On the measurement of the mass flow rate of horizontal two-phase flows in the proximity of the transition lines which separates two different flow patterns

Reis, Emerson dos; Goldstein, Leonardo

doi:10.1016/j.flowmeasinst.2008.01.002

Cited by 15 publications

(4 citation statements)

References 12 publications

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“…Experimental results show that the measurement error of our method is around 5% at the lower part of the main pipe and the branch pipe, and around 15% at the upper part of the main pipe. In comparison with the existing models, this method has a high measurement accuracy [36][37][38]. Compared with other measurement approaches, our method presents a smaller relative difference.…”

Section: The Accuracy Of the Proposed Methodsmentioning

confidence: 91%

“…For instance, the method based on the combination instrument of turbine flowmeter and conductance sensor with petal type concentrating flow diverter, has an average error of 7.9% and has been employed to measure the gasliquid two phase flow in gas wells of Daqing oil field in China [16]. Additionally, some researches [17,38] shows that the method which employed the electrical capacitance tomography technique and a Venturi tube presents an underestimation of about 10% to 20% in the annular flow. The accuracy of the methods above is worse than our method.…”

Section: The Accuracy Of the Proposed Methodsmentioning

confidence: 99%

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Measurement of Liquid Flow Rate among the Annular Flow in Vertical Tee Junction Using Digital Subtraction Method

Huang

Sun

et al. 2021

Sens Imaging

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Since the liquid flow rate of the annular flow is closely related to the heat exchange efficiency, it has great significance to measure the liquid flow rate of the annular flow in vertical tee junction. In order to acquire the liquid flow rate of the annular flow in vertical tee junction, a measurement method has been designed, which implements the digital subtraction method to measure the thickness of the liquid film under the visible light and to apply the image feature matching algorithm to obtain the liquid velocity field. Moreover, the accuracy of the liquid film velocity field as well as the spatial and temporal stability of the mass flow rate is tested by proposed algorithms in this study. Experimental results show that the measurement error of our method is approximately 5% in the lower section of the main pipe and the branch pipe, and lower than 15% in the upper section of the main pipe. Therefore, this method has a high accuracy in comparison with other measurement approaches. Our method can be applied to measure and analyse the shape and property of the annular flow in the vertical tee junction.

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Section: The Accuracy Of the Proposed Methodsmentioning

confidence: 91%

Section: The Accuracy Of the Proposed Methodsmentioning

confidence: 99%

Measurement of Liquid Flow Rate among the Annular Flow in Vertical Tee Junction Using Digital Subtraction Method

Huang

Sun

et al. 2021

Sens Imaging

View full text Add to dashboard Cite

show abstract

“…Therefore, a single phase flowmeter is not capable of measuring the flowrate and phase fraction simultaneously and a combination with other measuring devices is necessary. A lot of combined methods have been developed to measure the two-phase flowrate and phase fraction (Huang et al ,2005;Geng et al ,2007;Meng et al ,2010;Meribout et al ,2010;Oliveira et al ,2009;Reis and Jr ,2008;Sun ,2010;Zhang et al ,2010;Zheng et al ,2008).…”

Section: Recent Development In Two-phase Flow Measurementmentioning

confidence: 99%

Gas-Liquid Two-Phase Flow Rate Measurements by Flow Division and Separation Method

Wang¹

2012

Flow Measurement

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“…In this flow, void fraction is one of the key parameters to characterize the nature of gas-liquid practice, and the resistance method, ray method, and optical method are the main measurement techniques employed. The resistance method is particularly attractive due to its low cost, ease of implementation, safety, fast speed, and adaptability to complex industrial environments, making it a popular choice for researchers and practitioners alike [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Void fraction measurement of gas–liquid two-phase flow based on compressed sensing theory and capacitively coupled electrical resistance tomography system

Gao,

Ku,

Jian

2023

Meas. Sci. Technol.

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Capacitively coupled electrical resistance tomography (CCERT) is an innovative technique for electrical resistance tomography (ERT) based on capacitively coupled contactless conductivity detection (C4D). Despite its potential, there are only a few studies on image reconstruction algorithms for CCERT. To address this, a CCERT measurement system was developed, and the compressed sensing (CS) theory was applied to the inverse problem imaging of CCERT to improve the image reconstruction quality and speed. Firstly, we constructed a mathematical CCERT image reconstruction model under CS theory and employed three algorithms under CS theory to solve the convex optimization problem of the reconstruction model, resulting in the original reconstructed image. Then we applied thresholding operation to obtain the post-processed image and compared it with the classical LBP and Landweber algorithms, using the image correlation coefficient and relative error as evaluation standards for the reconstructed images. The simulation results demonstrated that the GPSR-BB algorithm yielded more satisfactory imaging results than the other four algorithms. Additionally, we compared three sensitivity matrix optimization methods and found that the new method of screening the rows of the sensitivity matrix to zero was more effective than the other two common optimization methods in terms of reconstructed image quality. Finally, we conducted static experiments of void fraction measurement using the developed CCERT system. The results indicated that the absolute error of void fraction measurement by GPSR-BB algorithm was less than 6.59% in the range of void fraction from 0.90% to 66.29%.

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On the measurement of the mass flow rate of horizontal two-phase flows in the proximity of the transition lines which separates two different flow patterns

Cited by 15 publications

References 12 publications

Measurement of Liquid Flow Rate among the Annular Flow in Vertical Tee Junction Using Digital Subtraction Method

Measurement of Liquid Flow Rate among the Annular Flow in Vertical Tee Junction Using Digital Subtraction Method

Gas-Liquid Two-Phase Flow Rate Measurements by Flow Division and Separation Method

Void fraction measurement of gas–liquid two-phase flow based on compressed sensing theory and capacitively coupled electrical resistance tomography system

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