中文摘要：

研究了电容耦合式非接触电导检测技术（C^4D）应用于气液两相流测量的可行性，建立了一套基于非接触电导的毫米级气液两相流参数检测系统。利用所建立的系统，在内径为5mm，9mm的水平管上进行了气液两相流实验，获得了不同流型下的电导测量信号，并对段塞流、波状流、泡状流和环状流四种典型流型下的电导信号进行了分析与比较。研究结果表明，所建立的基于非接触电导的气液两相流参数检测系统是有效的，C^4D技术应用于气液两相流参数测量是可行的。不同流型下所获的电导信号特征均表现出明显差异，有望用于流型辨识。

英文摘要：

The feasibility of applying C^4D （Capacitively Coupled Contactless Conductivity Detec- tion） technique to the measurement of gas-liquid two-phase flow was investigated. A C^4D-based measurement system of gas-liquid two-phase flow was developed. Using the measurement system, on 5 mm and 9 mm pipelines, a group of gas-liquid two-phase flow experiments were carried out, and the obtained conductivity signals of different ftow patterns were analyzed and compared. The research re- suits show that： the developed measurement system is effective and is feasible to implement gas-liquid two-phase flow measurement. Research work also indicates that the differences between the conductivity signals of different flow patterns are obvious, which can be used for flow pattern identification.