中文摘要：

本文提出了一种基于电容耦合式非接触电导测量（Capacitively Coupled Contactless Conductivity Detection，C^4D）技术的小通道气液两相流流速测量新方法。该方法首先利用新型C^4传感器获得两组气液两相流流体电导信号，然后对这两组信号进行互相关运算获得气液两相流流体的速度值。作为初步研究，本文针对小通道气液两相流中常见的典型泡状流及弹状流进行了流速测量实验。三种不同内径水平小通道内的实验结果表明C^4技术用于气液两相流流速测量是可行的。速度测量的最大相对误差小于10％，所提出的基于C^4技术的小通道气液两相流流速测量新方法是有效的。

英文摘要：

Based on Capacitively Coupled Contactless Conductivity Detection （C4D） technique, a new method for the velocity measurement of mini-channel gas-liquid two-phase flow is proposed. First, two conductivity signals of gas-liquid two-phase flow are obtained by the new C4D sensor, then by cross-correlating the two signals, the velocity of gas-liquid two-phase flow is obtained. As a preliminary research, two typical flow patterns of mini-channel gas-liquid two-phase flow, bubble flow and slug flow, are studied in velocity measurement experiments. Experimental results, which are carried out in three horizontal mini-channels with different inner-diameters, show that C4D technique is feasible for the velocity measurement of gas-liquid two-phase flow. The maximum velocity measurement relative error is less than 10% and the proposed method for velocity measurement of gas-liquid two-phase flow is effective.