Numerical study on pressure fluctuation of a multistage centrifugal pump based on whole flow field
Source abstract
Abstract
Multistage centrifugal pumps can provide high-pressure fluid flow, and is widely used in various engineering applications. However, the pressure fluctuation in the pumps strongly affects the flow and pressure stability. To gain further insight into the pressure fluctuation of multistage centrifugal pumps, a numerical model of a typical multistage centrifugal pump model was constructed and the flow investigated systematically under different operating conditions. Changes in amplitude, frequency, and phase of pressure fluctuation in the impellers, diffusers, and pump cavities were observed and analyzed in both time-domain and frequency-domain. The pressure fluctuations of the fluid in the impeller were found to originate from the inlet side of the outward diffuser, whereas that in the diffuser arose from the outlet side of the impeller blade. In contrast, the pressure fluctuations in the pump cavity were initiated from the outlet side of the impeller blade and the interstage leakage of fluid. This study also conclude that the pressure fluctuations are essentially a wave with identifiable amplitude, frequency, and phase.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Cavitation Phenomena in Pumps · Hydraulic and Pneumatic Systems · Vibration and Dynamic Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Hydraulic, Energy and Power Engineering, Yangzhou University 1 , Yangzhou, Jiangsu Province 225002, China
School of Electric Power, North China University of Water Resources and Electric Power 2 , Zhengzhou, Henan Province 450045, China
School of Mechanical Engineering, Nantong University 3 , Nantong, Jiangsu Province 226019, China
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University 4 , Zhenjiang, Jiangsu Province 212013, China
Funding
National Natural Science Foundation of China · China Postdoctoral Science Foundation
References (29)
Show source-provided references
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