JP2001174364A - Method and device for testing free running model of vessel - Google Patents
Method and device for testing free running model of vesselInfo
- Publication number
- JP2001174364A JP2001174364A JP36289399A JP36289399A JP2001174364A JP 2001174364 A JP2001174364 A JP 2001174364A JP 36289399 A JP36289399 A JP 36289399A JP 36289399 A JP36289399 A JP 36289399A JP 2001174364 A JP2001174364 A JP 2001174364A
- Authority
- JP
- Japan
- Prior art keywords
- air nozzle
- compressed gas
- gas cylinder
- model
- thrust
- 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.)
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Links
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、船舶の自由航走模
型試験方法および装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for testing a free-running model of a ship.
【０００２】[0002]
【従来の技術】船体性能を推定するため種々の模型水槽
試験が行なわれている。自由航走模型試験を行なう際、
模型船と実船との相似則が成り立つことが必要である。
しかし、フルードの相似則に従って行なわれる自由航走
模型試験では、模型船の摩擦抵抗成分が縮尺影響のた
め、実船の摩擦抵抗より大きくなる。このため、推進プ
ロペラの荷重度は高くなり、過大な舵力が発生し、操縦
性能の推定精度が悪化してしまう。2. Description of the Related Art Various model tank tests have been conducted to estimate the performance of a hull. When conducting a free-running model test,
It is necessary that the similarity rules between the model ship and the actual ship hold.
However, in a free-running model test conducted in accordance with Froude's similarity rule, the frictional resistance component of the model ship is larger than the actual ship's frictional resistance due to the scale effect. For this reason, the load of the propulsion propeller becomes high, an excessive steering force is generated, and the estimation accuracy of the steering performance deteriorates.
【０００３】つまり、図３に概念を示すが実船に相当す
る船速を出すために、実船相当のプロペラ推力Ａに摩擦
抵抗増加分に相当する推力Ｂを加えた推力を推進プロペ
ラ２に発生させることになるから、舵３に流入する流速
が大きくなり、操舵したときの舵力がさらに過大とな
る。なお、１は模型船体である。[0003] In other words, the concept shown in FIG. 3 shows that in order to obtain a ship speed equivalent to that of an actual ship, a thrust obtained by adding a thrust A corresponding to an increase in frictional resistance to a propeller thrust A equivalent to an actual ship is applied to the propulsion propeller 2. Therefore, the flow velocity flowing into the rudder 3 increases, and the rudder force at the time of steering is further increased. 1 is a model hull.
【０００４】図４に示すごとく、模型船体１上に空中プ
ロペラ４を設け、摩擦抵抗増加分に相当する推力Ｂを発
生させ、推進プロペラ２には実船相当のプロペラ推力Ａ
を発生させるようにした摩擦抵抗修正の方法も知られて
いる。しかし、空中プロペラ４の推力は模型船体１に対
する後向きだけでなく、横方向の推力も発生するため、
特に、旋回時にはこれが大きく作用すると云う不都合が
あった。As shown in FIG. 4, an aerial propeller 4 is provided on a model hull 1 to generate a thrust B corresponding to an increase in frictional resistance, and a propeller thrust A equivalent to an actual ship is applied to a propulsion propeller 2.
There is also known a frictional resistance correcting method for generating the frictional force. However, the thrust of the aerial propeller 4 generates not only a backward thrust to the model hull 1 but also a lateral thrust.
In particular, there is an inconvenience that this acts greatly during turning.
【０００５】また、この場合、空中プロペラ４および該
空中プロペラ４の駆動装置５を含めたプロペラ装置を模
型船体１上に搭載しなければならず、その設置スペース
の問題および搭載重量による影響も考慮しなければなら
ず、あまり実用化されていない現状である。In this case, the propeller device including the aerial propeller 4 and the driving device 5 for the aerial propeller 4 must be mounted on the model hull 1, and the problem of the installation space and the influence of the mounting weight are taken into consideration. And it has not been put to practical use.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、摩擦抵抗修
正推力を、模型船体に対して真直ぐ後向きに発生でき、
摩擦抵抗修正推力の発生源を模型船体上に搭載しない自
由航走模型試験方法および装置を得ることを目的とす
る。SUMMARY OF THE INVENTION According to the present invention, a frictional resistance correcting thrust can be generated straight backward with respect to a model hull,
An object of the present invention is to obtain a free-running model test method and apparatus in which a source of a frictional resistance modified thrust is not mounted on a model hull.
【０００７】[0007]
【課題を解決するための手段】本発明は、模型船体上後
端部にエアノズルを取付け、該エアノズルに、計測台車
に積載した圧縮ガスボンベよりエアホースを通じて圧縮
ガスを送給し、摩擦抵抗増加分に相当する推力をエアノ
ズルから噴射するようにした。According to the present invention, an air nozzle is attached to a rear end of a model hull, and a compressed gas is supplied to the air nozzle from a compressed gas cylinder mounted on a measuring truck through an air hose to reduce the frictional resistance. Corresponding thrust was injected from the air nozzle.
【０００８】また、エアノズルは検力計を介して取付
け、圧縮ガスボンベには圧力調整弁を取付け、検力計に
よって模型船体に与えるエアノズルからの噴射反力を計
測し、これにより圧縮ガスボンベの圧力調整弁を調整し
て摩擦抵抗に相当する推力を補えるようにした。In addition, the air nozzle is mounted via a power meter, and a pressure adjusting valve is mounted on the compressed gas cylinder, and the reaction force from the air nozzle applied to the model hull is measured by the power meter, thereby adjusting the pressure of the compressed gas cylinder. The valve was adjusted to compensate for the thrust equivalent to frictional resistance.
【０００９】[0009]
【発明の実施の形態】以下図に沿って本発明の実施の形
態について説明する。図１は本発明による摩擦抵抗修正
の概念を示す図であり、図２は同装置の概略図である。
６はエアノズルであって、模型船体１の船尾部に検力計
７を介して取付けられている。検力計７はロードセル等
が用いられ、模型船体１に対するエアノズル６の反力を
計るものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing the concept of frictional resistance correction according to the present invention, and FIG. 2 is a schematic view of the same device.
Reference numeral 6 denotes an air nozzle, which is attached to the stern of the model hull 1 via a power meter 7. The force meter 7 uses a load cell or the like, and measures a reaction force of the air nozzle 6 with respect to the model hull 1.
【００１０】８は圧縮ガスボンベであつて、計測台車９
に積載され、エアホース１０により前記エアノズル６に
連結されている。計測台車９は、水槽を任意の方向（Ｘ
Ｙ方向）に走行可能に設置された台車である。この計測
台車９に諸種の計測機器が積み込まれ、模型船体１の航
走に追従しながら、走行するようになっている。Reference numeral 8 denotes a compressed gas cylinder, and a measuring cart 9
And is connected to the air nozzle 6 by an air hose 10. The measurement trolley 9 moves the water tank in any direction (X
(Y direction). Various measuring instruments are loaded on the measuring trolley 9 and run while following the running of the model hull 1.
【００１１】１１は、圧縮ガスボンベ８の出口に取付け
られた圧力調整弁であり、該圧力調整弁１１によりエア
ノズル６からの圧縮ガス噴出量が調整される。なお、圧
縮ガスとしては、圧縮空気あるいは圧縮窒素ガスが使用
される。Reference numeral 11 denotes a pressure adjusting valve attached to the outlet of the compressed gas cylinder 8, and the amount of compressed gas ejected from the air nozzle 6 is adjusted by the pressure adjusting valve 11. As the compressed gas, compressed air or compressed nitrogen gas is used.
【００１２】本発明の構成は以上の通りであって、以下
にその操作作用について説明する。まず、基本的には圧
縮ガスボンベ８よりエアノズル６に圧縮ガスを送給し、
これをエアノズル６から噴出させて、摩擦抵抗増加分に
相当する推力Ｂをエアノズル６に発生させるものであ
る。The configuration of the present invention is as described above, and the operation and operation thereof will be described below. First, the compressed gas is basically sent from the compressed gas cylinder 8 to the air nozzle 6,
This is ejected from the air nozzle 6 to generate a thrust B corresponding to the increase in frictional resistance in the air nozzle 6.
【００１３】摩擦抵抗増加分に相当する推力Ｂについて
は、当初模型船体１を固定した状態で圧縮ガスを噴出さ
せ、検力計７で、エアノズル６の模型船体１に対する反
力を計り、圧縮ガスボンベ８の圧力調整弁１１により圧
縮ガス噴出圧を調整し、予め計算で得ている摩擦抵抗増
加分に相当する推力に対応する噴出圧となったところ
で、圧力調整弁１１を固定する。With respect to the thrust B corresponding to the increase in frictional resistance, compressed gas is ejected while the model hull 1 is initially fixed, and the reaction force of the air nozzle 6 with respect to the model hull 1 is measured by a force meter 7 to obtain a compressed gas cylinder. The compressed gas ejection pressure is adjusted by the pressure adjustment valve 11 of FIG. 8, and when the ejection pressure corresponds to the thrust corresponding to the increased frictional resistance calculated in advance, the pressure adjustment valve 11 is fixed.
【００１４】この状態で模型船体１を航走させ、自由航
走模型試験を行なうことになる。従って、摩擦抵抗増加
分に相当する推力Ｂはエアノズル６に発生させて、摩擦
抵抗が修正されるから、推進プロペラ２には実船相当の
推力Ａが発生されればよいことになる。In this state, the model hull 1 is made to sail, and a free-running model test is performed. Therefore, the thrust B corresponding to the increase in the frictional resistance is generated in the air nozzle 6 and the frictional resistance is corrected, so that the thrust A equivalent to the actual ship needs to be generated in the propulsion propeller 2.
【００１５】また、計測台車９は模型船体１に追従しな
がら走行するので、エアホース１０は若干の撓みが有れ
ばよく、この重量も大部分が計測台車９に支持される。
模型船体１にはエアノズル６と検力計７が取付けられ、
それらの重量が付加されるだけである。Since the measuring cart 9 travels while following the model hull 1, the air hose 10 only needs to be slightly bent, and most of the weight is supported by the measuring cart 9.
An air nozzle 6 and a power meter 7 are attached to the model hull 1,
Only their weight is added.
【００１６】[0016]
【発明の効果】以上述べたごとく本発明によれば、模型
船体の上部後端に検力計を介してエアノズルを取付け、
該エアノズルに、計測台車に積載した圧縮ガスボンベよ
り圧縮ガスをエアホースを通して送給し、エアノズルよ
り摩擦抵抗増加分に相当する推力を噴出するようにした
ので、模型船体に対して後向きの真直ぐな摩擦抵抗修正
推力を発生させることができる。As described above, according to the present invention, an air nozzle is attached to the upper rear end of a model hull via a force meter.
Compressed gas is supplied to the air nozzle from a compressed gas cylinder loaded on a measuring cart through an air hose, and a thrust corresponding to an increase in frictional resistance is ejected from the air nozzle. A modified thrust can be generated.
【００１７】また、検力計によってエアノズルから模型
船体にかかる反力を計り、圧力調整弁の調整により、エ
アノズルからのガス噴出量を調整するようにしたので、
容易に摩擦抵抗増加分に相当する推力を補うことができ
る。さらに、圧縮ガスボンベを計測台車に積載したの
で、摩擦抵抗修正推力発生のための装置を搭載するスペ
ースの問題および積載重量による影響もなくなった。Also, the reaction force acting on the model hull from the air nozzle is measured by a power meter and the amount of gas ejected from the air nozzle is adjusted by adjusting the pressure adjusting valve.
The thrust corresponding to the increase in frictional resistance can be easily compensated. Further, since the compressed gas cylinder is loaded on the measuring cart, the problem of the space for mounting the device for generating the frictional resistance correcting thrust and the influence of the loaded weight are eliminated.
【００１８】これにより、推進プロペラで発生する推力
は実船に相当する推力となり、操舵時に発生する舵力も
実船と近いものとなるので、操縦性能の推定精度を向上
することができた。As a result, the thrust generated by the propelling propeller is equivalent to the thrust corresponding to the actual ship, and the steering force generated at the time of steering is close to that of the actual ship, so that the estimation accuracy of the steering performance can be improved.
【図１】本発明による摩擦抵抗修正の概念を示す図。FIG. 1 is a diagram showing the concept of frictional resistance correction according to the present invention.
【図２】本発明による摩擦抵抗修正装置の概略を示す
図。FIG. 2 is a diagram schematically showing a frictional resistance correcting device according to the present invention.
【図３】推進プロペラに摩擦抵抗増加分に相当する推力
を加えたときの概念を示す図。FIG. 3 is a diagram showing a concept when a thrust corresponding to an increase in frictional resistance is applied to a propelling propeller.
【図４】従来の摩擦抵抗修正の概念を示す図。FIG. 4 is a diagram showing the concept of conventional frictional resistance correction.
１ 模型船体 ２ 推進プロペラ ３ 舵 ４ 空中プロペラ ５ 駆動装置 ６ エアノズル ７ 検力計 ８ 圧縮ガスボン
ベ ９ 計測台車 １０ エアホース １１ 調整バルブ Ａ 実船相当のプロペラ推力 Ｂ 摩擦抵抗増加
分に相当する推力DESCRIPTION OF SYMBOLS 1 Model hull 2 Propulsion propeller 3 Rudder 4 Air propeller 5 Drive device 6 Air nozzle 7 Power meter 8 Compressed gas cylinder 9 Measurement bogie 10 Air hose 11 Adjustment valve A Propeller thrust equivalent to actual ship B Thrust equivalent to frictional resistance increase
フロントページの続き (72)発明者 高井 通雄 神奈川県横須賀市夏島町19番地 住友重機 械工業株式会社横須賀造船所内 (72)発明者 神戸 茂 神奈川県横須賀市夏島町19番地 住友重機 械工業株式会社横須賀造船所内 (72)発明者 桜井 仁 神奈川県横須賀市夏島町19番地 住友重機 械工業株式会社横須賀造船所内 Ｆターム(参考） 2G023 BB31 BB35 BC01 BD01 Continued on the front page (72) Inventor Michio Takai 19, Natsushima-cho, Yokosuka City, Kanagawa Prefecture Sumitomo Heavy Industries, Ltd.Yokosuka Shipyard (72) Inventor Shigeru Kobe 19, Natsushima-cho, Yokosuka City, Kanagawa Prefecture Inside the shipyard (72) Inventor Hitoshi Sakurai 19 Natsushima-cho, Yokosuka City, Kanagawa Prefecture F-term (reference) 2G023 BB31 BB35 BC01 BD01
Claims (2)
たエアノズルに、計測台車に積載され、調整弁を有する
圧縮ガスボンベよりエアホースを通じて圧縮ガスを送給
し、前記検力計によって模型船体に与えるエアノズルか
らの噴射反力を計測し、これにより圧縮ガスボンベの圧
力調整弁を調整して摩擦抵抗増加分に相当する推力をエ
アノズルから噴射させ、摩擦抵抗を修正することを特徴
とする船舶の自由航走模型試験方法。An air nozzle mounted on a rear end portion of a model hull via a power meter through which a compressed gas is supplied from a compressed gas cylinder having an adjusting valve, which is loaded on a measurement bogie, through an air hose. It measures the injection reaction force from the air nozzle applied to the model hull, and adjusts the pressure adjustment valve of the compressed gas cylinder to inject thrust corresponding to the increase in friction resistance from the air nozzle, thereby correcting the friction resistance. Free running model test method for ships.
ズルを取付け、検力計によって模型船体に与えるエアノ
ズルからの噴射反力を計測可能とし、水槽内を走行する
計測台車に圧縮ガスボンベを積載し、該圧縮ガスボンベ
とエアノズルとをエアホースで連結すると共に、圧縮ガ
スボンベには圧力調整弁を取付け、エアノズルからのガ
ス噴射量を調整可能としたことを特徴とする船舶の自由
航走模型試験装置。2. An air nozzle is attached to the rear end of the model hull via a force meter so that the jet reaction force from the air nozzle applied to the model hull can be measured by the force meter, and compressed into a measurement bogie traveling in the water tank. A free-running ship model, in which a gas cylinder is loaded, the compressed gas cylinder is connected to an air nozzle by an air hose, and a pressure regulating valve is attached to the compressed gas cylinder so that the gas injection amount from the air nozzle can be adjusted. Testing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36289399A JP3328622B2 (en) | 1999-12-21 | 1999-12-21 | Free-running model test method and apparatus for ships |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36289399A JP3328622B2 (en) | 1999-12-21 | 1999-12-21 | Free-running model test method and apparatus for ships |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001174364A true JP2001174364A (en) | 2001-06-29 |
| JP3328622B2 JP3328622B2 (en) | 2002-09-30 |
Family
ID=18478002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36289399A Expired - Fee Related JP3328622B2 (en) | 1999-12-21 | 1999-12-21 | Free-running model test method and apparatus for ships |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3328622B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101072440B1 (en) | 2009-12-17 | 2011-10-11 | 한국해양연구원 | Propulsion Supply Device and Method for Free Running Model Test |
| JP2012112878A (en) * | 2010-11-26 | 2012-06-14 | National Maritime Research Institute | Method and apparatus of load-variable self-propelling test |
| WO2014168250A1 (en) * | 2013-04-12 | 2014-10-16 | 独立行政法人海上技術安全研究所 | Free running model ship testing method and free running model ship testing device |
| JP2016075641A (en) * | 2014-10-09 | 2016-05-12 | 国立研究開発法人海上技術安全研究所 | Method of estimating variable torque or variable thrust of real ship from free-sailing model test, and free-sailing model testing device for use in the same |
| JP2016075642A (en) * | 2014-10-09 | 2016-05-12 | 国立研究開発法人海上技術安全研究所 | Method and apparatus for making propeller related characteristic of free-running model ship similar to that of actual ship |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101072440B1 (en) | 2009-12-17 | 2011-10-11 | 한국해양연구원 | Propulsion Supply Device and Method for Free Running Model Test |
| JP2012112878A (en) * | 2010-11-26 | 2012-06-14 | National Maritime Research Institute | Method and apparatus of load-variable self-propelling test |
| WO2014168250A1 (en) * | 2013-04-12 | 2014-10-16 | 独立行政法人海上技術安全研究所 | Free running model ship testing method and free running model ship testing device |
| JPWO2014168250A1 (en) * | 2013-04-12 | 2017-02-16 | 国立研究開発法人 海上・港湾・航空技術研究所 | Free-running model ship test method and free-running model ship test apparatus |
| JP2016075641A (en) * | 2014-10-09 | 2016-05-12 | 国立研究開発法人海上技術安全研究所 | Method of estimating variable torque or variable thrust of real ship from free-sailing model test, and free-sailing model testing device for use in the same |
| JP2016075642A (en) * | 2014-10-09 | 2016-05-12 | 国立研究開発法人海上技術安全研究所 | Method and apparatus for making propeller related characteristic of free-running model ship similar to that of actual ship |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3328622B2 (en) | 2002-09-30 |
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