Multi-condition hydraulic performance enhancement for a mixed flow pump through improved AIGV

Yunhao Zheng, Yanjun Li, Fan Zhang, Shouqi Yuan and Xingye Zhu

Energy, 2025, vol. 326, issue C

Abstract: As vapor is transported with the mainstream and undergoes intense flow interaction, irreversible energy dissipation occurs according to the cascade principle of energy transmission, particularly under overload flow conditions where the cavitation development rate is rapid. To address this issue, fully adjustable (FA) and half-adjustable (HA) advanced inlet guide vanes (AIGV) are designed to improve hydraulic performance under multiple operating conditions. Entropy production theory and cavitation flow identification methods were combined to compare their suppression mechanism against hydraulic dissipation. The primary findings are as follows: 1) The AIGV effectively improves the efficiency of the mixed flow pump within overload flow rates and enhances its cavitation resistance. Compared with FA-AIGV, the novel HA-AIGV demonstrates a more significant improvement in comprehensive hydraulic performance. 2) AIGV creates a positive incidence angle at the impeller inflow, which delays the initial cavitation inception and suppresses both streamwise and spanwise vapor propagation. Consequently, energy dissipation caused by momentum vapor-liquid exchange is reduced.

Keywords: Mixed flow pump; Entropy production dissipation; Advanced inlet guide vane; Cavitation (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:326:y:2025:i:c:s0360544225019619

DOI: 10.1016/j.energy.2025.136319

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