Aerodynamics and aeroacoustics of horizontal axis wind turbines

The aerodynamic and aeroacoustic behavior of wind turbines presents spe­cial characteristics which make their prediction a significant research subject. The rotor design is directly influenced by the aerodynamic analysis and the complexity of the rotor flow field. The understanding of the noise source mech­anisms, depending on the rotor aerodynamic parameters and the operating conditions is very important for a wide range of the rotor’s frequency spectrum. Thus, the noise prediction of a wind turbine is a challenging matter similar to other complicated aeroacoustic problems such as helicopter or propeller noise.