Integration of impedance measurements with acoustic measurements for accurate two phase flow metering in case of high water-cut

AbstractIn the present study, multi-scale entropy algorithm was used to characterise the complex flow phenomena of turbulent droplets in high water-cut oil-water two-phase flow. First, we compared multi-scale weighted permutation entropy (MWPE), multi-scale approximate entropy (MAE), multi-scale sample entropy (MSE) and multi-scale complexity measure (MCM) for typical nonlinear systems. The results show that MWPE presents satisfied variability with scale and anti-noise ability. Accordingly, we conducted an experiment of vertical upward oil-water two-phase flow with high water-cut and collected the signals of a high-resolution microwave resonant sensor, based on which two indexes, the entropy rate and mean value of MWPE, were extracted. Besides, the effects of total flow rate and water-cut on these two indexes were analysed. Our researches show that MWPE is an effective method to uncover the dynamic instability of oil-water two-phase flow with high water-cut.

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Signal processing methods for Coriolis Mass Flow Metering in two-phase flow conditions

2016 IEEE International Conference on Industrial Technology (ICIT) ◽

10.1109/icit.2016.7474833 ◽

2016 ◽

Cited By ~ 5

Author(s):

Ming Li ◽

Manus Henry

Keyword(s):

Signal Processing ◽

Mass Flow ◽

Two Phase Flow ◽

Phase Flow ◽

Flow Conditions ◽

Two Phase ◽

Processing Methods ◽

Flow Metering ◽

Signal Processing Methods

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Compressibility Effect in Two-Phase Flow and Its Application to Flow Metering With Orifice Plate and Convergent-Divergent Nozzle

Journal of Fluids Engineering ◽

10.1115/1.3241017 ◽

1983 ◽

Vol 105 (4) ◽

pp. 394-399 ◽

Cited By ~ 6

Author(s):

H. Pascal

Keyword(s):

Two Phase Flow ◽

Flow Behavior ◽

Orifice Plate ◽

Phase Flow ◽

Gas Solubility ◽

Mass Ratio ◽

Two Phase ◽

Compressibility Effect ◽

Flow Metering ◽

Solution Gas

The effect of solution gas on the two-phase flow behavior through an orifice plate and a convergent-divergent nozzle has been investigated with regard to the flow metering of compressible two-phase mixtures. A proper thermodynamics approach to consider more accurately the compressibility effect in an accelerated two-phase flow, in particular that through an orifice and Laval’s nozzle in the presence of the solution gas, has been developed. From this approach an equation of state of mixture was derived and used in determining the orifice equation. An analysis of flow behavior has been performed and several illustrative plots were presented in order to evaluate the gas solubility effect in the flow metering with an orifice plate or a convergent-divergent nozzle. A delimitation between critical and noncritical flow has been established in terms of measured parameters and a relationship between the critical pressure and gas-liquid mass ratio was also shown.

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Wet Gas Flow Metering Based on Differential Pressure and BSS Techniques

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.4922 ◽

2011 ◽

Vol 383-390 ◽

pp. 4922-4927

Author(s):

Peng Xia Xu ◽

Yan Feng Geng

Keyword(s):

Flow Rate ◽

Liquid Flow ◽

Gas Flow ◽

Two Phase Flow ◽

Liquid Flow Rate ◽

Differential Pressure ◽

Phase Flow ◽

Two Phase ◽

Flow Metering ◽

Wet Gas

Wet gas flow is a typical two-phase flow with low liquid fractions. As differential pressure signal contains rich information of flow parameters in two-phase flow metering, a new method is proposed for wet gas flow metering based on differential pressure (DP) and blind source separation (BSS) techniques. DP signals are from a couple of slotted orifices and the BSS method is based on time-frequency analysis. A good relationship between the liquid flow rate and the characteristic quantity of the separated signal is established, and a differential pressure correlation for slotted orifice is applied to calculate the gas flow rate. The calculation results are good with 90% relative errors less than ±10%. The results also show that BSS is an effective method to extract liquid flow rate from DP signals of wet gas flow, and to analysis different interactions among the total DP readings.

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Flow Regime Detection of Boiling Flow in Microchannels Using Electrical Sensing Elements Validated by Videography

ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels ◽

10.1115/icnmm2018-7729 ◽

2018 ◽

Cited By ~ 2

Author(s):

Mohammadmahdi Talebi ◽

Keith Cobry ◽

Sahba Sadir ◽

Roland Dittmeyer ◽

Peter Woias

Keyword(s):

Indium Tin Oxide ◽

Electrical Impedance ◽

Two Phase Flow ◽

Bubbly Flow ◽

Protective Layer ◽

Phase Flow ◽

Two Phase ◽

Impedance Measurements ◽

Electrical Sensing ◽

Boiling Flow

In this work we present a method that provides the possibility to analyze directly the electrical properties of two-phase flow in microchannel boiling systems. It is shown that the use of impedimetric sensing techniques can be used to track two-phase boiling flow. In order to perform such measurements, the electrical impedance of the composite medium in the channel is measured using planar capacitive elements that are implemented over the channel on a glass lid. Working electrodes are fabricated using indium tin oxide on glass and are compressed against a precision machined metal microchannel. Therefore, it is possible to visually analyze two-phase flow inside the microchannel while simultaneously performing electrical impedance measurements. In order to prevent electrochemical reactions between the fluid inside the microchannel and electrodes on the glass lid, a thin layer of SU8 photoresist was deposited as a protective layer. The electrical impedance measurements were characterized over two-phase flow regimes including bubbly flow, slug flow and annular flow via comparison with simultaneous video recordings.

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