Airfoil Roof in Buildings

In this paper an airfoil that is used on roofs was analyzed: Circular Arc Airfoil. The JavaFoil program for the calculation of aerodynamic parameters of the simulated wing airfoil and small AR (aspect ratio) was used. A wing roof scale model was constructed, and it was tested in the wind tunnel of the Laboratory of Environmental Fluid Dynamics, Universidad NacionaldelComahue. In the model, the AR was equal to 1.46. Thickness of the model was 32%. The tests were conducted at a Reynolds number of 1×10⁵. The curves of the lift coefficient versus angle of attack were obtained, and the pressure coefficient Cp was determined for each surface. The lift coefficients and the Cp values differ from the theoretical profile; this shows the importance of using the wind tunnel to obtain experimental data to achieve a good structural design.