Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows

Chin.J.Chem.Eng. ›› 2012, Vol. 20 ›› Issue (5): 870-882.

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Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows

ZHU Lei, JIN Ningde, GAO Zhongke, DU Meng, WANG Zhenya

School of Electrical Engineering & Automation, Tianjin University, Tianjin 300072, China

Received:2011-04-17 Revised:2011-10-04 Online:2012-11-06 Published:2012-10-28
Supported by:
Supported by the National Natural Science Foundation of China (50974095, 41174109);Gao Zhongke (高忠科) was also supported by the National Natural Science Foundation of China (61104148);the National Science and Technology Major Projects (2011ZX05020-006);Specialized Research Fund for the Doctoral Program of Higher Education of China(20110032120088);the Independent Innovation Foundation of Tianjin University

Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows

朱雷, 金宁德, 高忠科, 杜萌, 王振亚

School of Electrical Engineering & Automation, Tianjin University, Tianjin 300072, China

通讯作者: JIN Ningde,E-mail:ndjin@tju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (50974095, 41174109);Gao Zhongke (高忠科) was also supported by the National Natural Science Foundation of China (61104148);the National Science and Technology Major Projects (2011ZX05020-006);Specialized Research Fund for the Doctoral Program of Higher Education of China(20110032120088);the Independent Innovation Foundation of Tianjin University

Abstract

Abstract: Based on the conductance fluctuation signals measured from vertical upward oil-gas-water three-phase flow experiment, time frequency representation and surrogate data method were used to investigate dynamical characteristics of oil-in-water type bubble and slug flows. The results indicate that oil-in-water type bubble flow will turn to deterministic motion with the increase of oil phase fraction f_o and superficial gas velocity U_sg under fixed flowrate of oil-water mixture Q_mix. The dynamics of oil-in-water type slug flow becomes more complex with the increase of U_sg under fixed flowrate of oil-water mixture. The change of f_o leads to irregular influence on the dynamics of slug flow. These interesting findings suggest that the surrogate data method can be a faithful tool for characterizing dynamic characteristics of oil-in-water type bubble and slug flows.

Key words: oil-gas-water three-phase flow, conductance fluctuating signals, time-frequency representation, surrogate data method

摘要： Based on the conductance fluctuation signals measured from vertical upward oil-gas-water three-phase flow experiment, time frequency representation and surrogate data method were used to investigate dynamical characteristics of oil-in-water type bubble and slug flows. The results indicate that oil-in-water type bubble flow will turn to deterministic motion with the increase of oil phase fraction f_o and superficial gas velocity U_sg under fixed flowrate of oil-water mixture Q_mix. The dynamics of oil-in-water type slug flow becomes more complex with the increase of U_sg under fixed flowrate of oil-water mixture. The change of f_o leads to irregular influence on the dynamics of slug flow. These interesting findings suggest that the surrogate data method can be a faithful tool for characterizing dynamic characteristics of oil-in-water type bubble and slug flows.

关键词: oil-gas-water three-phase flow, conductance fluctuating signals, time-frequency representation, surrogate data method

ZHU Lei, JIN Ningde, GAO Zhongke, DU Meng, WANG Zhenya. Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows[J]. Chin.J.Chem.Eng., 2012, 20(5): 870-882.

朱雷, 金宁德, 高忠科, 杜萌, 王振亚. Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows[J]. Chinese Journal of Chemical Engineering, 2012, 20(5): 870-882.

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Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows

Testing for Nonlinearity in Dynamic Characteristics of Vertical Upward Oil-Gas-Water Three-phase Bubble and Slug Flows

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