Morphing blades for tidal turbines: A theoretical study
Morphing blades for tidal turbines: A theoretical study
复制标题
潮汐涡轮机变形叶片:理论研究
DOI:
10.1016/j.renene.2021.10.085
复制
发表时间:
2022
期刊:
影响因子:
8.7
通讯作者:
Pisetta G
中科院分区:
文献类型:
--
作者:
Pisetta G
Tidal energy has the potential to significantly contribute to energy security by providing predictable renewable energy.New technology is needed to decrease the levelised cost of energy and to make this energy sector competitive in the energy market. A key area where technology can contribute to decrease costs is mitigating the hydrodynamic load fluctuations, and thus increasing the fatigue life of the turbine.Here, we formulate a passive morphing blade concept that aims to mitigate the unsteady thrust without affecting the mean torque and thus the harvested power.We show that a blade with a trailing edge that deflects perfectly elastically can suppress virtually all fluctuations without varying the mean loads. The effect of the hydrodynamic and blade's inertia, the material damping, and the radial shear stress, decrease the performances.Using a low-order model of the blade, we show that when a gust occurs, the angle of attack experienced by a rigid blade increases, whilst that experienced by a well-designed morphing blade decreases. This counter-intuitive mechanism is what makes morphing blades highly effective. While blades that could passively twist have previously been developed, this theoretical study suggests that chordwise flexibility is a suitable alternative that should be further explored.
登录
查看更多内容
DOI:
10.2514/6.2018-3090
发表时间:
2018
期刊:
2018 Fluid Dynamics Conference
影响因子:
--
作者:
A. Medina;Maziar S. Hemati;Matthew Rockwood
通讯作者:
Matthew Rockwood
影响因子:
8.7
作者:
Gabriel Thomas Scarlett;I. M. Viola
通讯作者:
Gabriel Thomas Scarlett;I. M. Viola
影响因子:
8.7
作者:
H. Díaz;J. M. Rodrigues;Carlos Soares
通讯作者:
Carlos Soares
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
W. Sheng;R. Galbraith;F. Coton
通讯作者:
F. Coton
影响因子:
8.7
作者:
Scarlett G
通讯作者:
Scarlett G