Paper Info
Title
Capacitive Phase Shift Detection for Measuring Water Holdup in Horizontal Oil-Water Two-Phase Flow.
Abstract
In this paper, a phase shift detection system of flow impedance is designed based on a concave capacitance sensor (CCS). The flow impedance of oil water stratified flow is investigated by establishing an equivalent circuit model and a finite element model. The influence of exciting frequency and sensor geometric parameters on the phase shift output of the CCS is studied to access an optimal phase shift measurement system. An experiment of horizontal oil water two-phase flows was conducted during which four flow patterns are observed, i.e., stratified flow (ST), stratified wavy flow (SW), dual continuous flow (DC), and dispersed oil-in-water and water flow (DO/W&W). The phase shift responses of the CCS to the water holdup variation are collected. The results indicate that the phase shift response of the CCS presents satisfied sensitivity for ST and SW flow patterns, which is consistent with the predictions of the equivalent circuit model and the finite element model. Although the flow structures of DC and DO/W&W flows are extremely nonuniform, the phase shift response of the CCS still shows better linearity and sensitivity to the water holdup variation. In general, the capacitive phase shift detection technology exhibits advantages for water holdup measurement in horizontal oil water two-phase flow with nonuniform phase distributions and conductive water.
Year
DOI
Venue
2018
10.3390/s18072234
SENSORS
Keywords
Field
DocType
oil water two-phase flow,capacitance sensor,phase shift detection,water holdup
Analytical chemistry,Capacitive sensing,Mechanics,Engineering,Two-phase flow,Phase (waves)
Journal
Volume
Issue
Citations 
18
7.0
0
PageRank 
References 
Authors
0.34
1
5
Name
Order
Citations
PageRank
Hongxin Zhang101.01
Lusheng Zhai263.85
Cong Yan300.34
Hongmei Wang43113.44
Jin Ningde5139.31