JOURNAL ARTICLE

Energy performance evaluation of an axial-flow pump as turbine under conventional and reverse operating modes based on an energy loss intensity model.

  • Published In: Physics of Fluids, 2023, v. 35, n. 1. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Kan, Kan; Zhao, Feng; Xu, Hui; Feng, Jiangang; Chen, Huixiang; Liu, Weidong 3 of 3

Abstract

This article investigates the flow dynamics and energy loss characteristics of an axial-flow pump operated as a turbine (PAT) under both pump and turbine modes, using numerical simulation and entropy production theory. It proposes a spatial energy loss intensity model in a cylindrical coordinate system to quantitatively analyze the distribution and intensity of energy losses within the impeller and guide vane. The study finds that turbulent entropy production, mainly caused by unstable flow phenomena such as flow separation, vortex formation, and blade inlet impact, dominates energy dissipation in both modes, while direct and wall entropy productions are comparatively small. Differences in energy loss distribution between pump and turbine modes are linked to flow direction and operating conditions, with implications for optimizing axial-flow PAT design and operation in small-scale hydropower applications.

Additional Information

  • Source:Physics of Fluids. 2023/01, Vol. 35, Issue 1, p1
  • Document Type:Article
  • Subject Area:Power and Energy
  • Publication Date:2023
  • ISSN:1070-6631
  • DOI:10.1063/5.0132667
  • Accession Number:162236163
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