应用强制环状流的湿气双参数测量方法

A Dual-Parameter Measuring Method of Wet Gas Appling Forced Annular Flow

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摘要针对湿气中液相含量测量困难以及湿气流型对测量精度影响较大的问题,首先设计了一种由旋流器和文丘里管喷嘴组成的湿气双参数测量装置。该装置利用旋流器将湿气调整成强制环状流,引入了用强制环状流状态下文丘里管喷嘴节流压差与离心压差之比表示的无量纲数M,分别确定了湿气虚高和液气质量流量比与M和气相弗劳德数Fr g之间的关系,进而建立了湿气双参数测量模型。通过数值模拟对测量装置内的流场特性进行了分析,并搭建室内实验平台对建立的湿气测量模型进行了验证。实验结果表明:在气相弗劳德数为0.7~1.5以及Lockhart-Martinelli数为0~0.2的范围内,湿气气相流量测量误差在±3%以内,液相测量误差在±10%以内。该测量方法将为工业生产中湿气的实时测量提供一种新的思路,具有一定的工程意义。 A dual-parameter measuring device of wet gas is designed to solve the difficulty in measuring liquid content in wet gas and the influence of the flow pattern on wet gas measurement accuracy,and the device consists of a swirler and a Venturi nozzle.The device uses a swirler to reform the wet gas flow into a forced annular flow.Lockhart-Martinelli parameter expressed by the ratio of the Venturi throttle pressure difference to the centrifugal pressure difference under the condition of forced annular flow is constructed.The relationships of the over-reading of wet gas flow-rate and the liquid-gas flow ratio with the M parameter and the gas phase Froude number Fr g are determined respectively to establish the two-parameter measurement model of wet gas.The flow field characteristics in the measuring device are analyzed through numerical simulation,and an indoor experimental platform is established to verify the proposed model.Results show that when Froude number is in the range of 0.7-1.5 and the Lockhart-Martinelli parameter is in the range of 0-0.2,the measurement error of gas phase is within±3%and of liquid phase is within±10%.This measuring method will provide a new idea for real-time measurement of wet gas in industrial production and has certain engineering significance.

作者孟宇飞张兴凯廖锐全王栋 MENG Yufei;ZHANG Xingkai;LIAO Ruiquan;WANG Dong(School of Petroleum Engineering,Yangtze University,Wuhan 430100,China;Laboratory of Multiphase Pipe Flow of Gas Lift Innovation Center of CNPC,Yangtze University,Wuhan 430100,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区长江大学石油工程学院长江大学中国石油天然气集团公司气举试验基地多相流实验室西安交通大学动力工程多相流国家重点实验室

出处《西安交通大学学报》 EI CAS CSCD 北大核心 2020年第10期28-35,44,共9页 Journal of Xi'an Jiaotong University

基金国家“十三五”重大专项资助项目(2016ZX05046004-003) 湖北省教育厅科研计划资助项目(Q20191310) 国家自然科学基金资助项目(61572084)。

关键词湿气测量文丘里管强制环状流径向压差双参数测量 wet gas measurement Venturi meter forced annular flow radial pressure difference dual-parameter measurement

分类号 TH814 [机械工程—精密仪器及机械]

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参考文献5

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