CAJ | 학술논문

气液两相流作为一个非线性动力系统，其流动演化动力学特性尚未得到清楚的认识。以垂直上升管内空气-水两相流为研究对象，在通过流态模拟实验系统获取流态压差时间序列的基础上，构建流态复杂网络和流动演化复杂网络对气液两相流流型及其非线性动力学特性进行了研究。通过对流态复杂网络社团结构的分析获得了其社团结构与不同流型的对应关系，从而实现了对包括过渡流型在内的5种流型的辨识。通过对流动演化复杂网络分析发现，不同流型的流动演化复杂网络呈现出不同的社团结构，而且网络的信息熵演化趋势与流型转化过程密切相关，可以较好地揭示垂直上升管内气液两相流流态演化的动力学特性。
기액량상류작위일개비선성동력계통，기류동연화동역학특성상미득도청초적인식。이수직상승관내공기-수량상류위연구대상，재통과류태모의실험계통획취류태압차시간서렬적기출상，구건류태복잡망락화류동연화복잡망락대기액량상류류형급기비선성동역학특성진행료연구。통과대류태복잡망락사단결구적분석획득료기사단결구여불동류형적대응관계，종이실현료대포괄과도류형재내적5충류형적변식。통과대류동연화복잡망락분석발현，불동류형적류동연화복잡망락정현출불동적사단결구，이차망락적신식적연화추세여류형전화과정밀절상관，가이교호지게시수직상승관내기액량상류류태연화적동역학특성。
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.