Elbow Meter Performance

Taylor, D. C.; McPherson, M. B.

doi:10.1002/j.1551-8833.1954.tb16619.x

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…The use of a typical elbow geometry as a flow meter has been studied, and is commerciality available for use in water flow measurement. [5][6][7][8][9][10][11] However, no such flow meter exists for use in fluid power systems, in the laminar flow regime. The primary difference between the water and oil as the working fluid is the viscosity.…”

Section: Numerical Resultsmentioning

confidence: 99%

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Integrated Pressure-Flow-Temperature Sensor for Hydraulic Systems

Groepper

Cui

et al. 2005

Fluid Power Systems and Technology

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The design of a miniature low-cost MEMS (Micro-Electronic Mechanical Systems) based sensor for sensing pressure, flow and temperature in fluid power systems is presented. The sensor is small enough to be incorporated into hydraulic components such as pumps, motor and cylinders. Considerable literature exists on the development of MEMS-based pressure and temperature sensors; therefore the primary challenge addressed in this paper is a low cost flow sensing method that does not impose extra energy dissipation into the system. The flow sensing principle adopted for use with the sensor utilizes the small pressure differences that develop as fluid flows through any geometry. As an example to prove the validity of this principle, pressure-flow relationships are determined for an elbow geometry. Specifically, the pressure differences arising from the momentum change of the fluid as it passes through the elbow are correlated to the flow rate of the fluid through the bend. The pressure-flow correlations derived from theoretical modeling, computational fluid dynamic (CFD) simulation, and experimental measurement using the flow bend geometry are compared and a calibration scheme determined. The first generation MEMS sensor incorporates pressure, flow and temperature measurement capability on a single sensor die. Pressure sensing is accomplished with piezoresistive strain elements, and temperature sensing is done with a thermister.

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Section: Numerical Resultsmentioning

confidence: 99%

“…the deflection of the plate determined, the stress at any arbitrary location can be equated from the relationship shown in Eq (9)…”

mentioning

confidence: 99%

Integrated Pressure-Flow-Temperature Sensor for Hydraulic Systems

Groepper

Cui

et al. 2005

Fluid Power Systems and Technology

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“…After Jacobs and Sooy proposed the concept of elbow flowmeter in 1911, Lansford and Addison proposed the free vortex theory and forced vortex theory of elbow flowmeter [2,3]. Then, Taylor, Robertsondui and Spink summarized the previous research results and formed empirical formulas [4]. J.W.…”

Section: Research Methods and Status Of Metrological Characteristics Of Elbow Flowmetermentioning

confidence: 99%

Analysis of metrological characteristics of elbow flowmeter under rotating state

Wang

Luo

et al. 2021

Int. J. Metrol. Qual. Eng.

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The application of elbow flowmeter in rotary equipments is beneficial to reduce the pipeline complexity. However, the intervention of centrifugal acceleration will lead to the change of metrological characteristics of elbow flowmeter. Based on the analysis of the differential pressure formation mechanism of the environmental acceleration on the elbow flowmeter, the calculation formula of the flow rate measurement with the elbow flowmeter in the rotating state is derived, and the fitting method of the discharge coefficient is put forward. The CFD method was used to analyze the internal flow field of the elbow flowmeter under rotating state, summarize the pressure distribution characteristics of the pipe wall, and verify the feasibility of the discharge coefficient fitting strategy by simulation. The results show that for the elbow flowmeters with diameters of 10 mm and 15 mm and the radius to diameter ratio of 1.5, as long as the water flow rate is between 1.5 m/s and 5 m/s, the measurement accuracy can be guaranteed to be above 4%.

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“…Then the hot helium releases its thermal power to the water in the secondary loop and is cooled down to around 250 ∘ C. The cooled helium from 14 riser pipes collects into the header box and is pumped back to the reactor by the blower. Each of the riser pipes is connected to the header box by a 90 ∘ elbow, as shown in Figure 1(b), which is used as the sensor to measure the helium flow rate by monitoring the pressure difference between its intrados and extrados [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Instantaneous Turbulent Flow Field in a 90-Degree Elbow Pipe with Circular Section

Wang

Ren

Sun

et al. 2016

Science and Technology of Nuclear Installations

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Based on the special application of 90-degree elbow pipe in the HTR-PM, the large eddy simulation was selected to calculate the instantaneous flow field in the 90-degree elbow pipe combining with the experimental results. The characteristics of the instantaneous turbulent flow field under the influence of flow separation and secondary flow were studied by analyzing the instantaneous pressure information at specific monitoring points and the instantaneous velocity field on the cross section of the elbow. The pattern and the intensity of the Dean vortex and the small scale eddies change over time and induce the asymmetry of the flow field. The turbulent disturbance upstream and the flow separation near the intrados couple with the vortexes of various scales. Energy is transferred from large scale eddies to small scale eddies and dissipated by the viscous stress in the end.

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Elbow Meter Performance

Cited by 7 publications

References 1 publication

Integrated Pressure-Flow-Temperature Sensor for Hydraulic Systems

Integrated Pressure-Flow-Temperature Sensor for Hydraulic Systems

Analysis of metrological characteristics of elbow flowmeter under rotating state

A Study on the Instantaneous Turbulent Flow Field in a 90-Degree Elbow Pipe with Circular Section

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