气液两相流体流量的分流分相测量法  

Extracting and Separating Method for Gas-Liquid Two-Phase Flow Measurement

作　　者：王栋[1] 林宗虎[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2001年第5期441-444,共4页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金重大资助项目!(5 9995 46 0 )

摘　　要：提出了分流分相式两相流体流量测量法 ,并具体给出了 4种最基本的实现方式 ,对每种实现方式都在空气 水实验台上进行了实验研究 .实验中出现的流型包括分层流、波状分层流和环状流 .实验结果表明 ,分流分相法在工程上是可行的 ,该方法能够将两相流体的流量测量转化成单相流体的流量测量 ,可有效地克服流动不稳定性及流型变化对测量过程的影响 ,显著地提高了测量精度 ,扩大了测量范围 ,同时其体积较小便于制成自动化仪表 ,从而可得到广泛的应用 .在实验范围内 ,流量的平均测量误差小于 5% ,最好的结果可以达到 3%The main goal of this work is to provide a possible cost-effective and accurate alternative to the traditional separation techniques and other non-separating methods. With extracting and separating method (ESM), only a small faction (5%-20%) of the total flow is extracted with a distributor and separated for measurements, so the size of the separator can be reduced 5-20 times compared with the traditional separating method, and the size of a two-phase flowmeter of this type may nearly approach that of a common single phase flowmeter. The relationship between the flow rates of the stream extracted and the total flow to be measured is mainly determined by the distributor. Four basic types of distributor were proposed and tested in an air-water two-phase flow loop. The test section with 30 mm inner diameter was horizontally placed, and the flow patterns occurring during the experiments included stratified, wavy, slug and annular flow. Experimental results show that ESM is a reliable technique in the measurement of gas-liquid two-phase flow, and the average error was less than 5%, the best results ever reached was 3%.

关 键 词：两相流 流量计 分流分相法 流量测量 气液两相流 

分 类 号：TH814[机械工程—仪器科学与技术] O359.1[机械工程—精密仪器及机械]