Response Time Reduction with Porosity: A Study on Flow Separation Control*

Porous structures have significant potential for enhancing the performance of various aerodynamic applications. This study explores the impact of porous surfaces on wings subjected to unsteady flows generated by wing motion and active flow control actuation. Both experimental methods and numerical simulations are utilized. Wind tunnel experiments were performed on a nominally 2-D wing undergoing unsteady motion with plasma actuators, and a corresponding 2-D Direct Numerical Simulation (DNS) was conducted. The analysis focuses on comparing aerodynamic loads, including lift, drag, and pitching moment, between wings with and without porous surfaces. Additionally, flow field analysis is carried out to examine the flow characteristics, offering insights for future wing designs incorporating porous surfaces.