Prabawanto, Mochammad Nur Irsyad (2026) Analysis of the Effects of Tapered Blade Ratio Variations and Tip Speed Ratio (TSR) on the Performance of a Savonius Wind Turbine Using Computational Fluid Dynamics (CFD). Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The increasing demand for electrical energy and the high carbon emissions caused by fossil fuel consumption have encouraged the development of renewable energy, particularly wind energy. The Savonius wind turbine was selected because it can operate effectively at low wind speeds commonly found in Indonesia; however, it still has the drawback of a relatively low coefficient of power (CoP). This study aims to analyze the effect of tapered blade ratio and tip speed ratio (TSR) variations on the performance of a Savonius wind turbine using the Computational Fluid Dynamics (CFD) method. Three-dimensional (3D) simulations were conducted using ANSYS Fluent 2021 R2 with the realizable k-ε turbulence model and sliding mesh method. The taper ratios investigated were 0.7, 0.6, and 0.5, with TSR variations ranging from 0.2 to 1.2. The analyzed parameters included coefficient of power (CoP), coefficient of moment (CoM), and coefficient of static torque (CTs). The results showed that the taper ratio significantly affected the turbine performance. The 0.7 taper ratio produced the best performance with a maximum CoP value of 0.478 at TSR 1.0, while the 0.5 taper ratio resulted in the lowest performance with a maximum CoP value of 0.314 at TSR 0.6. Flow contour analysis indicated that the tapered blade geometry reduced flow separation and increased the drag force on the advancing blade, thereby improving turbine efficiency under low wind speed conditions
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||||||
| Divisions: | Faculty of Engineering > Departement of Mechanical Engineering | ||||||||||||
| Depositing User: | MOCHAMMAD NUR IRSYAD PRABAWANTO | ||||||||||||
| Date Deposited: | 06 Jul 2026 02:38 | ||||||||||||
| Last Modified: | 06 Jul 2026 02:38 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/54464 |
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