The effective velocity model: An improved approach to velocity sampling in actuator line models

Claudia Muscari*, Paolo Schito, Axelle Viré, Alberto Zasso, Jan Willem van Wingerden

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Actuator line modeling of wind turbines requires the definition of a free-stream velocity in a computational mesh and a regularization kernel to project the computed body forces onto the domain. Both choices strongly influence the results. In this work, a novel velocity sampling method—the so-called effective velocity model (EVM)—is implemented in the CFD software SOWFA, validated, and compared to pre-existing approaches. Results show superior method robustness with respect to the regularization kernel width ((Formula presented.)) choice while preserving acceptable accuracy. In particular, the power predicted by the EVM is nearly independent of the (Formula presented.) value.

Original languageEnglish
Pages (from-to)447-462
Number of pages16
JournalWind Energy
Volume27
Issue number5
DOIs
Publication statusPublished - 2024

Funding

This work is part of the research programme “Robust closed‐loop wake steering for large densely spaced wind farms” with project number 17512, which is (partly) financed by the Dutch Research Council (NWO). We would also like to thank Tony Martínez‐Tossas from NREL for kindly providing the data necessary for the code comparison.

Keywords

  • actuator line model
  • CFD
  • LES
  • regularization kernel
  • velocity sampling
  • wind turbine modeling

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