NDLI: Unsteady flow characteristic analysis of a centrifugal pump under over-load operating conditions

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Unsteady flow characteristic analysis of a centrifugal pump under over-load operating conditions

Content Provider	Scilit
Author	Zhao, Xiaoran Xiao, Yexiang Wang, Zhengwei Zhang, Jin
Copyright Year	2019
Description	Journal: Iop Conference Series: Earth and Environmental Science Unsteady flow phenomena, including flow separation, vortex flow, back flow and interaction between tip vortex and main flow, can occur in the centrifugal pump under over-load working conditions. Previous researches mainly focus on the flow characteristic under part-load working conditions, which is quite different from cases at over-load conditions. In this paper, flow characteristics are investigated in a centrifugal pump by CFD technology. The SST-CC turbulence model is adopted to perform steady simulations and the SAS-CC model is used in unsteady simulations of the centrifugal pump under $1.00Q_{BEP}$ - $1.45Q_{BEP}$ working conditions. Flow characteristic is proceeded with energy loss analysis by entropy method and pressure amplitude spectra. The results indicate that there appears a significant vortex core inside the impeller when the flow rate is larger than $1.28Q_{BEP}$ and the flow in the diffusing part and tongue region of the volute is complicated with several swirling vortices. The main frequency and amplitude are also investigated. There exists an evident low-frequency component near the volute tongue under over-load conditions, which is related to the vortices and flow separation inside the volute.
Related Links	https://iopscience.iop.org/article/10.1088/1755-1315/240/3/032002/pdf
ISSN	17551307
e-ISSN	17551315
DOI	10.1088/1755-1315/240/3/032002
Journal	Iop Conference Series: Earth and Environmental Science
Issue Number	3
Volume Number	240
Language	English
Publisher	IOP Publishing
Publisher Date	2019-03-27
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Earth and Environmental Science Aerospace Engineering
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy Environmental Science

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