基于递归图的两相流流动特性分析与流型识别

doi:10.3969/j.issn.1000-1158.2022.11.08

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Abstract Based on the experimental data of gas-liquid two-phase flow in vertical pipeline collected by digital electrical resistance tomography (ERT) system, one-dimensional time series are generated by calculating the mean value of the data collected at different times, and the phase space is reconstructed to draw its recurrent plot. After threshold segmentation, the two-phase flow characteristics can be analyzed effectively. At the same time, the range of image information entropy of different flow patterns corresponding to threshold free recurrent plot is calculated as follows:bubbly flow, 0.570~0.650; transition flow pattern from bubbly flow to slug flow, 2.300~3.200; slug flow, 3.650~4.100; plug flow:4.300~4.600, and flow pattern from plug flow to mixed flow:4.650~4.950.The range of information entropy of each flow pattern recursion graph image is obviously separated, which can effectively identify five flow patterns.

Key words： metrology electrical resistance tomography recurrent plot flow pattern identification flow characteristic gas-liquid two-phase flow

Received: 13 May 2021 Published: 14 October 2022

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	ZHANG Li-feng
	WANG Zhi

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ZHANG Li-feng,WANG Zhi. Flow Characteristics Analysis and Flow Pattern Recognition of Two-phase Flow Based on Recurrent Plot[J]. Acta Metrologica Sinica, 2022, 43(11): 1438-1444.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2022.11.08 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2022/V43/I11/1438

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