It is well known that noise reduction and control by design is the most effective and cost saving solution. An integrated wind turbine rotor simulation and analysis tool is required with a validated simulation process which includes both rotor aerodynamics and aero-acoustic modeling capabilities. This process can be utilized to perform turbine optimization through advanced rotor design and control. A literature review of wind turbine aero-acoustic studies with an evaluation of available approaches for simulating wind turbine aero-acoustics in the time domain and frequency domain has been conducted. The key noise generation mechanisms including airfoil, rotating blade and rotor noise have been evaluated. A strategy for an integrated wind turbine modeling including VTS (Vestas Turbine Simulation)/CFD/CAA (Computational Aero-Acoustics) utilizes the state-of-art computational modeling to model the rotor aero-acoustics has been laid out here. For the first time, the far-field aero-acoustic wind turbine noise signal at the microphone location specified was simulated which including blade tower interaction and atmospheric turbulence. This simulated noise is being compared and validated with available test data. The initial parametric study including rotor rpm, tilt, swept blade tip, shear flow and atmospheric turbulence have been evaluated to identify the key noise generation mechanisms.
展开▼
