Phase separation flow measurement of plug flow based on ensemble learning and information fusion

doi:10.3969/j.issn.1000-1565.2024.05.011

Abstract

Abstract: Plug flow is a typical flow pattern in gas-liquid two-phase flow, and accurate measurement of plug flow is conducive to real-time monitoring and optimizing process of production process, ensuring safe and economical operation of the system. Based on the improved Venturi tube with long throat diameter, an intelligent multi-sensor system for horizontal gas-liquid flow is designed, which integrates near infrared(NIR)and acoustic emission(AE)technology. AE sensor and NIR sensor were used to detect the gas-liquid phase interaction and disturbance information, and empirical mode decomposition(EMD)was used to extract the characteristic variables of gas volume fraction. The integrated learning algorithm was used- DOI:10.3969/j.issn.1000-1565.2024.05.011基于集成学习和信息融合的段塞流分相流量测量温佳祺^1,2,杨叙宁^1,2,李金硕¹,丁振君^1,3,董芳^1,3(1.河北大学质量技术监督学院,河北保定 071002;2.零碳能源建筑与计量技术教育部工程研究中心,河北保定 071002;3.计量仪器与系统国家地方联合工程研究中心,河北保定 071002)摘要:段塞流是气液两相流中典型流型,准确测量其分相流量有利于实时监控生产过程,优化工艺控制,确保系统在安全、经济的工况下运行.本文在改进长喉文丘里管的基础上,设计了一种集近红外(NIR)、声发射(AE)技术于一体的水平气液流量智能多传感系统.利用AE传感器和NIR传感器检测气液两相的流动噪声信息和截面信息,采用经验模态分解法(EMD)提取气体体积分数的特征变量.通过集成学习算法进行特征级融合,融合后的段塞流体积含气率预测模型平均绝对百分比误差(MAPE)为4.11%,92.45%的预测结果偏差在±10%以内.在Collins模型的基础上,提出了基于梯度提升决策树(GBDT)的段塞流质量流量预测模型,其MAPE值为0.96%,全部预测结果的偏差在±20%以内.本研究为气液两相流段塞流参数混合不分离测量提供了一种新方法,为气液两相流动机理研究奠定了基础.关键词:气液两相流;数据融合;段塞流;多传感器;集成学习算法中图分类号:TH814 文献标志码:A 文章编号:1000-1565(2024)05-0541-10Phase separation flow measurement of plug flow based on ensemble learning and information fusionWEN Jiaqi^1,2,YANG Xuning^1,2,LI Jinshuo¹, DING Zhenjun^1,3, DONG Fang^1,3(1. School of Quality and Technical Supervision, Hebei University, Baoding 071002, China; 2. Engineering Research Center of Zero-carbon Energy Bulidings and Measurement Techniques,Ministry of Education,Baoding 071002,China;3. National and Local Joint Engineering Research Center for Measuring Instruments and Systems, Baoding 071002, China)Abstract: Plug flow is a typical flow pattern in gas-liquid two-phase flow, and accurate measurement of plug flow is conducive to real-time monitoring and optimizing process of production process, ensuring safe and economical operation of the system. Based on the improved Venturi tube with long throat diameter, an intelligent multi-sensor system for horizontal gas-liquid flow is designed, which integrates near infrared(NIR)and acoustic emission(AE)technology. AE sensor and NIR sensor were used to detect the gas-liquid phase interaction and disturbance information, and empirical mode decomposition(EMD)was used to extract the characteristic variables of gas volume fraction. The integrated learning algorithm was used- 收稿日期:2024-03-06;修回日期:2024-05-02 基金项目:国家自然科学基金资助项目(62173122);河北省自然科学基金资助项目(F2022201034) 第一作者:温佳祺(2000—),女,河北大学在读硕士研究生,主要从事多相流理论及参数检测技术研究.E-mail:benben93657@163.com 通信作者:董芳(1980—),女,河北大学讲师,主要从事多相流参数检测及信息处理技术研究.E-mail:dongfang1023@163.com第5期温佳祺等:基于集成学习和信息融合的段塞流分相流量测量河北大学学报(自然科学版) 第44卷for feature-level fusion. The mean absolute percentage error(MAPE)of the fused plug flow volume gas content prediction model was 4.11%, and the deviation of 92.45% of the predicted results was within ±10%. On the basis of Collins model, a mass flow prediction model of plug flow based on gradient lifting decision tree(GBDT)is proposed. The MAPE value of GBDT is 0.96%, and the deviation of all prediction results is within ±20%. This study provides a new method for measuring the parameters of gas-liquid two-phase plug flow, which provides a research basis for sensing mechanism and measurement of multiphase flow.

Key words: gas-liquid two-phase flow, data fusion, plug flow, multi-sensor, ensemble learning algorithm

CLC Number:

TH814

WEN Jiaqi,YANG Xuning,LI Jinshuo, DING Zhenjun, DONG Fang. Phase separation flow measurement of plug flow based on ensemble learning and information fusion[J]. Journal of Hebei University(Natural Science Edition), 2024, 44(5): 541-550.

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