Micro- and meso-scale effects of forested terrain

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    Abstract

    The height and rotor diameter of modern wind turbines are so extensive, that the wind conditions they encounter often are well above the surface layer, where traditionally it is assumed that wind direction and turbulent fluxes are constant with respect to height, if the surface is homogenous. Deviations from the requirement of homogeneity are often the focus of micro-scale studies in forested areas. Yet, to explain the wind climate in the relevant height range for turbines, it is necessary to also account for the length scales that are important parameters for the meso-scale flow. These length scales are the height of the planetary boundary layer and the Monin-Obukhov length, which both are related to the energy balance of the surface. Examples of important micro- and meso-scale effects of forested terrain are shown using data and model results from recent and ongoing experiments. For micro-scale modeling, the issue of model resolution is discussed.
    Original languageEnglish
    Title of host publicationProceedings
    PublisherEuropean Wind Energy Association (EWEA)
    Publication date2011
    Publication statusPublished - 2011
    EventEWEA Annual Event 2011 - Brussels, Belgium
    Duration: 14 Mar 201117 Mar 2011
    http://www.ewec2011.info/

    Conference

    ConferenceEWEA Annual Event 2011
    CountryBelgium
    CityBrussels
    Period14/03/201117/03/2011
    Internet address

    Keywords

    • Aeroelastic design methods

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