Numerical simulation of transient flow field in a mixed-flow pump during starting period

Purpose This paper aims to study the transient flow characteristics in a mixed-flow pump during the start-up period. Design/methodology/approach In this study, numerical calculation of the internal flow field in a mixed-flow pump using the sliding mesh method was carried out. The regulation of the p...

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Veröffentlicht in:International journal of numerical methods for heat & fluid flow 2018-04, Vol.28 (4), p.927-942
Hauptverfasser: Li, Wei, Zhang, Yang, Shi, Weidong, Ji, Leilei, Yang, Yongfei, Ping, Yuanfeng
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Sprache:eng
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Zusammenfassung:Purpose This paper aims to study the transient flow characteristics in a mixed-flow pump during the start-up period. Design/methodology/approach In this study, numerical calculation of the internal flow field in a mixed-flow pump using the sliding mesh method was carried out. The regulation of the pressure, streamline and the relative speed during the start-up period was analyzed. Findings The trend of the simulated head is consistent with the experimental results, and the calculated head is around 0.3 m higher than the experimental head when the rotation speed reached the stable stage, indicating that the numerical method for the start-up process simulation of the mixed-flow pump has a high accuracy. At the beginning, the velocity inside the impeller changes little along the radius direction and the flow rate increases slowly during the start-up process. As the rotation speed reached the stable stage, the flow inside the impeller became steady, the vortex reduced and transient effects disappeared gradually. Originality/value The study results have significant value for revealing the internal unsteady flow characteristics of the mixed-flow pump and providing the reference for the design optimization of the mixed-flow pump.
ISSN:0961-5539
1758-6585
DOI:10.1108/HFF-06-2017-0220