基于双锥流量计差压信号的气液两相流参数测量-高校化学工程学报.PDF

第29 卷第1 期 高 校 化 学 工 程 学 报 No.1 Vol.29 2015 年 2 月 Journal of Chemical Engineering of Chinese Universities Feb. 2015 文章编号：1003-9015(2015)01-0084-06 基于双锥流量计差压信号的气液两相流参数测量 谢代梁, 朱 跃, 徐志鹏, 梁晓瑜, 刘铁军 ( 中国计量学院 计量测试工程学院, 浙江 杭州 310018) 摘 要：设计了一种结构简单、加工工艺要求较低的双锥流量计，在此基础上提出了基于单个差压式流量计的气液两 相流参数测量方法。提取双锥流量计差压波动信号的无量纲特征值，利用该参数建立气相体积含率的测量模型。通过 对双锥流量计差压信号均值的分析表明，Lockhart-Martinelli 常数与准气相流量比存在优良的线性关系，根据该线性关 系建立了双锥流量计气液两相流流量测量模型。在气水两相流装置上开展了实验研究，结果表明，所建立的分相含率 测量模型可在实验范围内对气相体积含率进行有效的测量，测量相对误差在8% 以内；对气液两相流总流量和液相流 量的测量误差可在5% 以内。 关键词：气液两相流；流量；气相含率；测量 中图分类号：TQ056.15 文献标识码：A DOI ：10.3969/j.issn.1003-9015.2015.01.012 Gas-Liquid Two-Phase Flow Measurement Using Differential Pressure Signals from a Dual-Cone Flowmeter XIE Dai-liang, ZHU Yue, XU Zhi-peng, LIANG Xiao-yu, LIU Tie-jun (College of Metrological Technology Engineering, China Jiliang University, Hangzhou 310018, China) Abstract: A dual-cone flowmeter with advantages of simple structure and easy fabrication was designed, and it was used to measure parameters of gas-liquid two-phase flow through analysis of signals from a single differential pressure flowmeter. Non-dimensional characteristic values of the differential pressure signals were extracted to establish a measurement model for gas volume fraction. Good linear relationship was obtained between the Lockhart-Martinelli constant and the quasi-ration of the gas flowrate by investigation of the average differential pressures of the dual-cone flowmeter. The results show that a modified flowrate measurement model