GB2002520A - Fluid flow measuring apparatus - Google Patents

Fluid flow measuring apparatus

Info

Publication number
GB2002520A
GB2002520A GB7832904A GB7832904A GB2002520A GB 2002520 A GB2002520 A GB 2002520A GB 7832904 A GB7832904 A GB 7832904A GB 7832904 A GB7832904 A GB 7832904A GB 2002520 A GB2002520 A GB 2002520A
Authority
GB
United Kingdom
Prior art keywords
bar
shedding
vortex
cross
fluid flow
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.)
Granted
Application number
GB7832904A
Other versions
GB2002520B (en
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.)
Ricardo PLC
Original Assignee
Ricardo and Co Engineers 1927 Ltd
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 Ricardo and Co Engineers 1927 Ltd filed Critical Ricardo and Co Engineers 1927 Ltd
Priority to GB7832904A priority Critical patent/GB2002520B/en
Publication of GB2002520A publication Critical patent/GB2002520A/en
Application granted granted Critical
Publication of GB2002520B publication Critical patent/GB2002520B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01P5/01—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by using swirlflowmeter

Abstract

A fluid flow meter, for example for measuring the velocity of an air flow, comprises a flow duct 20 having a transverse vortex-shedding bar 22, and ultrasonic or other detector means 23, 25 for sensing the shedding of Karman vortices from the bar as the fluid flow passes the bar, and means 51, 60 for converting the alternating output signal of the detector means into a signal of square-wave form for operating a digital counter 63, and one or more additional cross-members 30 extending across the flow duct downstream of the flow section where the vortex-sensing means operates, the additional cross-member 30 extending transversely to the vortex-shedding bar 22 and being of cylindrical or aerofoil cross-section, or of rectangular or other cross-section having a flat upstream face parallel to the bar 22. The provision of the additional cross- member 30 is found to improve the regularity of the vortex-shedding from the bar 22 and hence the accuracy of the meter reading. <IMAGE>
GB7832904A 1977-08-11 1978-08-10 Fluid flow measuring apparatus Expired GB2002520B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7832904A GB2002520B (en) 1977-08-11 1978-08-10 Fluid flow measuring apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3378277 1977-08-11
GB7832904A GB2002520B (en) 1977-08-11 1978-08-10 Fluid flow measuring apparatus

Publications (2)

Publication Number Publication Date
GB2002520A true GB2002520A (en) 1979-02-21
GB2002520B GB2002520B (en) 1982-03-31

Family

ID=26262017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7832904A Expired GB2002520B (en) 1977-08-11 1978-08-10 Fluid flow measuring apparatus

Country Status (1)

Country Link
GB (1) GB2002520B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029492A1 (en) * 1979-11-21 1981-06-03 Bopp &amp; Reuther Aktiengesellschaft Flow meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029492A1 (en) * 1979-11-21 1981-06-03 Bopp &amp; Reuther Aktiengesellschaft Flow meter

Also Published As

Publication number Publication date
GB2002520B (en) 1982-03-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee