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发明公开
CN106460800A 具有降噪装置的转子叶片 审中-实审 转让

具有降噪装置的转子叶片
摘要：
本发明涉及一种用于风力涡轮机的转子叶片（20）。所述转子叶片（20）包括压力侧（251）、吸力侧（252）、具有前缘（241）的前缘部段（24）和具有后缘（231）的后缘部段（23）。气流（31）沿所述转子叶片的表面（32）从所述前缘部段（24）流动到所述后缘部段（23），并且靠近所述转子叶片的表面（32）建立边界层（33）。所述转子叶片（20）包括降噪装置（40），其用于减少由所述气流（31）和所述转子叶片（20）的相互作用所产生的噪声。所述降噪装置（40）位于所述转子叶片的边界层33）内。所述降噪装置（40）包括覆盖件（41）和用于将所述覆盖件（41）连接到所述转子叶片的表面（32）的连接装置（42）。所述覆盖件（41）至少跨越所述转子叶片的表面（32）的一部分。所述覆盖件（41）位于所述转子叶片的表面（32）的预定距离（43）处。所述覆盖件（41）是多孔的，其开放区域比率在30％和95％之间，特别是在55％和85％之间。
摘要（英）：

The invention relates to a rotor blade (20) for a wind turbine. The rotor blade (20) comprises a pressure side (251), a suction side (252), a leading edge section (24) with a leading edge (241), and a trailing edge section (23) with a trailing edge (231). An airflow (31) flows along the surface (32) of the rotor blade from the leading edge section (24) to the trailing edge section (23) and builds up a boundary layer (33) in close proximity to the surface (32) of the rotor blade. The rotor blade (20) comprises a noise reduction means (40) for reducing noise which is generated by interaction of the airflow (31) and the rotor blade (20). The noise reduction means (40) is located within the boundary layer (33) of the rotor blade. The noise reduction means (40) comprises a cover (41) and connection means (42) for connecting the cover (41) to the surface (32) of the rotor blade. The cover (41) spans at least over a part of the surface (32) of the rotor blade. The cover (41) is located at a predetermined distance (43) of the surface (32) of the rotor blade. The cover (41) is porous with an open area fraction between 30 percent and 95 percent, in particular between 55 percent and 85 percent.

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