A numerical analysis of the unsteady flow past a Savonius wind turbine

Fernando, M. S. U. K.; Modi, V. J.

doi:10.1016/0167-6105(89)90005-6

Cited by 54 publications

(14 citation statements)

References 5 publications

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“…Therefore, many researchers have been analyzing Savonius wind turbines using general CFD software. Fujisawa [23] conducted a wind-turbine flow-field analysis and Modi [24] conducted a Savonius wind-turbine flow-field analysis by adapting the discrete vortex method. The power performance of the wind turbines was not presented in their studies.…”

Section: Introductionmentioning

confidence: 99%

Performance Prediction and Validation of a Small-Capacity Twisted Savonius Wind Turbine

et al. 2019

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In this study, an off-grid–type small wind turbine for street lighting was designed and analyzed. Its performance was predicted using a computational fluid dynamics model. The proposed wind turbine has two blades with a radius of 0.29 m and a height of 1.30 m. Ansys Fluent, a commercial computational fluid dynamics solver, was used to predict the performance, and the k-omega SST model was used as the turbulence model. The simulation result revealed a tip-speed ratio of 0.54 with a maximum power coefficient, or an aerodynamic rotor efficiency of 0.17. A wind turbine was installed at a measurement site to validate the simulation, and a performance test was used to measure the power production. To compare the simulation results obtained from the CFD simulation with the measured electrical power performance, the efficiencies of the generator and the controller were measured using a motor-generator testbed. Also, the control strategy of the controller was found from the field test and applied to the simulation results. Comparing the results of the numerical simulation with the experiment, the maximum power-production error at the same wind speed was found to be 4.32%.

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Section: Introductionmentioning

confidence: 99%

Performance Prediction and Validation of a Small-Capacity Twisted Savonius Wind Turbine

et al. 2019

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“…From these studies, the main flow patterns affecting the performance of the rotor are characterized. These complex flow characteristics make the theoretical prediction of the Savonius performance very difficult [9]. As alternatives, numerical predictions were performed as attempts to solve this issue [10].…”

Section: Introductionmentioning

confidence: 99%

Experimental studies on the effect of obstacle upstream of a Savonius wind turbine

et al. 2019

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The present studies investigate the performance of a small Savonius vertical axis wind turbine equipped with an upstream obstacle to guide the wind direction. The wind tunnel measurement was carried out in a test facility at the Mechanical Engineering Department, Institut Teknologi Sepuluh Nopember (ITS). The dynamic torque was measured using the brake dynamometer. Several variations of the obstacle orientations were investigated. Two different wind speeds of 2.48 m/s and 7.45 m/s were considered, that correspond to the Reynolds numbers of 30,000 and 90,000, respectively, according to the rotor diameter. It is found from the studies that the mechanical torque and power generated by the rotor are strongly affected by the obstacle. On the other hand, the Reynolds number has no significant impact on the rotor performance.

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“…More detailed measurements of the static and dynamic torque were performed by Ushiyama and Nagai in the 80's (Ushiyama and Nagai, 1988). More detailed numerical investigation of the performance of the Savonius wind turbine, based on the discrete vortex method, was performed by Fernando and Modi (1989).…”

Section: Introductionmentioning

confidence: 99%

CFD computation of the Savonius rotor

Rogowski¹,

Maroński²

2015

jtam

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In this paper, Computational Fluid Dynamics (CFD) analysis of a two-dimensional two-bucket Savonius rotor, using ANSYS Fluent solver, is presented. Computational methods of fluid dynamics are used to estimate the aerodynamic forces acting on the rotor, the torque and the power extracted by the Savonius rotor. In addition, an analysis of the results for different turbulence models is performed. Numerical investigations are compared with the experiment of the Sandia National Laboratories.

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A numerical analysis of the unsteady flow past a Savonius wind turbine

Cited by 54 publications

References 5 publications

Performance Prediction and Validation of a Small-Capacity Twisted Savonius Wind Turbine

Performance Prediction and Validation of a Small-Capacity Twisted Savonius Wind Turbine

Experimental studies on the effect of obstacle upstream of a Savonius wind turbine

CFD computation of the Savonius rotor

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