| 摘要 |
Wind turbine blade (10) which comprises a root area (13), an enclosure (20) inside the blade at the root area, and means for draining off water that condensates inside the blade. The draining means comprise four bores (30) formed on the surface of the blade at the root area, two at one side of the enclosure and two at the other side; as for their angular position on the surface of the blade, two bores are located on the suction side of the blade and two other bores are located on the pressure side of the blade. The bores (30) are provided with a protrusion (35) protruding outwards from the outer surface of the blade, so that water flowing down the outer surface of the blade is prevented from entering the blade. |
