September 10, 2025Physics of Fluids

Experimental investigation on characteristics of pressure fluctuation and vibration under hump instability of a pump-turbine

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Key findings indicate that pressure fluctuation is the primary driver of vibration excitement during hump instability in pump-turbines.
A threshold warning coefficient based on multifractal intensity provides a robust metric for identifying critical stall conditions.
Investigations reveal a transition from linear to nonlinear interactions as hump instability develops, impacting operational stability.
The relationship between cross correlation and coupling intensity changes significantly, highlighting complex multiscale dynamics in operation.

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Implication

Experimental investigation identifies critical thresholds for pressure fluctuation and vibration in pump-turbines, suggesting new optimization strategies.

Cite This Study

Zhao et al. (2025) studied this question.

synapsesocial.com/papers/68c2409bb210217d6479b5e3 https://doi.org/10.1063/5.0280179

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Implication

Experimental investigation identifies critical thresholds for pressure fluctuation and vibration in pump-turbines, suggesting new optimization strategies.

Experimental investigation on characteristics of pressure fluctuation and vibration under hump instability of a pump-turbine

Key Points

Discussion

Implication

Cite This Study

Experimental investigation on characteristics of pressure fluctuation and vibration under hump instability of a pump-turbine

Key Points

Discussion

Implication

Cite This Study

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