A method of measuring two phase flow based on segmented capacitance electrodes

A kind of measurement called “step” measurement method based on segmented capacitance electrodes is proposed in this paper. The “step” measurement method is implemented through increasing and reducing the width by increasingly involving more the capacitance electrodes towards different axis directions. By this kind of measurement, the information of the flow both locally and globally can be acquired. The capacitance electrode model and the measurement method are presented in details. Based the simulations using finite element method, the relative capacitance differences are calculated. The gas-liquid cross-sectional phase distribution (annular flow, stratified flow, bubble flow) are identified. Besides, the relation between the mean relative capacitance differences and the level of the water of stratified flow is nearly linear. The “step” measurement data contains a lot of information of the flow, and further work will focus on the feature extraction method of “step” measurement data.