Numerical simulation of aerodynamic performance of an airfoil combined lift and drag

An airfoil which can establish flow tunnel is simulated in this study. Y-type flow tunnel is opened inside the airfoil which can produce lift and drag to drive itself under different wind speed and different wind angle. Selecting the NACA low-speed airfoil as standard airfoil and using fluent method, the influence on aerodynamic characteristics can be analyzed according to the results. In this paper, two airfoils are simulated under 3m/s and 8m/s of wind speed, wind angle area 15° to 45° and 150° to 180 ° respectively. The results of simulation show that the areodynamic characteristic of airfoil combined lift and drag is similar to the standard airfoil under the low wind speed up, thus, the airfoil combined lift and drag keeps the characteristic of providing lift; Under the high wind speed, the airflow ejected from Y-type flow tunnel, the thrust reversal is generated; At a specific wind angle area, the airfoil can be driven by the lift and drag. According to the results of simulation, suggestions on the optimization of the wing combined lift and drag are proposed.