基于EE MD气液两相流差压信号时频分析

孙斌, 刘彤, 赵鹏

孙斌, 刘彤, 赵鹏. 基于EE MD气液两相流差压信号时频分析[J]. 实验流体力学, 2014, (5): 47-52. DOI: 10.11729/syltlx20130036
引用本文: 孙斌, 刘彤, 赵鹏. 基于EE MD气液两相流差压信号时频分析[J]. 实验流体力学, 2014, (5): 47-52. DOI: 10.11729/syltlx20130036
Sun Bin, Liu Tong, Zhao Peng. Time-frequency analysis on differential pressure signal of two-phase flow based on EEMD[J]. Journal of Experiments in Fluid Mechanics, 2014, (5): 47-52. DOI: 10.11729/syltlx20130036
Citation: Sun Bin, Liu Tong, Zhao Peng. Time-frequency analysis on differential pressure signal of two-phase flow based on EEMD[J]. Journal of Experiments in Fluid Mechanics, 2014, (5): 47-52. DOI: 10.11729/syltlx20130036

基于EE MD气液两相流差压信号时频分析

基金项目: 

浙江省自然科学基金

国家质检总局公益项目

详细信息
  • 中图分类号: 11-5266/V

Time-frequency analysis on differential pressure signal of two-phase flow based on EEMD

  • 摘要: 为研究气液两相流流动过程的动态特性,采用V形内锥作为测量装置,通过高频差压变送器获得不同流型下的动态信号,提出了一种基于总体平均经验模式分解(EEMD)的气液两相流时频分析方法。通过对不同流型下的气液两相流的差压信号进行分析,研究了气液两相流的流动机理,为气液两相流流型及流量的准确测量奠定理论基础。分析发现EEMD的抗混分解能力很好,可以准确地提取两相流差压信号的频率成分及其时变情况,为今后两相流的识别提供理论基础,具有较高的工程应用价值。
    Abstract: In order to study the dynamic characteristics of gas-liquid two-phase flow,a time-frequency analysis method of gas-liquid two-phase flow is proposed based on ensemble empirical mode decomposition (EEMD),using V cone flowmeter as a measuring device and the high fre-quency differential pressure transmitter to obtain the dynamic signal under different flow pat-terns.In order to lay the theoretical foundation for the further research on gas-liquid two-phase flow mechanism and accurate measurement of the flow,the differential pressure signals of the gas-liquid two-phase flow for different flow regimes are analyzed thoroughly.The analysis shows that EEMD exhibits a satisfying mixing decomposition ability,as it can extract frequency compo-nents of differential pressure signal of two-phase flow and the real-time situation accurately.It provides the theoretical basis for the identification of two-phase flow in future and has a high val-ue to engineering application.
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出版历程
  • 刊出日期:  2014-10-24

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