局部弯曲管道对气力提升泵流动特性影响研究  

Study on Influence of Locally Curved Pipe on Flow Characteristics of Pneumatic Lifting Pump

作　　者：吴霜 左娟莉[1] 李国栋[1] 王震宇[1] 魏炳乾[1] 侯精明 Wu Shuang;Zuo Juanli;Li Guodong;Wang Zhenyu;Wei Bingqian;Hou Jingming(State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学西北旱区生态水利国家重点实验室,西安710048

出　　处：《水动力学研究与进展（A辑）》2023年第6期943-955,共13页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金(11605136,52079107);中国博士后科学基金(2021M692601);陕西省自然科学基础研究计划项目(2021JM-324);陕西省水利厅项目(2022slkj-16)。

摘　　要：气力提升泵是通过注入压缩空气输送流体或使流体增压的机械。相比于传统机械泵,该泵具有环境污染少、适合不规则井和安全性高等显著优势,已被广泛运用于油田开采、污水处理以及河道清淤与疏浚等领域。该文基于Fluent仿真软件,采用欧拉多相流模型和Standard k-ω湍流模型对s型弯管(两种弯曲位置:上弯管及下弯管;三种弯曲角度:30°、60°和90°)空气-水气力提升泵的流动特性进行了三维数值模拟研究,研究成果表明:①相同进气量下,垂直管提升液体流量与效率最大,下弯管次之,上弯管最小;当进气量等于35 m^(3)/h时,垂直管的提升效率为22.34%,下弯管的提升效率为20.99%,上弯管的提升效率为17.63%;②相同弯曲角度下,提升效率随进气量的增加而降低;不同弯曲角度下,提升液体流量与提升效率均随弯管角度的增大而降低;当进气量等于35 m^(3)/h时,90°下弯管的提升效率为20.99%,60°下弯管的提升效率为21.75%,30°下弯管的提升效率为22.16%;③提升效率最优弯管为30°下弯管,在实际工程中应尽量避免将弯曲管道布置在进气口之上并避免弯曲角度过大的情况。Pneumatic lifting pump is a machine that transports fluid or pressurizes fluid by injecting compressed air.Compared with traditional mechanical pumps,this pump has significant advantages such as less environmental pollution,suitable for irregular wells,and high safety.It is widely used in oil field exploitation,sewage treatment,river dredging and dredging and so on.In this paper,based on Fluent simulation software,Euler multiphase flow model and Standard k-ωturbulence model are used to study the flow characteristics of s-bend pipe type(two bending positions:upper bending pipe and lower bending pipe;three bending angles:30°,60°and 90°)air-water pneumatic lifting pump.The three-dimensional numerical simulation results show that:①Under the same intake air volume,the vertical pipe lifting liquid flow and efficiency are of the largest,followed by the lower elbow,and the lowest for upper elbow.When the air intake equals to 35 m^(3)/h,the lifting efficiency of the vertical pipe is 22.34%,the lifting efficiency of the lower elbow is 20.99%,and the lifting efficiency of the upper elbow is 17.63%.②Under the same bending angle,the lifting efficiency decreases with the increase of air intake.At different bending angles,the liquid flow rate and lifting efficiency decrease with the increase of the bending angle.When the air intake equals to 35 m^(3)/h,the lifting efficiency of the 90°lower elbow is 20.99%,the lifting efficiency of the 60°lower elbow is 21.75%,and the lifting efficiency of the 30°lower elbow is 22.16%.③The 30°lower bending pipe has the optimal lifting efficiency.In practical engineering,it is advisable to avoid arranging the curved pipes above the inlet and avoid with excessive bending of the curved pipe.

关 键 词：气力提升泵 气液两相流 s型弯管 三维数值模拟 

分 类 号：TK72[动力工程及工程热物理—流体机械及工程]