Numerical Simulation of Slotted Blade in Centrifugal Pump on Cavitation Suppression

doi:10.6041/j.issn.1000-1298.2018.12.019

	Numerical Simulation of Slotted Blade in Centrifugal Pump on Cavitation Suppression
	Zhao, Weiguo 1,2; Zhai, Lijing 1; Xia, Tian 1; Li, Shangsheng 1
刊名	Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery
	2018-12-25
卷号	49 期号:12 页码:150-157
关键词	Cavitation Centrifugal pumps Channel flow Computer simulation Efficiency Impellers Numerical models Cavitation model Cavitation performance Centrifugal pump impellers Dynamics modeling Flow charac-teristics Flow field structure Slotted blade Specific rotations
ISSN号	10001298
DOI	10.6041/j.issn.1000-1298.2018.12.019
英文摘要	Centrifugal pumps are widely used to deliver liquid media in agriculture, pharmacy, industry, etc. Compared with the case delivering pure liquid such as water, centrifugal pumps not only have lower efficiency but also are subject to severe vibration, noise and erosion when delivering cavity two-phase flow. In order to further improve the cavitation performance of low specific rotation centrifugal pump, a method of making the blade slotted to control cavitation in a centrifugal pump was proposed. The slotted impeller blade near the inlet of centrifugal pump was studied. According to the flow characteristics of cavitation in centrifugal pump and the cavitation dynamics model of Kubota cavitation model, the SST k-ω model was used to simulate and analyze the two-phase flow in a centrifugal pump under the same working conditions. The simulation results showed that after the blade surface was slotted, the head of the centrifugal pump was increased, and the head of the centrifugal pump was increased by 12.8% at the design point, and the efficiency was increased by 4.2%. The slotted blade can effectively prevent the low pressure region from expanding outward, change the pressure distribution and inhibit the cavitation in every stage of the centrifugal pump. The slotted blade can optimize the flow field structure, increase the pressure in the flow channel and reduce the volume fraction of the cavitation. The cavitation volume of centrifugal pump impeller in every stage of cavitation was smaller than that of impeller without slot when the blade was slotted. In the stage of cavitation development, the volume of slotted space-time bubble continued to decay. © 2018, Chinese Society of Agricultural Machinery. All right reserved.
语种	中文
出版者	Chinese Society of Agricultural Machinery
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114219]
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; 730050, China; 2.Key Laboratory of Fluid Machinery and System, Lanzhou; Gansu Province; 730050, China
推荐引用方式 GB/T 7714	Zhao, Weiguo,Zhai, Lijing,Xia, Tian,et al. Numerical Simulation of Slotted Blade in Centrifugal Pump on Cavitation Suppression[J]. Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery,2018,49(12):150-157.
APA	Zhao, Weiguo,Zhai, Lijing,Xia, Tian,&Li, Shangsheng.(2018).Numerical Simulation of Slotted Blade in Centrifugal Pump on Cavitation Suppression.Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery,49(12),150-157.
MLA	Zhao, Weiguo,et al."Numerical Simulation of Slotted Blade in Centrifugal Pump on Cavitation Suppression".Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 49.12(2018):150-157.