JP5330803B2 - Ship wind resistance reduction structure - Google Patents

Ship wind resistance reduction structure Download PDF

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JP5330803B2
JP5330803B2 JP2008284523A JP2008284523A JP5330803B2 JP 5330803 B2 JP5330803 B2 JP 5330803B2 JP 2008284523 A JP2008284523 A JP 2008284523A JP 2008284523 A JP2008284523 A JP 2008284523A JP 5330803 B2 JP5330803 B2 JP 5330803B2
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residential area
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uppermost
wind pressure
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洋介 中村
貞人 杉山
孝行 竹山
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Mitsubishi Heavy Industries Ltd
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Description

本発明は、船舶の甲板上前方に設けられた多層の居住区に対して、その前面への風圧抵抗を低減するようにした船舶の風圧抵抗低減構造に関する。   The present invention relates to a wind pressure resistance reducing structure for a ship that reduces the wind pressure resistance to the front surface of a multi-layered residential area provided forward on the deck of the ship.

船舶においては、船体の甲板上に操舵室や船員の居室等が配置された居住区が設けられている。図９に示すように、例えば自動車運搬船１においては、この居住区１０が船体の前方、即ち船首３側の甲板２上に配置されている。居住区１０は階段状に多層構造を有しており、図に示されるように２層構造の場合は、中間層居住区（２層目）１１と、その上方に配置された最上層居住区（３層目）１２とから構成される。ここで、甲板下方の船体を１層目と見なす。   In a ship, a residential area in which a wheelhouse, a sailor's room, etc. are arranged on the deck of the hull is provided. As shown in FIG. 9, for example, in the car carrier 1, the residential area 10 is arranged in front of the hull, that is, on the deck 2 on the bow 3 side. The residential area 10 has a multi-layer structure in a staircase shape, and as shown in the figure, in the case of a two-layer structure, the middle-layer residential area (second layer) 11 and the uppermost residential area disposed above it (Third layer) 12. Here, the hull below the deck is regarded as the first layer.

このように居住区１０が船体の前方に配置されている場合、図１０（ａ）に示すように、船首３付近から剥がれた空気流れＡ、Ｂが直接居住区１０に衝突し、風圧抵抗が増大してしまう。これは、船首部３から剥離した空気流れＡが２層目１１に大きく当たり、２層目上部から剥がれた空気流れＢがさらに３層目１２に当たって３層目上部で剥がれ、最上層居住区１２から上方に剥離する空気流れＣの剥離せん断層の幅ｄが大きくなるため、風圧抵抗の増大に繋がるものである。   When the residential area 10 is arranged in front of the hull in this way, as shown in FIG. 10A, the air flows A and B peeled off from the vicinity of the bow 3 directly collide with the residential area 10, and the wind pressure resistance is reduced. It will increase. This is because the air flow A peeled off from the bow 3 hits the second layer 11 greatly, and the air flow B peeled off from the upper part of the second layer hits the third layer 12 and peeled off at the upper part of the third layer. Since the width d of the peel shear layer of the air flow C that peels upward from the air increases, it leads to an increase in wind pressure resistance.

そのため、従来は船首３から剥離した流れが居住区１０に当たらないように、図９及び図１０（ｂ）、（ｃ）に示すように、船首部分に船首ウィンドスクリーン２０を設ける対策が採られていた。これは、例えば特許文献１（実開昭６０−７５１９３号公報）等に開示されている。また、特許文献２（実開昭６２−１２９３８７号公報）には、最上層全通甲板のガンネル部において、その長手方向の一部或いは全部が丸みをもつように形成された構成が開示されている。しかし、これはガンネル部自体に丸みを持たせているため、製造が容易ではなく、また既存の船舶に対しては導入が困難であった。
尚、図９は、従来における船首ウィンドスクリーンを備えた船舶の斜視図、図１０（ａ）は従来における船首ウィンドスクリーンを備えていない船舶の概略断面図、図１０（ｂ）、（ｃ）は従来における船首ウィンドスクリーンを備えた船舶の概略断面図である。 Therefore, conventionally, as shown in FIGS. 9, 10 (b) and 10 (c), measures have been taken to provide a bow windscreen 20 at the bow portion so that the flow separated from the bow 3 does not hit the residential area 10. It was. This is disclosed in, for example, Patent Document 1 (Japanese Utility Model Publication No. 60-75193). Further, Patent Document 2 (Japanese Utility Model Publication No. 62-129387) discloses a configuration in which a part or all of the longitudinal direction is rounded in the gunnel portion of the uppermost all deck plate. Yes. However, since the gunnel portion itself is rounded, it is not easy to manufacture and is difficult to introduce into existing ships.
9 is a perspective view of a ship provided with a conventional bow windscreen, FIG. 10A is a schematic cross-sectional view of a ship not provided with a conventional bow windscreen, and FIGS. 10B and 10C are views. It is a schematic sectional drawing of the ship provided with the bow window screen in the past.

居住区１０上方に流れを誘導するためには、図１０（ｂ）に示すように船首ウィンドスクリーン２０を高くすることが考えられる。この場合、船首部３から居住区上部にかけて、流れＡを大きく剥離させることで最上層１２上部へ風を流し、該最上層１２からの剥離せん断層の幅ｄが小さくなる。しかしながら、船首ウィンドスクリーン２０を高くすると、制作費の増加、居住区前方の視界をさえぎるといった問題が発生する。
一方、図１０（ｃ）に示すように船首ウィンドスクリーン２０を低く抑えると、船首部３から剥離した空気流れＡが２層目１１に当たる割合は小さくなるが、居住区１０の上方に流れを誘導することができなくなり、風圧抵抗の低減効果が小さくなるという問題があった。 In order to induce the flow above the residential area 10, it is conceivable to raise the bow windscreen 20 as shown in FIG. In this case, the flow A is largely separated from the bow portion 3 to the upper part of the residential area, whereby the wind flows to the upper part of the uppermost layer 12 and the width d of the exfoliated shear layer from the uppermost layer 12 becomes smaller. However, raising the bow windscreen 20 causes problems such as an increase in production costs and obstructing the field of view in front of the residential area.
On the other hand, if the bow windscreen 20 is kept low as shown in FIG. 10 (c), the rate at which the air flow A separated from the bow 3 hits the second layer 11 is reduced, but the flow is induced above the residential area 10. There is a problem that the effect of reducing the wind pressure resistance becomes small.

実開昭６０−７５１９３号公報Japanese Utility Model Publication No. 60-75193 実開昭６２−１２９３８７号公報Japanese Utility Model Publication No. 62-129387

上記したように、居住区への風圧抵抗を低減するために、船首ウィンドスクリーンを設ける構成のみでは風圧抵抗の低減効果は小さく、また船首ウィンドスクリーンの高さを高くした場合には制作費の増加、居住区前方の視界をさえぎるといった問題が発生する。
従って、本発明は上記従来技術の問題点に鑑み、多層居住区へ衝突した空気流れの剥離を調整する構成を備えることによって、居住区前面への風圧抵抗を確実に低減することができる船舶の風圧抵抗低減構造を提供することを目的とする。 As mentioned above, in order to reduce the wind pressure resistance to the residential area, the effect of reducing the wind pressure resistance is small only with the configuration provided with the bow windscreen, and the production cost increases when the height of the bow windscreen is increased. The problem of obstructing the field of vision in front of the residential area occurs.
Therefore, in view of the above-mentioned problems of the prior art, the present invention includes a ship that can reliably reduce the wind pressure resistance to the front of the residential area by providing a configuration that adjusts the separation of the air flow that has collided with the multilayer residential area. An object of the present invention is to provide a structure for reducing wind pressure resistance.

そこで、本発明はかかる課題を解決するために、船舶の甲板上前方に前面が階段状に形成された多層の居住区が設けられ、該居住区から離間してこれより前方に船首ウインドスクリーンが設けられ、該船首ウインドスクリーンにより前記居住区の前面への風圧抵抗を低減するようにした船舶の風圧抵抗低減構造において、
前記船首ウインドスクリーンは、前記居住区の上端よりも低く構成され、前記居住区のうち中間層居住区の前側上部には、該中間層居住区より上方に剥離する空気流れの剥離せん断層の幅を大きくするための中間層ウインドスクリーンが設けられているとともに、前記船首ウインドスクリーンは、前記中間層居住区の上端よりも低く構成され、さらに、前記多層の居住区は、前記中間層居住区の上方に最上層居住区を有し、該最上層居住区は前面に、該最上層居住区より上方に剥離する空気流れの剥離せん断層の幅を小さくする最上層風圧低減手段を設け、該最上層風圧低減手段は、最上層居住区の前面上方から船舶進行方向に水平に突出して形成された水平プレートによって構成され、
該水平プレートは、前記中間層ウインドスクリーンに衝突してから最上層居住区へ衝突する空気流に対して水平プレートの上方に定在渦を発生させるように構成されたことを特徴とする。 Therefore, in order to solve the above problems, the present invention is provided with a multi-layered residential area whose front surface is formed in a stepped shape on the front side of the ship's deck, and is separated from the residential area and has a bow windscreen in front of it. In the structure for reducing wind pressure resistance of a ship provided to reduce wind pressure resistance to the front of the residential area by the bow windscreen,
The bow windscreen is configured to be lower than the upper end of the residential area, and the width of the shear layer of the air flow that peels upward from the intermediate residential area is formed in the upper front portion of the intermediate residential area among the residential areas. And the bow windscreen is configured to be lower than the upper end of the middle-layer residence area, and the multi-layer residence area is formed of the middle-layer residence area. An uppermost residential area is provided above, and the uppermost residential area is provided with an uppermost wind pressure reducing means for reducing the width of the peeling shear layer of the air flow separating upward from the uppermost residential area. The upper wind pressure reducing means is constituted by a horizontal plate that protrudes horizontally from the upper front of the uppermost residential area in the ship traveling direction,
The horizontal plate is configured to generate a standing vortex above the horizontal plate with respect to the air flow that collides with the intermediate layer wind screen and then collides with the uppermost layer residential area .

本発明によれば、居住区よりも高さの低い船首ウインドスクリーンを備えるとともに、中間層居住区の前側上部に中間層ウィンドスクリーンを設けることにより、中間層からの空気流れの剥離を大きくし、最上層居住区より上方に風を流し、最上層からの剥離せん断層の幅を小さくすることにより、居住区前面への風圧抵抗を確実に低減することが可能となる。尚、前記居住区のうち、前記中間層居住区とは、最上層に位置する居住区を除く居住区を全て含み、前記最上層居住区とは最上層に位置する居住区をいう。また、本発明において、前記船首ウインドスクリーンは、中間層居住区上端より低い高さとすることが好ましい。   According to the present invention, it is provided with a bow windscreen having a height lower than that of the residential area, and by providing an intermediate layer windscreen on the upper front side of the intermediate layer residential area, the separation of the air flow from the intermediate layer is increased, By flowing the wind above the uppermost residential area and reducing the width of the peeling shear layer from the uppermost layer, it is possible to reliably reduce the wind pressure resistance to the front of the residential area. Of the residential districts, the middle-tier residential district includes all residential districts excluding the residential district located in the uppermost layer, and the uppermost residential district refers to the residential district located in the uppermost layer. Moreover, in this invention, it is preferable that the said bow windscreen is made into the height lower than the upper end of the middle class residence area.

また、前記居住区のうち最上層居住区の前面には、該最上層居住区より上方に剥離する空気流れの剥離せん断層の幅を小さくする最上層風圧低減手段が設けられていることを特徴とする。
これは、前記中間層ウィンドスクリーンにより大部分の空気流れは最上層居住区より上方へ流れるが、最上層居住区前面に衝突する空気流れも存在するため、この空気流れを最上層風圧低減手段により最上層より上方へ導き、最上層居住区からの剥離せん断層の幅を小さくすることにより、風圧抵抗をより一層低減することが可能となる。 In addition, the front surface of the uppermost residential area among the residential areas is provided with an uppermost wind pressure reducing means for reducing the width of the peeling shear layer of the air flow that peels upward from the uppermost residential area. And
This is because most of the airflow flows upward from the uppermost residential area due to the intermediate layer windscreen, but there is also an airflow that collides with the front of the uppermost residential area, so this airflow is reduced by the uppermost wind pressure reducing means. Wind pressure resistance can be further reduced by leading upward from the uppermost layer and reducing the width of the peeling shear layer from the uppermost residential area.

さらに、前記最上層風圧低減手段が、該最上層居住区の前面上部に設けられた水平プレートであることを特徴とする。
このように、最上層居住区の前面上部に水平プレートを設置することにより、該水平プレートの上方に小さな螺旋状の定在渦が発生し、この定在渦に中間層ウィンドスクリーンからの空気流れが引き寄せられ、最上層からの剥離せん断層の幅を小さくすることができる。従って、居住区前面への風圧抵抗を確実に低減することが可能となる。 Further, the uppermost layer wind pressure reducing means is a horizontal plate provided in the upper part of the front surface of the uppermost layer residential area.
Thus, by installing a horizontal plate at the upper front of the uppermost residential area, a small spiral standing vortex is generated above the horizontal plate, and the air flow from the intermediate layer windscreen is generated in this standing vortex. Can be drawn, and the width of the peeling shear layer from the uppermost layer can be reduced. Therefore, it is possible to reliably reduce the wind pressure resistance to the front of the residential area.

以上記載のごとく本発明によれば、居住区よりも高さの低い船首ウインドスクリーンを備えるとともに、中間層居住区の前側上部に中間層ウィンドスクリーンを設けることにより、中間層からの空気流れの剥離を大きくし、最上層居住区より上方に風を流し、最上層居住区からの剥離せん断層の幅を小さくすることにより、最上層からの剥離幅を狭めることが可能となり、居住区前面への風圧抵抗を確実に低減することが可能となる。
また、最上層居住区に最上層風圧低減手段を設けることにより、最上層居住区へ衝突する空気流れを最上層より上方に導き、最上層居住区からの剥離せん断層の幅を小さくすることができ、風圧抵抗をより一層低減することが可能となる。 As described above, according to the present invention, the wind flow screen is separated from the intermediate layer by providing the bow windscreen having a height lower than that of the residential area and by providing the intermediate layer wind screen at the upper front of the intermediate layer residential area. It is possible to reduce the width of peeling from the top layer by reducing the width of the peeling shear layer from the top layer living area by increasing the wind and flowing the wind above the top layer living area. Wind pressure resistance can be reliably reduced.
In addition, by providing the highest layer wind pressure reducing means in the uppermost layer residential area, it is possible to guide the air flow that collides with the uppermost layer residential area above the uppermost layer and to reduce the width of the peeling shear layer from the uppermost layer residential area. It is possible to further reduce the wind pressure resistance.

さらに、前記最上層風圧低減手段を水平プレートとすることにより、該水平プレートの上方に小さな螺旋状の定在渦が発生し、この定在渦に中間層ウィンドスクリーンからの空気流れが引き寄せられ、最上層からの剥離せん断層の幅を小さくすることができ、居住区前面への風圧抵抗を確実に低減することが可能となる。 Furthermore, by making the uppermost wind pressure reducing means a horizontal plate, a small spiral standing vortex is generated above the horizontal plate, and the air flow from the intermediate layer wind screen is drawn to the standing vortex, it is possible to reduce the width of the separated shear layer from the uppermost layer, it is possible to reliably reduce the wind resistance of the residents ku front.

以下、図面を参照して本発明の好適な実施例を例示的に詳しく説明する。但しこの実施例に記載されている構成部品の寸法、材質、形状、その相対的配置等は特に特定的な記載がない限りは、この発明の範囲をそれに限定する趣旨ではなく、単なる説明例に過ぎない。   Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

（基本構成）
図１及び図２を参照して、本発明の基本構成に係る風圧抵抗低減構造につき説明する。図１は、本発明の基本構成に係る中間層ウィンドスクリーンを備えた船舶の斜視図、図２は本発明の基本構成に係る中間層ウィンドスクリーンを備えた船舶の概略断面図である。
これらの図に示すように、船舶１の船首３側の甲板２上には居住区１０が設けられている。該居住区１０は階段状の多層構造を有しており、２層目（中間層居住区）１１の上方に３層目（最上層居住区）１２が配置されている。尚、ここでは甲板下方の船体を１層目と見なし、２段構造（３層構造）の居住区１０を例に挙げて説明する。 ( Basic configuration )
With reference to FIG.1 and FIG.2, it demonstrates about the wind-pressure-resistance reduction structure which concerns on the basic composition of this invention. 1, the intermediate layer perspective of a ship equipped with a windscreen diagram of the basic configuration of the present invention, FIG. 2 is a schematic cross-sectional view of a vessel provided with an intermediate layer windscreen according to the basic configuration of the present invention.
As shown in these drawings, a residential area 10 is provided on the deck 2 on the bow 3 side of the ship 1. The residential area 10 has a stepped multilayer structure, and a third layer (uppermost residential area) 12 is disposed above the second layer (intermediate residential area) 11. Here, the hull below the deck is regarded as the first layer, and a two-tiered (three-layered) residential area 10 will be described as an example.

前記船首３には、船体の形状に沿った壁状の船首ウィンドスクリーン２０が設けられている。該船首ウィンドスクリーン２０は、居住区１０の最上端よりもその高さが低く構成されている。好適には、前記船首ウインドスクリーン２０は、中間層居住区１１の上端より低い高さとする。
また、中間層居住区１１の前側上部には、中間層ウィンドスクリーン２１が設けられている。該中間層ウインドスクリーン２１は、船舶１の進行方向に対して垂直に立設された壁状に形成され、図示されるようにその前面は、下部が前方に且つ上部が後方に位置するように傾斜されている。尚、該中間層ウインドスクリーン２１は、平板状であってもよいし、或いは船首３に沿うように弓状であってもよい。 The bow 3 is provided with a wall-like bow windscreen 20 along the shape of the hull. The bow windscreen 20 is configured to be lower than the uppermost end of the living area 10. Preferably, the bow windscreen 20 has a height lower than the upper end of the mid-story residential area 11.
Further, an intermediate layer wind screen 21 is provided at the upper front side of the intermediate layer residential area 11. The intermediate windscreen 21 is formed in the shape of a wall erected perpendicularly to the traveling direction of the ship 1, and as shown in the drawing, the front surface thereof is positioned so that the lower part is on the front and the upper part is on the rear. It is inclined. The intermediate windscreen 21 may have a flat plate shape or may have a bow shape along the bow 3.

このような構成を備える風圧抵抗低減構造においては、船首ウィンドスクリーン２０から剥離した空気流れＡは中間層ウィンドスクリーン２１に衝突し、該中間層ウィンドスクリーン２１により空気流れＢが大きく剥離して最上層居住区１２より上方へ風が流れる。従って、最上層居住区１２からの剥離せん断層の幅ｄを狭めることが可能となり、居住区１０前面への風圧抵抗を確実に低減することが可能となる。   In the wind pressure resistance reducing structure having such a configuration, the air flow A separated from the bow wind screen 20 collides with the intermediate layer wind screen 21, and the air flow B is largely separated by the intermediate layer wind screen 21, and the uppermost layer. The wind flows upward from the residential area 12. Accordingly, the width d of the peeling shear layer from the uppermost residential area 12 can be reduced, and the wind pressure resistance to the front surface of the residential area 10 can be reliably reduced.

図３に、図２に示した基本構成を応用させた図を示す。この応用例では、３段構造（甲板下方の船体を含め４層構造）の居住区１０とした場合である。該居住区１０は、下から２層目（中間層居住区）１１ａと、３層目（中間層居住区）１１ｂと、４層目（最上層居住区）１２とから構成される。
このうち、少なくとも何れかの中間層の前側上部に中間層ウィンドスクリーン２１を設ける。図３では一例として、全ての中間層１１ａ、１１ｂに中間層ウィンドスクリーン２１ａ、２１ｂを設けた構成を示している。
このように、中間層が複数段存在する場合には、少なくとも何れかの中間層に中間層ウィンドスクリーン２１を設けることにより、居住区１０前面への風圧抵抗を確実に低減することが可能となる。好適には、船首ウィンドスクリーン２０から剥離した空気流れＡが衝突する中間層に中間層ウィンドスクリーン２１を設けるとよい。 FIG. 3 shows a diagram in which the basic configuration shown in FIG. 2 is applied. In this application example, the residential area 10 has a three-stage structure (a four-layer structure including the hull below the deck). The residential area 10 includes a second layer (intermediate residential area) 11a, a third layer (intermediate residential area) 11b, and a fourth layer (uppermost residential area) 12 from the bottom.
Among these, the intermediate layer wind screen 21 is provided on the upper front side of at least one of the intermediate layers. As an example, FIG. 3 shows a configuration in which intermediate layer wind screens 21a and 21b are provided in all intermediate layers 11a and 11b.
As described above, when there are a plurality of intermediate layers, it is possible to reliably reduce the wind pressure resistance to the front surface of the residential area 10 by providing the intermediate layer wind screen 21 in at least one of the intermediate layers. . Preferably, an intermediate layer wind screen 21 is provided in an intermediate layer where the air flow A separated from the bow wind screen 20 collides.

（実施形態）
図４は本発明の実施形態に係る風圧抵抗低減手段を備えた船舶の概略断面図である。尚、本実施形態において、上記した基本構成と同一の構成についてはその詳細な説明を省略する。
本実施形態では、最上層居住区１２に風圧抵抗低減手段を備えた構成としている。図４では、風圧抵抗低減手段として、最上層居住区１２の前面上方に水平プレート３０を配置した構成としている。該水平プレート３０は、最上層居住区１２の前面上方から船舶進行方向に突出した構成となっており、突出長さは任意である。またその幅は、居住区１０の幅と同一であることが好ましい。 ( Embodiment )
FIG. 4 is a schematic sectional view of a ship provided with wind pressure resistance reducing means according to an embodiment of the present invention. In the present embodiment , detailed description of the same configuration as the basic configuration described above is omitted.
In this embodiment, it is set as the structure provided with the wind pressure resistance reduction means in the uppermost-layer residence area 12. FIG. In FIG. 4, as a wind pressure resistance reducing means, a horizontal plate 30 is arranged above the front surface of the uppermost residential area 12. The horizontal plate 30 is configured to protrude in the ship traveling direction from above the front surface of the uppermost residential area 12, and the protruding length is arbitrary. The width is preferably the same as the width of the residential area 10.

このような構成を備える風圧抵抗低減構造においては、船首ウィンドスクリーン２０から剥離した空気流れＡは中間層ウィンドスクリーン（図示略）に衝突し、その大部分が最上層居住区１２より上方に流れるが、最上層居住区へ衝突する空気流れＢも存在し、この空気流れを水平プレート３０により最上層より上方へ導き、これによって最上層居住区１２からの剥離せん断層の幅ｄを小さくすることができ、より一層風圧抵抗を低減することが可能となる。
このとき、水平プレート３０の上方に小さな螺旋状の定在渦Ｄが発生するため、この定在渦Ｄに中間層ウィンドスクリーンからの空気流れが引き寄せられ、最上層からの剥離せん断層の幅ｄをより小さくすることができる。 In the wind pressure resistance reducing structure having such a configuration, the air flow A separated from the bow windscreen 20 collides with an intermediate windscreen (not shown), and most of the airflow A flows above the uppermost residential area 12. There is also an air flow B that impinges on the uppermost residential area, and this airflow is guided upward from the uppermost layer by the horizontal plate 30, thereby reducing the width d of the peeling shear layer from the uppermost residential area 12. It is possible to further reduce the wind pressure resistance.
At this time, since a small spiral standing vortex D is generated above the horizontal plate 30, the air flow from the intermediate layer windscreen is attracted to the standing vortex D, and the width d of the peeling shear layer from the uppermost layer. Can be made smaller.

図５に、図４に示した実施形態の参考例の図を示す。同図に示すように、この参考例では、水平プレート３０を設置せずに、最上層居住区１２の前面を切り欠いた傾斜部３１を設けた構成としている。
このように、最上層居住区１２の前面上部を切り欠いて傾斜させ、傾斜部３１を設けることにより、最上層居住区１２からの剥離せん断層の幅ｄを小さくすることができ、居住区前面への風圧抵抗を確実に低減することが可能となる。 FIG. 5 shows a reference example of the embodiment shown in FIG. As shown in the figure, in this reference example , the horizontal plate 30 is not installed, but the inclined portion 31 in which the front surface of the uppermost residential area 12 is cut out is provided.
As described above, the upper surface of the uppermost residential area 12 is notched and inclined, and the inclined portion 31 is provided, whereby the width d of the peeling shear layer from the uppermost residential area 12 can be reduced. It is possible to reliably reduce the wind pressure resistance.

（風圧試験）
図６に、本発明の基本構成及び実施形態の風圧抵抗低減構造を備えた船舶と、従来の船首ウィンドスクリーンのみ備えた船舶とを用いて、風圧試験を行った結果を示す。タイプＡは、居住区１０の前面が垂直である船舶、タイプＢは居住区１０のうち２層目の上方を傾斜させた船舶とした。また、何れも２層目と３層目からなる２段構造の居住区１０を備えた船舶とした。試験に用いた構成は、基本構成では図１及び図２に示す中間層ウィンドスクリーンを設けた構成、実施形態は図４に示す水平プレートを設けた構成である。
尚、Ｃｘは実測した風圧を示す数値である。比率は、従来例の風圧を１００％とした時の基本構成の風圧、実施形態の風圧の比を算出して示した。低減率は、従来例に対する基本構成、実施形態の風圧の低減率を示す。風向は、風向０°は正面からの風圧、３０°は斜め方向からの風圧を示す。 (Wind pressure test)
FIG. 6 shows the results of a wind pressure test using a ship provided with the wind pressure resistance reduction structure of the basic configuration and embodiment of the present invention and a ship provided only with a conventional bow windscreen. Type A was a ship in which the front of the residential area 10 was vertical, and Type B was a ship in which the upper part of the second layer of the residential area 10 was inclined. Moreover, it was set as the ship provided with the residential area 10 of the two-step structure which consists of the 2nd layer and the 3rd layer in all. And the configuration used in the test, composed of the basic structure in which an intermediate layer windscreen shown in FIGS. 1 and 2, the embodiment is a structure in which a horizontal plate shown in FIG.
Cx is a numerical value indicating the actually measured wind pressure. The ratio is shown by calculating the ratio between the wind pressure of the basic configuration when the wind pressure of the conventional example is 100% and the wind pressure of the embodiment . The reduction rate indicates the basic configuration of the conventional example, the reduction rate of the wind pressure of the embodiment . As for the wind direction, 0 ° indicates the wind pressure from the front, and 30 ° indicates the wind pressure from the oblique direction.

図６の試験結果を図７及び図８に示した。図７は従来例と基本構成とを比較したグラフ、図８は従来例と実施形態とを比較したグラフである。
この試験結果から、タイプＡにおいて、従来例に比べて基本構成では、正面からの風圧が４％減、斜め方向からの風圧が２％減と、大幅な風圧低減効果が得られた。従って、中間層ウィンドスクリーンを設けることによって、確実に風圧抵抗を低減することが可能であることがわかる。
また、タイプＢにおいて、従来例に比べて実施形態では、正面からの風圧が１％減、斜め方向からの風圧が１％減と、何れも風圧低減効果が得られた。従って、中間層ウィンドスクリーンに加えて、さらに水平プレートを設けることによって、より一層風圧抵抗を低減することが可能であることがわかる。 The test results of FIG. 6 are shown in FIGS. FIG. 7 is a graph comparing the conventional example with the basic configuration, and FIG. 8 is a graph comparing the conventional example with the embodiment .
From this test result, in Type A, the wind pressure from the front is reduced by 4% and the wind pressure from the oblique direction is reduced by 2% in the basic configuration as compared with the conventional example. Accordingly, it can be seen that the wind pressure resistance can be surely reduced by providing the intermediate layer wind screen.
Further, in Type B, the wind pressure from the front is reduced by 1% and the wind pressure from the oblique direction is reduced by 1% in the embodiment as compared with the conventional example. Therefore, it can be seen that the wind resistance can be further reduced by providing a horizontal plate in addition to the intermediate windscreen.

本発明は、多層居住区へ衝突した空気流れの剥離を調整する構成を備えることによって、居住区前面への風圧抵抗を確実に低減することができるため、自動車運搬船等のように船舶の甲板上前方に多層居住区が配置される船舶全般に好適に用いることができる。   Since the present invention can reduce the wind pressure resistance to the front of the residential area by adjusting the separation of the air flow that collided with the multi-layered residential area, it can be reliably reduced on the deck of a ship such as an automobile carrier. It can be suitably used for all ships where a multi-story residential area is arranged in front.

本発明の基本構成に係る中間層ウィンドスクリーンを備えた船舶の斜視図である。It is a perspective view of the ship provided with the intermediate | middle layer windscreen which concerns on the basic composition of this invention. 本発明の基本構成に係る中間層ウィンドスクリーンを備えた船舶の概略断面図である。It is a schematic sectional drawing of the ship provided with the intermediate | middle layer windscreen which concerns on the basic composition of this invention. 図２に示した基本構成を応用させた図である。It is the figure which applied the basic composition shown in FIG. 本発明の実施形態に係る風圧抵抗低減手段を備えた船舶の概略断面図である。It is a schematic sectional drawing of the ship provided with the wind pressure resistance reduction means which concerns on embodiment of this invention. 図４に示した実施形態を応用させた図である。It is the figure which applied the embodiment shown in FIG. 風圧試験の試験結果を示す表である。It is a table | surface which shows the test result of a wind pressure test. 図６の試験結果を示す図で、従来例と基本構成とを比較したグラフである。It is a figure which shows the test result of FIG. 6, and is the graph which compared the prior art example and the basic composition . 図６の試験結果を示す図で、従来例と実施形態とを比較したグラフである。It is a figure which shows the test result of FIG. 6, and is the graph which compared the prior art example and embodiment . 従来における船首ウィンドスクリーンを備えた船舶の斜視図である。It is a perspective view of the ship provided with the bow window screen in the past. 従来における船舶の概略断面図で、（ａ）は船首ウィンドスクリーンを備えていない場合、（ｂ）は高い船首ウィンドスクリーンを備えている場合、（ｃ）は低い船首ウィンドスクリーンを備えている場合である。FIG. 2 is a schematic cross-sectional view of a conventional ship, in which (a) does not include a bow windscreen, (b) includes a high bow windscreen, and (c) includes a low bow windscreen. is there.

１ 船舶
２ 甲板
３ 船首
１０ 居住区
１１ 中間層居住区
１２ 最上層居住区
２０ 船首ウィンドスクリーン
２１ 中間層ウィンドスクリーン
３０ 水平プレート
３１ 傾斜部 DESCRIPTION OF SYMBOLS 1 Ship 2 Deck 3 Bow 10 Residential area 11 Middle layer residential area 12 Top layer residential area 20 Bow wind screen 21 Middle layer wind screen 30 Horizontal plate 31 Inclined part

Claims (1)

船舶の甲板上前方に前面が階段状に形成された多層の居住区が設けられ、該居住区から離間してこれより前方に船首ウインドスクリーンが設けられ、該船首ウインドスクリーンにより前記居住区の前面への風圧抵抗を低減するようにした船舶の風圧抵抗低減構造において、
前記船首ウインドスクリーンは、前記居住区の上端よりも低く構成され、前記居住区のうち中間層居住区の前側上部には、該中間層居住区より上方に剥離する空気流れの剥離せん断層の幅を大きくするための中間層ウインドスクリーンが設けられているとともに、前記船首ウインドスクリーンは、前記中間層居住区の上端よりも低く構成され、さらに、前記多層の居住区は、前記中間層居住区の上方に最上層居住区を有し、該最上層居住区は前面に、該最上層居住区より上方に剥離する空気流れの剥離せん断層の幅を小さくする最上層風圧低減手段を設け、該最上層風圧低減手段は、最上層居住区の前面上方から船舶進行方向に水平に突出して形成された水平プレートによって構成され、
該水平プレートは、前記中間層ウインドスクリーンに衝突してから最上層居住区へ衝突する空気流に対して水平プレートの上方に定在渦を発生させるように構成されたことを特徴とする船舶の風圧抵抗低減構造。 A multi-layered residential area having a front surface formed in a stepped shape is provided in front of the deck of the ship, and a bow windscreen is provided in front of and spaced from the residential area. In the structure for reducing wind pressure resistance of a ship that reduces wind pressure resistance to
The bow windscreen is configured to be lower than the upper end of the residential area, and the width of the shear layer of the air flow that peels upward from the intermediate residential area is formed in the upper front portion of the intermediate residential area among the residential areas. And the bow windscreen is configured to be lower than the upper end of the middle-layer residence area , and the multi-layer residence area is formed of the middle-layer residence area. An uppermost residential area is provided above, and the uppermost residential area is provided with an uppermost wind pressure reducing means for reducing the width of the peeling shear layer of the air flow separating upward from the uppermost residential area. The upper wind pressure reducing means is constituted by a horizontal plate that protrudes horizontally from the upper front of the uppermost residential area in the ship traveling direction,
The horizontal plate is configured to generate a standing vortex above the horizontal plate with respect to the air flow that collides with the intermediate layer wind screen and then collides with the uppermost residential area. Wind pressure resistance reduction structure.
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