Unsteady Flow Simulation and Dynamic Stall Behaviour of Vertical Axis Wind Turbine Blades
| Autor: | Kenichi Hamada, Ning Qin, Tomos Smith, Robert Howell, Naveed Durrani |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Vertical axis wind turbine
Engineering Wind power Computer simulation Renewable Energy Sustainability and the Environment business.industry Energy Engineering and Power Technology Near and far field Stall (fluid mechanics) Mechanics Turbine Aerospace engineering business Wells turbine Darrieus wind turbine |
| Zdroj: | Wind Engineering. 35:511-527 |
| ISSN: | 2048-402X 0309-524X |
| Popis: | This paper presents a computational study of a rooftop size vertical axis wind turbine with straight blades (H-type turbine). The computational model solves for the two-dimensional and three-dimensional unsteady flow fields around the turbine based on the unsteady Reynolds averaged Navier-Stokes equations and a sliding mesh technique to connect the far-field fixed mesh to the near field rotating mesh around the rotor. Interesting flow features such as dynamic stall around the blades and the interaction of the blade wakes with the following blades are illuminated. Comparison of the 2D and 3D simulations highlight strong three dimensional effects, including the blade tip losses and the effects of the blade supporting shaft and arms. These effects significantly degrade the performance of the VAWT under investigation, pointing a way for improving VAWT designs. |
| Databáze: | OpenAIRE |
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