DE19714417A1 - Flow resistance characteristic measuring device - Google Patents

Flow resistance characteristic measuring device

Info

Publication number
DE19714417A1
DE19714417A1 DE1997114417 DE19714417A DE19714417A1 DE 19714417 A1 DE19714417 A1 DE 19714417A1 DE 1997114417 DE1997114417 DE 1997114417 DE 19714417 A DE19714417 A DE 19714417A DE 19714417 A1 DE19714417 A1 DE 19714417A1
Authority
DE
Germany
Prior art keywords
medium
measuring device
flow
rotating
rotation
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Withdrawn
Application number
DE1997114417
Other languages
German (de)
Inventor
Alexander Spethmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1997114417 priority Critical patent/DE19714417A1/en
Publication of DE19714417A1 publication Critical patent/DE19714417A1/en
Withdrawn legal-status Critical Current

Links

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
    • G01M9/02—Wind tunnels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer

Abstract

The measuring device uses one or more rotational bodies (1). Each rotational body contains a gas or fluid medium (4) in which a body (7) to be tested is suspended, to evaluate the resulting flow resistance characteristics. The rotation of the medium can be achieved using a rotating container, whose walls are coupled to acceleration of the medium by shear forces. The body or bodies surrounded by the medium are realisably fixed, so that a relative movement between them and the rotating medium is achieved. The movement of the rotating medium and the flow pressure acting on the body due to the rotation of the medium can be measured continuously or at desired times. The rotational body may be a vehicle tyre, which is filled with a given quantity of water, providing a parallel flow stream with the flow pressure acting on the test body detected by a lever (8) acting on a pressure sensor (9).

Description

Die Erfindung betrifft ein Meßgerät nach dem Oberbegriff des Anspruchs 1.The invention relates to a measuring device according to the preamble of claim 1.

Die Größe des Strömungsdrucks auf beliebig geformte Körper soll mittels einem flüssigen oder gasförmigen nicht turbulenten parallel strömenden Medium gemessen werden. Dabei soll die Strömungsgeschwindigkeit in einer möglichst großen Band­ breite variierbar sein, wobei eine Turbulenz der Strömung auch bei hohen Ge­ schwindigkeiten nicht auftreten soll. Aus Raum- und Mobilitätsgründen sollen die Abmessungen des Strömungskanals möglichst gering sein.The size of the flow pressure on any shaped body should be by means of a liquid or gaseous non-turbulent medium flowing in parallel will. The flow velocity should be as large as possible width can be varied, with turbulence of the flow even at high Ge speed should not occur. For space and mobility reasons, the Dimensions of the flow channel should be as small as possible.

Bei den bisher als Wasserströmungs- oder Windkanälen bekannten Strömungskanä­ len für Flüssigkeiten und Gase können nur mit relativ großem technischen Aufwand d. h. sehr leistungsfähigen Pumpen, großem Wasservolumen und Beruhigungsstrecken bzw. mit großen Windturbinen und Windkanalquerschnitten schnelle nicht turbulente parallele Strömungen erzeugt werden.In the flow channels previously known as water flow or wind channels len for liquids and gases can only with relatively great technical effort d. H. very powerful pumps, large water volume and calming sections or with large wind turbines and wind tunnel cross sections, fast non-turbulent ones parallel flows are generated.

Der bisher erforderliche hohe technische Aufwand, die erhebliche Größe der Appa­ raturen und die daraus resultierenden hohen Investitions- und Gebrauchskosten und schließlich die Ortsgebundenheit erschweren das Durchführen von Strömungsversu­ chen in Flüssigkeiten oder Gasen.The high technical effort required so far, the considerable size of the appa and the resulting high investment and usage costs and Finally, the fact that it is tied to a location makes it difficult to carry out flow tests in liquids or gases.

Der Erfindung liegt die Aufgabe zugrunde diese Nachteile zu beseitigen und wo immer es nützlich und erforderlich erscheint, es zu ermöglichen qualifizierte Strö­ mungsversuche mit Flüssigkeiten oder Gasen durchzuführen.The invention has for its object to eliminate these disadvantages and where Whenever it appears useful and necessary to enable qualified streams experiments with liquids or gases.

Diese Aufgabe wird bei einer gattungsgemäßen Einrichtung durch die kennzeichnen­ den Merkmale des Anspruchs 1 gelöst.This task is characterized in a generic device by the solved the features of claim 1.

Die Strömung des Mediums wird durch einen das Medium umschließenden relativ einfach herzustellenden Rotationsbehälter erzeugt.The flow of the medium becomes relative by a medium enclosing the medium easy-to-produce rotating container.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß mit einer nicht ortsgebundenen handlichen, preisgünstig herzustellenden und relativ ein­ fach zu bedienenden Meßeinrichtung für Strömungsmessungen an beliebig geformten Körpern sehr schnelle parallele nicht turbulente Strömungen erzeugt werden kön­ nen. The advantages that can be achieved with the invention are in particular that with a handy, inexpensive to produce and not a local one Easy to use measuring device for flow measurements on any shape Bodies very fast parallel non-turbulent flows can be generated nen.  

Ein Ausführungsbeispiel der Erfindung ist in Fig. 1 der Zeichnung dargestellt und wird im folgenden näher beschrieben:
Ein Autoreifen (1) kann durch eine Bohrmaschine (2) über eine Gummischeibe (3) in eine beliebige Rotationsgeschwindigkeit gebracht werden.An embodiment of the invention is shown in Figure 1 of the drawing and is described in more detail below:
A car tire ( 1 ) can be brought into any rotational speed by a drilling machine ( 2 ) via a rubber disc ( 3 ).

Dabei wird bei rotierendem Reifen das innerhalb des Reifens befindliche Wasser (4) infolge von Scherkräften mitbewegt und durch die Fliehkraft innerhalb des Rei­ fens nach außen gedrückt (5).When the tire rotates, the water ( 4 ) inside the tire is moved as a result of shear forces and is pushed outwards by the centrifugal force within the tire ( 5 ).

Mit dem Schlitten (6) kann ein zu prüfender Körper (7) in das Wasser (5) einge­ taucht werden. Bei Rotation wirkt auf den Körper ein Strömungsdruck, der wieder­ um mittels des Hebels (8) auf einen Drucksensor (9) wirkt.With the carriage ( 6 ), a body ( 7 ) to be tested can be immersed in the water ( 5 ). When rotating, a flow pressure acts on the body, which in turn acts on a pressure sensor ( 9 ) by means of the lever ( 8 ).

Der Drucksensor (9) übermittelt auf elektrischem Wege den Meßwert des jeweili­ gen Drucks über das Interface (11) zum PC (10).The pressure sensor ( 9 ) transmits the measured value of the respective pressure via the interface ( 11 ) to the PC ( 10 ).

Mittels Software werden die Meßwerte aufbereitet und können auf einen Monitor (12) in Form eines Graphen, als Ziffern oder Säulendiagramm dargestellt werden. Für spätere Auswertungen können die Meßdaten ausgedruckt oder im PC gespei­ chert werden.The measured values are processed by means of software and can be displayed on a monitor ( 12 ) in the form of a graph, as a number or as a bar chart. For later evaluations, the measurement data can be printed out or saved on the PC.

Ein Camcorder (13) kann das Strömungsbild der umströmten Probe aufnehmen, auf eine Video-Band speichern und/oder auf einem Monitor (14) sichtbar werden las­ sen.A camcorder ( 13 ) can record the flow pattern of the sample flowing around it, store it on a video tape and / or make it visible on a monitor ( 14 ).

Die Strömungsgeschwindigkeit des Wassers wird über die Rotationsgeschwindigkeit des Reifens mit Hilfe eines Fahrrad-Computers (15) ermittelt.The flow rate of the water is determined via the rotation speed of the tire using a bicycle computer ( 15 ).

Claims (4)

1. Meßeinrichtung zum Messen strömungsabhängiger Größen bei einem oder mehre­ ren in ein strömendes Medium eingetauchten Körper bzw. Körpern, dadurch gekennzeichnet, daß die Umströmung des oder der eingetauchten Körpers bzw. Körper durch ein in Rotation versetztes flüssiges oder gasförmiges Medium verursacht wird.1. Measuring device for measuring flow-dependent sizes in one or more ren immersed in a flowing medium body or bodies, characterized in that the flow around the immersed body or body is caused by a rotating liquid or gaseous medium. 2. Meßeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Rotation des Mediums durch einen rotierenden Behälter verursacht wird, dessen Wandungen bei Beschleunigung mit dem Medium durch Scherkräfte gekop­ pelt sind und die Druckwirkungen aller Flieh- und Schwerkräfte des Mediums auf­ nehmen.2. Measuring device according to claim 1, characterized, that the rotation of the medium is caused by a rotating container, the walls of which, when accelerated with the medium, are coupled by shear forces pelt and the pressure effects of all centrifugal and gravitational forces on the medium to take. 3. Meßeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der oder die vom Medium umgebene bzw. umgebenen Körper bei Bedarf lösbar so fixiert ist bzw. sind, daß zwischen ihm bzw. ihnen und dem in Rotation ge­ brachten Medium eine Relativbewegung besteht.3. Measuring device according to claim 2, characterized, that the one or more bodies surrounded by the medium can be detached if necessary is or are so fixed that between him or her and the one in rotation brought medium there is a relative movement. 4. Meßeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Bewegungsgröße des rotierenden Mediums und der infolge Rotation des Mediums auf den oder die Körper wirkende Strömungsdruck ständig oder zu belie­ bigen Zeitpunkten gemessen werden kann.4. Measuring device according to claim 3, characterized, that the amount of movement of the rotating medium and that due to rotation of the Medium on the body or the body pressure flow pressure constantly or to other times can be measured.
DE1997114417 1997-04-08 1997-04-08 Flow resistance characteristic measuring device Withdrawn DE19714417A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997114417 DE19714417A1 (en) 1997-04-08 1997-04-08 Flow resistance characteristic measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997114417 DE19714417A1 (en) 1997-04-08 1997-04-08 Flow resistance characteristic measuring device

Publications (1)

Publication Number Publication Date
DE19714417A1 true DE19714417A1 (en) 1998-10-15

Family

ID=7825754

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997114417 Withdrawn DE19714417A1 (en) 1997-04-08 1997-04-08 Flow resistance characteristic measuring device

Country Status (1)

Country Link
DE (1) DE19714417A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102288382A (en) * 2011-05-06 2011-12-21 哈尔滨工程大学 Pull-type fluid resistance test device
DE102011103703A1 (en) 2011-05-31 2013-01-31 Alexander Spethmann Support structure for rotation flow channel of mounting plate, has devices that are attached and moved along certain degrees of freedom of samples which are secured at support main portion
CN111272384A (en) * 2020-02-21 2020-06-12 安徽皖仪科技股份有限公司 Detection method and device for detecting flow resistance by pressure drop contrast
CN111721496A (en) * 2019-03-18 2020-09-29 中国科学院宁波材料技术与工程研究所 Resistance testing device and method under high Reynolds number in fluid
CN113740030A (en) * 2021-11-05 2021-12-03 水利部交通运输部国家能源局南京水利科学研究院 Pipeline resistance parameter detection system and detection method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102288382A (en) * 2011-05-06 2011-12-21 哈尔滨工程大学 Pull-type fluid resistance test device
DE102011103703A1 (en) 2011-05-31 2013-01-31 Alexander Spethmann Support structure for rotation flow channel of mounting plate, has devices that are attached and moved along certain degrees of freedom of samples which are secured at support main portion
DE102011103703B4 (en) * 2011-05-31 2021-07-01 Alexander Spethmann Bracket for a rotary flow channel
CN111721496A (en) * 2019-03-18 2020-09-29 中国科学院宁波材料技术与工程研究所 Resistance testing device and method under high Reynolds number in fluid
CN111272384A (en) * 2020-02-21 2020-06-12 安徽皖仪科技股份有限公司 Detection method and device for detecting flow resistance by pressure drop contrast
CN113740030A (en) * 2021-11-05 2021-12-03 水利部交通运输部国家能源局南京水利科学研究院 Pipeline resistance parameter detection system and detection method

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