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Blar i Bergen Open Research Archive på forfatter "Nielsen, Finn Gunnar"

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    • Analysis of turbulence models fitted to site, and their impact on the response of a bottom-fixed wind turbine 

      Nybø, Astrid; Nielsen, Finn Gunnar; Godvik, Marte (Journal article; Peer reviewed, 2021)
      This study compares a wind field recommended by the wind turbine design standards to more realistic wind fields based on measurements. The widely used Mann spectral tensor model with inputs recommended by the standard, is ...
    • Development of an automatic thresholding method for wake meandering studies and its application to the data set from scanning wind lidar 

      Krutova, Maria; Paskyabi, Mostafa Bakhoday; Reuder, Joachim; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2022)
      Wake meandering studies require knowledge of the instantaneous wake evolution. Scanning lidar data are used to identify the wind flow behind offshore wind turbines but do not immediately reveal the wake edges and centerline. ...
    • The dynamic response of offshore wind turbines and their sensitivity to wind field models 

      Haaskjold Myrtvedt, Maylinn; Nybø, Astrid; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2020)
      As the rotor diameter of offshore wind turbines increases, an improved understanding of the structure of the turbulent wind field approaching the rotor is important. Present standards for computing wind loads are resting ...
    • Evaluation of different wind fields for the investigation of the dynamic response of offshore wind turbines 

      Nybø, Astrid; Nielsen, Finn Gunnar; Reuder, Joachim; Godvik, Marte; Churchfield, Matthew J. (Journal article; Peer reviewed, 2020)
      As the size of offshore wind turbines increases, a realistic representation of the spatiotemporal distribution of the incident wind field becomes crucial for modeling the dynamic response of the turbine. The International ...
    • Evaluation of Gaussian wake models under different atmospheric stability conditions: Comparison with large eddy simulation results 

      Krutova, Maria; Bakhoday Paskyabi, Mostafa; Reuder, Joachim; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2020)
      The calculation of the velocity deficit in the wake of individual wind turbines is a fundamental part of the wind farm analysis. A good approximation of the wake deficit behind a single wind turbine will improve the power ...
    • On Stochastic Reduced-Order and LES-based Models of Offshore Wind Turbine Wakes 

      Bakhoday Paskyabi, Mostafa; Krutova, Maria; Nielsen, Finn Gunnar; Reuder, Joachim; Guernaoui, O. EL. (Journal article; Peer reviewed, 2020)
      In this paper, the primary objective is to investigate flow structures in the wake of wind turbines based on applying a truncated Proper Orthogonal Decomposition (POD) approach. This scheme decomposes the three-dimensional ...
    • Processing of sonic anemometer measurements for offshore wind turbine applications 

      Nybø, Astrid; Nielsen, Finn Gunnar; Reuder, Joachim (Peer reviewed; Journal article, 2019)
      Quality assured measurements from offshore masts may provide valuable information of the characteristics of the offshore wind field, which is of high relevance for simulations of offshore wind turbines' dynamic response. ...
    • Quasi-static response of a bottom-fixed wind turbine subject to various incident wind fields 

      Nybø, Astrid; Nielsen, Finn Gunnar; Godvik, Marte (Journal article; Peer reviewed, 2021)
      In the design of offshore wind farms the simulated dynamic response of the wind turbine structure includes loading from turbulent wind. The International Electrotechnical Commission (IEC) standard for wind turbine design ...
    • Sensitivity of the dynamic response of a multimegawatt floating wind turbine to the choice of turbulence model 

      Nybø, Astrid; Nielsen, Finn Gunnar; Godvik, Marte (Journal article; Peer reviewed, 2022)
      In the design of offshore wind turbines, it is important to make a realistic estimate of the wind load. This is particularly important for floating wind turbines, having natural frequencies in a frequency range where the ...

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