Aerodynamic Exploration on Rough Airfoil Based on Overlapping Feathers of a Swift-Wing Structure

To investigate the flow mechanism of feather-like rough airfoils based on swift wings, computational simulations were employed to explore their overall aerodynamic characteristics in comparison equivalent smooth airfoils. The study focused angles attack ranging from 0° 20° at low Reynolds numbers. results reveal that airfoil exhibits higher lift and lower drag compared moderate 6° 10°, resulting significantly improved efficiency. Notably, an angle 8°, efficiency is increased by 19%. However, smaller than 6°, increase outweighs lift, leading for airfoil. Conversely, when exceeds 16°, both experience separated flow-dominated fields, comparable effective shapes similar efficiencies. Furthermore, found increasing number greater pressure differences field, These preliminary conclusions are valuable elucidating flight mechanisms bird-feather-like wings can inform design or morphing bio-inspired micro aerial vehicles near future.