احمدرضا کهنسال

This research examines the aerodynamic performance of wavy (corrugated) airfoils, focusing on the effects of two angles of attack: the airfoil’s and the tail’s (𝛽). Simulations used the W1011 airfoil at a Reynolds number of 200 000, with airfoil angles of 0◦, 2◦, 5◦, and 8◦, and tail angles of 0◦, 10◦, 20◦, 30◦, and 40◦. Results were validated against experimental data from Williamson’s lab. Findings show a notable lift coefficient increase, especially at higher flap angles. At 𝛽 = 40◦ and 0◦ airfoil angle, lift was nearly three times greater than other cases. While drag also increased, it was less significant, indicating better aerodynamic efficiency. The lift-to-drag ratio improved notably at lower attack angles but declined slightly at higher angles due to turbulence and low-pressure zones. Overall, wavy airfoils with larger tail angles provide aerodynamic advantages, especially at low angles of attack, enhancing lift and fuel efficiency in aviation and marine contexts.