交错叶片对双吸离心泵性能影响的数值分析  

Numerical analysis of effects of staggered blades on characteristics of double-suction centrifugal pump

作　　者：刘建瑞[1] 付威[1] 高振军[1] 何小可[1] 陈斌[1] 汤富俊 

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

出　　处：《排灌机械工程学报》2015年第3期196-202,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金："十二五"国家科技支撑计划项目(2011BAF14B02)

摘　　要：为减小压力脉动对双吸离心泵性能的影响,设计常规双吸叶轮的ES350-585型双吸离心泵进行外特性试验和数值模拟,再将原双吸叶轮两侧叶片交错布置进行数值模拟,交错角度分别为0°,10°,20°,30°.采用Gridpro软件划分结构网格,应用ANSYS CFX软件对5种方案的双吸离心泵模型进行不同工况下三维非定常数值计算,得到泵内部流场静压分布和压力脉动特性.计算结果表明:采用两侧叶片交错布置的双吸叶轮可以有效降低离心泵内压力脉动;随着交错角度的增大,压力脉动幅值呈递减趋势;当交错角度为30°时,压水室内压力脉动幅值最小,此时压水室内静压分布最均匀.To reduce the pressure fluctuation amplitude in a double-suction centrifugal pump, the blades of both sides of the impeller are separated circumferentially with 0°, 10°, 20°, 30° staggered angles respectively in double-suction pump ES350 -585 with a usual double-suction impeller. A structured grid in the flow domains of five pumps with usual and staggered impellers is generated by using Gridpro; subsequently an unsteady, 3D fluid dynamics analysis is conducted in ANSYS CFX to obtain pump performance and unsteady static pressure profiles. It can be seen that the staggered blades can reduce pressure fluctuation in the pumps effectively. Moreover the pressure fluctuation amplitude decreases with the increasing staggered angle. Importantly, when the staggered is 30°, the pressure fluctuation amplitude in the volute reaches the minimum and the static pressure becomes the most uniform at the entrance to the volute.

关 键 词：双吸离心泵 交错叶片 压力脉动 数值模拟 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]