Selection of the Relevant Turbulence Model in a CFD Simulation of a Flow Disturbed by Hydraulic Elbow — Comparative Analysis of the Simulation with Measurements Results Obtained by the Ultrasonic Flowmeter

Piechota, Piotr; Synowiec, P.; Andruszkiewicz, A.; Wędrychowicz, W.

doi:10.1007/s11630-018-1034-z

Cited by 12 publications

(7 citation statements)

References 2 publications

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“…Consequently, it is recommended to conduct research that allows for the investigation of the influence of obstructions (knees, gate valves, constrictions, and throttles) on ultrasonic flow-meter readings. Previous studies [15][16][17] have addressed the issue of ultrasonic flow measurement under non-standard measurement settings downstream of a pipeline elbow. This study focused on the data acquired downstream of a butterfly valve with a manual closing angle.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Technique for Measuring the Mean Flow Velocity Behind a Throttle: A Metrological Analysis

Beithou¹,

Wędrychowicz²,

Wróblewska³

et al. 2022

SSRN Journal

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Technique for Measuring the Mean Flow Velocity Behind a Throttle: A Metrological Analysis

Beithou¹,

Wędrychowicz²,

Wróblewska³

et al. 2022

SSRN Journal

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“…In this case, the measuring accuracy of the devices should be as high as possible, assuming the lowest possible investment costs. That is why in each case of measurement, the most important factor is the selection of the best available measurement technique in relation to costs [ 7 , 8 , 9 ]. Performing flow measurements is characterized by a multitude of solutions, such as Pitot tubes, measuring orifices, turbine flow meters, bend flow meters, vortex flow meters, Coriolis flow meters, electromagnetic flow meters and ultrasonic flow meters [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Flow Disturbances behind the 90° Bend on the Indications of the Ultrasonic Flow Meter with Clamp-On Sensors on Pipelines

Synowiec

Andruszkiewicz

Wędrychowicz

et al. 2021

Sensors

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The subject matter of the article concerns velocities/flow rate measurements in the area of disturbed flows-behind the 90° bend. They were conducted by means of an ultrasonic flowmeter with clamp-on sensors on pipeline, for water and two different Reynolds numbers of 70,000 and 100,000, corresponding to two velocities of approximately 1.42 m/s and 2.04 m/s. The tests were carried out at 12 distances from the disturbance. Sensors on the circumference of the pipeline were mounted 30° each. The correction factor values were calculated for the given measurement geometry. The measurements have shown that the values of this coefficient are always greater than 1, which means that the ultrasonic flow meter understates the speed values. They also showed that already at a distance of 8 nominal diameters from the disturbance, the correction factor does not exceed 1.02, so the measurement errors are within the maximum permissible error (MPE) of a typical ultrasonic flow meter. For distances less than eight nominal diameters from the disturbance, not taking the correction factor value into the account can lead to systematic errors of up to 10.8%. Studies have also proved that in each measurement plane behind the disturbance there are two mounting angles for the ultrasonic sensors, 60° and 240° respectively, for which the correction factor values are minimal. Additionally, using the laser Doppler anemometry (LDA) method, velocity solids were determined at individual distances from the disturbance, and the projections of velocity blocks on the appropriate plane represented velocity profiles and indicated the distances from the disturbance at which these profiles stabilise.

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“…Achieving device accuracy below 1% of the measured value is only possible for multi-way flow meters [4]. An important condition for maintaining the declared accuracy of measurement is the installation of the flow meter heads while maintaining the straight pipe sections required in the standards [5].…”

Section: Introductionmentioning

confidence: 99%

Measuring the Fluid Flow Velocity and Its Uncertainty Using Monte Carlo Method and Ultrasonic Technique

Awad

Abulghanam

Fayyad

et al. 2020

Wseas Transactions on Fluid Mechanics

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One of the most important challenges in fluid mechanics, gas dynamics, and hydraulic machinery fields is measuring the flow velocity with high accuracy. It is more important in large systems; such as thermal power stations, large scale power generations, and combined cycle power plants. The exact estimation of the measurement uncertainty inflow velocity is extremely important in evaluating the accuracy of the measurement. This work describes the problem of estimating measurement uncertainty when there are two or more dominant components of the uncertainty budget. . Two methods, analytical and numerical methods are used to study the comparative analysis for the results of determining the expanded uncertainty of measurement using two methods: analytical method and the numerical method. The analytical method uses the law of uncertainty propagation and is based on the estimation of uncertainty values of type A and B, while the numerical technique depends on the evaluation of measured samples by the Monte Carlo method using a random number generator. The aim of this article is to show the Monte Carlo method as an alternative way to determine the distribution of individual components of the measurement uncertainty budget. Also, the measurement of liquid flow velocity by an ultrasonic method has been analyzed, which is commonly used due to high measurement accuracy and non-invasiveness. Due to the complexity of the equation defining the measured flow velocity, determining the measurement uncertainty is not an easy task.

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Selection of the Relevant Turbulence Model in a CFD Simulation of a Flow Disturbed by Hydraulic Elbow — Comparative Analysis of the Simulation with Measurements Results Obtained by the Ultrasonic Flowmeter

Cited by 12 publications

References 2 publications

Ultrasonic Technique for Measuring the Mean Flow Velocity Behind a Throttle: A Metrological Analysis

Ultrasonic Technique for Measuring the Mean Flow Velocity Behind a Throttle: A Metrological Analysis

Influence of Flow Disturbances behind the 90° Bend on the Indications of the Ultrasonic Flow Meter with Clamp-On Sensors on Pipelines

Measuring the Fluid Flow Velocity and Its Uncertainty Using Monte Carlo Method and Ultrasonic Technique

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