Impact characteristics and erosion mechanism of solid particles in a centrifugal pump

Frontiers in Energy Research

Energy Research

Pu Wu¹  Mingjiang Liu¹  Leilei Ji¹  Yi Yang¹  Shuo Li¹  Handong Qi¹  Wei Li² 

[1] National Research Center of Pumps, Jiangsu University, Zhenjiang, China;National Research Center of Pumps, Jiangsu University, Zhenjiang, China;Institute of Fluid Engineering Equipment Technology, Jiangsu University, Zhenjiang, China;

关键词: centrifugal pump;    solid particles;    impact characteristics;    erosion mechanism;    impact stress;   

DOI  :  10.3389/fenrg.2023.1206309

 received in 2023-04-15, accepted in 2023-07-31,  发布年份 2023

来源: Frontiers

【 摘 要 】

To study the impact and erosion mechanism of solid particles in centrifugal pumps, the standard k–ε turbulence model and SIMPLE algorithm are adopted in this paper. Based on the discrete phase model (DPM) of the Lagrange method and McLaury erosion model, the flow impact characteristics and erosion mechanism of solid particles impacting the surface of flow passage components in a single-stage centrifugal pump were numerically simulated, and the test data were compared with the numerical simulation results of the external characteristics of the pump in clean water. The results show that the erosion mechanism of the pressure surface of the blade is mostly the impact erosion caused by high-speed particles with large impact angles, and the impact angle and impact velocity are larger near the tail of the pressure surface. The impact angle of solid particles on the shroud and hub is relatively small, but the erosion mechanism is still impact erosion. The erosion mechanism of the volute wall is mostly the cutting friction erosion caused by the low-velocity particles with small impact angles, and it is only impacted by the particles with large angles near the volute tongue, which is impact erosion. Overall, the average impact angle and impact velocity of the particles on the pressure surface of the blade are higher than those on the volute, so the erosion of the pressure surface is more serious than that of the volute in theory. The research results have certain theoretical reference value for improving the wear resistance of a centrifugal pump.

【 授权许可】

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Copyright © 2023 Li, Yang, Wu, Ji, Liu, Qi and Li.