Fluid-structure interaction of a bio-inspired passively deployable flap for lift enhancement

Covert-feathers-inspired passive flow control is beneficial for aerodynamic performance at post-stall angles of attack. However, most studies model covert feathers as a rigidly attached or freely moving flap on wing. The mounted via torsional spring, emblematic to the finite stiffness bird feathers, has remained unexplored. We simulate strongly coupled fluid-structure interactions past stationary airfoil with passively deployable, torsionally suction surface. then perform parametric study and an in-depth analysis dominant features that affect performance.