Unsteady analysis on the instantaneous forces and moment arms acting on a novel Savonius-style wind turbine
| Autor: | Sukanta Roy, Antoine Ducoin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Tip-speed ratio
Engineering Lift coefficient Renewable Energy Sustainability and the Environment business.industry 020209 energy Energy Engineering and Power Technology 02 engineering and technology Mechanics Turbine Physics::Fluid Dynamics Lift (force) Fuel Technology Classical mechanics 020401 chemical engineering Nuclear Energy and Engineering Coefficient of moment Drag 0202 electrical engineering electronic engineering information engineering Pitching moment 0204 chemical engineering business Reynolds-averaged Navier–Stokes equations |
| Zdroj: | Energy Conversion and Management. 121:281-296 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2016.05.044 |
| Popis: | This paper aims to present a transient analysis on the forces acting on a novel two-bladed Savonius-style wind turbine. Two-dimensional unsteady Reynolds Averaged Navier Stokes equations are solved using shear stress transport k–ω turbulence model at a Reynolds number of 1.23 × 105. The instantaneous longitudinal drag and lateral lift forces acting on each of the blades and their acting points are calculated. The corresponding moment arms responsible for the torque generation are obtained. Further, the effect of tip speed ratio on the force coefficients, moment arms and overall turbine performances are observed. Throughout the paper, the obtained results for the new design are discussed with reference to conventional semi-circular design of Savonius turbines. A significant performance improvement is achieved with the new design due to its increased lift and moment arm contribution as compared to the conventional design. More interestingly, the present study sets a platform for future aerodynamic research and improvements for Savonius-style wind turbines. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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