Schall_KoGe - A Project on acoustics of wind turbine noise in complex terrain

Abstract

This article presents the main results of the project. Starting with analysis of measured input data for the different models (wind field, aeroacoustic, sound propagation model) a workflow and useful interfaces were developed to connect the models between each other. E.g propagation conditions were classified, which allows the comparison of measurement results and model calculations. The source parameterization of the wind turbine was extensively examined so that a simplified yet realistic noise forecast is possible. Here we found that the source directivity is more important than the source location within the rotor space. The influence of terrain and flow was studied to explain immission variations of noise. Finally, a scientific model was compared with conventional calculation methods and the differences are presented.