However, the drag increases with the coarseness of the sandpaper. Almost the same reduction in maximum lift is seen for the different sandpaper types. In general, increasing zigzag tape heights reduce the maximum lift, whereas the increase in drag is less affected by the zigzag tape height. The airfoil was equipped with three heights of zigzag tape, a trip strip, three sandpaper types, and leading edge cavities with different modifications. The clean airfoil showed good agreement with results from other high‐quality wind tunnels. The airfoil was constructed with an exchangeable leading edge. N2 - The NACA 633‐418 airfoil has been tested in the new Poul la Cour Wind Tunnel at the Technical University of Denmark, Risø campus, to expand the publicly available data of airfoils with leading edge roughness.

T1 - Wind tunnel experiments on a NACA 633‐418 airfoil with different types of leading edge roughness A combination of sandpaper and cavities showed the largest reduction in maximum lift and the highest increase in drag.', The highest zigzag tape and coarsest sandpaper resulted in the highest penalty on the aerodynamics.

A combination of sandpaper and cavities showed the largest reduction in maximum lift and the highest increase in drag.Ībstract = 'The NACA 633‐418 airfoil has been tested in the new Poul la Cour Wind Tunnel at the Technical University of Denmark, Ris campus, to expand the publicly available data of airfoils with leading edge roughness. The NACA 63 3‐418 airfoil has been tested in the new Poul la Cour Wind Tunnel at the Technical University of Denmark, Risø campus, to expand the publicly available data of airfoils with leading edge roughness.

Airfoil types