中文摘要：

本文探讨了将电容耦合式非接触电导测量（Capacitively Coupled Contactless Conductivity Detection,C~4D）技术应用于毫米级管径气液两相流气泡速度测量的可行性,提出了一种结合C~4D技术及互相关测速原理的气泡速度测量新方法。研究包括两个部分：首先,结合串联谐振原理,研制了一种适用于气泡速度测量的新型三电极C~4D传感器;其次,利用所研制传感器获得的两组电导信号,根据互相关测速原理实现气泡的速度测量。作为初步研究,在内径6.0mm的竖直管内进行了气泡速度测量实验。实验结果表明将C~4D技术运用于毫米级管径气液两相流气泡速度测量是可行的,所提出的气泡速度测量方法是有效的。

英文摘要：

The feasibility of applying Capacitively Coupled Contactless Conductivity Detection （C4D） technique to measurement of bubble velocity in gas-liquid two-phase flow in millimeter-scale pipe is in- vestigated, and a new method for measurement of bubble velocity, which combines the C4D technique and the principle of cross-correlation velocity measurement, is proposed. This research includes two parts： first, combining with the series resonance principle, a new three-electrode C4D sensor, which is suitable for the measurement of bubble velocity, is developed. Second, with the two conductivity signals obtained by the developed sensor, measurement of bubble velocity is implemented according to the principle of cross-correlation velocity measurement. As a preliminary research, velocity measure- ment experiments are carried out in a vertical pipe with 6.0 mm inner diameter. Experimental results show that applying CaD technique to measurement of bubble velocity in gas-liquid two-phase flow in millimeter-scale pipe is feasible, the proposed method for measurement of bubble velocity is effective.