Mechanism of energy dissipation in cavitation vortices of low head axial flow pump-as-turbine via reduced-order variational mode decomposition

Mechanism of energy dissipation in cavitation vortices of low head axial flow pump-as-turbine via reduced-order variational mode decomposition

When the low head pump-as-turbine (PAT) mode, the nonlinear coupling of vortex systems (namely draft-tube and blade–passage vortices) and the intensification of cavitation degrade both efficiency and operational stability. Existing signal–decomposition techniques (e.g. EMD, EWT) struggle to disentan...

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Bibliographic Details
Main Authors: Jiantao Shen, Li Cheng, Weixuan Jiao, Haotian Fan, Bowen Zhang, Giorgio Pavesi
Format: Article
Language:English
Published: Taylor & Francis Group 2025-12-01
Series:Engineering Applications of Computational Fluid Mechanics
Subjects:
PAT
Vortex dynamics
Energy dissipation
Low head conditions
Reduced-order variational mode decomposition
Online Access:https://www.tandfonline.com/doi/10.1080/19942060.2025.2547254
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https://www.tandfonline.com/doi/10.1080/19942060.2025.2547254

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