Material optimization of flexible blades for wind turbines
| Autor: | Benjamin Thiria, S. Courrech du Pont, V. Cognet |
|---|---|
| Přispěvatelé: | Physique et mécanique des milieux hétérogenes (UMR 7636) (PMMH), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Université de Paris (UP), CNRS UMR 7057 - Laboratoire Matières et Systèmes Complexes (MSC) (MSC), Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
020209 energy
FOS: Physical sciences Applied Physics (physics.app-ph) 02 engineering and technology 7. Clean energy Turbine Wind speed Physics::Fluid Dynamics [SPI]Engineering Sciences [physics] Pitch control 0202 electrical engineering electronic engineering information engineering 0601 history and archaeology Mathematics Cauchy number Wind power 060102 archaeology Renewable Energy Sustainability and the Environment business.industry Fluid Dynamics (physics.flu-dyn) Physics - Applied Physics Physics - Fluid Dynamics 06 humanities and the arts Mechanics Aerodynamics Torsion spring Momentum theory business |
| Zdroj: | Renewable Energy Renewable Energy, Elsevier, 2020, 160, pp.1373-1384. ⟨10.1016/j.renene.2020.05.188⟩ |
| ISSN: | 0960-1481 1879-0682 |
| DOI: | 10.1016/j.renene.2020.05.188⟩ |
| Popis: | Bioinspired flexible blades have been recently shown to significantly improve the versatility of horizontal-axis wind turbines, by widening their working range and increasing their efficiency. The aerodynamic and centrifugal forces bend the blade along its chord, varying the pitch angle by means of non-consuming mechanisms. Here we introduce a general method based on a universal scaling, which finds the optimal soft materials for the blades to maximize the overall turbine efficiency or rotational power, for any required geometry of classical horizontal-axis turbines. The optimization problem, which depends on various parameters, such as the wind velocity, the rotation rate, the density, the rigidity and the geometry of the blade, is reduced to only two dimensionless parameters: the Cauchy number and the centrifugal number. The blade-element momentum theory is coupled to a torsion spring-based model for the blade deformation. Taking into account realistic incoming wind-velocity distributions in the North Sea and a large wind-turbine geometry, we found a significant increase of the total harvested power, up to +35%. In addition, the optimal soft material corresponding to the maximal efficiency over the entire working range for a given wind turbine geometry is, within the limits of small blade deformations, scale-independent. Thus experiments on small wind turbines are a possible way to determine the optimal soft materials for larger ones. These flexible blades are found to be between 5% and 20% lighter than the current rigid blades. Comment: 15 pages, 9 figures |
| Databáze: | OpenAIRE |
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