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水平气液两相流流型空间图像信息复杂性测度分析 被引量:14

Analysis of complexity measures of gas-liquid two-phase flow pattern image in horizontal pipe
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摘要 To discuss the relationship between complexity measures extracted from gray image time series and flow pattern transition in gas-liquid two-phase flow,three complexity measures,including Lempel-Ziv complexity,fractal box dimension,and Shannon information entropy were extracted from sixty flow pattern image signals of gas-liquid two-phase flow in the horizontal pipe by using digital high speed video systems.Based on the above studies,the chaos dynamic characteristics of three complexity measures in different gas superficial velocities,and the recognition capability of gas-liquid two-phase flow pattern were analyzed.The results indicated that these three complexity measures were sensitive to the flow pattern transition in gas-liquid two-phase flow.By analyzing the changes of three complexity measures with gas-liquid two-phase flow parameters,the dynamics structure inversion characteristics of gas-liquid two-phase flow could be got,which provided an efficient,supplementary diagnostic tool to reveal the flow pattern transition mechanism of gas-liquid two-phase flow and quantitatively identify flow pattern. To discuss the relationship between complexity measures extracted from gray image time series and flow pattern transition in gas-liquid two-phase flow, three complexity measures, including Lempel-Ziv complexity, fractal box dimension, and Shannon information entropy were extracted from sixty flow pattern image signals of gas-liquid two-phase flow in the horizontal pipe by using digital high speed video systems. Based on the above studies, the chaos dynamic characteristics of three complexity measures in different gas superficial velocities, and the recognition capability of gas-liquid two-phase flow pattern were analyzed. The results indicated that these three complexity measures were sensitive to the flow pattern transition in gas-liquid two-phase flow. By analyzing the changes of three complexity measures with gas-liquid two-phase flow parameters, the dynamics structure inversion characteristics of gas-liquid two-phase flow could be got, which provided an efficient, supplementary diagnostic tool to reveal the flow pattern transition mechanism of gas-liquid two-phase flow and quantitatively identify flow pattern.
作者 周云龙 陈飞
出处 《化工学报》 EI CAS CSCD 北大核心 2008年第1期64-69,共6页 CIESC Journal
基金 吉林省科技发展项目(20040513)~~
关键词 气液两相流 流型图像 Lempel—Ziv复杂度 分形盒维数 Shannon信息熵 gas-liquid two-phase flow flow dimension Shannon information entropy pattern image Lempel Ziv complexity fractal box
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