脉动条件下旋流场内气液两相流流型及其转变机理  

Study on flow pattern and transition mechanism of gas-liquid two-phase flow in swirl field under pulsating flow

作　　者：杨蕊[1,2] 朱宝锦 吕超 张磊 肖迎松[1,2] YANG Rui;ZHU Baojin;LYU Chao;ZHANG Lei;XIAO Yingsong(School of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multiphase Treatment and Pollution Prevention,Daqing 163318,Heilongjiang,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]黑龙江省石油石化多相介质处理及污染防治重点实验室,黑龙江大庆163318

出　　处：《化工学报》2022年第10期4389-4398,共10页CIESC Journal

基　　金：东北石油大学青年科学基金项目(2018QNL-50)。

摘　　要：运用高速摄像技术对流量脉动条件下旋流分离器内气泡动力学行为及气液两相流流型展开研究。研究发现,在完整脉动周期内,流量在3.62~4.18 m^(3)/h范围内波动,流量增大段的气核整体向溢流口方向运移,流量减小段的气核整体向底流口方向运移,气核大小及形态变化呈现周期往复性。通过脉动周期内特殊帧的分析,得出流量脉动条件下旋流场内气液两相流流型主要包括:气泡流、塞状流、弹状流、丝状流及波状流等五种形式。根据实验得出的气液两相折算速度,确定了脉动条件下气液两相流流型转换界限图,而气泡间的聚并破碎行为是产生气液两相流型的主要原因,最终构建了表征截面含气量和分离效率之间关系的评价模型。Using high-speed camera technology,the dynamic behavior of bubbles and gas-liquid two-phase flow pattern in the cyclone separator were studied under the condition of flow pulsation.It was found that the flow fluctuated in the range of 3.62-4.18 m^(3)/h during the full pulsation cycle.In the flow-enhancing section,the gas core migrates toward the overflow as a whole.And the gas core migrates toward the bottom cone as a whole in the flow-decreasing section,and the size and shape of the gas core changes periodically.Through the analysis of special frames in the pulsation period,it is concluded that the gas-liquid two-phase flow patterns in the swirl field under the condition of flow pulsation mainly include:bubble flow,plug flow,slug flow,silk flow and wavy flow.According to the experiment,the converted velocity of gas-liquid two-phase is obtained.And the limit diagram of the flow pattern conversion of gas-liquid two-phase flow is determined under pulsating conditions.The coalescence and fragmentation behavior between bubbles is the main reason for generating the gas-liquid two-phase flow pattern.Ultimately,an evaluation model was constructed to characterize the relationship between cross-section gas content and separation efficiency.

关 键 词：脉动 气泡 流体动力学 气液两相流 流型 聚并破碎 

分 类 号：TE329[石油与天然气工程—油气田开发工程]