SUB-BLADE STRUCTURE FOR REDUCING BLADE WEIGHT IN WIND TURBINES

摘要

The invention relates to a sub-blade structure which can be used to reduce the weight of the blades in horizontal-axis wind turbines, whereby the blade is divided into blades having a smaller section (sub-blades). According to the invention, links are spaced out along the length of the sub-blades, such as to form a structure with a significant increase in the moment of inertia-to-weight ratio. The specific aerodynamic profile and division of each sub-blade enables the blade to be designed aerodynamically with more degrees of freedom. Said structures are particularly suitable for large wind turbines.