Light detection and ranging measurements of wake dynamics. Part II: two-dimensional scanning

Juan-José Trujillo, Ferhat Bingöl, Gunner Chr. Larsen, Jakob Mann, Martin Kühn

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A nacelle-mounted lidar system pointing downstream has been used to measure wind turbine wake dynamics. The new measurement and data analysis techniques allow estimation of quasi-instantaneous wind fields in planes perpendicular to the rotor axis. A newly developed wake tracking procedure delivers the instantaneous transversal wake position which is quantitatively compared with the prediction of the Dynamic Wake Meandering model. The results, shown for two 10-min time series, suggest that the conjecture of the wake behaving as a passive tracer is a fair approximation; this corroborates and expands the results of one-dimensional measurements already presented in the first part of this paper. Consequently, it is now possible to separate the deterministic and turbulent parts of the wake wind field, thus enabling capturing the wake in the meandering frame of reference. The results correspond, qualitatively and to some extent quantitatively, to the expectations from CFD simulations which are compared in the paper. Copyright © 2010 John Wiley & Sons, Ltd.
    Original languageEnglish
    JournalWind Energy
    Volume14
    Issue number1
    Pages (from-to)61-75
    ISSN1095-4244
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Wind power meteorology
    • Wind Energy

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