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Instability analysis under part-load conditions in centrifugal pump
Ye WX; Huang RF(黄仁芳); Jiang ZW; Li XJ; Zhu ZC; Luo XW
AbstractIn this study, a centrifugal pump with a specific speed of 39.12 mxmin(-1)xm(3)s(-1) is treated to analyze the flow instability under part-load conditions by numerical simulation and experimental test. For calculations, the RANS method, coupled with the k- SST turbulence model, is adopted. Numerical results at different operation points are compared with available experimental data, such as hydraulic performance and flow field information by particle image velocimetry. The numerical and experiment results agree well. The flow simulation indicates a strong reverse flow at the passage upstream impeller inlet, and the energy loss in the impeller is the largest under part-load conditions among all flow components in the pump. In one impeller revolution, one blade-to-blade flow passage is always nearly blocked off by the rotating stall occurring at the impeller inlet for each instant, and the blockage induces a jet flow with large velocity at the next blade-to-blade flow passage along the rotational direction of the impeller. The blockage and the jet flow in the blade-to-blade flow passages will make the flow unstable inside the impeller and cause performance breakdown and pressure vibration under part-load conditions for the pump.
KeywordCentrifugal pump Flow instability Part-load conditions Rotating stall
Indexed BySCI ; EI
WOS IDWOS:000455641100026
WOS Research AreaEngineering, Mechanical
WOS SubjectEngineering
Funding OrganizationNational Natural Science Foundation of China [51536008] ; National Key R&D Program of China [2018YFB0606101] ; Beijing Natural Science Foundation [3182014] ; Science and Technology on Water Jet Propulsion Laboratory [61422230103162223004] ; State Key Laboratory for Hydroscience and Engineering [sklhse-2017-E-02]
ContributorLuo, XW
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Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.{Ye, Weixiang、Luo, Xianwu} Tsinghua Univ, Dept Energy & Power Engn, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China
2.{Huang, Renfang} Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
3.{Jiang, Zhiwu、Li, Xiaojun、Zhu, Zuchao} Zhejiang Sci Tech Univ, Key Lab Fluid Transmiss Technol Zhejiang Prov, Hangzhou 310018, Zhejiang, Peoples R China
Recommended Citation
GB/T 7714
Ye WX,Huang RF,Jiang ZW,et al. Instability analysis under part-load conditions in centrifugal pump[J]. JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY,2019,33(1):269-278.
APA Ye WX,黄仁芳,Jiang ZW,Li XJ,Zhu ZC,&Luo XW.(2019).Instability analysis under part-load conditions in centrifugal pump.JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY,33(1),269-278.
MLA Ye WX,et al."Instability analysis under part-load conditions in centrifugal pump".JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 33.1(2019):269-278.
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