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

非牛顿流体中垂直上升油气水三相泡状流及段塞流的动力学特性非线性检验(英文)

作　　者：朱雷 金宁德 高忠科 杜萌 王振亚 

机构地区：[1]School of Electrical Engineering&Automation,Tianjin University

出　　处：《Chinese Journal of Chemical Engineering》2012年第5期870-882,共13页中国化学工程学报（英文版）

基　　金：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

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.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 conductaJace fluctuating signals time-frequency representation surrogate data method 

分 类 号：TQ021[化学工程]