导叶出口边位置对深井离心泵性能的影响  

Influence of outlet edge position of diffuser vane on performance of deep-well centrifugal pump

作　　者：周岭[1] 杨阳[1] 施卫东[1] 陆伟刚[1] 叶道星[2] 

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]西华大学流体及动力机械教育部重点实验室,四川成都610039

出　　处：《排灌机械工程学报》2016年第12期1028-1034,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51609106);江苏省自然科学基金资助项目(BK20150508);江苏高校自然科学研究项目(15KJB570001);江苏省博士后科研资助计划项目(1501069A);流体及动力机械教育部重点实验室开放基金资助项目(szjj2015-023)

摘　　要：选取100QJ30型混流式深井离心泵作为研究对象,借助数值模拟和性能试验的方法,研究导叶叶片出口边位置不同对深井离心泵性能的影响,并分析其内部流场的差异性和规律性.在导叶叶片主要几何参数不变的情况下,调整叶片出口边轴向位置,确定3种不同的导叶方案,其叶片出口边与导叶场域出口的轴向距离分别为6,3和1 mm.采用ANSYS CFX软件分别对3个方案进行数值模拟,以两级泵模型建立计算域,划分结构化网格,基于标准k-ω湍流模型和标准壁面函数进行多工况数值模拟,分别对3个方案进行了性能预测,并对预测结果进行了对比分析.结果表明:导叶叶片出口边延伸可抑制由于脱流而产生涡核的演化与成长,进而消除导叶流道内的旋涡,改善次级叶轮进口处液体的流场分布.较前2个方案,方案3中的导叶结构较大幅度提升了导叶的整流能力.In order to study the effect of the outlet edge position of the diffuser vane on the performance of deep-well centrifugal pump, by the numerical simulation and performance test, the 100QJ30 type deep-well centrifugal pump was taken as the experimental object. Under the condition that the main geo-metrical parameters of the diffuser vanes were not changed, three different diffusers were determined by adjusting the axial position of the blade outlet edge. The axial distance between the blade exit edge and the guide vane field exit was 6, 3 and 1 mm, respectively. The numerical simulation of three schemes were carried out by ANSYS CFX software, and the computational domain was established based on the two-stage pump model, and multi-condition numerical simulation was canied out by the standard k -ω turbulence model and standard wall function. The performance of the three schemes were predicted, and the prediction results were compared and analyzed. The results show that the extension of the diffuser exit side can suppress the evolution and growth of the vortex core due to the flow separation and eliminate the vortex in the guide vane flow channel, and improve the flow field distribution of the liquid at the in- let of the secondary impeller. Compared to the first two schemes, the guide vane structure of the third scheme has greatly improved the rectifying capacity of the guide vane.

关 键 词：井用潜水泵 数值模拟 试验研究 水力损失 

分 类 号：TH311[机械工程—机械制造及自动化]