Measurement system for characterization of gas-liquid two-phase flow in micro-channel

A measurement system is developed for the parameter detection and flow characterization of gas-liquid two-phase flow in micro-channel. Electrical capacitance measurement system and optical measurement system are designed for the micro-channels with different inner diameters of 4.0 mm, 3.1 mm and 1.8 mm respectively. In experiment, bubble flow, stratified flow, slug flow and annular flow are observed. PSD (Power Spectrum Density) and PDF (Probability Density Function) methods are used to analyze the capacitance and optical signals. The results show that the stratified flow can not be observed in the pipe with inner diameter of 1.8 mm, and that the PSD and PDF curve can be used to characterize different flow regimes of gas-liquid two-phase flow in micro-channel. So the constructed measurement system is effective, and can be used to analyze flow characteristics and identify flow regime of gas-liquid two-phase flow in micro-channel.