The sound propagation from a wind turbine situated on the top of a hill into the downwind domain is studied by numerical simulations for 13 cases with varying hill geometry and inflow conditions. The influence of the hill on the atmospheric flow and the wake due to the rotor are simulated by precursory large-eddy simulations. In addition to the combined consideration of hill and turbine wake effects, these effects are also separately evaluated. The results show that placing the turbine on top of a hill leads to slightly lower sound levels on the downwind plane, although the wake alone supports downward refraction and tends to increase the sound Impact near the ground at greater distance. Variations of the hill geometry and the inflow conditions do not have significant effects on the near-ground sound levels in the downwind domain.


    Access

    Download


    Export, share and cite



    Title :

    Sound propagation through the wake flow of a hilltop wind turbine—A numerical study


    Contributors:

    Published in:

    Wind Energy ; 21 ; 650-662


    Publication date :

    2018



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    3D-simulation of sound propagation through the wake of a wind turbine: Impact of the diurnal variability

    Heimann, Dietrich / Englberger, Antonia | German Aerospace Center (DLR) | 2018

    Free access

    Wind turbine wake aerodynamics

    Vermeer, L.J. | Online Contents | 2003


    Experimental and Numerical Survey in the Wake of a Wind Turbine

    Massouh, Fawaz / Dobrev, Ivan / Rapin, Marc | AIAA | 2007


    Flow Structures in the Turbulent Wake of a Cross Flow Wind Turbine

    Ramos Casado, Gemma / Beltrán, Víctor / Le Clainche, Soledad et al. | AIAA | 2018


    Aeroacoustic testing for sound propagation through turbine vanes

    Mumcu, Akif / Thouault, Nicolas / Seume, Jörg R. | AIAA | 2018