Weak compressibility effects on the pressure fluctuation at RSI in a highspeed centrifugal pump

Wang, Shaolong; Chen, Xiaoping; Li, Xiaojun; Cui, Baoling; Zhu, Zuchao

doi:10.1007/s12206-022-0918-8

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…The findings from the compressible flow simulation revealed that the average pressure pulsation and amplitude exhibited an increment of 0.5-3% in comparison to those of the incompressible flow case, thus approaching values that closely aligned with the experimental observations. Wang et al [8] conducted a comprehensive comparative examination, employing large eddy simulation (LES) to assess the calculation outcomes of pressure pulsations within the dynamic and static interference region of a centrifugal pump for both compressible and incompressible flow conditions. The obtained results demonstrated that the inclusion of compressibility yielded performance curves, pulse amplitudes, and trends of the monitoring points that were similar to the experimental values, particularly when lower flow rates were used.…”

Section: Introductionmentioning

confidence: 99%

The Suppression of Hump Instability inside a Pump Turbine in Pump Mode Using Water Injection Control

et al. 2023

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The occurrence of hump instability in pump mode within a pump turbine poses a significant challenge to the safe and stable operation of Pumped Storage Power Plants (PSPP). To achieve more precise numerical simulations, this paper establishes a weakly compressible model of water based on the Tait equation. Using this model, it is discovered that the onset of hump instability is closely linked to an increase in hydraulic losses induced by stalled rotation within the diffuser. Then, a flow control approach employing water injection into the guide vanes of a pump turbine is proposed in order to suppress flow instabilities and optimize the hump region. The findings reveal that the water injection approach can mitigate hydraulic losses, suppress unstable structures, and diminish the pulsation amplitude within the diffuser, ultimately delaying the emergence of the hump region to lower flow mass conditions. This study is helpful in widening the range of the safe and stable operation of pump turbines in pump mode.

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Section: Introductionmentioning

confidence: 99%