Preprints
https://doi.org/10.5194/wes-2023-16
https://doi.org/10.5194/wes-2023-16
03 May 2023
 | 03 May 2023
Status: a revised version of this preprint was accepted for the journal WES and is expected to appear here in due course.

An Actuator Sector Model for Wind Power Applications: A Parametric Study

Mohammad Mehdi Mohammadi, Hugo Olivares-Espinosa, Gonzalo Pablo Navarro Diaz, and Stefan Ivanell

Abstract. This paper investigates different actuator sector model implementation alternatives and how they compare to actuator line results. The velocity sampling method, tip correction, and time step are considered. A good agreement is seen between the line and sector model in the rotor plane and the wake flow. Using the sector model, it was possible to reduce the computational time by 75 % compared to actuator line model as it is possible to run the simulation with a larger time step without compromising the accuracy considerably. The results suggest that the proposed velocity sampling method produces the closest results to the line model with different tip speed ratios. Moreover, the vortex-based tip correction applied to the sector model results in the lowest error values, among the considered methods, to correct the radial load distributions. Also, it is seen that reducing the time step compared to the one used for actuator disk/sector does not provide an advantage considering the increased computational time.

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Mohammad Mehdi Mohammadi, Hugo Olivares-Espinosa, Gonzalo Pablo Navarro Diaz, and Stefan Ivanell

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2023-16', Anonymous Referee #1, 21 Jun 2023
  • RC2: 'Comment on wes-2023-16', Anonymous Referee #2, 01 Aug 2023
  • AC1: 'Comment on wes-2023-16, Final response', Mohammad Mehdi Mohammadi, 14 Sep 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on wes-2023-16', Anonymous Referee #1, 21 Jun 2023
  • RC2: 'Comment on wes-2023-16', Anonymous Referee #2, 01 Aug 2023
  • AC1: 'Comment on wes-2023-16, Final response', Mohammad Mehdi Mohammadi, 14 Sep 2023
Mohammad Mehdi Mohammadi, Hugo Olivares-Espinosa, Gonzalo Pablo Navarro Diaz, and Stefan Ivanell
Mohammad Mehdi Mohammadi, Hugo Olivares-Espinosa, Gonzalo Pablo Navarro Diaz, and Stefan Ivanell

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Short summary
This paper has put forward a set of recommendations regarding the actuator sector model implementation details to improve the capability of the model to reproduce similar results compared to those obtained by an actuator line model which is one of the most common ways used for numerical simulations of wind farms while providing significant computational savings. This includes among others the velocity sampling method and a correction of the sampled velocities to calculate the blade forces.
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