JPH0534553U - Boundary layer thickness reducer for boundary layer wind tunnel - Google Patents
Boundary layer thickness reducer for boundary layer wind tunnelInfo
- Publication number
- JPH0534553U JPH0534553U JP9183991U JP9183991U JPH0534553U JP H0534553 U JPH0534553 U JP H0534553U JP 9183991 U JP9183991 U JP 9183991U JP 9183991 U JP9183991 U JP 9183991U JP H0534553 U JPH0534553 U JP H0534553U
- Authority
- JP
- Japan
- Prior art keywords
- boundary layer
- layer thickness
- wind tunnel
- ventilation hole
- layer wind
- 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.)
- Withdrawn
Links
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
(57)【要約】 （修正有）
【目的】 模型縮尺や試験条件に基づいて、境界層厚さ
の減少量を自在に調節することができる、従って試験精
度の高い境界層風洞の境界層厚さ減少装置を提供する。
【構成】 空気を床面０１に貫設した複数の通風孔から
外部に放出する境界層風洞の境界層厚さ減少手段におい
て、各通風孔１にそれぞれ開度調節可能のダンパー２を
枢着する。
(57) [Summary] (Correction) [Purpose] The reduction amount of the boundary layer thickness can be freely adjusted based on the model scale and the test conditions. Therefore, the boundary layer thickness of the boundary layer wind tunnel is highly accurate. A reduction device. In a boundary layer thickness reducing means of a boundary layer wind tunnel that discharges air to the outside from a plurality of ventilation holes penetrating the floor surface 01, dampers 2 whose opening degree can be adjusted are pivotally attached to each ventilation hole 1. ..
Description
【０００１】[0001]
本考案は境界層風洞の境界層厚さ減少装置に関する。 The present invention relates to a boundary layer thickness reducing device for a boundary layer wind tunnel.
【０００２】[0002]
自然界の風を風洞内で再現するための境界層風洞では、模型縮尺や試験条件に 基づいて境界層の厚さを減少する必要がある。 ところで、境界層風洞の境界層厚さ減少手段としては、従来、例えば、図２縦 断面図に示すように、床面０１に後方斜め下向きの複数の通風孔０２を貫設し、 これらから風路０３の主流量の一部流量ＱOSを等速流ｖO でそれぞれ外部へ放出 することにより、前流境界層厚さδO1を後流境界層厚さδO2にまで減少させるも のが知られている。In a boundary layer wind tunnel for reproducing natural winds in the wind tunnel, it is necessary to reduce the thickness of the boundary layer based on the model scale and test conditions. By the way, as a boundary layer thickness reducing means of a boundary layer wind tunnel, conventionally, for example, as shown in the longitudinal sectional view of FIG. It is possible to reduce the front boundary layer thickness δ O1 to the back boundary layer thickness δ O2 by releasing a part of the main flow rate Q OS of the channel 03 to the outside by the uniform velocity flow v O. Are known.
【０００３】 しかしながら、このような手段では、通風孔０２から外部へ放出される空気量 が一定なので、境界層厚さの減少量は常に一定であり、従って模型縮尺や試験条 件に自在に対応することができない。However, in such a means, the amount of air discharged from the ventilation hole 02 to the outside is constant, so the amount of decrease in the boundary layer thickness is always constant, and therefore, the scale of the model and the test conditions can be freely adjusted. Can not do it.
【０００４】[0004]
本考案は、このような事情に鑑みて提案されたもので、模型縮尺や試験条件に 基づいて、境界層厚さの減少量を自在に調節することができる、従って試験精度 の高い境界層風洞の境界層厚さ減少装置を提供することを目的とする。 The present invention has been proposed in view of such circumstances, and it is possible to freely adjust the reduction amount of the boundary layer thickness based on the model scale and the test conditions, and thus the boundary layer wind tunnel with high test accuracy. An object of the present invention is to provide a boundary layer thickness reducing device.
【０００５】[0005]
そのために、本考案は空気を床面に貫設した複数の通風孔から外部に放出する 境界層風洞の境界層厚さ減少手段において、上記各通風孔にそれぞれ開度調節可 能のダンパーを枢着することを特徴とする。 Therefore, in the present invention, in the boundary layer thickness reducing means of the boundary layer wind tunnel that discharges air to the outside from a plurality of ventilation holes penetrating the floor surface, a damper whose opening can be adjusted is provided for each ventilation hole. It is characterized by wearing.
【０００６】[0006]
【作用】 上述の構成により、模型縮尺や試験条件に基づいて、境界層厚さの減少量を自 在に調節することができる、従って試験精度の高い境界層風洞の境界層厚さ減少 装置を得ることができる。[Advantages] With the above-described configuration, it is possible to automatically adjust the reduction amount of the boundary layer thickness based on the model scale and the test conditions. Therefore, a boundary layer thickness reducing device for a boundary layer wind tunnel with high test accuracy can be provided. Obtainable.
【０００７】[0007]
本考案の一実施例を図面について説明すると、図２と同一の符号はそれぞれ同 図と同一の部材を示し、図１縦断面図において、１は底面０１に長手方向適宜間 隔で貫設された複数の通風孔で、各通風孔１の前端，後端の断面はそれぞれ後向 きに拡開する凹曲半円状，前方へ凸曲する半円状をなしている。２は各通風孔１ の前端の凹曲半円部の中心に位置する水平ピン３にそれぞれ枢着された流線形型 ダンパーで、水平ピン３の周りに適宜回動可能である。 An embodiment of the present invention will be described with reference to the drawings. The same reference numerals as those in FIG. 2 denote the same members as those in FIG. 2, and in the longitudinal sectional view of FIG. 1, 1 is provided on a bottom surface 01 at appropriate intervals in the longitudinal direction. With a plurality of ventilation holes, the cross-sections of the front end and the rear end of each ventilation hole 1 have a concave semicircular shape that widens rearward and a semicircular shape that convexly curves forward. Reference numeral 2 is a streamlined damper pivotally attached to a horizontal pin 3 located at the center of a concave semicircle at the front end of each ventilation hole 1, and can be appropriately rotated around the horizontal pin 3.
【０００８】 このような装置において、風路０３内の前流境界層厚さδO1の流れを後流境界 層厚さδ2 に減少させるには、同図に示すように、各ダンパー２を適宜角開いて 所定風量Ｑを等流速ｖで風路０３からそれぞれ放出することにより行う。In such an apparatus, in order to reduce the flow having the upstream boundary layer thickness δ O1 in the air passage 03 to the downstream boundary layer thickness δ 2 , as shown in the figure, each damper 2 is This is performed by opening the corners appropriately and discharging a predetermined air volume Q from the air passage 03 at a constant flow velocity v.
【０００９】 このような、実施例の装置によれば、下記効果が奏せられる。 (1) 空気を床面に貫設した複数の通風孔から外部に放出する境界層風洞の境界 層厚さ減少手段において、上記各通風孔にそれぞれ開度調節可能のダンパーを枢 着しているので、上記各通風孔から任意の流量で空気を外部へ放出することがで き、従って模型縮尺や試験条件に基づいて、境界層厚さの減少量を自在に調節可 能となり、試験精度が向上する。 (2) 各通風孔の縦断面の前端，後端はそれぞれ凹曲半円状，凸曲半円状断面を なし、かつ上記通風孔の前端に水平ピンで枢着されるダンパーは流線形状なので 、上記通風孔から外部へ空気を放出する際の抵抗が少なく、従って装置の経済性 が向上する。According to the apparatus of this embodiment, the following effects can be obtained. (1) In the boundary layer thickness reducing means of the boundary layer wind tunnel that discharges air to the outside from a plurality of ventilation holes penetrating the floor, dampers with adjustable opening are attached to each ventilation hole. Therefore, it is possible to discharge the air to the outside from each of the above ventilation holes at an arbitrary flow rate.Therefore, the reduction amount of the boundary layer thickness can be freely adjusted based on the model scale and the test conditions, and the test accuracy can be improved. improves. (2) The front and rear ends of the vertical cross section of each ventilation hole are concave semicircular and convex semicircular, respectively, and the damper pivotally attached to the front end of the ventilation hole by a horizontal pin is streamlined. Therefore, there is little resistance when air is released to the outside from the ventilation holes, and therefore the economical efficiency of the device is improved.
【００１０】[0010]
要するに本考案によれば、空気を床面に貫設した複数の通風孔から外部に放出 する境界層風洞の境界層厚さ減少手段において、上記各通風孔にそれぞれ開度調 節可能のダンパーを枢着することにより、模型縮尺や試験条件に基づいて、境界 層厚さの減少量を自在に調節することができる、従って試験精度の高い境界層風 洞の境界層厚さ減少装置を得るから、本考案は産業上極めて有益なものである。 In short, according to the present invention, in the boundary layer thickness reducing means of a boundary layer wind tunnel that discharges air to the outside from a plurality of ventilation holes penetrating the floor surface, a damper whose opening can be adjusted for each ventilation hole is provided. By pivoting, it is possible to freely adjust the reduction amount of the boundary layer thickness based on the model scale and the test conditions. Therefore, the boundary layer thickness reducing device of the boundary layer wind tunnel with high test accuracy can be obtained. The present invention is extremely useful in industry.
【図１】本考案の一実施例を示す縦断面図である。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】公知の境界層風洞の境界層厚さ減少手段を示す
縦断面図である。FIG. 2 is a vertical cross-sectional view showing a boundary layer thickness reducing means of a known boundary layer wind tunnel.
１ 通風孔 ２ ダンパー ３ 水平ピン ０１ 底面 ０３ 風路 Ｑ 風量 ｖ 流速 δO1 前流境界層厚さ δ2 後流境界層厚さ1 Ventilation hole 2 Damper 3 Horizontal pin 01 Bottom surface 03 Air passage Q Air volume v Flow velocity δ O1 Front boundary layer thickness δ 2 Back boundary layer thickness
Claims (1)
外部に放出する境界層風洞の境界層厚さ減少手段におい
て、上記各通風孔にそれぞれ開度調節可能のダンパーを
枢着することを特徴とする境界層風洞の境界層厚さ減少
装置。1. In a boundary layer thickness reducing means of a boundary layer wind tunnel that discharges air to the outside from a plurality of ventilation holes penetrating the floor surface, a damper whose opening can be adjusted is pivotally attached to each ventilation hole. A boundary layer thickness reducing device for a boundary layer wind tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9183991U JPH0534553U (en) | 1991-10-14 | 1991-10-14 | Boundary layer thickness reducer for boundary layer wind tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9183991U JPH0534553U (en) | 1991-10-14 | 1991-10-14 | Boundary layer thickness reducer for boundary layer wind tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0534553U true JPH0534553U (en) | 1993-05-07 |
Family
ID=14037762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9183991U Withdrawn JPH0534553U (en) | 1991-10-14 | 1991-10-14 | Boundary layer thickness reducer for boundary layer wind tunnel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0534553U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016200505A (en) * | 2015-04-10 | 2016-12-01 | 三菱重工メカトロシステムズ株式会社 | Boundary layer control device and wind tunnel test device using the same |
| JP2020046401A (en) * | 2018-09-21 | 2020-03-26 | 三菱重工業株式会社 | Boundary layer control device and wind tunnel testing apparatus |
-
1991
- 1991-10-14 JP JP9183991U patent/JPH0534553U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016200505A (en) * | 2015-04-10 | 2016-12-01 | 三菱重工メカトロシステムズ株式会社 | Boundary layer control device and wind tunnel test device using the same |
| JP2020046401A (en) * | 2018-09-21 | 2020-03-26 | 三菱重工業株式会社 | Boundary layer control device and wind tunnel testing apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19960208 |