Employing large Horizontal Axis Wind Turbines, HAWTs, is inevitable for increasing the wind power generation per turbine unit, i.e. reducing the cost of wind energy production. The consequences of large HWATs application are considerable aeroelastic blade deformation and high levels of aeroacoustic noise generation. In this paper, considering the aeroelastic effects, aeroacoustic calculation of a MW class HAWT is performed by implementing a transient two-way partitioned Fluid-Solid Interaction (FSI) technique. The CFD-FEM and structural modeling are validated using AOC 50/15 HAWT experimental data. Aerodynamic and aeroacoustic simulations of WP_Baseline 1.5 MW HAWT are conducted. The results show the power amount and the noise level generated by the flexible blades are about 2.7% and 0.74 dB less than those generated by the rigid blades.
