摘要
利用微气泡不易聚并的流体特性,提出了采用微气泡抑制段塞流的新方法.针对实验室规模的海洋石油工业集输立管系统内段塞流流动过程,利用电阻层析成像技术(ERT)、压力信号分析法和高速摄像法对垂直管段塞流特性和微气泡开展了实验研究,获得了段塞流典型流型以及微气泡流体特性.在微气泡流体特性研究的基础上,进一步探索了微气泡对段塞流的抑制作用,实验结果表明:尺寸范围在1~50μm之间的微气泡,在进气量设定为4 L/min时可在一定流速范围的液体中稳定存在;在气液比为1.18、1.36和1.82时,微气泡对弹状段塞流的发生频率有显著抑制作用,微气泡通过增大边界层的返混和扰动阻力,抑制了段塞的运动,从而降低了段塞的发生频率.
The microbubbles with the diameter of being less than 50 μm were uneasy to aggregate in fluid, and thus a method was proposed to suppress slug flow by the addition of microbubbles. The characteristics of the slug flow in a laboratory-scale offshore oil industry gathering-rising system were experimentally studied and analyzed by an electrical resistance tomography(ERT) combined with a pressure method and a high-speed camera method. The typical flow pattern and the motion behavior of the slug flow under different conditions were tested, and the flow performances of the microbubbles were evaluated. The influences of microbubbles on the slug flow formation were further investigated. Experimental results show that the microbubbles with a size range of 1 to 50 μm can be stably existed in a certain range of the flow rate when the intake air amount is set to 4 L/min. When the gas-liquid ratios are 1.18, 1.36 and 1.82, the microbubbles have a significant suppressing effect on the occurrence frequency of the slug flow. The mechanism is that the microbubbles suppress the movement of the slug by increasing the back mixing and disturbance resistance of the boundary layer, thus reducing the frequency of the slug generation.
作者
方振旅
赵陆海波
李健
唐志永
许传龙
Fang Zhenlü;Zhaolu Haibo;Li Jian;Tang Zhiyong;Xu Chuanlong(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China;Key Laboratory of Low-Carbon Conversion Science and Engineering of Shanghai Advanced Research of Institute,Chinese Academy of Sciences,Shanghai 201210,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第3期527-534,共8页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(51676044)
江苏省重点研发计划(社会发展)资助项目(BE2018705)
中国科学院低碳转化科学与工程重点实验室开放课题资助项目(KLLCCSE-201703)
关键词
微气泡
段塞流
抑制
电阻层析成像
高速摄像
microbubbles
slug flow
suppression
electrical resistivity tomography
high-speed camera
