电阻层析成像技术在两相流测量中的应用

过程层析成像技术能实时提供封闭管道、容器等过程设备内物场运动状态的二／三维测量信息,它为解决两相流参数的检测问题提供一种新的途径。本文以基于电学敏感原理的电阻层析成像技术为测量手段,实现在多相流实验装置上对气／水、油／水两相流二维／三维时空分布信息的实际测量;介绍了基于测量数据特性分析的在线流型识别技术和相含率的估计方法,应用现代数据处理和模式识别技术进行数据融合与提取,实现两相管流流型识别和分相含率的估计;通过开展相关测量的研究,初步实现两相流中离散相流量的测量。

APPLICATION OF ELECRICAL RESISTANCE TOMOGRAPHY IN TWO-PHASE FLOW MEASUREMENT

Process tomography technique can provide two/three dimension information related to the interior behavior of medium within the process equipments, such as close pipes, vessels and so on, in real time. Therefore it is a novel approach for two-phase flow parameter measurement. In the paper, the measurement tool was the Electrical Resistance Tomography (ERT) system based on the electrical sensitive principle and used in the multi-phase flow loop to measure the two-dimensional /three-dimensional spatiotemporal distribution information of the air-water and oil-water two-phase flow. The methods of on-line flow regime identification and void fraction estimation based on the measured data characteristic analysis were introduced. With the modern information process and the pattern recognition technique realized the data fusion and feature extraction. The flow regimes identification and void fraction estimation of two phase flow were carried out. Through research on correlation measurement, flow measurement of discrete phase in two phase flows are realized primarily.