一种低噪风力发电机叶片

为克服现有风力发电机叶片存在无法兼顾气动效率提升和噪声污染的问题，本实用新型提供了一种低噪风力发电机叶片，包括叶片主体和襟翼，所述襟翼可调攻角地设置于所述叶片主体的尾缘，所述襟翼为具有吸声降噪功能的声学超材料。本实用新型提供的低噪风力发电机叶片能够提高低风速型风力发电机的气动效率，提高风力发电机的发电功率；同时，降低风力发电机运转的气动噪声的辐射水平，降低风力发电机运转发电对环境产生的噪声影响，提高低风速条件下的风电收益。

In order to solve the problem that an existing wind driven generator blade cannot give consideration to aerodynamic efficiency improvement and noise pollution, the utility model provides a low-noise wind driven generator blade which comprises a blade body and a flap, and the flap is arranged on the tail edge of the blade body in the mode that the attack angle can be adjusted. The flaps are made of acoustic metamaterials with sound absorption and noise reduction functions. According to the low-noise wind driven generator blade, the aerodynamic efficiency of a low-wind-speed type wind driven generator can be improved, and the generated power of the wind driven generator is improved; and meanwhile, the radiation level of aerodynamic noise during operation of the wind driven generator is reduced, the noise influence of operation power generation of the wind driven generator on the environment is reduced, and the wind power income under the low-wind-speed condition is improved.