Numerical simulation and tests for cavitation characteristics of centrifugal pump controlled by bypass device

doi:10.13465/j.cnki.jvs.2021.01.016

	Numerical simulation and tests for cavitation characteristics of centrifugal pump controlled by bypass device
	Zhao, Weiguo 2,3; Zhu, Changjian 2,3; Xu, Zexin 2,3; Xu, Yang 1
刊名	Zhendong yu Chongji/Journal of Vibration and Shock
	2021-01-15
卷号	40 期号:1 页码:119-126
关键词	Centrifugal pumps Energy efficiency Flow fields Kinetic energy Kinetics Numerical models Turbulence models Cavitation characteristics Development stages Flow field structure K-Omega turbulence model Low specific speed centrifugal pump Pressure fluctuation Small disturbances Turbulent kinetic energy
ISSN号	10003835
DOI	10.13465/j.cnki.jvs.2021.01.016
英文摘要	In order to study the influence law of bypass waterway on cavitation characteristics of centrifugal pump, a low specific speed centrifugal pump with a specific speed of 32 was taken as the study object, a bypass waterway was built from the eighth section of the volute near the inlet side to the suction section. The modified SST k-ω turbulence model and Kubota cavitation model were used to do the 3-D non-steady numerical simulation for the original type pump and the pump with the bypass waterway under different cavitation numbers. The simulation results were compared with test ones. Results showed that both head and efficiency of the low specific speed centrifugal pump decrease slightly after building the bypass waterway; under the designed working condition, test values of head and efficiency decrease by 2.30% and 3.07%, respectively and simulated values of head and efficiency decrease by 3.10% and 1.80%, respectively; in initial and development stage of cavitation, the bypass waterway can effectively increase near-wall turbulent kinetic energy, improve pressure distribution, restrain growth and fall off of cavitation and improve flow field structure; after head is broken, the bypass waterway can't effectively restrain cavitation, but aggravate its severity; the bypass waterway causes a small disturbance to the pressure fluctuation in flow field involved. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
语种	中文
出版者	Chinese Vibration Engineering Society
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147152]
专题	能源与动力工程学院
作者单位	1.Shanghai Kaiquan Pump Industry Group Co., Ltd., Shanghai; 201804, China 2.College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Gansu Provincial Key Lab of Fluid Machinery and System, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Zhao, Weiguo,Zhu, Changjian,Xu, Zexin,et al. Numerical simulation and tests for cavitation characteristics of centrifugal pump controlled by bypass device[J]. Zhendong yu Chongji/Journal of Vibration and Shock,2021,40(1):119-126.
APA	Zhao, Weiguo,Zhu, Changjian,Xu, Zexin,&Xu, Yang.(2021).Numerical simulation and tests for cavitation characteristics of centrifugal pump controlled by bypass device.Zhendong yu Chongji/Journal of Vibration and Shock,40(1),119-126.
MLA	Zhao, Weiguo,et al."Numerical simulation and tests for cavitation characteristics of centrifugal pump controlled by bypass device".Zhendong yu Chongji/Journal of Vibration and Shock 40.1(2021):119-126.