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CFD-Based Investigation of the Operation Process of Radial Labyrinth Machinery Under Different Geometrical Configurations

Author

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  • Przemyslaw Szulc

    (Faculty of Mechanical and Power Engineering, Department of Energy Conversion Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

  • Janusz Skrzypacz

    (Faculty of Mechanical and Power Engineering, Department of Energy Conversion Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland)

Abstract

This study explores the performance and flow characteristics of radial labyrinth pumps (RLPs) under various geometrical configurations and operating conditions. Experimental investigations and numerical simulations were conducted to evaluate the impact of design parameters such as blade geometry, channel width and blade angle on pump hydraulic performance. The numerical model, developed using the realizable k-ε turbulence model, was validated with experimental data, achieving satisfactory convergence (4.8%—bladed active disc operating with a smooth passive disc and 3.0%—bladed active disc operating with a bladed passive disc). Analysis of the velocity profiles and vortex structures formed between the active and passive discs was performed. These findings underscore the importance of optimizing disc geometry to balance centrifugal effects and momentum exchange. The obtained head for the model with a bladed active disc operating with a smooth passive disc was H = 24.1 m, while, for the bladed active disc operating with a bladed passive disc, it was almost 1.7 times higher at H = 40.3 m. Additionally, the research identifies potential zones within the pump where energy transfer processes differ, providing insight into targeted design improvements. The findings provide valuable information on the optimization of RLP designs and their broader applicability.

Suggested Citation

  • Przemyslaw Szulc & Janusz Skrzypacz, 2024. "CFD-Based Investigation of the Operation Process of Radial Labyrinth Machinery Under Different Geometrical Configurations," Energies, MDPI, vol. 17(24), pages 1-21, December.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:24:p:6477-:d:1550398
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    References listed on IDEAS

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    1. Xiaomei Guo & Mingyu Yang & Fengqin Li & Zuchao Zhu & Baoling Cui, 2024. "Investigation on Cryogenic Cavitation Characteristics of an Inducer Considering Thermodynamic Effects," Energies, MDPI, vol. 17(15), pages 1-14, July.
    2. Wenqi Ke & Hao Zeng & Zhuoyu Wang & Hong Yu & Yaxin Liu & Danzhu Zheng & Jianjun Zhu & Haiwen Zhu, 2023. "A Numerical Study on Labyrinth Screw Pump (LSP) Performance under Viscous Fluid Flow," Energies, MDPI, vol. 16(16), pages 1-15, August.
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