Numerical Study of H-Darrieus Turbine as a Rotor for Gravitational Vortex Turbine

Rio, Jorge Sierra-Del; Sánchez, Alejandro Ruiz; Villa, Daniel Sanín; Quintana, Edwin Correa

doi:10.37934/cfdl.14.8.111

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Three-dimensional numerical simulations of a Lucid spherical rotor were performed using Ansys Fluent 17.0. This commercial code solves the Navier-Stokes equations using a finite volume discretization method [17,18].…”

Section: Computation Domains and Boundary Conditionsmentioning

confidence: 99%

Effect of the Turbulence Model on the Computational Results of a Lucid Spherical Rotor

Mabrouk Mosbahi,

Mariem Lajnef,

Mouna Derbel

et al. 2024

ARFMTS

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Due to the excessive increase in the energy demand, renewable energy has become an alternative for electricity production for industrial and domestic needs. Water energy has received significant investment as a sustainable and clean energy source. Lucid spherical rotors, a kind of hydro-power converter, are cross flow rotors designed to be mounted within a pipeline in order to gather excess energy available in gravity-fed water pipelines. This paper focuses on the effect of the numerical model parameters choice, namely the turbulence model, on the Lucid spherical rotor hydrodynamic characteristics. Numerical simulations were carried out through Ansys Fluent software 17.0 using the unsteady Reynolds-Averaged Navier-Stokes (URANS) equations. Four turbulence models: RNG k-ε, Realizable k-ε, SST k-ω and transition SST were tested. Performance characteristics in terms of torque and power coefficients in addition to hydrodynamic features of the flow around the considered rotor were analyzed. The adopted numerical model was validated based on previous experimental findings from the literature. It was found that the realizable k-ε model showed a good agreement with experimental results. Thus, it was adopted for the Lucid spherical rotor simulation. The obtained findings could provide further direction for researchers to use the Lucid spherical water turbine.

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Section: Computation Domains and Boundary Conditionsmentioning

confidence: 99%

Effect of the Turbulence Model on the Computational Results of a Lucid Spherical Rotor

Mabrouk Mosbahi,

Mariem Lajnef,

Mouna Derbel

et al. 2024

ARFMTS

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show abstract

“…In addition, Aziz et al, [9] conducted an experimental study using a flat turbine in the enclosed gravitational water vortex system and found a maximum mechanical efficiency of 16.06% with the best efficient point at 6.3 L/s of water flow rate. Whilst Del Rio et al, [10] numerically study the torque produced at different rotational speeds and in this case, the H-Darrieus type of turbine was used as the rotor in the water vortex turbine, and they found that the maximum torque was at 50 RPM. Moreover, Aziz et al, [11] found that the maximum torque of 15.31 N can be produced using 12 runner blades at 90 o blade angle.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Crossflow Vortex Turbine for a Gravitational Water Vortex Power Plant

Abel Alfeuz,

Fadzlita Tamiri,

Farm Yan Yan

et al. 2024

ARFMTS

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The micro hydro system is the most favorable renewable energy source to supply electricity for rural areas. The Gravitational Water Vortex Power Plant (GWVPP) is one of the micro hydro systems that is suitable for very low-head hydropower sites. GWVPP consists of three major parts: electromechanical components, civil structures, and electric distribution. The micro hydro turbine in GWVPP is called a vortex hydro turbine and is used to convert induced vortex flow to mechanical energy coupled with a generator to produce electricity. This paper investigates crossflow vortex turbine performance using Computational Fluid Dynamics (CFD) software and experimental work. The CFD results provide qualitative and quantitative comprising velocity distribution, water vortex profile, and water vortex height. The optimum hydraulic performance in the water vortex was observed and determined for different turbine positions. The vortex crossflow turbine was placed 0.05 m from the bottom surface of the basin at the highest vortex tangential velocity. A 0.05 m turbine position was chosen for the turbine installations as it creates a high-velocity profile. The comparative performance was conducted on the vortex crossflow blade with different inlet blade angle designs at a range of 400 – 700. The experimental analysis was conducted at rotational speeds of 30 rpm – 70 rpm to determine its efficiency performance. The optimum design for the crossflow blade was at 500 with an operational speed of 50 rpm, which exhibited torque and power output at 0.27±0.02 m and 1.49±0.08 m respectively with an efficiency recorded at 18.98%.

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Numerical Comparison of Three Rotors For Gravitational Water Vortex Turbine

Ruiz Sánchez,

Sierra Del Rio,

Posada Montoya

et al. 2024

CFD Lett.

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Renewable energy sources have gained significant attention due to the increasing demand for clean energy production. The gravitational vortex turbine (GVT) is one of the emerging technologies in the field of renewable energy that has gained attention for its simple and low-cost manufacturing process. The turbine operates by utilizing the energy of wastewater or other liquid flows to generate power on-site, making it a potentially viable solution for small-scale power generation. However, the optimization of the turbine's design is necessary to improve its efficiency and to make it a more competitive source of renewable energy. Previous research on GVT has mainly focused on the chamber's design to improve the formation of the vortex. However, little attention has been paid to the rotor design, which is also a critical parameter affecting the turbine's performance. The current study aimed to investigate the performance of three different rotors for the turbine, including the Savonius, H-Darrieus, and a standard rotor with straight blades, using numerical simulations. The numerical simulations were performed using ANSYS software, with ICEM modules for discretization and CFX for simulation. The results showed that the straight-bladed rotor outperformed the other two rotors, with an increase in efficiency of 40% and 79% compared to the Savonius and H-Darrieus geometry blades, respectively. The study highlights the importance of considering the rotor design in the optimization of the gravitational vortex turbine. The results provide valuable insights into the design parameters that can be used to enhance the turbine's performance. These findings can contribute to the development of more efficient and cost-effective gravitational vortex turbines for on-site power generation and consumption.

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Numerical Study of H-Darrieus Turbine as a Rotor for Gravitational Vortex Turbine

Cited by 3 publications

References 15 publications

Effect of the Turbulence Model on the Computational Results of a Lucid Spherical Rotor

Effect of the Turbulence Model on the Computational Results of a Lucid Spherical Rotor

Performance Analysis of a Crossflow Vortex Turbine for a Gravitational Water Vortex Power Plant

Numerical Comparison of Three Rotors For Gravitational Water Vortex Turbine

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