DE628410C - Device for reducing the inclination sensitivity and increasing the pressure absorption of rotationally symmetrical measuring nozzles for measuring flow velocities - Google Patents

Device for reducing the inclination sensitivity and increasing the pressure absorption of rotationally symmetrical measuring nozzles for measuring flow velocities

Info

Publication number
DE628410C
DE628410C DEF75639D DEF0075639D DE628410C DE 628410 C DE628410 C DE 628410C DE F75639 D DEF75639 D DE F75639D DE F0075639 D DEF0075639 D DE F0075639D DE 628410 C DE628410 C DE 628410C
Authority
DE
Germany
Prior art keywords
rotationally symmetrical
measuring
flow
increasing
reducing
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
Application number
DEF75639D
Other languages
German (de)
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.)
WALTER FINDEISEN DR
Original Assignee
WALTER FINDEISEN DR
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
Priority claimed from DEF73776D external-priority patent/DE627040C/en
Application filed by WALTER FINDEISEN DR filed Critical WALTER FINDEISEN DR
Priority to DEF75639D priority Critical patent/DE628410C/en
Application granted granted Critical
Publication of DE628410C publication Critical patent/DE628410C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/14Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid

Description

Vorrichtung zur Verringerung der Neigungsempfindlichkeit und Erhöhung der Druckaufnahme rotationssymmetrischer, zur Messung von Strömungsgeschwindigkeiten. bestimmter Meßdüsen Gegenstand des Hauptpatents ist eine Vorrichtung zur manometrischen Messung und RegistrierungvonStrömungsgeschwindigkeiten, insbesondere von Windgeschwindigkeiten, bei der der Druckunterschied zwischen zwei verschiedenen rotationssymmetrischen Düsen, deren Symmetrieachsen senkrecht zur Strömungsebene stehen, gemessen wird.Device for decreasing tilt sensitivity and increasing it the pressure absorption more rotationally symmetrical, for the measurement of flow velocities. certain measuring nozzles The subject of the main patent is a device for manometric Measurement and registration of flow speeds, especially wind speeds, where the pressure difference between two different rotationally symmetrical Nozzles whose axes of symmetry are perpendicular to the flow plane is measured.

Zweck der vorliegenden Erfindung ist es, Messungen der Strömungsgeschwindigkeit mit den genannten Vorrichtungen auch dann unabhängig von der Strömungsrichtung ausführen zu können, wenn die Strömungsrichtung nicht nur innerhalb einer Ebene schwankt, sondern auch von dieser Ebene beträchtlich abweicht. Weiterhin wird durch die Erfindung erreicht, daß der Druckunterschied zwischen den beiden zur Messung benutzten rotationssymmetrisch en Düsen größer wird; dadurch wird die Messung erleichtert.The purpose of the present invention is to make measurements of the flow rate then also perform with the devices mentioned regardless of the direction of flow to be able to, if the flow direction does not only fluctuate within one plane, but also deviates considerably from this level. Furthermore, the invention achieves that the pressure difference between the two used for measurement is rotationally symmetrical the nozzle becomes larger; this makes the measurement easier.

Die Vorrichtung ist in der Abbildung dargestellt. Zwei rotationssymmetrisch gekrümmte Flächen werden mit ihren konvexen Seiten einander zugekehrt und in mäßigem Abstand voneinander so angeordnet, daß ihre Symmetrieachsen zusammenfallen und senkrecht zur Strömungsebene stehen. Die in der Abbildung angegebene Form der Vorrichtung ähnelt dem mittleren Teil eines Rotationshyperboloides. An der engsten Stelle zwischen den gekrümmten Flächen wird eine rotationssymmetrische Düse mit der Symmetrieachse senkrecht zur Strömungsebene angebracht. In der Abbildung ist eine Düste entsprechend Abb. 5 des Hauptpatents angegeben.The device is shown in the picture. Two rotationally symmetrical curved surfaces are turned with their convex sides facing each other and in moderate Spaced apart so that their axes of symmetry coincide and are perpendicular stand to the flow level. The form of the device indicated in the figure resembles the middle part of a rotational hyperboloid. At the narrowest point between the curved surfaces becomes a rotationally symmetrical nozzle with the axis of symmetry attached perpendicular to the flow plane. In the picture there is a corresponding nozzle Fig. 5 of the main patent indicated.

Die Anordnung der gekrümmten Flächen ,ähnelt im Querschnitt einem Venturirohr und hat auch eine .ganz ähnliche Wirkungsweise. Die gekrümmten Flächen bewirken ebenso wie die konischen Rohre der Venturidüse eine Gleichrichtung der Strömung an der engsten Stelle des Strömungsquerschnittes, der Meßstelle. Wenn die in der Abbildung dargestellte Anordnung relativ zur Strömungsebene geneigt wird, so wird dadurch die Strömung an der Meßstelle sowohl in ihrer Richtung als auch in ihrer Geschwindigkeit kaum beeinflußt. Auch wenn die an der Meßstelle angebrachte rotationssymmetrische Düse sehr neigungsempfindlich ist, wird wegen der gleichrichtenden Wirkung der gekrümmten Flächen der von der Düse aufgenommene Druck selbst bei beträchtlicher Neigung der Symmetrieachsen zur Strömungsebene nur unwesentlich geändert. Die Messung der Strömungsgeschwindigkeit wird also auf diese Weise praktisch unabhängig von Schwankungen- der Strömungsrichtung außerhalb der Strömungsebene (Inklination des Windes).. Der Bereich, in dem diese Unabhängigkeit gilt, hängt- von der Form der gekrümmten Flächen ab; beider in der Abbildung dargestellten Anordnung ierstreckt er sich bis zu etwa 3o° Neigung nach oben und unten.The arrangement of the curved surfaces resembles a cross-section Venturi tube and also has a very similar mode of action. The curved surfaces Just like the conical tubes of the Venturi nozzle, the Flow at the narrowest point of the flow cross-section, the measuring point. If the The arrangement shown in the figure is inclined relative to the flow plane, thus the flow at the measuring point is both in its direction and hardly influenced in their speed. Even if the one attached to the measuring point rotationally symmetrical nozzle is very sensitive to inclination, because of the rectifying Effect of the curved surfaces of the pressure absorbed by the nozzle even at considerable Inclination of the axes of symmetry to the flow plane changed only insignificantly. The measurement the flow velocity is practically independent of in this way Fluctuations - the direction of flow outside the Flow level (Inclination of the wind) .. The area in which this independence applies depends- on the shape of the curved surfaces; both arrangement shown in the figure it stretches up to about 30 ° inclination upwards and downwards.

Ähnlich wie beim venturirohr wird auch zwischen den gekrümmten Flächen infolge der Verengung des Strömungsquerschnittes die Strömungsgeschwindigkeit erhöht. Allerdings ist die Erhöhung der Strömungsgeschwindigkeit zwischen den gekrümmten Flächen erheblich kleiner als beim Venturirohr, aber immerhin so groß, daß- der von der rotationssymmetrischen Düse aufgenommene, von der Strömungsgeschwindigkeit abhängige Druckbeträchtlich gesteigert wird. Infolgedessen wird die Düse durch die beschriebene Anordnung der gekrürmnten Flächen leistungsfähiger. Die Messung der Strömungsgeschwindigkeit wird dadurch erleichtert.Similar to the venturi tube, there is also between the curved surfaces the flow velocity increases due to the narrowing of the flow cross-section. However, the increase in flow velocity is between the curved Areas considerably smaller than with the Venturi tube, but at least so large that the recorded by the rotationally symmetrical nozzle, from the flow velocity dependent pressure is increased considerably. As a result, the nozzle is through the described arrangement of the curved surfaces more efficient. The measurement of the This facilitates the flow rate.

Zur Messung von Strömungsgeschwindigkeiten ist die Messung der Druckdifferenz zwischen. zwei nahe beieinandersbehenden verschiedenen Düsen erforderlich. Die beiden rotationssymmetrischen Düsen, die nach dem Hauptpatent zur Geschwindigkeitsmessung erforderlich sind, können entweder jede für sich mit den beschriebenen gekrümmten Flächen ausgestattet werden, oder sie könne. beide übereinanderstehend zwischen ;ein Flächenpaar gebracht werden. In beiden Fällen ist die Messung der Strömungsgeschwindigkeit auf Grund einer Eichung ohne weiteres möglich.To measure flow velocities, it is necessary to measure the pressure difference between. requires two different nozzles in close proximity. The two rotationally symmetrical nozzles, which according to the main patent for speed measurement are required, can either be curved individually with the ones described Areas can be equipped, or they can. both standing on top of each other between ; a pair of surfaces can be brought. In both cases the measurement is the flow velocity possible due to a calibration.

Claims (1)

PATENTANSPRUCH: Vorrichtung zur Verringerung der Neigun,gsempfindEchkeit und Erhöhung der Druckaufnahme rotationssymmetrischer, zur Messung von Strömungsgeschwindigkeiten -nach Patent 62704o bestimmter Meßdüsen, deren Achsen senkrecht zur Strömungsebene stehen, dadurch gekennzeichnet, daß symmetrisch zur Strömungsebene zu beiden Seiten der Meßdüsen rotationssymmetrisch gekrümmte, mit den konvexen Seiten einander zugekehrte Leitflächen angebracht sind. PATENT CLAIM: Device for reducing the inclination, gssensEchkeit and increasing the pressure absorption of rotationally symmetrical, for measuring flow velocities -according to patent 62704o certain measuring nozzles, the axes of which are perpendicular to the flow plane, characterized in that symmetrically to the flow plane on both sides of the measuring nozzles, rotationally symmetrically curved, with the Convex sides facing guide surfaces are attached.
DEF75639D 1932-07-21 1933-05-28 Device for reducing the inclination sensitivity and increasing the pressure absorption of rotationally symmetrical measuring nozzles for measuring flow velocities Expired DE628410C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF75639D DE628410C (en) 1932-07-21 1933-05-28 Device for reducing the inclination sensitivity and increasing the pressure absorption of rotationally symmetrical measuring nozzles for measuring flow velocities

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEF73776D DE627040C (en) 1932-07-21 1932-07-21 Device for the manometric measurement of flow speeds, in particular wind speeds
DEF75639D DE628410C (en) 1932-07-21 1933-05-28 Device for reducing the inclination sensitivity and increasing the pressure absorption of rotationally symmetrical measuring nozzles for measuring flow velocities

Publications (1)

Publication Number Publication Date
DE628410C true DE628410C (en) 1936-04-03

Family

ID=34888400

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF75639D Expired DE628410C (en) 1932-07-21 1933-05-28 Device for reducing the inclination sensitivity and increasing the pressure absorption of rotationally symmetrical measuring nozzles for measuring flow velocities

Country Status (1)

Country Link
DE (1) DE628410C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055216A (en) * 1957-07-01 1962-09-25 Ohio Thermometer Company Wind speed meter
FR2497575A1 (en) * 1981-01-08 1982-07-09 Fgp Instrumentation MANOSENSIBLE DEVICE FOR TAKING STATIC PRESSURE AND ANEMOMETRIC MATERIAL, IN PARTICULAR FOR AN AIRCRAFT
EP0422081A1 (en) * 1988-06-23 1991-04-17 Us Commerce Quad-disk static pressure probe.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3055216A (en) * 1957-07-01 1962-09-25 Ohio Thermometer Company Wind speed meter
FR2497575A1 (en) * 1981-01-08 1982-07-09 Fgp Instrumentation MANOSENSIBLE DEVICE FOR TAKING STATIC PRESSURE AND ANEMOMETRIC MATERIAL, IN PARTICULAR FOR AN AIRCRAFT
EP0056747A1 (en) * 1981-01-08 1982-07-28 Fgp Instrumentation Anemometer pole for measuring the relative speed between a fluid and a support, especially for an aircraft
EP0422081A1 (en) * 1988-06-23 1991-04-17 Us Commerce Quad-disk static pressure probe.
EP0422081A4 (en) * 1988-06-23 1992-01-08 Us Commerce Quad-disk static pressure probe

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