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Evaluation of a simple analytical model for offshore wind farm wake recovery by in situ data and Weather Research and Forecasting simulations

Platis, Andreas; Hundhausen, Marie; Mauz, Moritz; Siedersleben, Simon; Lampert, Astrid; Bärfuss, Konrad; Djath, Bughsin; Schulz‐Stellenfleth, Johannes; Canadillas, Beatriz; Neumann, Thomas; Emeis, Stefan; Bange, Jens

Abstract:
The recovery of offshore wind farm wakes in the German Bight was analyzed by a unique in situ data set, measured on‐board the research aircraft Dornier Do‐128 during the WIPAFF project in 2016 and 2017. These observations were used to validate a simple analytical wake recovery model in five case studies. The observed recovery rates were compared with the results of the mesoscale Weather Research and Forecasting (WRF) model. The airborne data show that the wake recovery can be described by an exponential function as expected by the analytical model and strengthens the hypothesis that the vertical downward moment flux has an important influence on the wake recovery. However, the predicted wake recovery rates (by the analytical model) do not always fully agree with the observations. Although, as a first‐order approximation, the model seems to perform well, further optimization has to be implemented to account for wind park layout, turbine induced turbulence, and horizontal momentum flux. WRF simulations reveal an exponential recovery, although the mesoscale model does not reproduce the correct atmospheric conditions for most of the cases. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124813
Veröffentlicht am 19.10.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1095-4244, 1099-1824
KITopen-ID: 1000124813
Erschienen in Wind energy
Seiten we.2568
Vorab online veröffentlicht am 22.09.2020
Nachgewiesen in Scopus
Web of Science
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