| Z法气体超声波流量计湿气测量的虚高预测模型 |
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| 引用本文： | 徐英,陈阳,巴玺丽,尹存,张涛,石弘然.Z法气体超声波流量计湿气测量的虚高预测模型[J].化工学报,2013,64(11):4031-4038. |
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| 作者姓名： | 徐英 陈阳 巴玺丽 尹存 张涛 石弘然 |
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| 作者单位： | 1. 天津大学电气与自动化工程学院, 天津 300072;
2. 天津市过程检测与控制重点实验室, 天津 300072;
3. 中国石油天然气股份有限公司规划总院, 北京 100083;
4. 上海中核维思仪器仪表有限公司, 上海 201614 |
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| 基金项目： | 国家自然科学基金项目(60974118)~~ |
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| 摘 要： | 引言湿气通常是指气相为连续相,液相为离散相的气液两相流。美国机械工程师学会ASME将其界定为Lockhart-Martinelli参数(L-M参数)X<0.3的气液两相流1]。湿气普遍存在于自然界与工业现场中,如常规天然气田井口产出气(湿天然气)、煤层气、湿饱和蒸汽以及页岩气等均属湿气。随着工业生产的发展,对湿气不分离计量的要求越
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| 关 键 词： | Z法 气体超声波流量计 湿气测量 虚高 截面含气率 |
| 收稿时间： | 2013-04-08 |
| 修稿时间： | 2013-06-07 |
Over-reading prediction model of wet gas measurement using Z-shaped gas ultrasonic flow meter |
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| XU Ying;CHEN Yang;BA Xili;YIN Cun;ZHANG Tao;SHI Hongran.Over-reading prediction model of wet gas measurement using Z-shaped gas ultrasonic flow meter[J].Journal of Chemical Industry and Engineering(China),2013,64(11):4031-4038. |
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| Authors: | XU Ying;CHEN Yang;BA Xili;YIN Cun;ZHANG Tao;SHI Hongran |
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| Affiliation: | 1. School of Electrical and Automation Engineering, Tianjin University, Tianjin 300072, China;
2. Key Laboratory for Process Measurement and Control of Tianjin, Tianjin 300072, China;
3. PetroChina Planning & Engineering Institute, Beijing 100083, China;
4. China Nuclear Weisi Instrument Co., Ltd., Shanghai 201614, China |
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| Abstract: | In order to investigate the over-reading prediction model of wet gas measurement using gas ultrasonic flow meter,a Z-shaped gas ultrasonic flow meter prototype was selected to analyze its measuring principle and mechanism of over-reading when metering wet gas flow.The laboratory tests were conducted in TJU adjustable medium-pressure wet gas test loop.The over-reading of Z-shaped gas ultrasonic flow meter was mainly related to the void fraction of the pipe under a uniform film assumption with annular flow.Meanwhile,the correlation between void fraction and over-reading was deduced.Five typical void fraction correlations of gas/liquid two-phase flow in horizontal circular pipe were selected to calculate the predicted value of over-reading.The most appropriate void fraction correlation for predicting over-reading of Z-shaped type gas ultrasonic flow meter was the Armand-Massina correlation.The over-reading prediction model based on this void fraction correlation had prediction relative errors ranging from-7.77% to 4.90%,with a standard uncertainty of 0.98% at 95% confidence interval. |
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| Keywords: | Z-shaped gas ultrasonic flow meter wet gas measurement over-reading void fraction |
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