转鼓分流分相式气液两相流体流量测量技术研究  

Extracting and Separating Method Type Gas-Liquid Two-Phase Flow Meter by Using Rotational Drum as Distributor

作　　者：王栋[1] 林益[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》2002年第5期457-460,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 4 6 0 )

摘　　要：提出了一种分流分相式气液两相流体流量计 ,其采用转鼓作为分配器 ,从被测的两相流体中成比例地分流出约 2 0 %的气液混合物 ,并应用分离法分别测量出其中的气相和液相流量 ,然后根据比例关系确定被测两相流体的各相总流量 .理论分析和实验结果都证明 ,分流系数等于分流通道数与总通道数的比值 ,而与流型无关 .实验中出现的流型包括分层流、波状分层流和环状流 .在实验范围内 ,流量测量的平均误差小于 5 % .实验结果也表明 ,转鼓运动间隙是影响实际分流系数稳定性的主要因素 ,转鼓的加工精度愈低 ,运动间隙过大 。A extracting and separating method(ESM) type gas liquid two phase flow meter was proposed and tested in an air water two phase flow loop.By using a rotational drum distributor, a fraction (about 20%) of the twophase mixture was proportionally extracted and conducted to a small compact separator which separate the mixture into single phase gas and liquid. Convention al flowmeters were employed to meter the separated gas and liquid respectively. The total flow rates of each phase were then determined according to these metered values and the proportionali ties (extraction ratios). After the separated gas and liquid had been metered they were returned to the main stream again. Because only a small portion of the total flow is extracted the separator can be reduced in size greatly compard to the conventional separation method. Experiments confirmed that the extraction ratio is equal to the ratio of extraction channel number to the total flow channel number inside the drum and independent of flow patterns. The average error of flow rates measurement was less than 5%.

关 键 词：转鼓 分流分相式 气流两相流体 流量测量 流量计 

分 类 号：TH814[机械工程—仪器科学与技术]