Flow detection technology based on acoustic emission of gas-liquid two-phase flow in vertical pipe

被引：0
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作者：
机构：
[1] School of Quality and Technology Supervising, Hebei University, Baoding 071002, Hebei
来源：
Zhang, Y. (fengkuangyao@sina.com) | 1600年 / Materials China卷 / 65期
关键词：
Acoustic emission; Flow pattern identification; Measurement; Multiphase flow; Shannon entropy;
D O I：
10.3969/j.issn.0438-1157.2014.04.013
中图分类号：
学科分类号：
摘要：
Acoustic emission (AE) as a technology of non-destructive detection for measuring the gas-liquid two-phase flow is superior to traditional method in non-invasiveness, no destruction of test pipe and flow field distribution, strong signal, and high sensitivity. The experiment was operated on a multiphase flow experimental device in Hebei University. Experiments based on the data processing method collected the features of gas-liquid two-phase flow in vertical pipe. The acoustic emission technology could reflect the dynamic characteristics of the typical flow patterns: bubbly flow, slug flow, annular flow, and the transition state of emulsified foam had some obviously differences in the time domain and frequency domain signals. There was a big difference between the values of Shannon entropy of wavelet energy and wavelet packet decomposition. The state of two-phase flow in vertical pipe was verified, and four typical flow patterns were accurately identified with pattern recognition. The acoustic emission technology is likely to be a new method for detection of gas-liquid two-phase flow. © All Rights Reserved.
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页码：1243 / 1250
页数：7
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