修锉叶片出口形状对固液两相流离心泵性能的影响  

Influence of Modified Blade Outlet Shape on the Performance of Solid-Liquid Two-Phase Flow Centrifugal Pump

作　　者：徐明建 尚勇 符杰 李福鑫 XU Mingjian;SHANG Yong;FU Jie;LI Fuxin(Sichuan Zigong Industrial Pump Co.,Ltd.,Zigong 643000,Sichuan,China;School of Energy and Power Engineering,Xihua University,Chengdu 610039,China;Development and Reform Bureau of Guang'an District,Guangan 638500,Sichuan,China)

机构地区：[1]四川省自贡工业泵有限责任公司,四川自贡643000 [2]西华大学能源与动力工程学院,成都610039 [3]广安市广安区发展和改革局,四川广安638500

出　　处：《能源研究与管理》2024年第4期140-149,共10页Energy Research and Management

基　　金：水利部数字孪生流域重点实验室开放基金(Z0202042022)。

摘　　要：为探究修锉叶片出口对固液两相流泵性能的影响,对比转速为180的离心泵叶片出口分别进行了4种不同形式的修锉,在ANSYS-CFX软件中采用标准k-ε湍流模型进行非定常数值模拟,对比分析各修锉方案对该泵外特性,不同颗粒浓度和颗粒直径对泵的内流场、湍动能以及固相颗粒分布的影响。研究结果表明:固液两相条件与清水条件下的外特性相似,在设计工况下效率最大相差0.59%;但修锉叶片出口工作面(YL2)能够提高泵的水力效率,修锉叶片出口背面(YL3)能够增加泵的扬程。固液两相条件下,湍动能强度会随着颗粒浓度的增大而增大,同一颗粒浓度下湍动能强度随着颗粒直径的增大而减小;方案YL3、YL4能改善前盖板与叶片背面的固相颗粒分布,达到降低磨损的效果。采用方案YL3可设计出性能最优的固液两相流离心泵。To investigate the impact of modified blade exits on the performance of solid-liquid two-phase flow pumps, acomparison was made with four different modification forms at a pump speed of 180 RPM using a centrifugal pump.Unsteady numerical simulations were conducted in ANSYS-CFX with the standard - turbulence model. The analysiscompared the external characteristics of the pump under different modification schemes and examined the effects of varyingparticle concentrations and diameters on the internal flow field, turbulent kinetic energy, and solid particle distribution. Thestudy results indicate that the external characteristics under solid-liquid two-phase conditions are similar to those under clearwater conditions, with a maximum efficiency difference of only 0.59% at the design operating point. However, the modifiedblade exit surface (YL2) improves the pump's hydraulic efficiency, while the modified blade exit back surface (YL3)increases the pump's head. Under solid-liquid two-phase conditions, the intensity of turbulent kinetic energy increases withhigher particle concentrations, while at the same concentration, it decreases with larger particle diameters. Modification schemes YL3 and YL4 enhance the solid particle distribution between the front cover and the blade back, resulting in reducedwear. The YL3 scheme can be employed to design a solid-liquid two-phase flow centrifugal pump with optimal performance.

关 键 词：离心泵 修锉叶片出口 湍动能分布 固相颗粒分布 

分 类 号：TK05[动力工程及工程热物理] TH311[机械工程—机械制造及自动化]