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

Norouztabar, Reza; Ajarostaghi, Seyed Soheil Mousavi; Mousavi, Seyed Sina; Nejat, Payam; Koloor, Seyed Saeid Rahimian; Eldessouki, Mohamed

doi:10.3390/su14169816

Cited by 9 publications

(4 citation statements)

References 39 publications

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“…The creator of this turbine researched more than 40 different types of turbines [41], and these ideas are being developed to modern times [42][43][44]. Figure 8 shows Savonius' concepts [41] and contemporary solutions [45][46][47][48].…”

Section: Vertical Axis Wind Turbinesmentioning

confidence: 99%

Experimental Assessment of Suitability of Darrieus and Savonius Turbines for Obtaining Wind Energy from Passing Vehicles

Łyskawiński,

Kowalski,

Wojciechowski

2024

Energies

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The article deals with the results of a comparative analysis carried out on the construction of wind turbines applied in energy generation systems using the wind of passing vehicles. The structures of turbines with horizontal and vertical axes of rotation were considered. Vertical axis wind turbines (VAWTs) have been observed to operate in various wind directions, including highly turbulent winds. Therefore, for further experimental research, VAWTs have been selected, i.e., Darrieus and Savonius turbines and their modifications. For the purpose of experimental research, the authors developed and implemented their own laboratory setup. This setup enabled the measurement of quantities such as torque, power, and power coefficient and allowed for the determination of the start-up parameters of the investigated turbines. Moreover, as part of the research, wind speed was also measured in field conditions at a distance of 1 m from the expressway. The wind speed obtained from passing vehicles did not exceed 9 m/s. For this reason, the tests of the considered turbines using the experimental setup were performed for wind speeds in the range of 5.8–8.6 m/s. The investigations were conducted based on the obtained results, and it was concluded that the helical Savonius turbine possessed the highest efficiency (0.2047 from a wind speed of 5.8 m/s) in generating energy from the wind produced by vehicles traveling on roads.

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Section: Vertical Axis Wind Turbinesmentioning

confidence: 99%

Experimental Assessment of Suitability of Darrieus and Savonius Turbines for Obtaining Wind Energy from Passing Vehicles

Łyskawiński,

Kowalski,

Wojciechowski

2024

Energies

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“…𝑢́𝑖 = 𝑢 𝑖 − 𝑢 𝑖 ̅ is the ith fluctuating velocity component. The differential transport equation for calculation of the turbulence stress components is as follows [17][18][19]…”

Section: Configurations Of Considered Cyclonesmentioning

confidence: 99%

Numerical Investigation the Effects of Cone Diameters on the Flow Pattern and Separation Efficiency in a Cyclone Separator

Ajarostaghi

Mousavi

Bhojaraju³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In this work, the impact of cone diameters on the flow field and separation efficiency in a cyclone separator is examined numerically employing Reynolds Stress Model for eight various geometries of cyclone separators. The motion of solid particle in the flow field is modelled utilizing the Eulerian-Lagrangian method. Three-dimensional simulation of the air flow with solid particles in the cyclone is carried out by a commercial computational fluid dynamics software, ANSYS Fluent 18.2. The outcomes depict that by augmenting the small cone diameter, the maximum tangential velocity, static pressure, and collection efficiency decrease, however, cut-off diameter rises. Moreover, the axial velocity has steady trend throughout the cyclone. In addition, according to the obtained results, increasing the large cone diameter causes an increase in the tangential velocity and static pressure and improves the collection efficiency. While, the higher large cone diameter, the lower cut-off diameter. Growing the cyclone’s cone small diameter leads to a decrease in the collection efficiency. At a constant particle diameter, four microns, as the cone small diameter ratio augments by 150%, collection efficiency declines by about 10.42%. Augmentation the cyclone’s cone small diameter causes an increase in the cutoff diameter. By increasing the cone small diameter by about 150%, the cut-off diameter value increases by about 75%. Furthermore, the collection efficiency rises by growing the cyclone’s cone large diameter. At a constant particle diameter, four microns, as the cone large diameter augments by 50%, the collection efficiency increases by about 18.75%. Also, in all considered cone large diameter, the collection efficiency increases as the particle diameter rises. The cut-off diameter decreases by growing the cyclone’s cone large diameter. By augmenting the cone large diameter by about 50%, the cut-off diameter value declines by about 57.69%.

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“…The advantages of this turbine are easy construction with the lowest cost, low dependence of their operation on the direction of the wind, low noise during operation, low wear of moving parts, diversity in rotor type construction, and high dynamic and static torque [17][18][19]. Many sources also studied the functional parameters of Savonius wind turbines [20][21][22]. Also, a lot of research has been done on increasing the efficiency and optimizing the blades of this type of turbine.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Double Stack Blade Savonius Wind Turbine with Secondary Blades

Ajarostaghi

Mousavi

Bhojaraju³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In this work, the performance of the Savonius vertical axis wind turbine with secondary blades was investigated numerically. The impacts of two geometric parameters of the secondary blades, including the height of secondary blades (h) and the distance between the main and the secondary blades (b) on the output torque were analyzed. Numerical simulations were performed by a commercial CFD code, ANSYS FLUENT 18.2. Numerical results show that employing secondary blades has a constructive impact on the output torque compared to the case without secondary blades. Moreover, the studied geometric parameters of the secondary blades have a significant impoact on the performance of the proposed turbine. It can be seen that by increasing the height of secondary blades, the angular position of the maximum torque is shifted. At b = 2.5 mm, the difference between the models is more comparable. Models h = 6 and 12 mm have the highest output torque, although with a slight difference between them. Model h = 12 mm has the highest output torque. At b = 7.5 mm, the difference between the models is more comparable than b = 2.5 mm. Model h = 12 mm has the highest output torque and models h = 3 and 6 mm are in the next levels. Obtained results in the second section demonstrate that by growing the distance between the secondary and the main blades, in the case of h = 3 mm, the produced torque declines. Furthermore, by increasing the distance between the secondary and the main blades from b = 0 mm to b = 2.5 mm and b = 7.5 mm, the amount of torque produced decreases by 17.33 and 26.66%, respectively. Moreover, by augmenting the distance between the secondary and main blades from b = 2.5 mm to b = 7.5 mm (200% growth), the produced torque decreases by 11.3%.

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

Cited by 9 publications

References 39 publications

Experimental Assessment of Suitability of Darrieus and Savonius Turbines for Obtaining Wind Energy from Passing Vehicles

Experimental Assessment of Suitability of Darrieus and Savonius Turbines for Obtaining Wind Energy from Passing Vehicles

Numerical Investigation the Effects of Cone Diameters on the Flow Pattern and Separation Efficiency in a Cyclone Separator

Numerical Analysis of Double Stack Blade Savonius Wind Turbine with Secondary Blades

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