JPH0547069B2 - - Google Patents
Info
- Publication number
- JPH0547069B2 JPH0547069B2 JP61170850A JP17085086A JPH0547069B2 JP H0547069 B2 JPH0547069 B2 JP H0547069B2 JP 61170850 A JP61170850 A JP 61170850A JP 17085086 A JP17085086 A JP 17085086A JP H0547069 B2 JPH0547069 B2 JP H0547069B2
- Authority
- JP
- Japan
- Prior art keywords
- fluid
- flow
- flow velocity
- distribution
- 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.)
- Expired - Lifetime
Links
- 239000012530 fluid Substances 0.000 claims description 34
- 238000012545 processing Methods 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 6
- 238000012800 visualization Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000000700 radioactive tracer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- -1 bubbles Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/065—Measuring arrangements specially adapted for aerodynamic testing dealing with flow
- G01M9/067—Measuring arrangements specially adapted for aerodynamic testing dealing with flow visualisation
Description
【発明の詳細な説明】
(イ) 発明の技術分野〕
本発明は流体、または物体まわりの流体の流れ
を観察する際に、その流れに特別な処理を施さず
にその流速分布を観察できる流れの可視化装置に
関するものである。[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a flow in which the flow velocity distribution can be observed without applying any special processing to the flow when observing the flow of a fluid or a fluid around an object. The present invention relates to a visualization device.
気流、または水流などの流体の流れの中に置か
れた物体の後流など、その流れの流速分布を観察
する場合には、その気流または水流中に煙、気
泡、染料などを混入するトレーサ法及び物体表面
の流跡線を直接見ることのできる油膜法などが従
来使用されている。
When observing the flow velocity distribution of a flow of air or water, such as the wake of an object placed in the flow, the tracer method involves mixing smoke, bubbles, dye, etc. into the air or water flow. The oil film method, which allows direct observation of trajectory lines on the surface of an object, has been conventionally used.
しかしながら、これらの従来方法では、必ずト
レーサとして流体とは異質な物質を使用するた
め、観察時にはその処理まで考慮した手続きが必
要であり、それだけ手間がかかるという問題があ
ると共に、使用する異質物質が流体中に混入し、
例えば大気や海洋などを汚染するという問題があ
つた。一方、赤外線による熱放射強度から被計測
物のコロイド粒子の濃度変動を取得して、その時
間的ずれから、この時間をコロイド粒子群の二平
面間の移動時間を求め、速度を算出する流れ断面
と直交する方向の速度測定方法が知られている
が、この速度測定方法は、測定に供する装置が複
雑で、かつ高価になるという欠点がある。 However, these conventional methods always use a substance that is different from the fluid as a tracer, so it is necessary to take into consideration the treatment of the substance during observation, which is time-consuming. mixed into the fluid,
For example, there was the problem of polluting the atmosphere and oceans. On the other hand, the concentration fluctuation of colloidal particles in the object to be measured is obtained from the thermal radiation intensity of infrared rays, and from the time lag, this time is determined as the travel time of the colloidal particle group between two planes, and the flow cross section is used to calculate the velocity. A method for measuring speed in a direction perpendicular to the direction is known, but this method has the disadvantage that the equipment used for the measurement is complex and expensive.
本発明は、流体中に曝された物体表面上の熱エ
ネルギーが周囲流体の流速の関数として流体中に
失われるため、物体表面に熱放射強度の分布が生
ずるという知見を得てなされたものであり、その
目的は、簡便な方式であるにもかかわらず、物体
のまわりを流れる流体の流速分布を瞬時に観察で
きる流れの可視化装置を提供することにある。
The present invention was made based on the knowledge that thermal energy on the surface of an object exposed to a fluid is lost into the fluid as a function of the flow velocity of the surrounding fluid, resulting in a distribution of thermal radiation intensity on the surface of the object. The purpose of the present invention is to provide a flow visualization device that can instantaneously observe the flow velocity distribution of a fluid flowing around an object, although it is a simple method.
上記の目的を達成するため、本発明の流れの可
視化装置は、流体、または流体の流れの中に置か
れた物体表面を、静止流体中で一定温度になるよ
うに加熱しながらその流体を流して、赤外線撮影
機能を有するテレビカメラで流体の温度分布、ま
たはその物体表面の温度分布の変化を計測すると
共に、その温度分布の変化を、熱放射エネルギー
と表面流速との関係式より表面流速を求めるマイ
コン及び画面処理装置により画面処理して流速分
布用モニターテレビに流速分布としてデイスプレ
イするようにしたことを特徴とするものである。
To achieve the above object, the flow visualization device of the present invention allows the fluid to flow while heating the fluid or the surface of an object placed in the fluid flow to a constant temperature in the stationary fluid. The temperature distribution of the fluid or the change in temperature distribution on the surface of the object is measured using a television camera with an infrared imaging function, and the change in temperature distribution is calculated by calculating the surface flow velocity using the relational expression between thermal radiation energy and surface flow velocity. This feature is characterized in that the screen is processed by a desired microcomputer and screen processing device and displayed as a flow velocity distribution on a flow velocity distribution monitor television.
以下、図面を参照して本発明の実施例について
説明する。第１図は本発明の一実施例における流
れの可視化装置の概略説明図である。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a flow visualization device in an embodiment of the present invention.
まず、流体の流れＦの中に置かれた物体１の表
面を、静止流体中で一定温度になるように外部か
らランプ２で加熱し、その状態でその流体を流し
て、赤外線撮影機能を有するテレビカメラ３で撮
像し、その物体１の表面温度分布の強度に応じた
濃淡、または色段階画像を出力する電子回路４か
らなる既存技術であるサーモグラフイを用いて物
体１の表面の温度分布の変化を計測し、その結果
を温度分布用のモニターテレビ５にデイスプレイ
して観察できるようにしており、これにより物体
１の表面温度の変化を観察することができる。 First, the surface of an object 1 placed in a fluid flow F is heated from the outside with a lamp 2 so that it reaches a constant temperature in a stationary fluid, and the fluid is allowed to flow in that state to obtain an infrared photographing function. The temperature distribution on the surface of the object 1 is measured using thermography, which is an existing technology consisting of an electronic circuit 4 that is imaged by a television camera 3 and outputs a shading or color-graded image according to the intensity of the surface temperature distribution of the object 1. The changes in the surface temperature of the object 1 can be observed by displaying the results on a monitor television 5 for temperature distribution, thereby making it possible to observe changes in the surface temperature of the object 1.
更に、上記の温度分布の変化を、熱放射エネル
ギーと表面流速との関係式より表面流速を求める
マイコン６及び画像処理装置７にて画像処理する
ことにより、流速分布用のモニターテレビ８に流
速分布としてデイスプレイして、流体の流れＦの
流速分布を目視により瞬時に観察できるようにし
ている。 Furthermore, the change in the temperature distribution is image-processed by the microcomputer 6 and the image processing device 7, which calculate the surface flow velocity from the relational expression between the thermal radiation energy and the surface flow velocity, and the flow velocity distribution is displayed on the monitor TV 8 for flow velocity distribution. , so that the flow velocity distribution of the fluid flow F can be visually observed instantaneously.
なお、上記実施例の場合、物体１の表面を外部
からランプ２によつて加熱して、静止流体中で一
定温度になるようにしているが、物体１の内部に
ヒーテイングフイラメントなどを組込んで加熱す
るようにしても良い。 In the case of the above embodiment, the surface of the object 1 is heated from the outside by the lamp 2 to maintain a constant temperature in the stationary fluid, but it is also possible to incorporate a heating filament or the like inside the object 1. You may also heat it with
次に、第２図は本発明の他の実施例における流
れＦの可視化方法の適用例を示しており、この場
合は、流体の流れＦの物体１の物体後流の流速分
布を観察する例であり、赤外線撮影機能を有する
テレビカメラ３の焦点をその物体後流の被計測面
１０に合わせ、電気回路４で流体の温度分布の変
化を計測し、それを直接、流速分布に画像処理し
て流速分布用のモニターテレビ８により目視にて
観察するようにしている。 Next, FIG. 2 shows an example of application of the method of visualizing the flow F in another embodiment of the present invention, in this case, an example of observing the flow velocity distribution of the object 1 in the fluid flow F. A television camera 3 with an infrared photographing function is focused on the measured surface 10 behind the object, and an electric circuit 4 measures changes in the temperature distribution of the fluid, which is then directly image-processed into a flow velocity distribution. The flow velocity distribution is visually observed using a monitor television 8 for flow velocity distribution.
この場合、テレビカメラ３の焦点をテレビカメ
ラ３の視野９の被計測面１０に合わせ、かつ焦点
深度をできるだけ浅くするように調節しており、
更にその被計測面１０に流れ込む流体の流れＦを
予熱するため、流れＦの上流でマイクロ波Ｍによ
る非接触昇温を行なつており、これにより昇温し
た流体塊をトレーサとして流体の後流の流速分布
を観察できるようにしてる。 In this case, the focus of the television camera 3 is adjusted to match the measurement surface 10 of the field of view 9 of the television camera 3, and the depth of focus is adjusted to be as shallow as possible.
Furthermore, in order to preheat the fluid flow F flowing into the measurement surface 10, non-contact heating is performed using microwaves M at the upstream side of the flow F, and the heated fluid mass is used as a tracer to generate a wake of the fluid. The flow velocity distribution can be observed.
上記のように、本発明は、流体、または流体の
流れの中に置かれた物体表面を、静止流体中で一
定温度になるように加熱しながらその流体を流し
て、赤外線撮影機能を有するテレビカメラで流体
の温度分布、またはその物体表面の温度分布の変
化を計測すると共に、その温度分布の変化を、熱
放射エネルギーと表面流速との関係式より表面流
速を求めるマイコン及び画面処理装置により画面
処理して流速分布用モニターテレビに流速分布と
してデイスプレイするようにしたので、簡便な方
式であるにもかかわらず、物体のまわりを流れる
流体の流速分布を瞬時に観察できるようになつ
た。
As described above, the present invention provides a television having an infrared photographing function by heating a fluid or the surface of an object placed in a flow of fluid to a constant temperature in a stationary fluid while flowing the fluid. A camera measures the temperature distribution of the fluid or changes in the temperature distribution on the surface of the object, and the changes in temperature distribution are displayed on a screen by a microcomputer and screen processing device that calculates the surface flow velocity from the relational expression between thermal radiation energy and surface flow velocity. By processing the data and displaying it as a flow velocity distribution on a flow velocity distribution monitor television, it has become possible to instantly observe the flow velocity distribution of fluid flowing around an object, although it is a simple method.
第１図及び第２図は本発明の流れの可視化装置
を適用したそれぞれ異なる各実施例を示す概略説
明図である。
１…物体、２…ランプ、３…テレビカメラ、４
…電子回路、７…画像処理装置、８…流速分布用
のモニターテレビ、Ｆ…流れ、Ｍ…マイクロ波。
FIGS. 1 and 2 are schematic explanatory diagrams showing different embodiments to which the flow visualization device of the present invention is applied. 1...Object, 2...Lamp, 3...TV camera, 4
...electronic circuit, 7...image processing device, 8...monitor television for flow velocity distribution, F...flow, M...microwave.
Claims (1)
表面を、静止流体中で一定温度になるように加熱
しながらその流体を流して、赤外線撮影機能を有
するテレビカメラで流体の温度分布、またはその
物体表面の温度分布の変化を計測すると共に、そ
の温度分布の変化を、熱放射エネルギーと表面流
速との関係式より表面流速を求めるマイコン及び
画面処理装置により画面処理して流速分布用モニ
ターテレビに流速分布としてデイスプレイするよ
うにした流れの可視化装置。1 A fluid or the surface of an object placed in a fluid flow is heated to a constant temperature in a stationary fluid, and the fluid is flown, and a television camera with an infrared photographing function is used to measure the temperature distribution of the fluid, or The change in temperature distribution on the surface of the object is measured, and the change in temperature distribution is processed on a screen by a microcomputer and screen processing device that calculates the surface flow velocity from the relational expression between thermal radiation energy and surface flow velocity, and the flow velocity distribution monitor TV A flow visualization device that displays the flow velocity distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17085086A JPS6327766A (en) | 1986-07-22 | 1986-07-22 | Visualizing apparatus for flow of fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17085086A JPS6327766A (en) | 1986-07-22 | 1986-07-22 | Visualizing apparatus for flow of fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6327766A JPS6327766A (en) | 1988-02-05 |
| JPH0547069B2 true JPH0547069B2 (en) | 1993-07-15 |
Family
ID=15912479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17085086A Granted JPS6327766A (en) | 1986-07-22 | 1986-07-22 | Visualizing apparatus for flow of fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6327766A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01101430A (en) * | 1987-10-15 | 1989-04-19 | Nkk Corp | Method for detecting flow state of air flow on body-installed pedestal |
| JPH01101465A (en) * | 1987-10-15 | 1989-04-19 | Nkk Corp | Detecting method for stripped position of air flow on body surface |
| JPH01180461A (en) * | 1988-01-13 | 1989-07-18 | Nkk Corp | Flow state detecting method for air current on surface of assembly of pedestal and installed body |
| DE3826379C1 (en) * | 1988-08-03 | 1989-10-26 | Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De | |
| JP4502256B2 (en) | 2004-09-07 | 2010-07-14 | 株式会社山武 | Flow sensor |
| DE102004046529A1 (en) * | 2004-09-23 | 2006-03-30 | Mahle Filtersysteme Gmbh | Velocity distribution determining method for construction unit, involves finding distribution from time temperature sequence, where ranges of large temperature changes per unit of time is correlated with ranges of large flow velocity |
| DE102010047713B4 (en) * | 2009-10-12 | 2015-09-17 | BAM Bundesanstalt für Materialforschung und -prüfung | Measuring arrangement and method for the quantitative detection of spatial distributions of gas flows |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60243571A (en) * | 1984-05-18 | 1985-12-03 | Nippon Furnace Kogyo Kaisha Ltd | Measurement of speed in direction perpendicular to flow sectional plane |
-
1986
- 1986-07-22 JP JP17085086A patent/JPS6327766A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60243571A (en) * | 1984-05-18 | 1985-12-03 | Nippon Furnace Kogyo Kaisha Ltd | Measurement of speed in direction perpendicular to flow sectional plane |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6327766A (en) | 1988-02-05 |
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