JPS5754868A - Flow velocity and flow rate measuring device - Google Patents
Flow velocity and flow rate measuring deviceInfo
- Publication number
- JPS5754868A JPS5754868A JP55130292A JP13029280A JPS5754868A JP S5754868 A JPS5754868 A JP S5754868A JP 55130292 A JP55130292 A JP 55130292A JP 13029280 A JP13029280 A JP 13029280A JP S5754868 A JPS5754868 A JP S5754868A
- Authority
- JP
- Japan
- Prior art keywords
- eddy current
- low
- flow velocity
- current generating
- 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
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
-
- 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
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
- G01F1/3259—Means for detecting quantities used as proxy variables for swirl for detecting fluid pressure oscillations
-
- 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
- G01F1/325—Means for detecting quantities used as proxy variables for swirl
- G01F1/3273—Means for detecting quantities used as proxy variables for swirl for detecting fluid speed oscillations by thermal sensors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
PURPOSE: To improve measuring performance in low-density of low-speed condition, in a flow velocity measuring equipment provided with a plume-like eddy current generating body in a fluid body, by making such an arrangement that width of section of the eddy current generating body is to become smaller toward the downstream and that the surface opposite to the flow is to become concave.
CONSTITUTION: A pulme-like eddy current generating body 21 is provided in a fluid body. A surface 21C opposite to a flow is formed into a concavity, and the ratio between the curvature radius R and a length (d) of the concavity 21C is selected within a range of R/d=1.4W2.5. The eddy current generating body is made of a surface 21B, width of which section is to become smaller toward the down-stream. This surface 21B is provided with a pair of eddy current detecting unit consisting of a diaphragm 22, an electrode 23, an insulation material 24, a charged liquid 25 and a through passage 26, etc. As corner of the front surface forms an acute angle, and since exfoliation of the fluid body hitting the concave section is remarkable, strength of the eddy current is increased. And therefore, flow velocity can be measured positively even in the case of a gaseous body of low fluid density, etc., and instrumental error characteristics in the low flow velocity region can be improved.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55130292A JPS5754868A (en) | 1980-09-19 | 1980-09-19 | Flow velocity and flow rate measuring device |
GB8128161A GB2084324B (en) | 1980-09-19 | 1981-09-17 | Vortex shedding fluid flowmeter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55130292A JPS5754868A (en) | 1980-09-19 | 1980-09-19 | Flow velocity and flow rate measuring device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5754868A true JPS5754868A (en) | 1982-04-01 |
JPS6331041B2 JPS6331041B2 (en) | 1988-06-22 |
Family
ID=15030819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55130292A Granted JPS5754868A (en) | 1980-09-19 | 1980-09-19 | Flow velocity and flow rate measuring device |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5754868A (en) |
GB (1) | GB2084324B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61500080A (en) * | 1983-09-13 | 1986-01-16 | ザ フオツクスボロ カンパニ− | Vortex instrument with small flow path size |
JPS6235225U (en) * | 1985-08-20 | 1987-03-02 | ||
JP2007147418A (en) * | 2005-11-28 | 2007-06-14 | Oval Corp | Vortex flowmeter having vibration transmitting means |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4694702A (en) * | 1984-09-12 | 1987-09-22 | Tokico Ltd. | Vortex shedding flowmeter |
US4718283A (en) * | 1987-01-30 | 1988-01-12 | Itt Corporation | Vortex meter body |
DE19632198C1 (en) * | 1996-08-09 | 1998-03-12 | Bosch Gmbh Robert | Device for measuring the mass of a flowing medium |
US6938496B2 (en) | 2001-09-04 | 2005-09-06 | Endress + Hauser Flowtec Ag | Vortex flow pickup |
DE10249543A1 (en) * | 2002-10-23 | 2004-05-06 | Endress + Hauser Flowtec Ag, Reinach | vortex |
US7600436B2 (en) | 2006-07-21 | 2009-10-13 | Endress + Hauser Flowtec Ag | Measuring system with a flow conditioner arranged at an inlet of a measuring tube |
US7882751B2 (en) | 2007-07-19 | 2011-02-08 | Endress + Hauser Flowtec Ag | Measuring system with a flow conditioner for flow profile stabilization |
DE102007063372A1 (en) * | 2007-12-30 | 2009-07-02 | Endress + Hauser Flowtec Ag | Measuring system for a medium flowing in a process line |
US8042411B2 (en) * | 2009-06-04 | 2011-10-25 | Invensys Systems, Inc. | Small line size vortex flowmeter |
-
1980
- 1980-09-19 JP JP55130292A patent/JPS5754868A/en active Granted
-
1981
- 1981-09-17 GB GB8128161A patent/GB2084324B/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61500080A (en) * | 1983-09-13 | 1986-01-16 | ザ フオツクスボロ カンパニ− | Vortex instrument with small flow path size |
JPS6235225U (en) * | 1985-08-20 | 1987-03-02 | ||
JP2007147418A (en) * | 2005-11-28 | 2007-06-14 | Oval Corp | Vortex flowmeter having vibration transmitting means |
Also Published As
Publication number | Publication date |
---|---|
GB2084324B (en) | 1984-08-08 |
JPS6331041B2 (en) | 1988-06-22 |
GB2084324A (en) | 1982-04-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5754868A (en) | Flow velocity and flow rate measuring device | |
JPS607207B2 (en) | pitot tube flowmeter | |
FR2373039A1 (en) | MASS FLOW DETECTOR | |
JPS59500388A (en) | Vortex generator of vortex flowmeter | |
JPS5697830A (en) | Karman vortex flow meter | |
Mujumdar et al. | Vortex shedding from slender cylinders of various cross sections | |
US4424714A (en) | Vortex generating device | |
JPS56104252A (en) | Flow velocity and rate measuring apparatus | |
JPS56167824A (en) | Electronic controlled fuel injection device | |
US4478087A (en) | Karman's vortex street flow meter | |
JPS55122120A (en) | Fluid measuring device | |
JPS5655813A (en) | Karman vortex flowmeter | |
JPS52132866A (en) | Flow velocity measuring device | |
JPS55158514A (en) | Vortex type flow meter | |
JPS55160812A (en) | Monitoring method for flow rate of gas | |
JPS5431785A (en) | Eddy current type current meter | |
JPS5479068A (en) | Measuring apparatus of velocity and rate of flow | |
JPS54147864A (en) | Measuring apparatus of velocity and rate of flow | |
MOUSSA | The near-field flow of an axisymmetric jet in a cross-stream[Ph. D. Thesis] | |
JPS5389764A (en) | Eddy current flow meter | |
JPS5535245A (en) | Karman vortex flow meter | |
JPS5569022A (en) | Flowmeter | |
JPS5599028A (en) | Measuring device for flow rate | |
JPS5614114A (en) | Karman vortex flowmeter | |
BARNHART et al. | Experimental Investigation of Unsteady Shock Wave Turbulent Boundary Layer Interactions About a Blunt Fin(Ph. D. Thesis, Final Report) |