Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions

doi:10.3390/pr7110786

	Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions
	Guo, Rong1,2 ; Li, Rennian1,2 ; Zhang, Renhui1,2 ; Han, Wei1,2
	2019-11
发表期刊	PROCESSES
卷号	7 期号:11
摘要	To study the reasons for the low efficiency of jet centrifugal pumps (JCPs) and the mechanism of unsteady flow characteristics under multiple conditions, taking a JET750G1 JCP as the object, three-dimensional steady and unsteady numerical calculations of the model pump were carried out using the k-omega turbulence model. The transient fluctuation characteristics of the flow field in the major flow passage components and the spatial and temporal evolution laws of vortices in the rotor-stator cascades were analyzed. The accuracy of the numerical method was verified by experiments. The results show that there are various scales of flow distortion phenomena in the chamber of the JCP, such as eddies, blockage of the flow passage, recirculation, secondary flow, and circulation, which not only cause great hydraulic loss, but also destroy the flow stability, symmetry, and balance in the other flow passage components. This is an important reason for the obviously lower efficiency of a JCP compared to a general centrifugal pump. The spatial and temporal evolution laws of vortices in the rotor-stator cascades are mainly related to the relative positions of the impeller blades and guide vane blades. The formation mechanism of the unsteady flow field fluctuation characteristics of JCPs is mainly related to the number of blades in the rotor-stator cascades and the operation parameters of the pump. The fluctuation intensity of the flow field inside the impeller and guide vane is obviously greater than that in the other flow areas, reflecting that the rotor-stator interaction is the decisive factor affecting the unsteady flow characteristics of a JCP under multiple conditions.
关键词	jet centrifugal pump (JCP) unsteady flow numerical calculation pressure fluctuation rotor-stator interaction
DOI	10.3390/pr7110786
收录类别	SCI ; SCIE
语种	英语
资助项目	Natural Science Foundation of China[51579125] ; National Key Research and Development Program of China[2016YFB0200901]
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
WOS记录号	WOS:000502263700012
出版者	MDPI
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/64149
专题	能源与动力工程学院
通讯作者	Guo, Rong; Li, Rennian
作者单位	1.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China; 2.Key Lab Fluid Machinery & Syst, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	能源与动力工程学院
通讯作者单位	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	Guo, Rong,Li, Rennian,Zhang, Renhui,et al. Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions[J]. PROCESSES,2019,7(11).
APA	Guo, Rong,Li, Rennian,Zhang, Renhui,&Han, Wei.(2019).Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions.PROCESSES,7(11).
MLA	Guo, Rong,et al."Numerical Study of the Unsteady Flow Characteristics of a Jet Centrifugal Pump under Multiple Conditions".PROCESSES 7.11(2019).