摘要
对离心泵而言,叶片出口角β2是影响泵性能的一个重要参数。基于Fluent离心泵全流场数值模拟,对某型号低比转数离心泵进行了大出口角叶形的改形设计,研究了不同大出口角对离心泵水力性能的影响,并对比分析了原模型泵与S形叶片离心泵水力特性及流动特性。结果表明:离心泵扬程随着出口角的增大而增大,在出口角为90°时达到最大值。当出口角为90°时,S形叶片的水力性能最佳,在设计工况下及大流量工况泵扬程显著提升且效率有小幅度提升,但小流量工况下泵效率略有下降。S形叶片可以有效抑制离心泵叶轮内的边界层分离现象,且随着流量的增大抑制效果越明显。
For centrifugal pumps,vane outlet angleβ2 is an important parameter that affects pump performance.In this paper,based on the numerical simulation of the full flow field of the Fluent centrifugal pump,a retrofit design of a large outlet angle blade is carried out for a certain type of low specific speed centrifugal pump,the influence of different large outlet angles on the hydraulic performance of the centrifugal pump is studied,and the comparative analysis The hydraulic characteristics and flow characteristics of the original model pump and S-blade centrifugal pump.The analysis shows that the head of the centrifugal pump increases with the increase of the outlet angle,and reaches the maximum value when the outlet angle is 90°.When the outlet angle is 90°,the hydraulic performance of the S-blade is the best.Under the design condition and the large flow condition,the pump head is significantly improved and the efficiency is slightly improved,but the pump efficiency is slightly reduced under the small flow condition.The S-blade can effectively inhibit the boundary layer separation phenomenon in the impeller of the centrifugal pump,and the inhibition effect is more obvious with the increase of the flow rate.
作者
赵伟国
寇相儒
张翠莲
罗云霞
周忠亮
ZHAO Wei-guo;KOU Xiang-ru;ZHANG Cui-lian;LUO Yun-xia;ZHOU Zhong-liang(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Fluid Machinery and System,Gansu Province,Lanzhou 730050,China)
出处
《液压气动与密封》
2023年第6期55-58,62,共5页
Hydraulics Pneumatics & Seals
基金
国家自然科学基金(52169018)
甘肃省教育厅产业支撑计划项目(2021CYZC-27)。
关键词
离心泵
低比转速
S形叶片
叶片出口角
centrifugal pumps
low specific revolution
S-blade
vane outlet angle
