International Society for Industrial Process Tomography

Void Fraction Measurement of Gas-liquid Two-phase Flow by a Capacitively Coupled Electrical Resistance Tomography Sensor under Different Excitation Patterns

Zhen Xu, Yandan Jiang, Baoliang Wang*, Zhiyao Huang, Haifeng Ji and Haiqing Li

State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering

Zhejiang University, Hangzhou 310027, China

Email: Xuzhen2016@zju.edu.cn, *wangbl@zju.edu.cn, zy_huang@zju.edu.cn

ABSTRACT

The void fraction measurement of gas-liquid two-phase flow by a Capacitively Coupled Electrical Resistance Tomography (CCERT) sensor under two excitation patterns (1-electrode excitation pattern and 2-electrode excitation pattern) is studied in this work. Two typical flow patterns (the bubble flow and the stratified flow) are investigated in this work. The void fraction measurement models of these two flow patterns are established by least squares method. Static experiments are carried out to test the performance of the void fraction measurement models under the two excitation patterns. The results show that the void fraction measurement performance of bubble flow is satisfactory under the two excitation patterns. While the void fraction measurement performance of stratified flow is not good enough and should be improved. To implement effective void fraction measurement, more research work should be undertaken in the future.

Keywords void fraction, gas-liquid two-phase flow, capacitively coupled electrical resistance tomography, excitation pattern

Industrial Application gas and liquid