A two‐dimensional quantitative parametric investigation of simplified surface imperfections on the aerodynamic characteristics of a NACA 633‐418 airfoil

Emil Krog Kruse*, Niels N. Sørensen, Christian Bak

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The aerodynamic performance of a NACA 633‐418 airfoil has been analyzed with disturbances in approximately 1000 different configurations focused on the frontal 10% of the airfoil. The configuration parameters are based on field test samples and rain erosion test specimens. The most important trends are presented by 500 configurations each simulated for 6°, 8°, and 10° angle of attack. The simulations are performed with the DTU Wind Energy in‐house 2D CFD Reynolds‐averaged Navier–Stokes solver, EllipSys2D, combined with the eN transition model for the laminar‐turbulent boundary layer transition. The configurations are modeled by a direct geometrical modification of the airfoil shape. The results show that the most important parameters are the position and the depth/height of the disturbance, with up to 35% lift reduction and 90% lift/drag reduction within the specified angle of attacks and disturbance parameter ranges.
Original languageEnglish
JournalWind Energy
Number of pages13
ISSN1095-4244
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Airfoil
  • Leading edge roughness
  • LER
  • NACA 633-418

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