Measuring two phase flow parameters using impedance cross-correlation flow meter

The vertical co-current downward air-water two-phase flow was studied under adiabatic condition in round tube test sections of 25.4-mm and 50.8-mm ID. In flow regime identification, a new approach was employed to minimize the subjective judgment. It was found that the flow regimes in the co-current downward flow strongly depend on the channel size. In addition, various local two-phase flow parameters were acquired by the multi-sensor miniaturized conductivity probe in bubbly flow. Furthermore, the area-averaged data acquired by the impedance void meter were analyzed using the drift flux model. Three different distributions parameters were developed for different ranges of non-dimensional superficial velocity, defined by the ration of total superficial velocity to the drift velocity.

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Horizontal Air-Water Two-Phase Flow Measurement Using an Electrical Impedance Probe and a Venturi Flow Meter

Journal of Physics Conference Series ◽

10.1088/1742-6596/1224/1/012040 ◽

2019 ◽

Vol 1224 ◽

pp. 012040

Author(s):

G Chiesa ◽

C Bertani ◽

N Falcone ◽

A Bersano ◽

M DE Salve ◽

...

Keyword(s):

Flow Measurement ◽

Electrical Impedance ◽

Two Phase Flow ◽

Phase Flow ◽

Flow Meter ◽

Two Phase ◽

Impedance Probe ◽

Venturi Flow Meter

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Flow velocity measurement based on ultrasonic cross-correlation technique in oil-water two-phase flow

2016 35th Chinese Control Conference (CCC) ◽

10.1109/chicc.2016.7554118 ◽

2016 ◽

Cited By ~ 2

Author(s):

Xuewei Shi ◽

Xiaoxiao Dong ◽

Chao Tan ◽

Feng Dong

Keyword(s):

Flow Velocity ◽

Velocity Measurement ◽

Cross Correlation ◽

Two Phase Flow ◽

Correlation Technique ◽

Phase Flow ◽

Two Phase ◽

Flow Velocity Measurement ◽

Oil Water ◽

Cross Correlation Technique

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Time Delay Estimation in Two-Phase Flow Investigation Using theγ-Ray Attenuation Technique

Mathematical Problems in Engineering ◽

10.1155/2014/475735 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 21

Author(s):

Robert Hanus ◽

Marcin Zych ◽

Leszek Petryka ◽

Dariusz Świsulski

Keyword(s):

Time Delay ◽

Cross Correlation ◽

Two Phase Flow ◽

Time Delay Estimation ◽

Delay Estimation ◽

Phase Flow ◽

Two Phase ◽

Stochastic Signals ◽

Difference Function ◽

Combined Methods

Time delay estimation is an important research question having many applications in a range of technologies. Measurement of a two-phase flow in a pipeline or an open channel using radioisotopes is an example of such application. For instance, the determination of velocity of dispersed phase in that case is based on estimation of the time delay between two stochastic signals provided by scintillation probes. The proper analysis of such signals, usually in presence of noise, requires the use of advanced statistical signal processing. In this paper, the simulation studies of time delay estimation were carried out with the use of the following differential methods: average magnitude difference function, and average square difference function and proposed combined methods comprising the above-mentioned differential and cross-correlation functions are presented. Attached simulations have been carried out for models of stochastic signals corresponding to the signals obtained in gamma-ray absorption measurements of gas-liquid flow in a horizontal pipeline. The standard uncertainties of time delay estimations have been determined for each of the methods. Improved metrological properties have been stated in the combined methods in comparison with the classical cross-correlation procedure.

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