NDLI: Sectional water fraction measurement for gas-water two-phase flow containing a conductive water phase utilizing capacitance sensor

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Sectional water fraction measurement for gas-water two-phase flow containing a conductive water phase utilizing capacitance sensor

Content Provider	Scilit
Author	Tang, Kaihao Hu, Hongli Li, Lin Wang, Xiaoxin
Copyright Year	2021
Description	Journal: Measurement Science and Technology By applying an electrical capacitance sensor to sectional water fraction measurement for gas–water (salinity) two-phase flow, this paper investigates the effect of a medium’s conductivity on the measurement of capacitance sensors and its elimination. Firstly, the mechanism of how a medium’s conductivity influences the capacitance measurement of a capacitance sensor is analyzed by combining a physical model of the sensor with its conditioning circuit. The theoretical analysis indicates that the applied exciting frequency is a key factor influencing the conductivity effect; the effect can be restrained by increasing the excitation frequency. Then, an exciting frequency optimization rule is proposed accordingly. In addition, sensor configuration and geometry optimization (based on finite element method simulations) are discussed to achieve better performance. Dynamic and static calibration experiments are carried out for stratified gas–liquid (salinity) two-phase flow for the purpose of validating the proposed method. The experimental results confirm the effectiveness of the proposed method. This work is constructive to the design of capacitive sensing technologies applied to conductive objects, and offers insights into the structural design and optimization of capacitance sensors.
Related Links	https://iopscience.iop.org/article/10.1088/1361-6501/abea3e/pdf
ISSN	09570233
e-ISSN	13616501
DOI	10.1088/1361-6501/abea3e
Journal	Measurement Science and Technology
Issue Number	5
Volume Number	32
Language	English
Publisher	IOP Publishing
Publisher Date	2021-02-26
Access Restriction	Open
Subject Keyword	Journal: Measurement Science and Technology Industrial Relations Capacitance Sensor
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Instrumentation Engineering

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