Investigation of the blade tip geometry for improved performance of a Savonius rotor
Savonius wind rotors are highly effective at capturing wind energy due to their unique design, which includes vertically curved blades that can harness wind from multiple directions. This study focuses on optimizing the performance of a two-bladed Savonius wind rotor using Computational Fluid Dynami...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025028129 |
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| author | Ahmed Ayadi Nour Rabeh Jihen Marzougui Ridha Ennetta Zied Driss |
| author_facet | Ahmed Ayadi Nour Rabeh Jihen Marzougui Ridha Ennetta Zied Driss |
| author_sort | Ahmed Ayadi |
| collection | DOAJ |
| description | Savonius wind rotors are highly effective at capturing wind energy due to their unique design, which includes vertically curved blades that can harness wind from multiple directions. This study focuses on optimizing the performance of a two-bladed Savonius wind rotor using Computational Fluid Dynamics (CFD) simulations in ANSYS Fluent, with results validated against experimental data. Novel blade shapes are assessed to determine their impact on torque generation, power output, and key performance indicators such as velocity and pressure distributions. Three configurations are proposed, including modifications at the blade ends, modifications near the rotor center, and combined modifications at both the ends and the center.The results demonstrate that optimizing blade geometry can significantly enhance torque generation and power output, leading to improved energy capture. Specifically, several modified Savonius rotors have achieved higher power coefficients (Cp) compared to the standard Savonius rotor design. Among these cases, the optimized configuration reached a peak power coefficient of 0.285 at a Tip Speed Ratio (TSR) of 1.2. This represents a 20.76 % improvement over the standard Savonius rotor at the same TSR. |
| format | Article |
| id | doaj-art-96ab4cd647b04bea8f41c3366f547bba |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-96ab4cd647b04bea8f41c3366f547bba2025-08-20T04:02:50ZengElsevierResults in Engineering2590-12302025-09-012710674510.1016/j.rineng.2025.106745Investigation of the blade tip geometry for improved performance of a Savonius rotorAhmed Ayadi0Nour Rabeh1Jihen Marzougui2Ridha Ennetta3Zied Driss4Laboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax, University of Sfax, Tunisia; Higher Institute of Industrial Systems of Gabes (ISSIG), University of Gabes, Tunisia; Corresponding author.Laboratory of Mechanical Modeling, Energy & Materials (LM2EM), National Engineering School of Gabes (ENIG), University of Gabes, TunisiaHigher Institute of Industrial Systems of Gabes (ISSIG), University of Gabes, TunisiaHigher Institute of Industrial Systems of Gabes (ISSIG), University of Gabes, Tunisia; Laboratory of Mechanical Modeling, Energy & Materials (LM2EM), National Engineering School of Gabes (ENIG), University of Gabes, TunisiaLaboratory of Electro-Mechanic Systems (LASEM), National School of Engineers of Sfax, University of Sfax, TunisiaSavonius wind rotors are highly effective at capturing wind energy due to their unique design, which includes vertically curved blades that can harness wind from multiple directions. This study focuses on optimizing the performance of a two-bladed Savonius wind rotor using Computational Fluid Dynamics (CFD) simulations in ANSYS Fluent, with results validated against experimental data. Novel blade shapes are assessed to determine their impact on torque generation, power output, and key performance indicators such as velocity and pressure distributions. Three configurations are proposed, including modifications at the blade ends, modifications near the rotor center, and combined modifications at both the ends and the center.The results demonstrate that optimizing blade geometry can significantly enhance torque generation and power output, leading to improved energy capture. Specifically, several modified Savonius rotors have achieved higher power coefficients (Cp) compared to the standard Savonius rotor design. Among these cases, the optimized configuration reached a peak power coefficient of 0.285 at a Tip Speed Ratio (TSR) of 1.2. This represents a 20.76 % improvement over the standard Savonius rotor at the same TSR.http://www.sciencedirect.com/science/article/pii/S2590123025028129VAWTWind turbineSavonius rotorDesignPerformanceRotor efficiency |
| spellingShingle | Ahmed Ayadi Nour Rabeh Jihen Marzougui Ridha Ennetta Zied Driss Investigation of the blade tip geometry for improved performance of a Savonius rotor Results in Engineering VAWT Wind turbine Savonius rotor Design Performance Rotor efficiency |
| title | Investigation of the blade tip geometry for improved performance of a Savonius rotor |
| title_full | Investigation of the blade tip geometry for improved performance of a Savonius rotor |
| title_fullStr | Investigation of the blade tip geometry for improved performance of a Savonius rotor |
| title_full_unstemmed | Investigation of the blade tip geometry for improved performance of a Savonius rotor |
| title_short | Investigation of the blade tip geometry for improved performance of a Savonius rotor |
| title_sort | investigation of the blade tip geometry for improved performance of a savonius rotor |
| topic | VAWT Wind turbine Savonius rotor Design Performance Rotor efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025028129 |
| work_keys_str_mv | AT ahmedayadi investigationofthebladetipgeometryforimprovedperformanceofasavoniusrotor AT nourrabeh investigationofthebladetipgeometryforimprovedperformanceofasavoniusrotor AT jihenmarzougui investigationofthebladetipgeometryforimprovedperformanceofasavoniusrotor AT ridhaennetta investigationofthebladetipgeometryforimprovedperformanceofasavoniusrotor AT zieddriss investigationofthebladetipgeometryforimprovedperformanceofasavoniusrotor |