![]() Force coefficients of the designed airfoil were obtained using the panel code XFOIL in which the boundary layer/inviscid flow coupling is ineracted via surface transpiration model. The airfoil family was designed using a evolutionary algorithm based optimization tool with different objectives, both aerodynamic and structural, coupled with an airfoil geometry generation tool. The new airfoil family was designed in collaboration with CENER (Spanish National Renewable Energy Centre). Consequently, the airfoils presented in this work are designed for high Reynolds numbers with the main goal of reducing blade loads and mantainig power production. Large offshore wind turbines suffer high extreme loads due to their size, in addition the lack of noise restrictions allow higher tip speeds. The project included the design of a wind turbine airfoil family especially conceived for large offshore wind turbine blades, in the order of 5MW machine. The project was managed by ACCIONA Energia and the wind turbine technology was designed by ACCIONA Windpower. The EOLIA project 2007-2010 (Spanish Goverment funded project) was focused on the design of large offshore wind turbines for deep waters. Wind turbine blades size has scaled-up during last years due to wind turbine platform increase especially for offshore applications. Airfoil family design for large offshore wind turbine blades
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