Experimental and Numerical Study of the Aerodynamic Characteristics of an Archimedes Spiral Wind Turbine Blade
| Autor: | Rinus Mieremet, Qian Lu, Kyung Chun Kim, Ho Seong Ji, Yoon Kee Kim, Joon Ho Baek |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Engineering
Control and Optimization Turbine blade Energy Engineering and Power Technology Computational fluid dynamics Wake Turbine lcsh:Technology Wind speed Archimedes spiral wind blade law.invention jel:Q40 Physics::Fluid Dynamics tip vortex unsteady analysis law jel:Q jel:Q43 jel:Q42 particle image velocimetry jel:Q41 wake computational fluid dynamics (CFD) jel:Q48 jel:Q47 Electrical and Electronic Engineering Aerospace engineering Engineering (miscellaneous) jel:Q49 Renewable Energy Sustainability and the Environment business.industry lcsh:T Rotational speed jel:Q0 Aerodynamics Mechanics Physics::Classical Physics jel:Q4 Particle image velocimetry business Energy (miscellaneous) |
| Zdroj: | Energies, Vol 7, Iss 12, Pp 7893-7914 (2014) ENERGIES(7): 12 Energies Volume 7 Issue 12 Pages 7893-7914 |
| ISSN: | 1996-1073 |
| Popis: | A new type of horizontal axis wind turbine adopting the Archimedes spiral blade is introduced for urban-use. Based on the angular momentum conservation law, the design formula for the blade was derived using a variety of shape factors. The aerodynamic characteristics and performance of the designed Archimedes wind turbine were examined using computational fluid dynamics (CFD) simulations. The CFD simulations showed that the new type of wind turbine produced a power coefficient (C p ) of approximately 0.25, which is relatively high compared to other types of urban-usage wind turbines. To validate the CFD results, experimental studies were carried out using a scaled-down model. The instantaneous velocity fields were measured using the two-dimensional particle image velocimetry (PIV) method in the near field of the blade. The PIV measurements revealed the presence of dominant vortical structures downstream the hub and near the blade tip. The interaction between the wake flow at the rotor downstream and the induced velocity due to the tip vortices were strongly affected by the wind speed and resulting rotational speed of the blade. The mean velocity profiles were compared with those predicted by the steady state and unsteady state CFD simulations. The unsteady CFD simulation agreed better with those of the PIV experiments than the steady state CFD simulations. |
| Databáze: | OpenAIRE |
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