JPH01201165A - Flow observation device - Google Patents
Flow observation deviceInfo
- Publication number
- JPH01201165A JPH01201165A JP2379888A JP2379888A JPH01201165A JP H01201165 A JPH01201165 A JP H01201165A JP 2379888 A JP2379888 A JP 2379888A JP 2379888 A JP2379888 A JP 2379888A JP H01201165 A JPH01201165 A JP H01201165A
- Authority
- JP
- Japan
- Prior art keywords
- flow
- flow velocity
- screen mesh
- temperature
- distribution
- 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.)
- Pending
Links
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000020169 heat generation Effects 0.000 abstract 1
- 239000000779 smoke Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000700 radioactive tracer Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、流体力学の分野における流動現象を観察・測
定するために用いる流動観測装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flow observation device used for observing and measuring flow phenomena in the field of fluid mechanics.
流動現象を観測する方法は多数あるが、はとんどの場合
「トレーサー」法と称するもので、流れの中に煙やイン
クなどのトレーサーを混入し、これを観測するものであ
る。There are many methods for observing flow phenomena, but the most common is the so-called ``tracer'' method, in which tracers such as smoke or ink are mixed into the flow and then observed.
４は観測方向を示し、１０は流れの入口部分に設けた煙
の発生源である。流体の流動現象の観測にあたって、流
体と共に動きかつ目視可能な煙の動きを観測するもので
ある。Reference numeral 4 indicates the observation direction, and reference numeral 10 indicates a smoke generation source provided at the inlet of the flow. In observing fluid flow phenomena, we observe the movement of smoke that moves with the fluid and is visible to the naked eye.
従来の技術においては次のような問題点があった。 The conventional technology has the following problems.
（１） 観測方向から見て、煙などのトレーサーの厚
さ方向の濃さの総和が観測されるので、１断面の流動状
況だけをピックアップして観測することができない。(1) Viewed from the observation direction, the total density of tracers such as smoke in the thickness direction is observed, so it is not possible to pick up and observe the flow situation of only one cross section.
（２）トレーサーの濃淡や移動状況を観測者の主観によ
らないで記録あるいは表示する適切な方法がないので、
観測は観測者の主観を介して行われており、客観性に欠
ける。(2) There is no appropriate method to record or display the shading and movement status of the tracer without relying on the subjectivity of the observer.
Observation is performed through the subjectivity of the observer and lacks objectivity.
（３）トレーサーの観測だけでは流速についての情報は
得られない。(3) Information about flow velocity cannot be obtained from tracer observations alone.
本発明は、１断面をピックアップして観測でき、かつ流
動状況を客観的に観測でき、さらに流速の測定も可能な
流動観測装置を提供しようとするものである。The present invention aims to provide a flow observation device that can pick up and observe one cross section, objectively observe the flow situation, and also measure the flow velocity.
本発明は前記課題を解決したものであって、観測部の中
に流れに沿って設けたスクリーンメツシュ、同スクリー
ンメツシュ両端に設けられた電極、同電極間に電圧を付
加する電源、および同スクリーンメツシュを観測部の外
から観測する赤外線サーモビュアを具備したことを特徴
とする流動観測装置で゛ある。The present invention has solved the above problems, and includes a screen mesh provided along the flow in the observation section, electrodes provided at both ends of the screen mesh, a power source for applying voltage between the electrodes, and This is a flow observation device characterized by being equipped with an infrared thermoviewer for observing the screen mesh from outside the observation section.
スクリーンメツシュの両端の電極間に電圧をかけること
によってスクリーンメツシュバー様発熱する。これを流
れ圧沿って観測部の中に設けたことによって、流速の速
い所では冷やされて低温になシ、流速の遅い所では高温
となる。A screen mesh bar generates heat by applying a voltage between the electrodes at both ends of the screen mesh. By installing this in the observation section along the flow pressure, areas where the flow velocity is high will be cooled down to a low temperature, and areas where the flow velocity is slow will be high temperature.
これを赤外線サーモビュアによって観測すれば流速分布
が観測できる。スクリーンメツシュは流れに沿って設け
であるのでスクリーンメツシュの位置における流れの断
面の流動状況が観測できる。If this is observed using an infrared thermoviewer, the flow velocity distribution can be observed. Since the screen mesh is provided along the flow, the flow condition in the cross section of the flow at the position of the screen mesh can be observed.
４は観測方向、５は観測部３の中に流れの方向に平行に
設けられたスクリーンメツシュ、６はスクリーンメツシ
ュ５の両端に設けられた電極、７は同電極に接続されて
いる電源、８は観測部３の前面に設けられた赤外線透過
窓、９は赤外線透過窓を経て観測部の内部のスクリーン
メソシュ５を観察するための赤外線サーモビュアである
。スクリーンメツシュ５は５〜２０メツシュ程度のもの
で、表面はふく射率を１にするために黒色にしである。4 is the observation direction, 5 is a screen mesh provided in the observation section 3 parallel to the flow direction, 6 is an electrode provided at both ends of the screen mesh 5, and 7 is a power source connected to the electrode. , 8 is an infrared transmission window provided in the front of the observation section 3, and 9 is an infrared thermoviewer for observing the screen mesh 5 inside the observation section through the infrared transmission window. The screen mesh 5 has about 5 to 20 meshes, and its surface is black in order to make the radiation rate 1.
本装置においては、スクリーンメツシュ５の両端の電極
６に電源７によって電圧をかけ、スクリーンメツシュを
一様発熱させる。これを赤外線透過窓８を通して赤外線
サーモビュア９で東
観測する。スクリーンメツシュは一様熱流速の発熱体で
あるから流速の大きい所では良く冷えて温度が低くなる
。逆に流速が小さい所では温度が高くなる。したがって
温度分布を測定すれば流速分布がわかる。予め流速と温
度との関係を校正しておけば、流速の絶対値の分布を知
ることができる。またステップ状またはパルス状に電圧
をかければ、温度分布の時間的変遷によって流動状況を
把握することができる。前述の流速分布データと対照す
ればより正確な観測を行うことができる。In this device, a voltage is applied to the electrodes 6 at both ends of the screen mesh 5 by a power source 7 to cause the screen mesh to generate heat uniformly. This is observed to the east by an infrared thermoviewer 9 through an infrared transmission window 8. Since the screen mesh is a heating element with a uniform heat flow rate, it cools well and has a low temperature in areas where the flow rate is high. Conversely, where the flow velocity is low, the temperature increases. Therefore, by measuring the temperature distribution, the flow velocity distribution can be determined. By calibrating the relationship between flow velocity and temperature in advance, it is possible to know the distribution of absolute values of flow velocity. Furthermore, by applying a voltage stepwise or in a pulsed manner, it is possible to grasp the flow situation based on the temporal change in temperature distribution. More accurate observations can be made by comparing with the flow velocity distribution data described above.
本発明の観測装置においては、観測部の中に流れに沿っ
てメツシュスクリーンを設は電圧をかけて一様発熱させ
、流れによる冷却効果による温度の高低を外部からサー
モビュアによって観測するようにしたことによって、流
れ洗沿った１断面の流動現象を客観的に観測でき、また
あらかじめ流速とメツシュスクリーンの温度を校正して
おくことによって流速の測定も可能である。In the observation device of the present invention, a mesh screen is installed inside the observation section along the flow, and a voltage is applied to uniformly generate heat, and the temperature rise and fall due to the cooling effect of the flow is observed from the outside using a thermoviewer. By doing this, it is possible to objectively observe the flow phenomenon in one cross section along the flow, and it is also possible to measure the flow velocity by calibrating the flow velocity and mesh screen temperature in advance.
第１図は本発明の一実施例の斜視図、第２図は従来技術
の一例の斜視図である。
１・・・流れの流入方向、２・・・流れの流出方向３・
・・観測部、４・・・観測方向、５・・・スクリーンメ
ツシュ、６・・・電極、７・・・電源、８・・・赤外線
透過窓、９・・・赤外線サーモビュア、１０・・・煙の
発生源。
代理人 弁理士 坂 間 暁 外２名
」ＩＡ
、＄２ＴＡFIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of an example of the prior art. 1...Inflow direction of flow, 2...Outflow direction of flow3.
... Observation section, 4... Observation direction, 5... Screen mesh, 6... Electrode, 7... Power supply, 8... Infrared transmission window, 9... Infrared thermoviewer, 10... - Source of smoke. Agent: Patent attorney Akira Sakama and 2 others” IA, $2TA
Claims (1)
同スクリーンメッシュ両端に設けられた電極、同電極間
に電圧を付加する電源、および同スクリーンメッシュを
観測部の外から観測する赤外線サーモビュアを具備した
ことを特徴とする流動観測装置。A screen mesh installed along the flow inside the observation section,
A flow observation device comprising electrodes provided at both ends of the screen mesh, a power source for applying voltage between the electrodes, and an infrared thermoviewer for observing the screen mesh from outside the observation section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2379888A JPH01201165A (en) | 1988-02-05 | 1988-02-05 | Flow observation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2379888A JPH01201165A (en) | 1988-02-05 | 1988-02-05 | Flow observation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01201165A true JPH01201165A (en) | 1989-08-14 |
Family
ID=12120342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2379888A Pending JPH01201165A (en) | 1988-02-05 | 1988-02-05 | Flow observation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01201165A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6732582B2 (en) * | 2002-08-23 | 2004-05-11 | General Electric Company | Method for quantifying film hole flow rates for film-cooled parts |
| DE102005031845A1 (en) * | 2005-07-06 | 2007-01-11 | Behr Gmbh & Co. Kg | Measurement station e.g. for motor vehicle air nozzle, has projection screen and thermograhic camera with projection screen arranged perpendicularly to axis of camera of thermographic camera |
| US7651261B2 (en) | 2007-07-10 | 2010-01-26 | General Electric Company | System and method for thermal inspection of parts |
| US7909507B2 (en) | 2008-04-11 | 2011-03-22 | General Electric Company | Thermal inspection system and method |
| CN104569486A (en) * | 2015-01-16 | 2015-04-29 | 东南大学 | Hot air speed sensing system composed of infrared image sensor |
-
1988
- 1988-02-05 JP JP2379888A patent/JPH01201165A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6732582B2 (en) * | 2002-08-23 | 2004-05-11 | General Electric Company | Method for quantifying film hole flow rates for film-cooled parts |
| DE102005031845A1 (en) * | 2005-07-06 | 2007-01-11 | Behr Gmbh & Co. Kg | Measurement station e.g. for motor vehicle air nozzle, has projection screen and thermograhic camera with projection screen arranged perpendicularly to axis of camera of thermographic camera |
| US7651261B2 (en) | 2007-07-10 | 2010-01-26 | General Electric Company | System and method for thermal inspection of parts |
| US7909507B2 (en) | 2008-04-11 | 2011-03-22 | General Electric Company | Thermal inspection system and method |
| CN104569486A (en) * | 2015-01-16 | 2015-04-29 | 东南大学 | Hot air speed sensing system composed of infrared image sensor |
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