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 WG(赵伟国)1,2 ; Zhu CJ(朱昌健)1,2; Xu ZX(徐泽鑫)1,2; Xu Y(徐阳)3
	2021-01-15
发表期刊	Zhendong yu Chongji/Journal of Vibration and Shock
ISSN	10003835
卷号	40 期号:1 页码:119-126
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.
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
DOI	10.13465/j.cnki.jvs.2021.01.016
收录类别	EI
语种	中文
出版者	Chinese Vibration Engineering Society
EI入藏号	20210609894499
EI主题词	Cavitation
EI分类号	525.2 Energy Conservation - 618.2 Pumps - 631.1 Fluid Flow, General - 631.1.1 Liquid Dynamics - 921 Mathematics
来源库	Compendex
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/147152
专题	能源与动力工程学院
作者单位	1.兰州理工大学能源与动力工程学院; 2.甘肃省流体机械及系统重点实验室; 3.上海凯泉泵业(集团)有限公司
第一作者单位	能源与动力工程学院
第一作者的第一单位	能源与动力工程学院
推荐引用方式 GB/T 7714	Zhao WG,Zhu CJ,Xu ZX,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	赵伟国,朱昌健,徐泽鑫,&徐阳.(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	赵伟国,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.