水）との接
触面積を減らすように、空気層で水面下の船体外板を覆
うことが効果的である。しかしながら、前述のような従
来の摩擦抵抗低減装置付き船舶では、船体外板に添う空
気は次々に流されていくので、空気層を定常的に保持す
るためには、大量の空気を絶えず供給し続けなければな
らず、このため経済的なメリットが消失してしまうとい
う不具合がある。In order to reduce the frictional resistance of the hull, an air layer covers the hull skin below the water surface so that the contact area between the hull skin and water (seawater or fresh water) is reduced. Is effective. However, in the conventional ship with a frictional resistance reduction device as described above, the air along the outer plate of the hull is flowed one after another, so in order to constantly maintain the air layer, a large amount of air is constantly supplied. There is a problem that the economic merit disappears because of the need to continue.
【０００４】本発明は、このような問題点の解消をはか
ろうとするもので、空気層で覆われる水面下の船体外板
面積をできるだけ大きくとれるようにするとともに、空
気の流出を最小限に抑制できるように、船体外板の外面
形状を改良した、摩擦抵抗低減装置付き船舶を提供する
ことを目的とする。The present invention is intended to solve such a problem, and makes it possible to maximize the area under the water surface of the hull covered with an air layer and to minimize the outflow of air. An object of the present invention is to provide a ship with a frictional resistance reduction device, in which the outer surface shape of the hull outer plate is improved so as to be suppressed.
【０００５】[0005]
【課題を解決するための手段】前述の目的を達成するた
め、本発明の摩擦抵抗低減装置付き船舶は、水面下の船
体外板の外面に 船体の進行方向と直角をなすように配
置された多数の互いに平行な溝をそなえるとともに、こ
れらの溝に空気供給用配管が接続されたことを特徴とし
ている。In order to achieve the above-mentioned object, the ship with a frictional resistance reducing device of the present invention is arranged on the outer surface of the hull skin plate under the water surface so as to be perpendicular to the traveling direction of the hull. It is characterized in that it has a large number of parallel grooves and that air supply pipes are connected to these grooves.
【０００６】また本発明の摩擦抵抗低減装置付き船舶
は、上記溝の断面形状が、同溝内への空気の滞留を助長
すべく、少なくとも下流側の溝内後端面と溝内底面との
なす角を鋭角に設定されていることを特徴としている。Further, in the marine vessel with a frictional resistance reducing device of the present invention, the cross-sectional shape of the groove is formed by at least the rear end surface inside the groove and the bottom surface inside the groove so as to promote the retention of air in the groove. The feature is that the angle is set to an acute angle.
【０００７】さらに本発明の摩擦抵抗低減装置付き船舶
は、上記溝の断面形状が、上流側の溝内前端面の高さを
下流側の溝内後端面の高さよりも大きく設定されている
ことを特徴としている。Further, in the ship with a frictional resistance reducing device of the present invention, the cross-sectional shape of the groove is set so that the height of the front end surface in the groove on the upstream side is larger than the height of the rear end surface in the groove on the downstream side. Is characterized by.
【０００８】また本発明の摩擦抵抗低減装置付き船舶
は、上記溝の断面形状が、下流側のエッジ部分に丸味を
つけられていることを特徴としている。Further, the marine vessel with a frictional resistance reducing device of the present invention is characterized in that the cross-sectional shape of the groove is rounded at the downstream edge portion.
【０００９】[0009]
【作用】上述の本発明の摩擦抵抗低減装置付き船舶で
は、水面下の船体外板の外面において船体進行方向と直
角をなすように互いに平行に形成された多数の溝の内部
に、配管を通じて供給された空気が保留されるので、船
舶の航行時には実際に水と接する外板面が大幅に減少す
るようになり、これにより船体の摩擦抵抗が軽減される
ようになる。In the above-described ship with a frictional resistance reducing device of the present invention, the water is supplied through the pipes to the inside of a large number of grooves formed in parallel to each other on the outer surface of the hull outer plate under the water surface so as to be perpendicular to the hull traveling direction. Since the generated air is retained, the outer skin surface that actually contacts the water is greatly reduced during the navigation of the ship, which reduces the frictional resistance of the hull.
【００１０】また、上記溝の断面形状が下流側の溝内後
端面と溝内底面とのなす角を鋭角に設定されていると、
同溝の内部に供給された空気の滞留が助長されるように
なり、上記溝内からの空気の漏洩が少なくなるので、同
溝内へ配管を通じ補給すべき空気の量が減少するように
なる。Further, when the cross-sectional shape of the groove is set to an acute angle between the rear end surface inside the groove on the downstream side and the bottom surface inside the groove,
Since the retention of the air supplied to the inside of the groove is promoted and the leakage of air from the inside of the groove is reduced, the amount of air to be supplied through the pipe into the groove is reduced. .
【００１１】さらに、上記溝の断面形状が、上流側の溝
内前端面の高さを下流側の溝内後端面の高さよりも大き
く設定されることにより、溝内からの空気の漏洩を一層
少なくすることができ、これにより同溝内への空気の補
給量も一層少なくてすむようになる。また、上記溝の断
面形状が下流側のエッジ部分に丸味をつけられると、船
舶の前進時における船体抵抗の減少がもたらされるよう
になる。Further, the cross-sectional shape of the groove is set such that the height of the front end surface in the groove on the upstream side is set to be larger than the height of the rear end surface in the groove on the downstream side, so that air leakage from the groove is further improved. Therefore, the amount of air supplied to the groove can be further reduced. Further, if the cross-sectional shape of the groove is rounded at the downstream edge portion, the hull resistance at the time of forward movement of the ship is reduced.
【００１２】[0012]
【実施例】以下、図面により本発明の実施例について説
明すると、図１は本発明の一実施例としての摩擦抵抗低
減装置付き船舶を示す縦断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a ship with a frictional resistance reducing device as an embodiment of the present invention.
【００１３】図１に示すように、船体１の船尾には、図
示しないエンジンで駆動されるプロペラ２と、その後方
に配設された舵３とが装備されている。そしてプロペラ
２および舵３を用いて船舶の航行が行なわれるが、その
際、この船舶の接水面における船体摩擦抵抗を低減でき
るように、摩擦抵抗抵抗装置として、図１および図２に
示すごとく、水面10の下方で船底５や船側における船体
外板８の外面に船体１の進行方向と直角をなすように配
置された多数の互いに平行な溝６と、これらの溝６に接
続された空気供給用配管４とが設けられるほか、図１に
示すように同配管４に接続されたコンプレッサまたは圧
縮空気タンクのごとき空気供給源９が装備されている。As shown in FIG. 1, a stern of a hull 1 is equipped with a propeller 2 driven by an engine (not shown) and a rudder 3 arranged behind the propeller 2. The propeller 2 and the rudder 3 are used to navigate the vessel. At that time, as a frictional resistance device, as shown in FIGS. 1 and 2, as a hull frictional resistance on the water contact surface of the vessel, can be reduced. A large number of parallel grooves 6 arranged at right angles to the traveling direction of the hull 1 on the outer surface of the hull bottom 5 and the hull skin 8 on the ship side below the water surface 10, and the air supply connected to these grooves 6. In addition to the supply pipe 4, an air supply source 9 such as a compressor or a compressed air tank connected to the pipe 4 is provided as shown in FIG.
【００１４】本実施例の摩擦抵抗低減装置付き船舶は上
述のように構成されているので、水面下における船体外
板の外面に船体進行方向と直角をなすように互いに平行
に形成された多数の溝６の内部に、配管４を通じて供給
された空気が保留されるようになり、これにより船舶の
航行時には実際に水と接する外板面の面積が大幅に減少
するようになる。したがって船体の摩擦抵抗が著しく軽
減されるようになる。Since the marine vessel with the frictional resistance reducing device of this embodiment is constructed as described above, a large number of parallel vessels are formed on the outer surface of the hull skin plate below the water surface so as to be perpendicular to the traveling direction of the hull. The air supplied through the pipe 4 is retained inside the groove 6, so that the area of the outer plate surface which is actually in contact with water during the navigation of the ship is greatly reduced. Therefore, the frictional resistance of the hull is significantly reduced.
【００１５】また、溝６の断面形状が、図２に示すごと
く、下流側の溝内後端面と溝内底面とのなす角αを鋭角
に設定されていると、同溝６の内部に供給された空気の
滞留が助長されるようになり、溝６内からの空気の漏洩
が少なくなるので、同溝６内へ配管４を通じ補給すべき
空気の量が減少するようになる。なお、溝６の断面形状
が、図３に示すごとく、上流側の溝内前端面と溝内底面
とのなす角βも鋭角に設定されていると、溝６内の空気
の滞留が一層助長されるようになる。If the cross-sectional shape of the groove 6 is set to an acute angle α between the groove inner rear end surface and the groove inner bottom surface as shown in FIG. 2, the groove 6 is supplied into the groove 6. The accumulated air is promoted and the leakage of air from the groove 6 is reduced, so that the amount of air to be supplied into the groove 6 through the pipe 4 is reduced. If the cross-sectional shape of the groove 6 is set to an acute angle β between the groove inner front end surface and the groove inner bottom surface as shown in FIG. 3, the retention of air in the groove 6 is further promoted. Will be done.
【００１６】さらに、溝６の断面形状が、図４に示すよ
うに、上流側の溝内前端面の高さを下流側の溝内後端面
の高さよりも大きく設定されると、溝６内からの空気の
漏洩を著しく少なくすることができ、これにより同溝６
内への空気の補給量も一層少なくてすむようになる。Further, as shown in FIG. 4, when the height of the upstream front end surface of the groove 6 is set to be larger than the height of the downstream rear end surface of the groove 6, as shown in FIG. It is possible to remarkably reduce the leakage of air from the groove 6, which allows the groove 6
The amount of air supplied to the inside can be further reduced.
【００１７】また、溝６の断面形状が、図５に示すよう
に、下流側のエッジ部分６ａに丸味をつけられると、船
体の前進時にエッジ部分６ａへの水の当たりが緩和され
るので、航行時の船体抵抗の減少をもたらす効果が得ら
れる。なお、上述の各例における溝６には、同溝６の内
部を適宜の区画に仕切るように、船長方向の仕切壁を所
要の相互間隔で配置することが望ましい。As shown in FIG. 5, when the groove 6 has a rounded edge 6a on the downstream side, the contact of water with the edge 6a is reduced when the hull advances. The effect of reducing the hull resistance during navigation can be obtained. In the groove 6 in each of the above-mentioned examples, it is desirable to arrange partition walls in the ship length direction at a required mutual interval so as to partition the inside of the groove 6 into appropriate sections.
【００１８】[0018]
【発明の効果】以上詳述したように、本発明の摩擦抵抗
低減装置付き船舶によれば次のような効果が得られる。 (1) 水面下の船体外板の外面において船体進行方向と直
角をなすように互いに平行に形成された多数の溝の内部
に、配管を通じて供給された空気が保留されるので、船
舶の航行時には実際に水と接する外板面が大幅に減少す
るようになり、これにより船体の摩擦抵抗が著しく軽減
されるようになる。 (2) また、上記溝の断面形状が下流側の溝内後端面と溝
内底面とのなす角を鋭角に設定されると、同溝の内部に
供給された空気の滞留が助長されるようになり、上記溝
内からの空気の漏洩が少なくなるので、同溝内へ配管を
通じ補給すべき空気の量が減少するようになる。 (3) 上記溝の断面形状が、上流側の溝内前端面の高さを
下流側の溝内後端面の高さよりも大きく設定されると、
溝内からの空気の漏洩を一層少なくすることができ、こ
れにより同溝内への空気の補給量も一層少なくてすむよ
うになる。 (4) 上記溝の断面形状が下流側のエッジ部分に丸味をつ
けられると、船舶の前進時における船体抵抗の減少がも
たらされるようになる。As described in detail above, according to the ship with the frictional resistance reduction device of the present invention, the following effects can be obtained. (1) On the outer surface of the hull skin below the water surface, the air supplied through the pipes is retained inside a number of grooves that are formed parallel to each other at right angles to the direction of travel of the hull. Actually, the outer skin surface that comes into contact with water is greatly reduced, which significantly reduces the frictional resistance of the hull. (2) If the cross-sectional shape of the groove is set to an acute angle between the groove rear end surface and the groove inner bottom surface, the retention of the air supplied into the groove is promoted. As a result, the amount of air leaked from the groove is reduced, so that the amount of air to be supplied through the pipe into the groove is reduced. (3) When the cross-sectional shape of the groove is set so that the height of the front end surface inside the groove on the upstream side is set to be larger than the height of the rear end surface inside the groove on the downstream side,
It is possible to further reduce the leakage of air from the inside of the groove, so that the amount of air supplied to the inside of the groove can be further reduced. (4) When the cross-sectional shape of the groove is rounded at the downstream edge portion, the hull resistance during forward movement of the ship is reduced.
【図１】本発明の一実施例としての摩擦抵抗低減装置付
き船舶を模式的に示す縦断面図である。FIG. 1 is a vertical sectional view schematically showing a ship with a frictional resistance reduction device as an embodiment of the present invention.
【図２】図１の船舶の要部を拡大して示す縦断面図であ
る。FIG. 2 is a longitudinal sectional view showing an enlarged main part of the ship shown in FIG.
【図３】図２の要部の変形例を示す縦断面図である。FIG. 3 is a vertical cross-sectional view showing a modified example of the main part of FIG.
【図４】図２の要部の他の変形例を示す縦断面図であ
る。FIG. 4 is a vertical cross-sectional view showing another modified example of the main part of FIG.
【図５】図２の要部のさらに他の変形例を示す縦断面図
である。5 is a vertical cross-sectional view showing still another modified example of the main part of FIG.
【図６】従来の摩擦抵抗低減装置付き船舶の側面図であ
る。FIG. 6 is a side view of a conventional ship with a frictional resistance reduction device.
【図７】図６の摩擦抵抗低減装置付き船舶の底面図であ
る。FIG. 7 is a bottom view of the ship with the frictional resistance reduction device of FIG.
１ 船体 ２ プロペラ ３ 舵 ４ 配管 ５ 船底 ６ 溝 ６ａ 下流側のエッジ部分 ７ 多孔性部材 ８ 船体外板 ９ コンプレッサ，圧縮空気タンク等の空気供給源 10 水面 1 Hull 2 Propeller 3 Rudder 4 Piping 5 Ship Bottom 6 Groove 6a Downstream Edge 7 Porous Member 8 Hull Skin 9 Air Supply Source such as Compressor, Compressed Air Tank 10 Water Surface
Claims (4)
方向と直角をなすように配置された多数の互いに平行な
溝をそなえるとともに、これらの溝に空気供給用配管が
接続されたことを特徴とする、摩擦抵抗低減装置付き船
舶。1. An outer surface of a hull skin below the water surface is provided with a large number of parallel grooves arranged at right angles to the traveling direction of the hull, and an air supply pipe is connected to these grooves. A ship with a frictional resistance reduction device, characterized in that
船舶において、上記溝の断面形状が、同溝内への空気の
滞留を助長すべく、少なくとも下流側の溝内後端面と溝
内底面とのなす角を鋭角に設定されていることを特徴と
する、摩擦抵抗低減装置付き船舶。2. The ship with a frictional resistance reduction device according to claim 1, wherein the cross-sectional shape of the groove is at least the rear end surface inside the groove and the inside of the groove in order to promote retention of air in the groove. A ship with a frictional resistance reduction device, characterized in that an angle formed with the bottom surface is set to an acute angle.
装置付き船舶において、上記溝の断面形状が、上流側の
溝内前端面の高さを下流側の溝内後端面の高さよりも大
きく設定されていることを特徴とする、摩擦抵抗低減装
置付き船舶。3. The ship with a frictional resistance reduction device according to claim 1 or 2, wherein the groove has a cross-sectional shape in which a height of a front end surface of the groove on the upstream side is higher than a height of a rear end surface of the groove on the downstream side. A ship with a frictional resistance reduction device, which is characterized by being set large.
装置付き船舶において、上記溝の断面形状が、下流側の
エッジ部分に丸味をつけられていることを特徴とする、
摩擦抵抗低減装置付き船舶。4. The marine vessel with a frictional resistance reduction device according to claim 1, wherein the groove has a cross-sectional shape in which a downstream edge portion is rounded.
A ship with a friction resistance reduction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09060594A JP3322477B2 (en) | 1994-04-05 | 1994-04-05 | Ship with frictional resistance reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09060594A JP3322477B2 (en) | 1994-04-05 | 1994-04-05 | Ship with frictional resistance reduction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07277267A true JPH07277267A (en) | 1995-10-24 |
| JP3322477B2 JP3322477B2 (en) | 2002-09-09 |
Family
ID=14003115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09060594A Expired - Fee Related JP3322477B2 (en) | 1994-04-05 | 1994-04-05 | Ship with frictional resistance reduction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3322477B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6237522B1 (en) | 1999-03-23 | 2001-05-29 | Kawasaki Jukogyo Kabushiki Kaisha | Bottom structure of personal watercraft |
| CN108082388A (en) * | 2017-11-30 | 2018-05-29 | 中国船舶工业系统工程研究院 | A kind of micro-nano structure and the modified mutually compound bionic, drag-reducing surface texture of hydrophobic modification |
| KR20200088677A (en) * | 2019-01-15 | 2020-07-23 | 포항공과대학교 산학협력단 | Under water structure with low drag anti-fouling technology inspired by mucus secretion structure of sea creature |
| KR20200088678A (en) * | 2019-01-15 | 2020-07-23 | 포항공과대학교 산학협력단 | Underwater surface structure with feather structure of cormorant and underwater structure comprising thereof |
| CN115848555A (en) * | 2022-12-14 | 2023-03-28 | 中船重工（上海）节能技术发展有限公司 | Jet-propelled subassembly and boats and ships of stabilizing at bottom of ship |
-
1994
- 1994-04-05 JP JP09060594A patent/JP3322477B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6237522B1 (en) | 1999-03-23 | 2001-05-29 | Kawasaki Jukogyo Kabushiki Kaisha | Bottom structure of personal watercraft |
| CN108082388A (en) * | 2017-11-30 | 2018-05-29 | 中国船舶工业系统工程研究院 | A kind of micro-nano structure and the modified mutually compound bionic, drag-reducing surface texture of hydrophobic modification |
| KR20200088677A (en) * | 2019-01-15 | 2020-07-23 | 포항공과대학교 산학협력단 | Under water structure with low drag anti-fouling technology inspired by mucus secretion structure of sea creature |
| KR20200088678A (en) * | 2019-01-15 | 2020-07-23 | 포항공과대학교 산학협력단 | Underwater surface structure with feather structure of cormorant and underwater structure comprising thereof |
| CN115848555A (en) * | 2022-12-14 | 2023-03-28 | 中船重工（上海）节能技术发展有限公司 | Jet-propelled subassembly and boats and ships of stabilizing at bottom of ship |
| CN115848555B (en) * | 2022-12-14 | 2024-03-01 | 中船(上海)节能技术有限公司 | Bottom jet stabilization assembly and ship |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3322477B2 (en) | 2002-09-09 |
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