Influences of the diameter of the balance hole on the flow characteristics in the hub cavity of the centrifugal pump

doi:10.1007/s42241-019-0033-1

	Influences of the diameter of the balance hole on the flow characteristics in the hub cavity of the centrifugal pump
	Dong, Wei 2; Chu, Wu-li 1; Liu, Zai-lun 3
刊名	JOURNAL OF HYDRODYNAMICS
	2019-10
卷号	31 期号:5 页码:1060-1068
关键词	Centrifugal pump balance hole hub cavity circumferential velocity component radial velocity component
ISSN号	1001-6058
DOI	10.1007/s42241-019-0033-1
英文摘要	The diameter of the impeller balance hole in a centrifugal pump is closely related to axial force. Thus, to select the appropriate diameter of a balance hole is crucial for balancing the axial force of the centrifugal pump. After the validation of the CFD method and the grids independence study, the characteristics of flow in the hub cavity have been analyzed in 4 cases with different diameters of balance holes. The leakage rate of the liquid in the hub cavity of the centrifugal pump is calculated and compared with the test result. According to the research, when no balance hole exists, the distribution of liquid velocity in the core area of the hub cavity exhibits axial symmetry, and the circumferential velocity component is approximately 0.4 times of the impeller's rotational speed. When the balance hole exists, the distribution of liquid velocity in the hub cavity does not exhibit axial symmetry, and the circumferential velocity component is larger than 0.4 times of the impeller's rotational speed. The radial leakage velocity on the turbulent boundary layer of the pump cover will increase with the increasing diameter of the balance hole.
资助项目	Basic Natural Science Research Program of Shaanxi Province[2019JLM-58]
WOS研究方向	Mechanics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000488930600020
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31549]
专题	能源与动力工程学院
通讯作者	Dong, Wei
作者单位	1.Northwestern Polytech Univ, Sch Power & Energy, Xian 710129, Shaanxi, Peoples R China 2.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China 3.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Dong, Wei,Chu, Wu-li,Liu, Zai-lun. Influences of the diameter of the balance hole on the flow characteristics in the hub cavity of the centrifugal pump[J]. JOURNAL OF HYDRODYNAMICS,2019,31(5):1060-1068.
APA	Dong, Wei,Chu, Wu-li,&Liu, Zai-lun.(2019).Influences of the diameter of the balance hole on the flow characteristics in the hub cavity of the centrifugal pump.JOURNAL OF HYDRODYNAMICS,31(5),1060-1068.
MLA	Dong, Wei,et al."Influences of the diameter of the balance hole on the flow characteristics in the hub cavity of the centrifugal pump".JOURNAL OF HYDRODYNAMICS 31.5(2019):1060-1068.