期刊
WIND ENERGY
卷 21, 期 9, 页码 732-744出版社
WILEY
DOI: 10.1002/we.2190
关键词
Adaptive Camber Concept; flow control; gust load alleviation; morphing wing; passive
资金
- German Research Foundation (DFG)
A new passive sectional approach to alleviate gust loads on wind turbinesthe Adaptive Camber Concept is introduced. The concept entails fluid-structure interaction, where flow conditions at the leading edge affect the airfoil shape and vice versa. A two-dimensional airfoil equipped with the Adaptive Camber Concept is experimentally investigated under steady and unsteady conditions in a wind tunnel. Under steady conditions, the adaptive camber airfoil de-cambers gradually with increasing angle of attack, yielding a lift curve with declined slope. Unsteady angle of attack fluctuations of various reduced frequencies are generated by means of an active grid. Under unsteady conditions, the adaptive camber airfoil is found to alleviate up to 60% of the fluctuating loads, while generating higher mean lift compared to a rigid reference airfoil.
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