Performance Improvement in a Helical Savonius Wind Rotor

Lajnef, Mariem; Mosbahi, Mabrouk; Chouaibi, Youssef; Driss, Zied

doi:10.1007/s13369-020-04770-6

Cited by 24 publications

(7 citation statements)

References 35 publications

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“…Under the present study, the commercial computational fluid dynamics code Ansys Fluent 17.0 is used to solve the unsteady incompressible Reynolds-averaged Navier-Stokes equations. The governing equations are the Navier-Stokes equations [19][20][21][22]. The continuity equation is expressed in the following form:…”

Section: Numerical Settingsmentioning

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: Numerical Settingsmentioning

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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“…On the other hand, a too-small Δ t requires too much computational time. Time step size as expressed in equation (4) 39,110 was calculated from the azimuthal increments (Δ θ ). To optimize the value of Δ t , simulation processes were repeated with different values of Δ t in order to decrease computational time, the result accuracy nevertheless was still acceptable.…”

Section: Computational Evaluation On Individual and Combined Turbinesmentioning

confidence: 99%

Design evaluation reviews on the savonius, darrieus, and combined savonius-darrieus turbines

Tantichukiad

Yahya

Mustafah

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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The combination of Savonius and Darrieus turbines had been proposed with the aim to overcome the weaknesses and complement the strengths from each design. This paper gathers relevant information and provided an extensive review on the combined Savonius-Darrieus turbine for both wind and hydro applications. The paper initially reviews the experimental and computational methodologies utilized in previous research in design evaluation of the turbines. The self-starting capability and efficiency of both turbines were the main concern. Following this, investigations were conducted on the possibility of combining the advantages on the two turbines with respect on the design compactness, radius ratios, attachment angles and rotational velocities.

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“…From the comparison of one-stage and two-stage rotor, the coefficient of power of two stages helical Savonius is 7.69% higher. Lajnef et al (2020) studied on the effect of blade shape and overlap ratio on a helical Savonius wind turbine performance. They found that delta bladed rotor improves the performance of the HSR.…”

Section: Review On Cfd Analysismentioning

confidence: 99%

A comprehensive review on design and development analysis and blade material selection of helical Savonius rotor

Debnath

Gandhirajan

2023

Wind Engineering

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The helical Savonius rotor (HSR) is used as green energy generation. The accurate design of HSR is essential before installing any wind farm in a region. It has been widely employed that positive static torque coefficients of helical Savonius rotor are higher compared to conventional semicircular rotor stated by several researchers. The reason is behind that the formation of secondary vortex of fluid. It is leading by vertical vortex flow, which passes over the curve surface and creates drag force. Still now, various design have been proposed to meet peak power output through optimum geometry parameters like blade profile design, aspect ratio and overlap ratio. The selection of blade material is also the influencing parameter to improve the starting torque of the rotor. In this regards present paper is aim to study the details experimental, numerical, and analytical review on HSR and selection of blade material with minimum production cost.

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Performance Improvement in a Helical Savonius Wind Rotor

Cited by 24 publications

References 35 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

Design evaluation reviews on the savonius, darrieus, and combined savonius-darrieus turbines

A comprehensive review on design and development analysis and blade material selection of helical Savonius rotor

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