基于数值模拟与熵产理论的电潜泵内流特性  

Internal flow characteristics of electrical submersible pump based on numerical simulation and entropy production theory

作　　者：张绍广 杭建伟 施宇晖 杨阳 杜丹阳 宋相宇 周岭[2] ZHANG Shaoguang;HANG Jianwei;SHI Yuhui;YANG Yang;DU Danyang;SONG Xiangyu;ZHOU Ling(Tianjin Branch of CNOOC Co.,Ltd.,Tianjin 300452,China;National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China;College of Hydraulic Science and Engineering,Yangzhou University,Yangzhou,Jiangsu 225009,China;CNOOC EnerTech-Drilling&Production Co.,Ltd.,Tianjin,300452,China;Zhejiang Zhenxing Petrochemical Machinery Co.,Ltd.,Wenzhou,Zhejiang 325204,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [3]扬州大学水利科学与工程学院,江苏扬州225009 [4]中海油能源发展股份有限公司工程技术分公司,天津300452 [5]浙江振兴石化机械有限公司,浙江温州325204

出　　处：《排灌机械工程学报》2023年第8期771-778,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(52079058)。

摘　　要：为揭示电潜泵运行过程中的内流特性,采用数值模拟方法结合熵产理论研究了不同流量工况下电潜泵的能量特性与流动特征.对比分析了主要过流部件中体积平均熵产率、3种不同类型熵产及总熵产数量、涡核形态、壁面熵产分布随流量增大的变化规律与级间差异.结果表明:电潜泵在流量增大过程中,各级叶轮与导叶中的熵产存在先降后升的现象,其中导叶部分熵产最大.速度脉动熵产远高于壁面效应及时均过程引发的熵产,占据了总熵产的绝大部分,是导致能量损失的主要因素.在大流量工况下,随着级数的上升,过流部件的能量损失呈明显逐级上升的趋势.各级叶轮及导叶中,涡核数量及尺度随流量增大而先减后增,与熵产损失随流量上升的变化规律相吻合.基于熵产的量纲为一的湍流耗散系数,能够直观地确定过流部件中产生回流的位置.研究结果能够为电潜泵的节能优化设计提供一定的参考.In order to reveal the internal flow characteristics of electrical submersible pumps during operation,the energy characteristics and flow features of electrical submersible pumps under different flow conditions were studied by using numerical simulation combined with the entropy production theory.Variation rules and interstage differences of volumeaveraged entropy production rate,three different types of entropy production and total entropy production,vortex core shape,as well as wall entropy production distribution in the main flow passage components with the growth of flow rate were compared and analyzed.The results show that the entropy production in the diffuser of the impeller at each stage decreases first and then increases with the growth of the flow rate,and the entropy production in the diffuser part is the largest.The entropy generation of velocity pulsation is much higher than the entropy production caused by the wall effect and time averaged process,which accounts for the vast majority of the total entropy production,playing an important role for energy loss.In the case of large flow rate condition,the energy loss of the flow passage components shows a clear trend of increasing in steps as the number of stages rises.The number and scale of vortex core in impellers and diffusers decrease and then increase with the growth of flow rate,which is consistent with the variation law of entropy production loss with the rise of flow rate.Based on the dimensionless turbulent dissipation coefficient of entropy production,the location of backflow in the flow-passage components can be determined intuitively.The results from this study can serve as a reference for the optimal design of electrical submersible pumps.

关 键 词：电潜泵 数值模拟 能量损失 熵产分析 

分 类 号：S277.9[农业科学—农业水土工程]