Invention Application
US20120057987A1 WIND TURBINE BLADE WITH BASE PART HAVING NON-POSITIVE CAMBER 有权
风力涡轮叶片与非积极的CAMBER的基座部分

WIND TURBINE BLADE WITH BASE PART HAVING NON-POSITIVE CAMBER
Abstract:
A blade, for a rotor of a wind turbine has a profiled contour in a radial direction is divided into a root region with a substantially circular or elliptical profile closest to the hub and an airfoil region with a lift generating profile furthest away from the hub. A transition region between the root region and the airfoil region has a profile gradually changing in the radial direction from the circular or elliptical profile of the root region to the lift generating profile of the airfoil region, and the airfoil region comprises at least a first longitudinal segment extending at least 20% of a longitudinal extent of the airfoil region. The first longitudinal segment has a first base part with a cross-sectional profile such that, when impacted by an incident airflow at an angle of attack of 0 degrees has a lift coefficient, which is 0 or less.
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