large-scaled blade has posed many problems related to design and production. After introducing the features ofblade with thick airfoils and flatback, based on relevant parameters of Huaren 100 kW wind turbine, the paper designedblade with thick airfoils and flatback, introduced blade parameter design, and analyzed the aerodynamic performance ofblades using GH bladed software, obtaining the relationship between power output of wind turbine with blade tip speedratio Cp. Furthermore, it analyzed the aerodynamic performance of original design blades, modified blades and Huaren100 kW blades, and assessed the aerodynamic performance of modified blade.
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