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Numerical and Experimental Analysis of Vortex Profiles in Gravitational Water Vortex Hydraulic Turbines

Author

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  • Laura Velásquez

    (Grupo de Energía Alternativa, Facultad de Ingeniería, Universidad de Antioquia, Calle 70 No. 52-21, Medellín 050010, Colombia)

  • Ainhoa Rubio-Clemente

    (Grupo de Energía Alternativa, Facultad de Ingeniería, Universidad de Antioquia, Calle 70 No. 52-21, Medellín 050010, Colombia
    Escuela Ambiental, Facultad de Ingeniería, Universidad de Antioquia, Calle 70 No. 52-21, Medellín 050010, Colombia)

  • Edwin Chica

    (Grupo de Energía Alternativa, Facultad de Ingeniería, Universidad de Antioquia, Calle 70 No. 52-21, Medellín 050010, Colombia)

Abstract

This work compared the suitability of the k- ϵ standard, k- ϵ RNG, k- ω SST, and k- ω standard turbulence models for simulating a gravitational water vortex hydraulic turbine using ANSYS Fluent. This study revealed significant discrepancies between the models, particularly in predicting vortex circulation. While the k- ϵ RNG and standard k- ω models maintained relatively constant circulation values, the k- ϵ standard model exhibited higher values, and the k- ω SST model showed irregular fluctuations. The mass flow rate stabilization also varied, with the k- ϵ RNG, k- ω SST, and k- ω standard models being stabilized around 2.1 kg/s, whereas the k- ϵ standard model fluctuated between 1.9 and 2.1 kg/s. Statistical analyses, including ANOVA and multiple comparison methods, confirmed the significant impact of the turbulence model choice on both the circulation and mass flow rate. Experimental validation further supported the numerical findings by demonstrating that the k- ω shear stress transport (SST) model most closely matched the real vortex profile, followed by the k- ϵ RNG model. The primary contribution of this work is the comprehensive evaluation of these turbulence models, which provide clear guidance on their applicability to gravitational water vortex hydraulic turbine simulations.

Suggested Citation

  • Laura Velásquez & Ainhoa Rubio-Clemente & Edwin Chica, 2024. "Numerical and Experimental Analysis of Vortex Profiles in Gravitational Water Vortex Hydraulic Turbines," Energies, MDPI, vol. 17(14), pages 1-19, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:14:p:3543-:d:1438346
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    References listed on IDEAS

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    1. Edirisinghe, Dylan S. & Yang, Ho-Seong & Gunawardane, S.D.G.S.P. & Lee, Young-Ho, 2022. "Enhancing the performance of gravitational water vortex turbine by flow simulation analysis," Renewable Energy, Elsevier, vol. 194(C), pages 163-180.
    2. George E. Halkos & Eleni-Christina Gkampoura, 2020. "Reviewing Usage, Potentials, and Limitations of Renewable Energy Sources," Energies, MDPI, vol. 13(11), pages 1-19, June.
    3. Betancour, Johan & Romero-Menco, Fredys & Velásquez, Laura & Rubio-Clemente, Ainhoa & Chica, Edwin, 2023. "Design and optimization of a runner for a gravitational vortex turbine using the response surface methodology and experimental tests," Renewable Energy, Elsevier, vol. 210(C), pages 306-320.
    4. Velásquez, Laura & Posada, Alejandro & Chica, Edwin, 2023. "Surrogate modeling method for multi-objective optimization of the inlet channel and the basin of a gravitational water vortex hydraulic turbine," Applied Energy, Elsevier, vol. 330(PB).
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