September 5, 2025Physics of Fluids

Three-dimensional computational fluid dynamics analysis of the interaction mechanism of pump-turbines sharing one hydraulic system during successive load rejection transients

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The analysis reveals critical interactions of pump-turbines that exacerbate pressure instability during load rejection transients.
Key findings show that both pump-turbines can experience dangerously low draft-tube pressures, driven by negative water hammer effects.
Analysis employs a three-dimensional computational fluid dynamics method, successfully simulating successive load rejection scenarios in high-head systems.
The findings support improved operational safety strategies for pumped-storage hydropower stations encountering load rejection situations.

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Implication

This analysis demonstrates interaction mechanisms of pump-turbines and hydraulic systems during load rejection transients, highlighting safety risks in pumped-storage hydropower.

Cite This Study

Liu et al. (2025) studied this question.

synapsesocial.com/papers/68c2384fb210217d647774c6 https://doi.org/10.1063/5.0283729

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Implication

This analysis demonstrates interaction mechanisms of pump-turbines and hydraulic systems during load rejection transients, highlighting safety risks in pumped-storage hydropower.

Three-dimensional computational fluid dynamics analysis of the interaction mechanism of pump-turbines sharing one hydraulic system during successive load rejection transients

Key Points

Discussion

Implication

Cite This Study

Three-dimensional computational fluid dynamics analysis of the interaction mechanism of pump-turbines sharing one hydraulic system during successive load rejection transients

Key Points

Discussion

Implication

Cite This Study

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