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Overview of application options for vertical axis wind turbines

Waldemar Kuczyński Iwona Michalska-Pożoga Marcin Szczepanek Krzysztof Chmiel

Archives of Thermodynamics | 2023 | vol. 44 | No 4 | 665-704 | DOI: 10.24425/ather.2023.149737

Keywords wind energy wind turbines Savonius’ law

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Abstract

The article presents an analysis of the use of Savonius wind turbines with vertical axis of rotation. The first part presents an analysis of the literature with the dentification of the properties of the basic atmospheric parameters related to the air movement referred to as wind. Used mathematical descriptions used in the analysis of air movement and enabling the identification of basic thermodynamic parameters of wind turbines with a vertical axis of rotation were presented. Then, the historical background of the development of wind turbines with a vertical axis of rotation was presented, and constructions of this type currently used were described. Proposals for modification of the configuration and design of Savonius rotors and the impact of these activities on their efficiency were analyzed. These issues were presented in relation to the experimental work carried out in the international research centers. Obvious advantages and disadvantages of using this type of equipment in the field of wind energy were indicated.

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Authors and Affiliations

Waldemar Kuczyński

Iwona Michalska-Pożoga

Marcin Szczepanek

Krzysztof Chmiel

Technical University of Koszalin, Faculty of Mechanical Engineering and Energy, Department of Energy, Racławicka 15-17, 75-620 Koszalin, Poland
Technical University of Koszalin, Faculty of Mechanical Engineering, Department of Food Processes and Equipment, Racławicka 15-17, 75-620 Koszalin, Poland
Maritime University of Technology of Szczecin, Faculty of Mechanical Engineering, Willowa 2, 75-500 Szczecin

Application of overset mesh approach in the investigation of the Savonius wind turbines with rigid and deformable blades

Emil Marchewka Krzysztof Sobczak Piotr Reorowicz Damian Stanisław Obidowski Krzysztof Jóźwik

Archives of Thermodynamics | 2021 | vol. 42 | No 4 | 201-216 | DOI: 10.24425/ather.2021.139659

Keywords CFD Savonius Deformable blade Overset mesh Sliding mesh

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Abstract

Machines utilising renewable energy constantly undergo research aimed at raising their efficiency. One of them is a Savonius wind turbine, where scientists propose adjustments to improve its aerodynamic properties. At present, their assessment is usually performed by means of transient computational fluid dynamics simulations with two- or threedimensional models. In this paper, the overset (chimera) mesh approach was applied to investigate the performance of a Savonius wind turbine equipped with deformable blades. They were continuously deformed during rotation by a dedicated mechanism to increase a positive torque of the advancing blade, and meanwhile, decrease a negative torque of the returning blade. A quasi-two-dimensional model with a two-way fluid-structure interaction method was applied, where the structural solver determined blade deflection caused by the predefined deformation mechanism and aerodynamic loads, whereas the coupled computational fluid dynamics solver determined the transient flow. The deformable blades rotor performance was calculated and compared with a conventional rigid Savonius turbine, both simulated using the overset mesh approach. The average value of the power coefficient achieved a 55% rise in the case of deformable blades turbine. Additionally, to validate the overset method, its results were compared with the classical sliding mesh method for a conventional rigid rotor.

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Bibliography

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Authors and Affiliations

Emil Marchewka

Krzysztof Sobczak

Piotr Reorowicz

Damian Stanisław Obidowski

Krzysztof Jóźwik

Lodz University of Technology, Institute of Turbomachinery, Wólczanska 219/223, 90-924 Łódz, Poland

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Overview of application options for vertical axis wind turbines

Abstract

Authors and Affiliations

Application of overset mesh approach in the investigation of the Savonius wind turbines with rigid and deformable blades

Abstract

Bibliography

Authors and Affiliations