Considerations in the Practical Application of the Multisensor Conductivity Probe for Two-Phase Flow

The parameters of gas-liquid two-phase flow bubbles in field coalbed methane (CBM) wells are of great significance for analyzing coalbed methane output, judging faults in CBM wells, and developing gas drainage and extraction processes, which stimulates an urgent need for detecting bubble parameters for CBM wells in the field. However, existing bubble detectors cannot meet the requirements of the working environments of CBM wells. Therefore, this paper reports findings on the principles of measuring the flow pattern, velocity, and volume of two-phase flow bubbles based on conductivity, from which a new bubble sensor was designed. The structural parameters and other parameters of the sensor were then computed, the “water film phenomenon” produced by the sensor was analyzed, and the appropriate materials for making the sensor were tested and selected. After the sensor was successfully devised, laboratory tests and field tests were performed, and the test results indicated that the sensor was highly reliable and could detect the flow patterns of two-phase flows, as well as the quantities, velocities, and volumes of bubbles. With a velocity measurement error of ±5% and a volume measurement error of ±7%, the sensor can meet the requirements of field use. Finally, the characteristics and deficiencies of the bubble sensor are summarized based on an analysis of the measurement errors and a comparison of existing bubble-measuring devices and the designed sensor.

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“…From a literature review and numerous trials [ 19 , 20 , 21 , 22 , 23 ], it was determined that H = 0.3 mm, L = 3 mm, and D = 1.5 mm.…”

Section: Design Of Bubble Sensormentioning

confidence: 99%

Research on the Conductivity-Based Detection Principles of Bubbles in Two-Phase Flows and the Design of a Bubble Sensor for CBM Wells

Wen

Han

et al. 2016

Sensors

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Experimental study on interfacial structure and interfacial area transport in downward two-phase flow

Wang

Dang

et al. 2017

International Journal of Heat and Mass Transfer

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Experimental study of interfacial characteristics of vertical upward air-water two-phase flow in 25.4 mm ID round pipe

Dang

Wang

et al. 2017

International Journal of Heat and Mass Transfer

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Considerations in the Practical Application of the Multisensor Conductivity Probe for Two-Phase Flow

Cited by 3 publications

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Research on the Conductivity-Based Detection Principles of Bubbles in Two-Phase Flows and the Design of a Bubble Sensor for CBM Wells

Research on the Conductivity-Based Detection Principles of Bubbles in Two-Phase Flows and the Design of a Bubble Sensor for CBM Wells

Experimental study on interfacial structure and interfacial area transport in downward two-phase flow

Experimental study of interfacial characteristics of vertical upward air-water two-phase flow in 25.4 mm ID round pipe

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