Validation of Blade-Resolved Computational Fluid Dynamics for a MW-Scale Turbine Rotor in Atmospheric Flow: Article No. 052049

Christian Grinderslev, Ganesh Vijayakumar, Shreyas Ananthan, Niels Sorensen, Frederik Zahle, Michael Sprague

Research output: Contribution to journalArticlepeer-review

9 Scopus Citations

Abstract

In this study, simulation results of two different computational fluid dynamics codes, Nalu-Wind and EllipSys3D, are presented for a wind turbine rotor in complex yawed and sheared inflow. The results are compared to measurements from the DanAero experiments, to validate computed pressures and azimuthal trends. Despite different code methodologies and grid setups, the codes agree well in computed pressures and integrated forces along the blade for all blade azimuthal positions, however with some discrepancy in the very yawed case. Additionally, both codes capture well the azimuthal trends and force levels seen in measurements. Investigation into discrepancies shows that expanding grids before the rotor, lead to smearing of the wind profiles, which is likely the main cause of the differences in the results between the codes. Additionally, omission of the ground constraint cause discrepancies in relative velocity seen by the passing blade, due to an over speeding beneath the rotor.
Original languageAmerican English
Number of pages10
JournalJournal of Physics: Conference Series
Volume1618
DOIs
StatePublished - 2020

NREL Publication Number

  • NREL/JA-5000-77985

Keywords

  • blade resolved
  • CFD
  • Nalu-wind
  • RANS
  • validation
  • wind turbines

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