中文摘要：

水平管周向液膜分布具有不对称性,是研究液体输送机理的关键。根据间接电导法测量原理,设计了用于水平环状流周向液膜特性测量的电导探针阵列,结合相关测速方法,实现了周向液膜厚度分布以及周向波动速度分布的测量。针对探针间的信号耦合问题,通过仿真分析,确定了周向探针分时与轴向探针同时相结合的工作方式。设计了基于FPGA的液膜参数测量系统,在天津大学湿气装置上进行实验,实验结果表明周向液膜厚度随着角度的增大而减小,周向波动速度随着角度的增大而基本不变。

英文摘要：

The circumferential liquid film distribution is asymmetric,and it plays an important role in studying the mechanism for transport of liquid. In this paper,a conductivity probe array for circumferential liquid film characteristic measurement in horizontal annular flow is designed based on indirect conductivity measurement principle. Combined with cross-correlation velocity measurement,it is realized that the distribution of circumferential liquid film thickness and circumferential wave velocity is measured respectively. As for the signal coupling issue between the probes,it is acknowledged that the circumferential probe must work in different time and the axial probe can work together after simulation analysis. A measurement system for liquid film parameter based on FPGA is designed. The experiment is implemented on Tianjin University moisture setup,and the result shows that the liquid film thickness decreases with the increase of angel and the wave velocity remains the same with the increase of angel.