Nondimensional Parameters’ Effects on Hybrid Darrieus–Savonius Wind Turbine Performance

Roshan, Armin; Sagharichi, A.; Maghrebi, Mohammad Javad

doi:10.1115/1.4044517

Cited by 29 publications

(6 citation statements)

References 18 publications

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“…However, this method is not optimal because it is only effective for one direction of fluid flow. [19] conducted a CFD study on the effect of the overlap ratio of Savonius on the performance of the hybrid Savonius-Darrieus. As a result, increasing the overlap ratio can increase turbine self-starting, and an overlap ratio of 2.5 can increase 𝐶 𝑃 by 18% from the basic hybrid Savonius-Darrieus model.…”

Section: Figurementioning

confidence: 99%

The Effect of Rotor Radius Ratio on The Performance of Hybrid Vertical Axis Wind Turbine Savonius-Darrieus NREL S809

Irawan¹,

Sitompul²,

Yamashita³

et al. 2023

J Energ Power Technol

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This research aims to know the effect of the Rotor Radius Ratio on the performance of the hybrid Vertical Axis Wind Turbine Savonius-Darrieus NREL S809 model using the Computational Fluid Dynamics method. Two-bladed Savonius is used as an internal rotor, and three-bladed Darrieus NREL S809 as an external rotor. Turbine model performance is analyzed through the value of the Moment Coefficient and Power Coefficient. The result shows that the increase in the Rotor Radius Ratio value causes an increase in the initial Moment Coefficient but a decrease in the maximum Power Coefficient value. At the initial TSR, the Rotor Radius Ratio 0.5 model has the best Moment Coefficient value among all variations but has the lowest maximum Power Coefficient value.

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Section: Figurementioning

confidence: 99%

The Effect of Rotor Radius Ratio on The Performance of Hybrid Vertical Axis Wind Turbine Savonius-Darrieus NREL S809

Irawan¹,

Sitompul²,

Yamashita³

et al. 2023

J Energ Power Technol

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“…The base design parameters for the initial design of this study are shown in Table 1 [21]. It is a combination of straight Darrieus rotor and conventional Savonius rotor.…”

Section: D Geometry Modellingmentioning

confidence: 99%

“…To check the effectiveness of the generated models, Model Base was selected which is a hybrid Savonius-Darrieus VAWT designed and studied by Roshan [21]. Model Base, Model 1 and Model 2 were simulated and experimented at 36 different angles from 0º to 360º.…”

Section: Comparison Of Wind Turbines At Different Anglesmentioning

confidence: 99%

Numerical Investigation of Hybrid Savonius-Darrieus Vertical Axis Wind Turbine at Low Wind Speeds

Eftekhari¹,

Al-Obaidi²,

Srirangam³

2023

J. Phys.: Conf. Ser.

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The need for electricity on the Earth is increasing day by day, and this requires building more electric power plants where most of the power plants cause CO2 emission which would increase the global warming. Using wind energy as one type of renewable energies, would contribute to reduce the global warming. In countries such as Malaysia where the average annual wind speed is 2-2.5 m/s using wind energy is a challenge because of the low wind speed. However, using a hybrid Savonius-Darrieus vertical axis wind turbine in low wind speed areas, the performance of the wind turbine may increase, and the starting rotation speed will decrease. This research aims at a comprehensive study on a hybrid Savonius-Darrieus wind turbine with helical Savonius rotor combined with helical and straight bladed Darrieus rotor. In this research, a base model with the name of Model Base was generated and two models with new configurations were generated in SOLIDWORKS. A numerical studies and simulation were conducted on these three designs using Ansys Fluent to identify the more suitable combination for low wind speed areas. Based on the obtained result hybrid Savonius-Darrieus with helical Savonius rotor and helical Darrieus rotor were found to be the most suitable combination because of their stable aerodynamic performance throughout a full rotation. Best performance for these models was found to be at 0.45 TRS with maximum torque and power coefficients of 0.68 and 0.306 respectively.

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“…According to the mentioned literature review [38,39], it can be concluded that there is a lack of investigation into the performance of the triple-blade Savonius wind turbine. In this study, a modified triple-blade Savonius rotor at different wind velocities of 3 to 6 m/s (according to the previous relevant works [21,40]) is considered and evaluated comprehensively.…”

Section: Introductionmentioning

confidence: 99%

On the Performance of a Modified Triple Stack Blade Savonius Wind Turbine as a Function of Geometrical Parameters

et al. 2022

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The Savonius wind turbine is one of the most well-known vertical axis wind turbines with insensitivity to wind direction, flow turbulence, and high torque generation. These turbines can extract up to 20% of the energy from the wind. This study numerically analyzes the performance of a modified Savonius wind turbine equipped with secondary blades and slots. The k-ε standard method is used to simulate the turbulence flow around the turbine, and the simulation is performed using the ANSYS FLUENT 18.2 commercial code. The effects of distance between the main blade and the secondary blade, position of the secondary blade, the width of the main blade’s slot, and the profile of the secondary blade on the produced torque are studied and analyzed. The simulation is performed at four wind velocities: 3, 4, 5, and 6 m/s. The results showed that the output torque at the secondary blade angular position β = 130 is higher than other angles. Furthermore, by increasing the radius of the additional blade from R = 25 to 43 mm, the torque is improved, and the area below the output torque curve is increased. Moreover, the results showed that creating a slot on the main blade equipped with a secondary blade has a significant impact on the produced torque; however, the geometrical parameters of the proposed rotors should be adjusted accurately to find the best case in terms of the produced torque.

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Nondimensional Parameters’ Effects on Hybrid Darrieus–Savonius Wind Turbine Performance

Cited by 29 publications

References 18 publications

The Effect of Rotor Radius Ratio on The Performance of Hybrid Vertical Axis Wind Turbine Savonius-Darrieus NREL S809

The Effect of Rotor Radius Ratio on The Performance of Hybrid Vertical Axis Wind Turbine Savonius-Darrieus NREL S809

Numerical Investigation of Hybrid Savonius-Darrieus Vertical Axis Wind Turbine at Low Wind Speeds

On the Performance of a Modified Triple Stack Blade Savonius Wind Turbine as a Function of Geometrical Parameters

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