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Numerical Study of the Effect of Geometry and Operating Parameters on the Performance of Savonius Vertical Axis Wind Turbine


Affiliations
1 Department of Mechanical Engineering, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Chennai 600 127, India
 

The Savonius turbine is a vertical axis wind turbine (VAWT) suitable to be mounted on rooftops of highrise buildings. It is a viable technology for power generation. The operating parameters and rotor design have a significant effect on the performance of VAWT. We have studied the effects of various parameters such as number of blades, blade arc angle, overlap ratio and gap width ratio on the performance of VAWT. Data from the literature have been reviewed for completeness. Two-dimensional numerical study subjected to a thorough grid independence study was conducted using ANSYS Fluent 15.0, and the results have been validated. The results show that the rotor system with two-blade arrangement performs better at tip speed ratio of 0.8. The rotor with gap width ratio of 0.15 and blade arc angle of 180° was found to perform better at a wind velocity of 7 m/s. Overlap ratio and modifications in the blade were found to have a negative effect on the performance.

Keywords

Numerical Study, Power Generation, Rotor Design, Rooftop Systems, Tip Speed Ratio, Wind Turbine.
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  • Numerical Study of the Effect of Geometry and Operating Parameters on the Performance of Savonius Vertical Axis Wind Turbine

Abstract Views: 287  |  PDF Views: 80

Authors

J. Ramarajan
Department of Mechanical Engineering, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Chennai 600 127, India
S. Jayavel
Department of Mechanical Engineering, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram, Chennai 600 127, India

Abstract


The Savonius turbine is a vertical axis wind turbine (VAWT) suitable to be mounted on rooftops of highrise buildings. It is a viable technology for power generation. The operating parameters and rotor design have a significant effect on the performance of VAWT. We have studied the effects of various parameters such as number of blades, blade arc angle, overlap ratio and gap width ratio on the performance of VAWT. Data from the literature have been reviewed for completeness. Two-dimensional numerical study subjected to a thorough grid independence study was conducted using ANSYS Fluent 15.0, and the results have been validated. The results show that the rotor system with two-blade arrangement performs better at tip speed ratio of 0.8. The rotor with gap width ratio of 0.15 and blade arc angle of 180° was found to perform better at a wind velocity of 7 m/s. Overlap ratio and modifications in the blade were found to have a negative effect on the performance.

Keywords


Numerical Study, Power Generation, Rotor Design, Rooftop Systems, Tip Speed Ratio, Wind Turbine.



DOI: https://doi.org/10.18520/cs%2Fv119%2Fi12%2F1927-1938