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Sunday, April 19, 2020 | History

2 edition of effects of flow straighteners on orifice plates in good flow conditions. found in the catalog.

effects of flow straighteners on orifice plates in good flow conditions.

D. J. M. Smith

effects of flow straighteners on orifice plates in good flow conditions.

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Published by Commission of the European Communities in Luxembourg .
Written in English


Edition Notes

SeriesBCR information
ID Numbers
Open LibraryOL14936825M
ISBN 100119713136

Fluid enters flow meter by passing through a flow straightener that dampens the turbulence in the fluid. Fluid strikes the rotor causing it to spin. The rate at which the rotor spins (rotational velocity) is directly proportional to the velocity of the fluid passing through the meter.


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effects of flow straighteners on orifice plates in good flow conditions. by D. J. M. Smith Download PDF EPUB FB2

There are huge amounts of data on installation effects on orifice plates, but very limited data on installation effects on Venturi tubes. The effect of upstream fittings and pipework is considered in terms of peakiness of profile, asymmetry and swirl.

- The effect of the location of an in-line tube bundle on orifice flowmeter performance Colorado, was used to test a mm (4 inch) stainless steel orifice meter.

The orifice meter had flange taps, and the differential pressure was measured with trans- by: 1. An explanation of the effect of the straightener itself on the orifice coefficient is presented in terms of the kinetic energy coefficient of the flow, and the effect of the swirl with no straightener in the line on the orifice plates was also by: 8.

The Effect of Disturbed Flow Conditions on the Discharge Coefficient of Orifice Plates S. SUMMARY The accurate measurement of flow rate using orifice plates depends upon many factors. One such factor is the condition of the flow in the pipe just upstream of the metering station.

minimum of 70D upstream of the orifice plate, with less than 2 degrees of swirl upstream of the 70D tube. This test should be performed with the same orifice plates and ratios that will be used for tests 2 to 5.

Good Flow Conditions with the flow conditioner downstream of the meter tube used in. flow into the pump to minimize wear and maximize service life. General flow straighteners / conditioners reduce straight-run requirements to just a few diameters.

General flow straighteners / conditioners eliminate the flow distortion effects of elbows, pipe expansion or reductions, valves, dampeners and other disrupters toFile Size: KB. C Compact Conditioning Orifice Plate, are differential pressure producers used to measure rate of fluid flow in a pipe.

Conditioning Orifice Plate Technology is based on the same Bernoulli streamline energy equation and as a result follows the same Discharge Coefficient versus Reynolds Number relationship as standard orifice Size: KB.

orifice plates are relatively simple to produce and have well-known characteristics over a wide range of flow conditions. The pressure drop across an orifice plate is typically measured using a differential pressure transducer. Within the transducer, pressure from either side of the orifice plate is applied across a Size: 1MB.

a minimum of 70D upstream of the orifice plate, with less than 2 degrees of swirl upstream of the 70D tube. This test should be performed with the same orifice plates and b ratios that will be used for tests 2 to 5. Good Flow Conditions with the flow conditioner downstream of the File Size: KB.

with Vortab flow conditioner 6 x Pipe ID 1 x Pipe ID Recommendations shown are for general reference only as actual application conditions can vary and multiple effects are possible. FCI flow meter performance guarantees are only available following completed. Flow Straighteners DESCRIPTION Cox Flow Straighteners offer a simple method of reducing or eliminating flow swirl, as a result of pipe bends and the location of valves, thermowells or pressure taps naturally found in piping systems.

The six vane straightening element, within the upstream straightener (sizes 1/2" and up), produces less pressure File Size: KB. The use of sharp-edged orifice plates to measure the mass dryness fraction in two-phase flow in pipes is discussed.

In particular the influence of the following aspects are examined: a conditions near Cited by: 1. Flowell Straightening Vanes are designed to be installed in piping upstream of an orifice plate.

When used with recommended minimum pipe lengths, they reduce flow disturbances caused by upstream piping configurations or valves. Flowell manufactures both line mounted and flanged models in carbon steel and and stainless steel.

Either using a long straight pipe, or a flow conditioner upstream of an orifice plate, usually achieves this effect of a fractal flow conditioner for both standard and non-standard flow.

Keywords: orifice plates, installation effects, EEC programme Introduction It is well known that the performance of an orifice plate flowmeter is influenced by the velocity profile in the fluid flow. A fully developed turbulent velocity profile which may be obtained downstream of a long stra [ght length of pipe is Cited by: 5.

Flow Meas. Instrum. Vol 3 No 4 Effect of plate depth on the performance of a Zanker flow straightener E. LAWS* and A. OUAZZANE* The Zanker flow straightener is one of the flow conditioning devices included in ISO It consists of a graded perforated plate followed by a section of rectangular honeycomb one pipe diameter in by: 5.

A: The orifice coefficient research is done with long, straight, run of pipe because this is the only arrangement that can be duplicated. Anything less than that is likely to have a nonstandard flow pattern, and it will affect that coefficient.

See the standards or a good flow handbook to see what is required for good accuracy. Vortab flow conditioners reduce straight-run requirements to just a few diameters.

Vortab flow conditioners eliminate the flow distortion effects of elbows, pipe expansion or reductions, valves, dampeners and other disrupters to produce a swirl-free, symmetrical and repeatable flow profile to the flow meter, pump, or other critical components.

Test 2 - Good Flow Conditions Morrow () reports performance within specification at flow conditioner - orifice plate intervals of 5D and greater under good flow conditions using natural gas (p.

7, p. 16 fig. 2c) (see below). β-ratio in this test was NOVAE FLOW TEST DATA The information contained in this document. Although it is a simple device, the orifice plate flow meter is, in principle, a precision instrument. Under ideal conditions, the inaccuracy of an orifice plate can be in the range of % AR.

Orifice plates are, however, quite sensitive to a variety of error-inducing conditions. • All volumetric flow meters can be flow conditioned: Orifice, Ultrasonic, Venturi, Coriolis Vortex, Turbine, Cone, Mag, etc. • Every meter type responds differently to the effects of swirl and flow profile distortion.

• Volumetric flow meters are looking for ‘good flow’. flow distortions. In this paper, the effects of various entrance flow velocity profiles, generated by a ball valve on the accuracy of an orifice meter are investigated. The performance of the flowmeter is also assessed when coupled with a vaned-plate flow conditioner and an NEL-plate flow conditioner.

2 Experimental Air flow rig. In the two cases where straighteners take up the same volume and surface area as the flow passage, the numerical simulations of flow in the water cannon are studied at 1 m3/h design flow : Youngjin Seo.

Flow Straighteners and Flow Conditioners. Acoustic, Noise and Vibration Silencers VG Engineering produced flow straighteners or flow conditioners provide the ability to present a swirl free, fully developed flow profile to the plane of measuring devices and machinery where space for straight runs of pipe or duct is not available or.

With orifice plates flowmeters: As the rate of flow increases, so does the differential pressure. By measuring this pressure difference it is possible to calculate the flowrate through the flowmeter.

The pass area (for example, the size of the hole in the orifice plate) remains constant. With any. Vortex flow meters like a fully developed flow profile and typically require long straight upstream piping runs. Elbows, reducers, etc upstream of the sensor will distort the flow profile and so adequate straight runs need to be accounted for.

Typical recommendations suggest 35 straight pipe diameters upstream and 5 straight pipe diameters. Investigation of laminar and turbulent flow through an orifice plate inserted in a pipe Article in Transactions- Canadian Society for Mechanical Engineering 28(2) June with 1, Reads.

orifice flow coefficient, K, is constant. However, it is known that under some conditions, a change in the orifice coefficient is possible. Figure 5 shows the results of a coefficient shift. FIGURE 5. Effect of a Shift in Orifice CoefficientFile Size: KB. Mach No is a measure of compressibility effects, for example a gas flow with V = 98 ft/s and c = ft/s has M = 98/ = 7/ Although the gas is compressible, it will have a negligible effect on the velocity profile (*M2 = % change in density) In most practical cases of gas flow Re is high and the flow is Size: KB.

produced a smaller effect on flow measurement than testing with a high beta orifice plate and lower injection rates. The authors suggest that there were many potential mechanisms which could affect flow measurement. Some of the mechanisms produce under-measurement of flow and some of the effects produce over-measurement of Size: 80KB.

During the flow conditioner tests in good flow conditions, a set of data was also taken with each flow conditioner pulled back a distance C = 50D upstream of the orifice plate. These results can be used to check the baseline [d] values for each value of beta ratio.

The less‐sophisticated NEL plate proved to be a good flow straightener, i.e. a good swirl remover, but was not an efficient flow conditioner.

The sensitivity of differential‐pressure flow meters to the quality of the approaching flow continues to be a cause for concern to flow meter manufacturers and by: K nowledge of the density of a fluid and its variation with temperature and pressure is essential for conversion between mass and volume.

This is of particular importance in the oil and gas sector where many flow measurement systems make use of volumetric flow measurement devices, but mass is the quantity required for reporting production and for allocation in shared transportation systems.

The sensitivity of orifice plate flow meters to the quality of the approaching flow continues to be a cause for concern in flow metering. The distortions caused by pipe fittings such as valves. An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe.

When a fluid (whether liquid or gaseous) passes through the orifice, its pressure builds up slightly upstream of the orifice: 85–86 but as the fluid is forced to converge to pass through the hole, the velocity increases and the fluid pressure decreases.C d {\displaystyle C_{d}}: = coefficient of.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Experimental Study of a New Flow Conditioner on Disturbed Flow in Orifice Plate Metering plate proved to be a good flow straightener, i.e. a good swirl remover, but was not an efficient flow Author: Abolfazl Ahmadi.

CROSS-REFERENCECHART Figure No. BetaRatio Flow Cond. * Table No. Test Config TapLocation** 6 X ZAN 2 FIG.3 X 7 X ZAN 3 FIG.3 X 8 X ZAN 4 FIG.3 X 9 X ZAN 5 FIG.3 X 10 X X X X ZANSUMM. FIG.3 X 11 X ETl 6 FIG.3 X 12 X ETl 7 FIG.3 X 13 X ETl 8 FIG.3 X 14 X ETl 9 FIG.3 X 15 X X X ETlSUMM.

FIG.3 X 16 X FT6 10 FIG.3 X 17 X FT6 11 FIG.3 X 18 X FT6 12. The Rosemount Conditioning Orifice Plate resolves irregular flow profiles that impact flow measurement, such as swirling effects, which are caused by upstream disturbances.

This equally spaced, 4-hole design reshapes the flow into an even profile across the entire pipe for measurement stability and accuracy. Permanent Pressure Loss (No. of dynamic Flow Conditioner heads) AGA tube bundle 1 ISO tube bundle 2 Sens & Teule bundle 10 Bosch & Hebrand bundle 10 PG&E tube bundle 1 Etoile 1 AMCA straightener 8 Vortab[TM] Sprenkle plate 15 Bellinga plate 20 Daniel Profiler[TM] plate 6 Mitsubishi plate 2 Laws plate CPA 50E plate.

Technical specification for Flow Orifice Assembly with Accessories SPECIFICATION NO.: PE-TS-XXXIA DOCUMENT NO VOLUME IIB SECTION C ISSUE NO REV.

NO. 01 DATE: Tag No.: Date Sheet Size: KB.An Orifice Meter is basically a type of flow meter used to measure the rate of flow of Liquid or Gas, especially Steam, using the Differential Pressure Measurement principle. It is mainly used for robust applications as it is known for its durability and is very economical.

As the name implies, it consists of an Orifice Plate which is the basic element of the instrument.systems, and controlling fluid flow are discussed. 4 Improving Fan System Performance Axial fans, as the name implies, move an airstream along the axis of the fan.

The air is pressurized by and conditions such as airflow rates, temperatures, pressures, airstream properties, and system layout.