Comprehensive experimental and numerical assessment of a drag turbine for river hydrokinetic energy conversion

Ramadan, Ahmed; Hemida, M.; Abdel-Fadeel, Waleed A.; Aissa, W. A.; Mohamed, Mohamed H.

doi:10.1016/j.oceaneng.2021.108587

Cited by 19 publications

(10 citation statements)

References 15 publications

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“…Dual splitters were added (Patel and Patel, 2021) to the blade of Savonius turbine to improve the aerodynamic distribution of the flow inside the blades, and they succeeded in increasing the performance by 7.3%. Ramadan et al (2021) used the S-shape blade with a deflector to enhance the performance. This enhanced the performance, and the maximum power coefficient was 0.24.…”

Section: Purpose Of the Present Workmentioning

confidence: 99%

Enhancement Attempts for a Three-Bladed Savonius Turbine Performance

et al. 2022

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In this work, the performance of a new wind turbine design derived from a conventional Savonius turbine is investigated by numerical simulations. The new design consists of three blades without passage between them (closed center). All unsteady computations (which mean computational fluid dynamics as well in the next sections) presented in the current work depend on a commercial software ANSYS Fluent 19. In particular, the blade geometry, the influence of a deflecting plate, and the influence of mobile parts on the returning plate have been investigated in detail. Since first results were partly disappointing for the turbine with a deflector but very interesting for the turbine with an opening blade, these same properties have also been investigated for the classical Savonius turbine. By comparison between both, an optimal solution can emerge from this first study for these designs. The results indicated that the opening blade design improved the performance by 25.9% at λ = 0.7; however, the deflecting plate reduces the performance along the operating range.

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Section: Purpose Of the Present Workmentioning

confidence: 99%

Enhancement Attempts for a Three-Bladed Savonius Turbine Performance

et al. 2022

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“…Dual splitters were added by Patel and Patel (2021) to the Savonius turbine blades to improve the aerodynamic distribution of the flow inside the blades, and they succeeded in increasing the performance by 7.3%. Ramadan et al (2021) used S-shaped blades with deflectors to enhance the performance. They enhanced the performance, and the maximum power coefficient was 0.24.…”

Section: Purpose Of the Present Studymentioning

confidence: 99%

Automatic Blade Shape Optimization of a Three-Bladed Modified Savonius Turbine

2022

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In this study, the performance of a new wind turbine design derived from a conventional Savonius turbine is optimized by numerical simulation. The new design consists of three blades without passage between them (closed center). The coupling between the CFD codes (ANSYS Fluent) and the optimizer (OPAL) is used through an automatic procedure in-house codes, as documented, for example, in Thévenin et al.’s Optimization and Computational Fluid Dynamics (2008). A single-objective function (output power coefficient, Cp) is considered as the target of the optimization technique and the shape of the blade as an optimization parameter and relies on evolutionary algorithms. An optimal solution can emerge from this optimization study. By comparison between regular design (semi-cylindrical shape blades) and the optimal configuration, a considerable improvement (up to 7.13% at λ = 0.7) of the optimal configuration performance can be obtained in this manner.

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“…The results show that hybrid rotor experienced smooth flow and low pressure over the structure. Ramadan et al [29] assessed two Savonious rotor profiles within an irrigation channel through CFD modelling (ANSYS) and physical models. The research concluded that the FLUENT module of ANSYS model depicted an acceptable accuracy due to the numericalexperimental results.…”

Section: Introductionmentioning

confidence: 99%

DOE-ANOVA to Optimize Hydrokinetic Turbines for Low Velocity Conditions

Rueda-Bayona¹,

Paez²,

Eras³

et al. 2022

MMEP

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The need of reducing the dependence of fossil fuels and CO2 emissions have motivated the diversification of energy matrix. Among the Renewables, the hydropower shows better characteristics compared to solar, wind, biomass and geothermal, because its low CO2 emissions, higher density and others technical factors. Within the Hydropower, the Hydrokinetic turbines (HT) are considered as a promising technology because can provide electricity during low flow velocity conditions (< 2 m/s) and is able to operate in shallow waters < 8 m and in secluded areas without access to the energy network. In this sense, the present study incentivizes the research in Hydropower and proposes and new application of DOE-ANOVA combined with Computational Fluid Dynamics (CFD) modelling for the HT design and optimization. Accordingly, this work evaluated the performance of a HT with 1.9 m of rotor diameter operating in a water flow of 1.5 m/s through a 23 factorial design with 9 modelling cases (MC). The results showed that the increment of outlet diameters increased the downstream velocity and the hydrodynamic pressure over the HT, and the reduction of the blade tip edge distance generated an increment of the response of the HT hydraulic and mechanical properties.

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Comprehensive experimental and numerical assessment of a drag turbine for river hydrokinetic energy conversion

Cited by 19 publications

References 15 publications

Enhancement Attempts for a Three-Bladed Savonius Turbine Performance

Enhancement Attempts for a Three-Bladed Savonius Turbine Performance

Automatic Blade Shape Optimization of a Three-Bladed Modified Savonius Turbine

DOE-ANOVA to Optimize Hydrokinetic Turbines for Low Velocity Conditions

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