摘要
为了研究不同结构参数对气井排液效果的影响,采用Fluent流体仿真软件对涡流排液采气工具进行了流场模拟。建模时采用雷诺平均假设下的N-S方程作为计算的基本方程,并采用RSM模型对N-S方程进行封闭,同时采用壁面函数处理壁面边界层的流场。分析结果表明,涡流工具的顶角对整体流场影响较小,使用时仅需满足打捞头相关尺寸即可;减小螺旋角对分离效果影响不大,同时减小螺旋角会大幅增加压力损失,因此选取螺旋角为70°;内柱直径为45 mm时有利于气、液两相的分离;最好选用1.50倍导程,倍数过大时会增加能耗。
In order to study the effect of structural parameters on liquid discharge performance of the vortex tool in gas well, the Fluent software is used to simulate the vortex tool. In modeling, the N-S equation under the assumption of Reynolds average is used as the basic equation, and RSM model is used for closing N-S equation. While the wall function is adopted to process flow field of wall boundary. The results show that the vertex angle of the vortex tools has little effect on the overall flow field and only need to be adjusted according to the relevant dimensions of the fishing head. The decrease of the helix angle has little effect on the separation performance but will substantially increase the pressure losses, and the optimized helix angle is 70°. The inner column with the diameter of 45 mm is better for gas-liquid two-phase separation. The energy consumption will increase with too large helix lead number, and the optimized number is 1.50.
出处
《石油机械》
北大核心
2014年第8期111-115,共5页
China Petroleum Machinery
关键词
涡流排液
气井
数值模拟
螺旋角
导程
顶角
vortex tool for liquid discharge
gas well
numerical simulation
helix angle
helix lead
vertex angle
