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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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Wind farms operate in the atmospheric boundary layer and their performance is strongly dependent on the atmospheric conditions. We propose a simple model of the atmospheric boundary layer that can be used as an inflow model for wind farm simulations for isolating a number of atmospheric effects, namely, the change of wind direction with height and atmospheric boundary layer depth. In addition, the simple model is shown to be consistent with two similarity theories.
Preprints
https://doi.org/10.5194/wes-2020-130
https://doi.org/10.5194/wes-2020-130

  08 Jan 2021

08 Jan 2021

Review status: this preprint is currently under review for the journal WES.

A pressure-driven atmospheric boundary layer model satisfying Rossby- and Reynolds number similarity

Maarten Paul van der Laan, Mark Kelly, and Mads Baungaard Maarten Paul van der Laan et al.
  • DTU Wind Energy, Technical University of Denmark, Risø Campus, Frederiksborgvej 399, 4000 Roskilde, Denmark

Abstract. Idealized models of the atmospheric boundary layer (ABL) can be used to leverage understanding of the interaction between the ABL and wind farms, towards improvement of wind farm flow modelling. We propose a pressure-driven one-dimensional ABL model without wind veer, which can be used as an inflow model for three-dimensional wind farm simulations for isolating the effects of wind veer and ABL depth. The model is derived from the horizontal momentum equations, and follows both Rossby- and Reynolds number similarity; use of such similarity reduces computation time and allows rational comparison between different conditions. The proposed ABL model compares well with solutions of the mean momentum equations that include wind veer, if the forcing variable is employed as a free parameter.

Maarten Paul van der Laan et al.

Status: open (until 19 Feb 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Elegant ABL model for efficient computation of homogeneous inflow conditions', Javier Sanz Rodrigo, 26 Jan 2021 reply

Maarten Paul van der Laan et al.

Maarten Paul van der Laan et al.

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Short summary
Wind farms operate in the atmospheric boundary layer and their performance is strongly dependent on the atmospheric conditions. We propose a simple model of the atmospheric boundary layer that can be used as an inflow model for wind farm simulations for isolating a number of atmospheric effects, namely, the change of wind direction with height and atmospheric boundary layer depth. In addition, the simple model is shown to be consistent with two similarity theories.
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