Numerical investigation of splitter blades on the performance of a forward-curved impeller used in a pump as turbine

Yu, He; Wang, Tao; Dong, Yuancheng; Gou, Qiuqin; Lei, Lei; Liu, Yunqi

doi:10.1016/j.oceaneng.2023.114721

Cited by 12 publications

(2 citation statements)

References 34 publications

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“…The performance of the PAT can be enhanced through various methods, including blade profile optimization [ 95 ], blade tip rounding [ 13 , 71 , 120 ], impeller diameter trimming [ 13 ], adjusting the number of blades [ 112 ], implementing splitter blades [ 39 , [121] , [122] , [123] ], blade grooving [ 102 ], and modifying blade thickness [ 80 ].…”

Section: Performance Improvementmentioning

confidence: 99%

The pump as a turbine: A review on performance prediction, performance improvement, and economic analysis

Nasir,

Dribssa,

Girma

2024

Heliyon

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Section: Performance Improvementmentioning

confidence: 99%

The pump as a turbine: A review on performance prediction, performance improvement, and economic analysis

Nasir,

Dribssa,

Girma

2024

Heliyon

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“…Compared with traditional turbine units, PATs have a simple structure, low cost, and easy maintenance, making them highly suitable for facilitating the sustainable use of water resources in remote rural regions [7,8]. However, the design and manufacture of axial-flow pumps usually only consider the performance under conventional pump conditions, rather than reverse operating conditions [9]. Additionally, considering the existence of an inlet elbow, transmission shaft, and other structural components, the inflow conditions during the reverse operation of axial-flow pumps are poor, resulting in reduced uniformity in fluid distribution within the impeller's front section.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Non-Uniform Inflow Effects on Impeller Forces in Axial-Flow Pumps Operating as Turbines

Kan,

Zhang,

et al. 2024

Water

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Due to the existence of an inlet elbow, transmission shaft, and other structural components, the inflow of axial-flow pumps as turbines (PATs) becomes non-uniform, resulting in the complexity of internal flow and adverse effects such as structural vibration. In this paper, numerical methods were employed to explore the non-uniform inflow effects on impeller forces and internal flow field characteristics within an axial-flow PAT. The study results indicated that non-uniform inflow caused uneven pressure distribution inside the impeller, which leads to an imbalance in radial forces and offsetting the center of radial forces. With an increasing flow rate, the asymmetry of radial forces as well as the amplitude of their fluctuations increased. Non-uniform inflow was found to induce unstable flow structures inside the impeller, leading to low-frequency, high-amplitude pressure fluctuations near the hub. Using the enstrophy transport equation, it was shown that the relative vortex generation term played a major part in the spatiotemporal evolution of vortices, with minimal viscous effects.

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Optimization of a radial inflow turbine rotor with splitter blades based on entropy production theory and artificial neural network

Wang,

Yang,

Xia

et al. 2024

Applied Thermal Engineering

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Numerical investigation of splitter blades on the performance of a forward-curved impeller used in a pump as turbine

Cited by 12 publications

References 34 publications

The pump as a turbine: A review on performance prediction, performance improvement, and economic analysis

The pump as a turbine: A review on performance prediction, performance improvement, and economic analysis

Investigation of Non-Uniform Inflow Effects on Impeller Forces in Axial-Flow Pumps Operating as Turbines

Optimization of a radial inflow turbine rotor with splitter blades based on entropy production theory and artificial neural network

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