%0 Journal Article
%T Multi-scale entropy analysis of oil-gas-water three-phase flow patterns in vertical upward pipe<br>垂直上升管中油气水三相流流型多尺度熵分析
%A WANG Zhen-Ya
%A JIN Ning-De
%A ZONG Yan-Bo
%A WANG Zhen-Hua
%A WANG Tao
%A <br>王振亚
%J 地球物理学报
%D 2009
%I 
%X n order to study the flow property of oil-gas-water three-phase flow in vertical upward pipe, the conductance fluctuating signals of oil-gas-water flow in a 125 mm i.d. multiphase flow loop were acquired by using the combined measurement method of vertical multi-electrode array conductance sensor (VMEA) and mini-conductance probe array. Based on the determination of six three-phase flow patterns, the flow pattern maps for four total liquid mixture flow rates are constructed. Both the effect of the increase of oil in liquid volume fraction (fo) on flow pattern transition and the effect of superficial gas velocity (Usg) on the liquid inversion are discussed. Also the multi-scale entropy processing and analysis of conductance fluctuating signals acquired by VMEA sensor for five flow patterns with water as the continuous liquid are conducted. The study result indicates that the increase of fo makes oil in water type slug flow occur at lower Usg; for low flow velocity, the continuous liquid inversion occurs at about fo=0.9 and the increase of Usg makes the inversion point move to low oil volume fraction; the multi-scale entropy (MSE) detail describes the nonlinear dynamic characteristics of oil-gas-water flow patterns and the rate of MSE at low scales sensitively indicates the variation of flow patterns and can act as the efficient criterion of three-phase flow patterns identification. And multi-scale entropy is helpful to understand the nonlinear dynamic characteristics of oil-gas-water flow patterns.
%K Oil-gas-water three-phase flow
%K Flow pattern identification
%K VMEA sensor
%K Multi-scale entropy<br>油气水三相流
%K 流型识别
%K VMEA传感器
%K 多尺度熵
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=98BC26E37198F73F3DC4D0B8CB2202B2&yid=DE12191FBD62783C&vid=286FB2D22CF8D013&iid=9CF7A0430CBB2DFD&sid=2322AFA7527B5E70&eid=BDA0C56EE29C3304&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=0&reference_num=32