Study of cavitation performance of centrifugal pump based on Venturi tube principle blades

被引：0
作者：
Zhao W. [1 ,2 ]
Lu J. [1 ,2 ]
Zhao F. [1 ,2 ]
Li Q. [1 ,2 ]
机构：
[1] College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou
[2] Key Laboratory of Fluid Machinery and System of Gansu Province, Lanzhou
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 05期
基金：
国家重点研发计划;
关键词：
Cavitation suppression; Centrifugal pump; Numerical simulation; Venturi;
D O I：
10.11817/j.issn.1672-7207.2021.05.030
中图分类号：
学科分类号：
摘要：
In order to improve the cavitation performance of low specific speed centrifugal pumps, the blade which can restrain the cavitation development process in centrifugal pumps was designed according to the principle of Venturi tube, and the influence of throat geometric parameters of Venturi tube on the cavitation development in centrifugal pumps was investigated. The modified shear stress transport k-ω turbulence model combined with Kubota cavitation model was employed to simulate flow in the pump, and the reliability of numerical simulation was verified by experimental method. The results show that in the weak cavitation stage, when the throat width is 0.3 times and 0.5 times of the axial width of the blade, the suppress effect on the cavitation in the impeller is the most obvious, and the cavitation volume fraction can be reduced by 60.1%. However, in the severe cavitation stage, the suppress effect is the most obvious when the throat width is equal to the axial width, and the cavitation volume fraction can be reduced by 59.7%. © 2021, Central South University Press. All right reserved.
引用
收藏
页码：1692 / 1701
页数：9
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