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. The airfoil was constructed with an exchangeable leading edge. The clean airfoil showed good agreement with results from other high-quality wind tunnels. The airfoil was equipped with three heights of zigzag tape, a trip strip, three sandpaper types, and leading edge cavities with different modifications. In general, increasing zigzag tape heights reduce the maximum lift, whereas the increase in drag is less affected by the zigzag tape height. Almost the same reduction in maximum lift is seen for the different sandpaper types. However, the drag increases with the coarseness of the sandpaper. 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.

中文翻译：

---

NACA 633-418 翼型不同前缘粗糙度的风洞实验

NACA 63 ₃-418 翼型已在丹麦理工大学 Risø 校区的新 Poul la Cour 风洞中进行了测试，以扩展具有前缘粗糙度的翼型的公开数据。机翼构造有可更换的前缘。干净的翼型与其他高质量风洞的结果非常吻合。机翼配备了三种高度的锯齿形带、绊带、三种砂纸类型和具有不同修改的前缘腔。一般来说，增加锯齿带高度会降低最大升力，而阻力的增加受锯齿带高度的影响较小。对于不同的砂纸类型，可以看到几乎相同的最大升力降低。然而，阻力随着砂纸的粗糙度而增加。最高的锯齿形胶带和最粗糙的砂纸对空气动力学的影响最大。砂纸和空腔的组合显示出最大升力的最大减少和最大的阻力增加。