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Ultralight Wind Turbine
We have developed a novel wind turbine that overcomes the solidity limitation of conventional designs, by opening the center of the rotor which allows to increase the number of blades without incurring loss of efficiency. According to our design, it is possible to increase solidity up to 0.25 (the recommended limit for three-bladed rotor is 0.1). Another important characteristic of our design is that the blades have a wing profile and twist, which is a function of the angle beta (between plane of rotation and chord at blade tip). The blades have a length equal to one/third of radius, which means that the inner opening amounts to one half of the complete circle. The set of blades are mounted between two rings that, besides serving as mechanical support, serve the aerodynamic function of winglets, to reduce loss of lift at the blade (both inner and outer) tips.
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