Hits:

Date of Publication:2015-01-01

Journal:大连理工大学学报

Issue:5

Page Number:470-477

ISSN No.:1000-8608

Abstract:As a nonlinear dynamic system,the flow evolution dynamics characteristics of gas-liquid two-phase flow are not clear.Air-water two-phase flow in vertical upward pipe is selected as the obj ect.Based on differential pressure time series measured from flow simulation experiment system, flow regime complex network(FRCN)and flow evolution complex network(FECN)are constructed to study gas-liquid two-phase flow pattern and its nonlinear dynamics characteristics.Through detecting the community structures of FRCN,the corresponding relations between community structures and flow patterns are obtained,consequently five flow patterns including transitional flow patterns are distinguished and identified.Through analyzing the FECN,it is found that the FECN of different flow patterns presents different community structures,and the evolutionary trend of FECN's network information entropy has close relation to the flow pattern transition,which can be employed to reveal the dynamics characteristics of gas-liquid two-phase flow evolution in vertical upward pipe.

Note:新增回溯数据