1. Study on the influence of the specific area of balance hole on cavitation performance of high- speed centrifugal pump
- Author
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Zhengbai Chang, Yimeng Jiang, and Xiaorui Cheng
- Subjects
0209 industrial biotechnology ,geography ,geography.geographical_feature_category ,Materials science ,Rotor (electric) ,Mechanical Engineering ,Flow (psychology) ,02 engineering and technology ,Mechanics ,Inlet ,Centrifugal pump ,Vortex ,law.invention ,Impeller ,020303 mechanical engineering & transports ,020901 industrial engineering & automation ,0203 mechanical engineering ,Mechanics of Materials ,law ,Cavitation ,Head (vessel) - Abstract
In this paper, the influence of the specific area of balancing hole on the cavitation performance of high-speed centrifugal pump is studied by numerical method. The results show that in the initial cavitation stage, with the increase of the specific area, the head and efficiency of the pump decreases, and the shaft power increases in a small range. The specific area of the balance hole can change the magnitude and direction of the rotor axial force. With the increase of the specific area, the anti-cavitation performance of the pump is weakened, especially when the specific area reaches a certain value, the vortex flow appears in the balance hole, which causes serious distortion of the flow condition at the inlet of the centrifugal impeller. Meanwhile, cavitation also occurs in the balance chamber and is mainly concentrated near the hub of the centrifugal impeller.
- Published
- 2020