Aerodynamic Exploration for Tandem Wings with Smooth or Corrugated Surfaces at Low Reynolds Number

Skin corrugation and tandem configuration are two distinct features that characterize the flow around dragonfly wings. In contrast to smooth airfoil single pair of wings conventional airplanes, corrugated surfaces influence aerodynamics both locally globally. this article, several kinds doubly- wing configurations were designed, then computational investigations based on wind tunnel experiments conducted investigate aerodynamic characteristics these models. Computational simulations using in-house codes carried out with a freestream velocity 20 m/s at an angle attack from −4° 16°. Based results, effects thickness, surface waviness hindwing decalage compared presented quantitatively. Final results demonstrate could eliminate separation close trailing edge angles 8°~10°, or delay greater than 10°. Thus, efficiency provide significant improvement wing. The greatest percentage for thick is 1376% 0°. Surface will stall lower attack, but gain some benefit standing separated flow. Hindwing has obvious lift enhancement configuration. Therefore, it concluded attractive promising MAVs flexible structures in near future.