Experimental and numerical investigations on an airfoil with triangular- and star-shaped damage

Abstract

In this article, the aerodynamic performance of a full-span NACA 641-412 airfoil with inverse triangle, right triangle, and star shaped damage is experimentally investigated using balance measurements and flow visualization. Airfoil models with 100 mm chord sizes are used. Moreover, three shapes of damage, including right triangle, inverse triangle and star, with 100 mm chord size, are numerically investigated. Results show good qualitative and quantitative agreement, which is mostly due to the application of a full structured grid in the model. It is for the first time that good prediction of aerodynamic results is reported in such complex configurations; this fact is because of using multi-block structured mesh. Distribution of the pressure coefficient due to the damage shapes is also investigated in this article.