摘要
利用Fluent软件,将油相体积分数为2%、油滴粒径为40μm的混合介质作为研究对象,对主直径为28mm、小锥角为1.5°的不同大锥角的井下油水分离水力旋流器内部流场进行数值模拟,得到不同大锥角时切向速度、轴向速度、油相体积分数分布以及压力降与分离效率的关系.结果表明,当大锥角为26°时,外涡流区最大切向速度最靠近中心点,内涡流区切向速度沿径向的速度梯度变化不大,可降低液滴的剪切破碎;旋流器轴心处油相体积分数最大,混合介质中油相体积分数达到95.0%,在壁面附近油相体积分数很小,此时水力旋流器的分离效果较好,可为井下油水分离旋流器的结构优化设计提供指导.
The numerical simulation of the downhole oil/water separation hydrocyclone was carried out,and the distribution rules of axial velocity and tangential velocity of the flow inside hydrocyclone were obtained on different large cone angle.Moreover,focusing on the mixed medium of volume fraction 2% and oil drop let particle size 40 μm,the volume fraction distribution of oily-water was analyzed.When the large cone angle was 26,the biggest oil phase volume fraction locates at the center of the hydrocyclone,which contains the volume fraction as high as 95.0%;while the volume fraction is very small near the wall surface,which indicates that the separation effect of the hydrocyclone is satisfied.The numerical simulation can provide a foundation for further study of structural optimization design of hydrocyclones.
出处
《大庆石油学院学报》
CAS
北大核心
2009年第2期78-80,126,共3页
Journal of Daqing Petroleum Institute
基金
黑龙江省教育厅科研项目基金(11531008)
关键词
大锥角
水力旋流器
井下油水分离
Fluent软件
数值模拟
large conical section
hydrocyclone
downhole oil/water separation
Fluent software
numerical simulation
