JP3082827B2 - Wind tunnel contraction nozzle - Google Patents
Wind tunnel contraction nozzleInfo
- Publication number
- JP3082827B2 JP3082827B2 JP07011595A JP1159595A JP3082827B2 JP 3082827 B2 JP3082827 B2 JP 3082827B2 JP 07011595 A JP07011595 A JP 07011595A JP 1159595 A JP1159595 A JP 1159595A JP 3082827 B2 JP3082827 B2 JP 3082827B2
- Authority
- JP
- Japan
- Prior art keywords
- contraction nozzle
- laval
- wind tunnel
- flow velocity
- contraction
- 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.)
- Expired - Lifetime
Links
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、計測用風洞等に適用さ
れる風洞用縮流ノズルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind tunnel contraction nozzle applied to a measurement wind tunnel or the like.
【０００２】[0002]
【従来の技術】図３に従来の風洞用縮流ノズルを示し、
縮流ノズル本体１の絞り出口付近の壁面形状は先細形と
なっており、ノズル出口端の壁面の傾きは縮流ノズルの
中心軸に対して平行である。2. Description of the Related Art FIG. 3 shows a conventional contraction nozzle for a wind tunnel.
The wall shape near the outlet of the contraction nozzle main body 1 is tapered, and the inclination of the wall surface at the nozzle exit end is parallel to the central axis of the contraction nozzle.
【０００３】[0003]
【発明が解決しようとする課題】前記の従来の縮流ノズ
ルの形状では、図４に示すように、縮流ノズル出口の空
気の流速分布は、壁面近くで流速が大きく中心付近で流
速が小さいという傾向が顕著であった。このような傾向
が生じる理由は絞りの曲率の作用で壁面に沿う流れに遠
心力が働くからである。As shown in FIG. 4, in the shape of the conventional contraction nozzle, the flow velocity distribution of the air at the exit of the contraction nozzle is such that the flow velocity is large near the wall surface and small near the center. The tendency was remarkable. The reason for this tendency is that centrifugal force acts on the flow along the wall surface due to the effect of the curvature of the throttle.
【０００４】本発明は、前記の問題点を解決し出口の流
速分布を一定にすることができる風洞用縮流ノズルを提
供しようとするものである。An object of the present invention is to solve the above-mentioned problems and to provide a flow tunnel nozzle for a wind tunnel capable of maintaining a constant flow velocity distribution at an outlet.
【０００５】[0005]
【課題を解決するための手段】本発明の風洞用縮流ノズ
ルは、縮流ノズル本体の絞り出口付近の壁面が、先細形
の部分と同先細形の部分の下流側に続きのど部があり下
流側へ拡がるラバール形の部分とを有し、同ラバール形
の部分により流速分布が均一になるように構成した。Means for Solving the Problems] wind tunnel for contraction flow nozzle of the present invention, the wall near the exit aperture of the vena contracta nozzle body, there is a throat followed downstream portion of the tapered shape and the tapered shape of the portion and a Laval-shaped portion extending to the downstream side, the de Laval type
The flow rate distribution was made uniform by the part .
【０００６】[0006]
【作用】先細形の壁面形状をもつ縮流ノズル本体の絞り
部分では、前記のように、絞りの曲率の作用で壁面に沿
う流れに遠心力が働き、中心付近より壁面近くの流速が
大きくなるという傾向がある。The centrifugal force acts on the flow along the wall surface due to the effect of the curvature of the throttle at the throttle portion of the contraction nozzle body having a tapered wall shape, as described above, and the flow velocity near the wall surface becomes larger than near the center. There is a tendency.
【０００７】本発明では、縮流ノズル本体の絞り出口付
近の壁面を、先細形の部分とこの下流側に続くのど部が
あり下流側に拡がるラバール（Laval)形の部分とで構成
しており、このラバール形の部分の拡がりの曲率の作用
を利用し、先細形の部分で生じた縮流ノズル本体断面内
の流速の不均一性を緩和させ、縮流ノズル本体の絞り出
口面の流速分布の一様化を図ることができる。In the present invention, the wall surface near the throttle outlet of the contraction nozzle body is constituted by a tapered portion and a Laval-shaped portion having a throat portion extending downstream and expanding downstream. Utilizing the action of the curvature of expansion of the Laval-shaped portion, the unevenness of the flow velocity in the cross section of the contraction nozzle body generated at the tapered portion is reduced, and the flow velocity distribution at the throttle outlet surface of the contraction nozzle body is reduced. Can be made uniform.
【０００８】[0008]
【実施例】本発明の一実施例を、図１及び図２によって
説明する。図１に示すように、矢印方向に空気が流れる
縮流ノズル本体１の絞り出口付近の壁面は、先細形の部
分２とその下流側に続き下流側へ拡がるラバール形の部
分３とで構成され、先細形の部分２に連なるラバール形
の部分３の上流側の部分にはのど部４が形成されてい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the wall surface near the throttle outlet of the contraction nozzle body 1 through which air flows in the direction of the arrow is formed of a tapered portion 2 and a Laval-shaped portion 3 which extends downstream downstream of the tapered portion 2. A throat portion 4 is formed at a portion on the upstream side of the Laval portion 3 connected to the tapered portion 2.
【０００９】本実施例では、先細形の部分２の絞りの曲
率によって縮流ノズル本体１の壁面近くの流速が縮流ノ
ズル本体１の中心付近の流速より大きくなる。しかし、
先細形の部分２に続いて下流側に拡がりのど部４がある
ラバール形の部分３が設けられているので、このラバー
ル形の部分３の拡がりの曲率は縮流ノズル本体１の壁面
近くの流速を縮流ノズル本体１の中心付近の流速に比し
て小さくすることになる。従って、先細形の部分２の絞
りの曲率によって生じた縮流ノズル本体１の半径方向に
おける不均一な流速分布を、図２に示すようにラバール
形の部分３によって均一な流速分布とすることができ
る。In this embodiment, the flow velocity near the wall surface of the contraction nozzle main body 1 becomes larger than the flow velocity near the center of the contraction nozzle main body 1 due to the curvature of the restriction of the tapered portion 2. But,
Since the Laval-shaped portion 3 having the widening throat 4 is provided downstream of the tapered portion 2, the curvature of the expansion of the Laval-shaped portion 3 is determined by the flow velocity near the wall surface of the contraction nozzle body 1. Is smaller than the flow velocity near the center of the contraction nozzle body 1. Therefore, the uneven flow velocity distribution in the radial direction of the contraction nozzle main body 1 caused by the curvature of the restriction of the tapered section 2 can be made uniform by the Laval-shaped section 3 as shown in FIG. it can.
【００１０】[0010]
【発明の効果】本発明は、風洞用縮流ノズルを、縮流ノ
ズル本体の絞り出口付近の壁面が、先細形の部分と同先
細形の部分の下流側に続きのど部があり下流側へ拡がる
ラバール形の部分とを有し、同ラバール形の部分により
流速分布が均一になるように構成したので、縮流ノズル
本体の出口の流速分布を一様化することができる。According to the present invention, a contraction nozzle for a wind tunnel is provided in which a wall near a throttle outlet of a contraction nozzle body has the same point as a tapered portion.
And a Laval-shaped portion extending to the downstream side has a throat portion continued to the downstream side of the portion of the elongate, the portions of the de Laval type
Since it is configured so that the flow velocity distribution is uniform, as possible out to uniform the flow velocity distribution at the outlet of the contraction nozzle body.
【図１】本発明の一実施例の要部の説明図である。FIG. 1 is an explanatory diagram of a main part of an embodiment of the present invention.
【図２】図１のＡ部の拡大図である。FIG. 2 is an enlarged view of a portion A in FIG.
【図３】従来の縮流ノズルの要部の説明図である。FIG. 3 is an explanatory diagram of a main part of a conventional contraction nozzle.
【図４】図３のＢ部の拡大図である。FIG. 4 is an enlarged view of a portion B in FIG. 3;
１ 縮流ノズル本体 ２ 先細形の部分 ３ ラバール形の部分 ４ のど部 DESCRIPTION OF SYMBOLS 1 Contraction nozzle main body 2 Tapered part 3 Laval shaped part 4 Throat
Claims (1)
が、先細形の部分と同先細形の部分の下流側に続きのど
部があり下流側へ拡がるラバール形の部分とを有し、同
ラバール形の部分により流速分布が均一になるように構
成したことを特徴とする風洞用縮流ノズル。1. A wall near a throttle outlet of a contraction nozzle body.
But has a Laval-shaped portion extending to the downstream side has a throat portion continued to the downstream side of the tapered shape of the portion and the tapered shape of the portion, the
The Laval shape is used to make the flow velocity distribution uniform.
A contraction nozzle for a wind tunnel, characterized by being formed .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07011595A JP3082827B2 (en) | 1995-01-27 | 1995-01-27 | Wind tunnel contraction nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07011595A JP3082827B2 (en) | 1995-01-27 | 1995-01-27 | Wind tunnel contraction nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08201216A JPH08201216A (en) | 1996-08-09 |
| JP3082827B2 true JP3082827B2 (en) | 2000-08-28 |
Family
ID=11782270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07011595A Expired - Lifetime JP3082827B2 (en) | 1995-01-27 | 1995-01-27 | Wind tunnel contraction nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3082827B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363888B (en) * | 2018-03-11 | 2022-03-08 | 广州富森环保科技股份有限公司 | Method for designing flow channel contraction curve |
| JP6977706B2 (en) | 2018-04-11 | 2021-12-08 | 株式会社デンソー | Air blower |
-
1995
- 1995-01-27 JP JP07011595A patent/JP3082827B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08201216A (en) | 1996-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5461866A (en) | Gas turbine engine combustion liner float wall cooling arrangement | |
| JP4298677B2 (en) | Engine exhaust gas deflection system | |
| JP4141006B2 (en) | High pressure cleaning spray nozzle | |
| US20090193615A1 (en) | Fan nozzle | |
| JP3082827B2 (en) | Wind tunnel contraction nozzle | |
| JPH0799027B2 (en) | Plate water faucet | |
| US6644355B1 (en) | Diffusing corner for fluid flow | |
| US5211057A (en) | Nozzle diffuser for use with an open test section of a wind tunnel | |
| JP3569888B2 (en) | Orifice plate | |
| JPH0510574B2 (en) | ||
| US4170134A (en) | Fluid-flow pressure-sensing device | |
| US20170113326A1 (en) | Fan nozzle | |
| JPS62228831A (en) | Air flow deflecting device of air conditioning duct | |
| US5590688A (en) | Device provided with a gas flow channel to reduce noise caused by throttling a gas flow | |
| JP3068858U (en) | Cylindrical pier | |
| US20100221989A1 (en) | Fan nozzle | |
| JPH09210120A (en) | Vibration control structure of cylindrical structure | |
| JPH07657Y2 (en) | Silencer for air blower | |
| JPH0611087A (en) | Branch pipe | |
| JP3626614B2 (en) | Gas jet heat treatment equipment for steel strip | |
| KR960704122A (en) | A SHORT DWELL COATER APPARATUS | |
| JPS595209Y2 (en) | Spiral fluid element | |
| JPS581623Y2 (en) | exhaust pipe | |
| JPH0718627A (en) | Damping type diagonal built bridge cable | |
| JPH056128B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000516 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090630 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100630 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100630 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110630 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110630 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120630 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120630 Year of fee payment: 12 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120630 Year of fee payment: 12 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130630 Year of fee payment: 13 |
|
| EXPY | Cancellation because of completion of term |