JPS5657913A - Flow speed or flow rate measuring device - Google Patents

Flow speed or flow rate measuring device

Info

Publication number
JPS5657913A
JPS5657913A JP13388079A JP13388079A JPS5657913A JP S5657913 A JPS5657913 A JP S5657913A JP 13388079 A JP13388079 A JP 13388079A JP 13388079 A JP13388079 A JP 13388079A JP S5657913 A JPS5657913 A JP S5657913A
Authority
JP
Japan
Prior art keywords
vortex
hole
vortex generator
alternating current
upstream side
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
Application number
JP13388079A
Other languages
Japanese (ja)
Inventor
Hiroshi Kobayashi
Toru Kita
Takeshi Fujishiro
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP13388079A priority Critical patent/JPS5657913A/en
Publication of JPS5657913A publication Critical patent/JPS5657913A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • G01F1/3209—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters using Karman vortices
    • G01F1/3218—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow using swirl flowmeters using Karman vortices bluff body design

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To stabilize the generation of vortex and at the same time increase the accuracy of measurement under any conditions of operation, by increasing the length of the upstream side more than that of the downstream side of the vortex generator at the upstream side among the vortex generators having the pierced holes. CONSTITUTION:The vortex generator 2a with the lower bottoms d1 and d2 of an isosceles trapezoid plus the rectangular vortex generator 2b having the length d3 of the side are disposed at the upstream side within the sucked air path 3 in such way that the pierced hole 1 may be formed. When the sucked air flows, the Karman vortex B is produced alternately across the generators 2a and 2b, and at the same time the alternating current flows in the same cycle also within the hole 1. If the relations of d1-d3 of the vortex generator having such constitution as mentioned above are set as d1>d2 and d2approx.=d3 each, the fluctuation factor of the alternating current is decreased. Thus the detector 4 is installed within the hole 1 of the vortex generator to measure the alternating current flowing thrugh the hole 1. In such way, a measurement is possible for the flow rate of the Karman vortex having a small flucttuation factor.
JP13388079A 1979-10-17 1979-10-17 Flow speed or flow rate measuring device Pending JPS5657913A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13388079A JPS5657913A (en) 1979-10-17 1979-10-17 Flow speed or flow rate measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13388079A JPS5657913A (en) 1979-10-17 1979-10-17 Flow speed or flow rate measuring device

Publications (1)

Publication Number Publication Date
JPS5657913A true JPS5657913A (en) 1981-05-20

Family

ID=15115233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13388079A Pending JPS5657913A (en) 1979-10-17 1979-10-17 Flow speed or flow rate measuring device

Country Status (1)

Country Link
JP (1) JPS5657913A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59500926A (en) * 1982-04-05 1984-05-24 ザ　フオツクスボロ　カンパニ− Swirl generating body of aperture contour
US4485679A (en) * 1981-12-10 1984-12-04 Itt Industries, Inc. Fluid flowmeter
WO1995025943A1 (en) * 1994-03-23 1995-09-28 Schlumberger Industries S.A. Vortex flowmeter with a double obstruction
CN105004383A (en) * 2015-08-11 2015-10-28 哈尔滨工程大学 Vortex shedding flowmeter with jet bionic type vortex generating body
CN105004384A (en) * 2015-08-11 2015-10-28 哈尔滨工程大学 Vortex generating body based on bionic jet resistance-reducing principle
CN112525272A (en) * 2019-09-17 2021-03-19 Abb瑞士股份有限公司 Vortex street flowmeter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485679A (en) * 1981-12-10 1984-12-04 Itt Industries, Inc. Fluid flowmeter
JPS59500926A (en) * 1982-04-05 1984-05-24 ザ　フオツクスボロ　カンパニ− Swirl generating body of aperture contour
WO1995025943A1 (en) * 1994-03-23 1995-09-28 Schlumberger Industries S.A. Vortex flowmeter with a double obstruction
FR2717896A1 (en) * 1994-03-23 1995-09-29 Schlumberger Ind Sa Swirl fluid meter with a double obstacle.
CN105004383A (en) * 2015-08-11 2015-10-28 哈尔滨工程大学 Vortex shedding flowmeter with jet bionic type vortex generating body
CN105004384A (en) * 2015-08-11 2015-10-28 哈尔滨工程大学 Vortex generating body based on bionic jet resistance-reducing principle
CN112525272A (en) * 2019-09-17 2021-03-19 Abb瑞士股份有限公司 Vortex street flowmeter

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