Influence of Geometric Parameters of Tiny Blades on the Shroud of a Centrifugal Pump on the Cavitation Suppression Effect

doi:10.3389/fenrg.2022.865885

	Influence of Geometric Parameters of Tiny Blades on the Shroud of a Centrifugal Pump on the Cavitation Suppression Effect
	Zhao, Weiguo 1,2; Zhou, Zhongliang 1
刊名	Frontiers in Energy Research
	2022-04-08
卷号	10
关键词	Cavitation Centrifugal pumps Kinetic energy Kinetics Numerical models Turbulence models Cavitation performance Cavitation suppression Geometric parameter Low specific-speed Numerical simulation Radial position Suppression effects The shroud of the impell Tiny blade Turbulent kinetic energy
DOI	10.3389/fenrg.2022.865885
英文摘要	In this paper, the effect of adding non-connected forms of tiny blades with different parameters of radial position, width, and length to the shroud of the impeller on the cavitation performance of a centrifugal pump is researched. A modified SST k-ω turbulence model combined with the Zwart–Gerber–Belamri cavitation model is used for numerical simulation of the model pump. The results show that the numerical prediction of the original pump agrees well with the experimental results. Adding tiny blades with different radial positions, widths, and lengths has a small effect on the pump head and efficiency under each working condition. Adding tiny blades near the impeller inlet has better suppression of cavitation in the initial stage, and adding tiny blades in the middle and backward positions has a better suppression effect on all stages of cavitation. There is an optimal tiny blade width to make the cavitation suppression effect optimal, and the optimal width of the model in this study is 3/4 of that of the main blade. The effect of a tiny blade length on cavitation performance is small. The existence of tiny blades slightly increases the turbulent kinetic energy in the low-turbulent kinetic energy region near the impeller inlet, significantly reduces the turbulent kinetic energy in the high-turbulent kinetic energy region near the outlet, and reduces the overall pressure pulsation main frequency amplitude during pump operation, making its operation more stable. Copyright © 2022 Zhao and Zhou.
语种	英语
出版者	Frontiers Media S.A.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158416]
专题	能源与动力工程学院
作者单位	1.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, China; 2.Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Zhao, Weiguo,Zhou, Zhongliang. Influence of Geometric Parameters of Tiny Blades on the Shroud of a Centrifugal Pump on the Cavitation Suppression Effect[J]. Frontiers in Energy Research,2022,10.
APA	Zhao, Weiguo,&Zhou, Zhongliang.(2022).Influence of Geometric Parameters of Tiny Blades on the Shroud of a Centrifugal Pump on the Cavitation Suppression Effect.Frontiers in Energy Research,10.
MLA	Zhao, Weiguo,et al."Influence of Geometric Parameters of Tiny Blades on the Shroud of a Centrifugal Pump on the Cavitation Suppression Effect".Frontiers in Energy Research 10(2022).