Last edited by Magami
Sunday, May 3, 2020 | History

2 edition of Vortex shedding flow meter performance at high flow velocities found in the catalog.

Vortex shedding flow meter performance at high flow velocities

J. D. Siegwarth

Vortex shedding flow meter performance at high flow velocities

by J. D. Siegwarth

  • 294 Want to read
  • 2 Currently reading

Published by U.S. Dept. of Commerce, National Bureau of Standards in Gaithersburg, MD .
Written in English

    Subjects:
  • Flow meters.,
  • Space shuttles -- Propulsion systems.,
  • Hydraulics.

  • Edition Notes

    StatementJ.D. Siegwarth.
    SeriesNBS technical note -- 1302.
    ContributionsUnited States. National Bureau of Standards., George C. Marshall Space Flight Center.
    The Physical Object
    Paginationv, 86 p. :
    Number of Pages86
    ID Numbers
    Open LibraryOL17657740M

    Vortex Shedding Flow Meters and Pitot Tubes Industrial Vortex Flow Meters Suitable for flow rate or flow totalization measurements, industrial grade and for use with many fluid types. Compact, high performance transmitters, designed to accurately measure .   DAMPEN THE FLOW VELOCITY FLUCTUATIONS, without flow smoothing dampers it will be impossible to use the stream of the frequencies of the vortex generated by these meter. The dampeners to use must.

    CX Series CoolPoint Vortex Shedding Flowmeter Installation and Operation Manual UNIVERSAL FLOW MONITORS, INC. E. Nine Mile Road PO BOX HAZEL PARK MI USA P. ; F. Vortex flowmeters, also know as vortex shedding flowmeters or oscillatory flowmeters, measure the vibrations of the downstream vortexes caused by a barrier in the moving stream. The vibrating frequency of the vortex shedding is related to the velocity of the flow.

    Multivariable Vortex MASS FLOW METERS 1/2" to 6" Vortex Mass Flow Meters in Stock Methane, Bio-Gas, Air or Water Better than Thermal for Natural Gas SS Flow Bodies in Stock Read P, T & V for mass flow mA, Frequency, Pulse, ModBus RTU outputs. Power with 24 VDC Accuracy: +/- 1% of reading in water Order Online. Vortex-shedding flowmeters differ from each other in the type of sensor used to detect the vortices. Some of these flowmeters use a metal sphere or disc that shifts back and forth as the vortices flow past it. A magnetic coil counts the object's oscillations. A variation on this theme uses a bar which flexes as the vortices pass, as shown below.


Share this book
You might also like
Telesio, the first of the moderns.

Telesio, the first of the moderns.

Suriname tourism development plan

Suriname tourism development plan

The art and technique of painting on porcelain.

The art and technique of painting on porcelain.

Chepangs, a study in continuity and change

Chepangs, a study in continuity and change

What works is what matters

What works is what matters

Dancers and dancing

Dancers and dancing

Essex dance directory.

Essex dance directory.

Final report of the Eight Meeting of the Inter-governmental Council for the Coordination of Information and Communication of Non-aligned countries

Final report of the Eight Meeting of the Inter-governmental Council for the Coordination of Information and Communication of Non-aligned countries

Imperial unity

Imperial unity

Terminology for the theory of machines and mechanisms

Terminology for the theory of machines and mechanisms

Systems analysis and simulation 1980

Systems analysis and simulation 1980

Further matters relating to the nomination of John J. Knapp

Further matters relating to the nomination of John J. Knapp

liturgy and other divine offices of the church.

liturgy and other divine offices of the church.

Freedom and authority in education

Freedom and authority in education

Health status and health policy

Health status and health policy

Vortex shedding flow meter performance at high flow velocities by J. D. Siegwarth Download PDF EPUB FB2

Get this from a library. Vortex shedding flow meter performance at high flow velocities. [J D Siegwarth; United States.

National Bureau of Standards.; George C. Marshall Space Flight Center.]. NASA Conference Publication ()= 2 Siegwarth, J. Vortex shedding flow meter performance at high flow velocities.

National Bureau of Standards Technical Note No. (October ) 3 Siegwarth, J. Vortex shedding flowmeter for fluids at high flow by: 1. Baldrige Performance Excellence Program; Manufacturing Extension Partnership (MEP) Metering of Fluids at High Velocities with Vortex Shedding Flowmeters.

Published. March 1, Author(s) NIST Pub Series. Technical Note (NIST TN) Pub Type. NIST Pubs. Chemical engineering and processing and Flow metrology and rheology. Created Author: James D. Siegwarth. The hydrogen gas flow velocities in other ducts exceed the maximum for gas flow measurement by more than a factor of 3.

The results presented here show from water flow tests that vortex shedding flow meters of the appropriate design can measure water flow to velocities in excess of 55 m/s, which is a Reynolds number of about 2 : J.

Siegwarth. VORTEX SHEDDING FLOW METER PERFORMANCE AT HIGH FLOW VELOCITIES S. AUTHOR(S) J. Siegwarth 6. PERFORMING ORGANIZATION (If joint or other than NOS, sea instructions) 7. Contract/Grant No. H NATIONAL BUREAU OF STANDARDS DEPARTMENT OF COMMERCE 0.

Type of Report & Period Covered WASHINGTON, D.C. Vortex shedding flowmeters detect and measure the velocity of liquid and gas vortices that are formed when the aerodynamics of a gas or liquid stream are disrupted.

Flow Damping adjustable between and seconds. Process Temperature Damping adjustable between and seconds (MTA Option Only). Response time Three vortex shedding cycles or ms, whichever is greater, maximum required to reach % of actual input with the minimum damping ( seconds).

Turn-on time HART analogFile Size: 2MB. Vortex flow meters are a direct type of flow-measuring device with operating fundamentals based on the Von Karman Vortex Street principle. In this instrument, a bluff body or shedder bar is arranged at the center of flow path.

When the fluid passes through it, disturbances in the flow called vortices are alternately formed on both sides of the shedder. Vortex flow meters operate under the vortex shedding principle, where an oscillating vortexes occur when a fluid such as water flow past a bluff (as opposed to streamlined) body.

The frequency that the vortexes are shed depend on the size and shape of the body. If the volumetric flow rate through a vortex flow meter falls below the low-flow cutoff value, however, the flow meter’s signal goes completely to zero, indicating no flow at all.

This idiosyncrasy makes vortex flow meters entirely unsuitable in applications where the desired flow measurement range extends all the way down to zero. Vortex flow meters offer many advantages for flow measurement including easy installation without impulse lines, no moving parts to maintain or repair, less leak potential and a wide flow turndown range.

Vortex meters also offer very low power consumption, allowing for use in remote areas. Additionally, Vortex meters are unique in that they can accommodate liquids, gasses, steam and corrosive applications.

Vortex flow meters are also able to withstand high process. The VersaFlow Vortex Shedding flow meter detects the vortices that are created by a process medium going past a bluff body. The frequency of these vortices can be equated into flow velocity, which, in turn, is used to calculate volumetric flow rate.

Little resistance to flow. Disadvantages of vortex shedding flowmeters: At low flows, pulses are not generated and the flowmeter can read low or even zero. Maximum flowrates are often quoted at velocities of 80 or m/s, which would give severe problems in steam systems, especially if the steam is wet and/or dirty.

We have developed the ultrasonic vortex flow meter "ULTRA YEWFLO" specifically for liquid measurement. This flow meter detects the vortex shedding frequency that is proportional to the flowrate. The flow meter has a simple construction with no moving parts which means that it is not affected by clogging caused by slurry or rust inside the pipe.

Vortex-shedding flowmeters typically operate at velocities from approximately meters to six meters per second and turn off at low flowrates so turndown is typically less than to Differential-pressure primary flow elements can operate over wide ranges of flow; however, their differential-pressure transmitter(s) often limit turndown to approximately to Vortex Shedding Flow Meter Operating under the same principle of the vortex shedding measurement, this type of vortex flow meter is suitable for viscous,clean, or dirty waterlike liquids that are compatible with brass, PVDF, and FKM.

These applications are found in most process industries, including rubber, steel, fabrication, manufacturing, refining, paper, chemical, food, petrochemical and. A number of vortex shedding flowmeter designs for flow measurements in liquid oxygen ducts on the space shuttle main engines have been tested in a high head.

اندازه گیری فرکانس گردابی Vortex shedding flow meter جهت اندازه گیری دبی مایعات دارای ویسکوزیته پایین و گازها و بخارها. In fluid dynamics, vortex shedding is an oscillating flow that takes place when a fluid such as air or water flows past a bluff (as opposed to streamlined) body at certain velocities, depending on the size and shape of the body.

In this flow, vortices are created at the back of the body and detach periodically from either side of the body forming a Von Kármán vortex street.

Performance in two phase flow Vortex flow meters are normally used for single phase flow. Generally, vortex flow meters are not used in two-phase flow metering mainly because of the high over-reading inherent to these flow conditions. However, the proposed fibre optic flow meter has overcome these limitation as will be demonstrated below.

Vortex flow meters are long-lasting and robust with field-proven sensor technology and high reliability, improving plant efficiency and reducing operating costs.

Yokogawa's digitalYEWFLO vortex meters feature a unique sensor design that accurately identifies and eliminates noise, resulting in stable and accurate measurements without any need.To determinewhether a vortexsheddingmeter can measure flow at high flow velocities it is necessary to demonstrate that vortices are shed from a vane with a regularperiod thatvariesin a repeatableway .Flow Monitors Vortex Shedding Flowmeter and Temperature Transmitter CT 1/ inch Flow and Temperature Transmitter Maximum flow ranges from GPM ( LPM) Max pressure PSI (20 Bar) Temperature range °F (°C) Flow/Temp CoolPoint™ with Rotatable Enclosure Viton® is a registered trademark for DuPont Performance Elastomers.