An Improved Conductance Sensor With Inner-Outer Multi-Height Ring Electrodes for Measurement of Vertical Gas-Liquid Flow

Measurement of Oil-Water Flows by Conductance Cross?Correlation Flowmeter with Center Body in a Small Pipe

“…Fig. 7(a) shows the calculation results of U cc , similar to gasliquid flow [23], for the same U m , the transit time increases with the decrease of water cut, leading to a decrease of U cc . For the same water cut, the transit time decreases with the increase of U m , resulting in the According to the research of Kytömaa and Brennen [25], the cross-correlation velocity U cc is equal to the velocity of kinematic wave U kw .…”

“…In order to make the measurement accuracy of U cc higher, appropriate sample frequency should be adopted [23,24]. In this experiment, the maximum U m at the inlet of the pipe is 0.33 m/s, and the velocity through the annular space of the center body is not more than 0.44 m/s.…”

“…In order to evaluate the accuracy of the conductance sensor to the measurement of oil-water flows, two statistical indexes [23]: The absolute average percentage deviation (AAPD) and the absolute average deviation (AAD), are introduced in this paper. Fig.…”

“…1. We have explained the specific optimization design process of the sensor in literature [23]. The design of unequal height electrodes ensures the uniform distribution of electric field in annular space, which is beneficial to overcome the influence of uneven distribution of the dispersed phase on water holdup measurement.…”

“…Based on this, we report an experimental study on flow measurement of vertical upward oil-water flows using conductance sensor with inner-outer multi-height ring electrodes, which is designed and used in the study of gas-liquid flow [23] by our group. In the dynamic experiment, four flow patterns are identified by combining images of high-speed camera and the output signals.…”