摘要
为了进一步提高同向出流水力旋流器的分离性能,提出一种由注气锥端口注气对油核形成气举的方法。采用计算流体动力学方法,针对不同的进气速度对旋流器内流场分布特性及分离性能的影响开展了数值模拟研究,分析了不同进气速度条件对速度场、轴向压降和油相体积分数的影响规律。数值模拟结果显示:注气口附近液流轴向速度随进气速度增加呈现出逐渐升高的趋势,当进气速度由0.5 m/s增大到3.0 m/s时,轴向速度由0.9 m/s升高至5.5 m/s;注气口附近液流轴向压降随进气速度的增加而逐渐减小,当进气速度由0.5 m/s增大到3.0 m/s时,轴向压降由214.7 kPa降低至213.0 kPa;通过注气实现对油核的推举,提升了油核由溢流管流出的速度;随着进气速度的增大,旋流器的分离效率呈先升高后降低的趋势,当进气速度为1.0 m/s时达到最大分离效率76.57%。研究结果可为气举式旋流器的现场应用提供理论指导。
In order to further improve the separation performance of the cocurrent outflow hydrocyclone,a method of injecting gas from the gas injection cone port to form gas lift for oil core was proposed.Based on Reynolds stress model,the computational fluid dynamics method was used to carry out numerical simulation study on the influence of different intake velocities on the flow field distribution characteristics and separation performance of hydrocyclone,and analyze the effect of different intake velocities on the velocity field,axial pressure drawdown and oil phase volume fraction.The numerical simulation results show that the axial velocity of the liquid flow near the gas injection port increases gradually with the increase of the intake velocity,when the intake velocity increases from 0.5 m/s to 3.0 m/s,the axial velocity increases from 0.9 m/s to 5.5 m/s;the axial pressure drawdown of the liquid flow near the gas injection port gradually decreases with the increase of the intake velocity,when the intake velocity increases from 0.5 m/s to 3.0 m/s,the axial pressure drawdown decreases from 214.7 kPa to 213.0 kPa;the gas injection realizes the push of oil core,which accelerates the outflow velocity of oil core from the overflow tube;as the intake velocity increases,the separation efficiency of cyclone increases firstly and then decreases,and when the intake velocity is 1.0 m/s,the maximum separation efficiency reaches 76.57%.The study results provide theoretical guidance for the application of gas lift cyclones.
作者
李枫
刘海龙
邢雷
朱雨朦
高金明
Li Feng;Liu Hailong;Xing Lei;Zhu Yumeng;Gao Jinming(School of Mechanical Science and Engineering of Northeast Petroleum University;Heilongjiang Key Laboratory of Petroleum and Petrochemical Multi-phase Media Treatment and Pollution Prevention)
出处
《石油机械》
北大核心
2021年第8期100-106,141,共8页
China Petroleum Machinery
基金
大庆市指导性科技计划项目“高气液比单井注采井除气油水分离系统研究”(zd-2019-19)。
关键词
进气速度
旋流器
同相出流
分离效率
数值模拟
intake velocity
cyclone
cocurrent outflow
separation efficiency
numerical simulation
