Unsteady Aerodynamic Design of a Flapping Wing Combined with a Bionic Wavy Leading Edge

Based on the bionic design of humpback whale fin, a passive flow control method is proposed to obtain greater flapping lift by applying wavy leading edge structure straight symmetrical wing. The conventional wing replaced shape represented regular trigonometric function form special configuration imitating fin. dynamic aerodynamic performance and field characteristics with different parameters are compared analyzed CFD numerical simulation. simulation results show that changes baseline reduces pressure upper surface during process downward flapping, thereby increasing difference between lower surfaces lift. sensitivity analysis shows in order maximum coefficient while losing least thrust, smaller amplitude should be selected premise selecting wavelength. Among configurations calculated this paper, optimal increases time average 32.86% decreases thrust 14.28%. Compared wing, it has better low-speed flight can withstand take-off weight.