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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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Discussion papers
https://doi.org/10.5194/wes-2019-67
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2019-67
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: brief communication 10 Oct 2019

Submitted as: brief communication | 10 Oct 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Wind Energy Science (WES).

Brief communication: A fast vortex-based smearing correction for the actuator line

Alexander R. Meyer Forsting, Georg R. Pirrung, and Néstor Ramos-García Alexander R. Meyer Forsting et al.
  • DTU Wind Energy, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark

Abstract. The actuator line is a lifting line representation of aerodynamic surfaces in computational fluid dynamics applications, but with non-singular forces which reduces the self-induced velocities at the line. The vortex-based correction by Meyer Forsting et al. (2019) et al. recovers this missing induction and thus the intended lifting line behaviour of the actuator line. However, its computational cost exceeds that of existing tip corrections and quickly grows with blade discretization. Here we present different methods for reducing its computational cost to the level of existing corrections without jeopardising the stability or accuracy of the original method. The cost is reduced by at least 98 % whereas the power is maximally affected by 0.8 % with respect to the original formulation.

Alexander R. Meyer Forsting et al.
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Status: open (until 13 Dec 2019)
Status: open (until 13 Dec 2019)
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Alexander R. Meyer Forsting et al.
Model code and software

Actuator-Line-Smearing-Correction A. R. Meyer Forsting, G. R. Pirrung, and N. Ramos-García https://doi.org/10.11583/DTU.9752285.v1

Alexander R. Meyer Forsting et al.
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Latest update: 22 Nov 2019
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Simulations of wind farms, allows estimating the forces acting on the turbines and thus their life time and power production. Representing the actual geometric shape of turbines in a realistic atmospheric flow is computationally expensive and therefore they are modeled in a simplified manner. Unfortunately, these simplifications negatively impact the estimated forces. We developed an open-source aerodynamic model that corrects the forces, giving more accurate estimates for life-time and power.
Simulations of wind farms, allows estimating the forces acting on the turbines and thus their...
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