Aeroacoustic noise prediction of a vertical axis wind turbine using large eddy simulation

This study investigates the numerical prediction for aerodynamic noise of vertical axis wind turbine using large eddy simulation and acoustic analogy. Low designs are required especially in residential areas, sound level generated by is therefore important to estimate. In this paper, incompressible flow field around 12 kW straight-bladed with rotor diameter 6.5 m solved, propagation calculated based on Ffowcs Williams Hawkings The pressure operating at high tip speed ratio predicted, it validated comparing measurement. measured spectra observed several azimuth angles show broadband characteristics, able reproduce shape these spectra. While previous works studying small-scaled turbines found that thickness dominant source, loading can be considered a main contribution total turbine. also indicates received higher when blade moves downwind than upwind side.