A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine
Ocean energy represents a promising resource for renewable energy generation. Hydrokinetic turbines (HKTs) provide a sustainable method to extract energy from ocean currents. However, turbine efficiency remains limited, particularly in marine environments with low flow velocities. A parametric evalu...
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MDPI AG
2025-04-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/13/5/868 |
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| author | Xiang Ying Tham Cheng Yee Ng Muk Chen Ong Novi Fairindah Tingkas |
| author_facet | Xiang Ying Tham Cheng Yee Ng Muk Chen Ong Novi Fairindah Tingkas |
| author_sort | Xiang Ying Tham |
| collection | DOAJ |
| description | Ocean energy represents a promising resource for renewable energy generation. Hydrokinetic turbines (HKTs) provide a sustainable method to extract energy from ocean currents. However, turbine efficiency remains limited, particularly in marine environments with low flow velocities. A parametric evaluation of blade configurations is conducted in this study to assess their effect on the power and torque performance of a double-stage drag-based Savonius HKT. Numerical simulations are conducted using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations with the k-ω SST turbulence model. The numerical model is validated against published data, and analyses on mesh density, domain size, and time step are performed to ensure accuracy. Three blade configurations—(0°, 0°), (0°, 45°), and (0°, 90°) are evaluated under flow velocities of 0.6 m/s, 0.8 m/s, and 1.0 m/s. Results indicate that blade configuration significantly affects turbine performance. The (0°, 0°) configuration performs best at high flow velocity (1.0 m/s), while the (0°, 45°) setup achieves the highest efficiency at 0.6 m/s. The (0°, 90°) configuration performs the least effectively across all conditions. A similar performance trend is observed for the torque coefficient. This study recommends selecting blade configurations based on flow velocity, providing design guidance for double-stage HKTs operating in varying marine conditions. |
| format | Article |
| id | doaj-art-7fd7b85aaa31450d82431d0f4e429d87 |
| institution | DOAJ |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-7fd7b85aaa31450d82431d0f4e429d872025-08-20T03:14:36ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-04-0113586810.3390/jmse13050868A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic TurbineXiang Ying Tham0Cheng Yee Ng1Muk Chen Ong2Novi Fairindah Tingkas3Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, MalaysiaDepartment of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, MalaysiaDepartment of Mechanical and Structural Engineering and Materials Science, University of Stavanger, 4036 Stavanger, NorwayDepartment of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, MalaysiaOcean energy represents a promising resource for renewable energy generation. Hydrokinetic turbines (HKTs) provide a sustainable method to extract energy from ocean currents. However, turbine efficiency remains limited, particularly in marine environments with low flow velocities. A parametric evaluation of blade configurations is conducted in this study to assess their effect on the power and torque performance of a double-stage drag-based Savonius HKT. Numerical simulations are conducted using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations with the k-ω SST turbulence model. The numerical model is validated against published data, and analyses on mesh density, domain size, and time step are performed to ensure accuracy. Three blade configurations—(0°, 0°), (0°, 45°), and (0°, 90°) are evaluated under flow velocities of 0.6 m/s, 0.8 m/s, and 1.0 m/s. Results indicate that blade configuration significantly affects turbine performance. The (0°, 0°) configuration performs best at high flow velocity (1.0 m/s), while the (0°, 45°) setup achieves the highest efficiency at 0.6 m/s. The (0°, 90°) configuration performs the least effectively across all conditions. A similar performance trend is observed for the torque coefficient. This study recommends selecting blade configurations based on flow velocity, providing design guidance for double-stage HKTs operating in varying marine conditions.https://www.mdpi.com/2077-1312/13/5/868hydrokinetic turbinedouble-stage turbineblade configurationpower coefficient (Cp)torque coefficient (Ct) |
| spellingShingle | Xiang Ying Tham Cheng Yee Ng Muk Chen Ong Novi Fairindah Tingkas A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine Journal of Marine Science and Engineering hydrokinetic turbine double-stage turbine blade configuration power coefficient (Cp) torque coefficient (Ct) |
| title | A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine |
| title_full | A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine |
| title_fullStr | A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine |
| title_full_unstemmed | A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine |
| title_short | A Parametric Study on the Effect of Blade Configuration in a Double-Stage Savonius Hydrokinetic Turbine |
| title_sort | parametric study on the effect of blade configuration in a double stage savonius hydrokinetic turbine |
| topic | hydrokinetic turbine double-stage turbine blade configuration power coefficient (Cp) torque coefficient (Ct) |
| url | https://www.mdpi.com/2077-1312/13/5/868 |
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