The Influence of Turbulence Model Selection and Leakage Considerations on CFD Simulation Results for a Centrifugal Pump

Liu, Han; Pan, Hua Chen

doi:10.4028/www.scientific.net/amr.594-597.1940

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…Commercial software, ANSYS CFX, was employed to perform the numerical simulation. The Shear Stress Transport (SST) k-w turbulence model combines the benefits of both the k-ε and k-ω models, making it well suited to a wide range of flow conditions, and it has been extensively validated and proven to perform well across the wide range of operating conditions in pump turbines [36][37][38]. Therefore, the SST k-w turbulence model was used for steady simulation, and Detached Eddy Simulation (DES) was used in the unsteady simulation.…”

Section: Numerical Settings and Boundary Conditionsmentioning

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: Numerical Settings and Boundary Conditionsmentioning

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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Investigations of Suction Recirculation in Primary Sodium Pump of Future Indian Fast Breeder Reactors

Rajendrakumar,

Natesan,

Devan

2023

Nuclear Science and Engineering

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Numerical investigation of the effect of leakage flow on cavitation in centrifugal pump

Moganaradjou

Phukan

Vengadesan

et al. 2021

J. Phys.: Conf. Ser.

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Numerical studies on pumps emphasize mainly on modelling the interactions between the impeller and the volute to obtain an accurate understanding of the physics involved. However, the importance of modelling leakage paths, which is known to have a significant influence on the flow structure in the pump, necessitates an in-depth analysis. This activity is undertaken in this paper by investigating a specific case of a centrifugal pump. Numerical studies have been conducted on the pump modelled with and without leakages for the design condition. The sliding mesh method is used to obtain single phase pressure pulsations data at some important locations in the volute and the leakage path, and transient Multiple Reference Frame (MRF) modelling is utilized to conduct the cavitation analysis. It is observed that for the case under study, the pressure pulsations pattern and the cavitation behaviour varies significantly due to the inclusion of leakage paths in the analysis.

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The Influence of Turbulence Model Selection and Leakage Considerations on CFD Simulation Results for a Centrifugal Pump

Cited by 4 publications

References 2 publications

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

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

Investigations of Suction Recirculation in Primary Sodium Pump of Future Indian Fast Breeder Reactors

Numerical investigation of the effect of leakage flow on cavitation in centrifugal pump

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