Research on Aerodynamic Characteristics of Bionic Flapping-wing Aircraft Based on Fluid-solid Coupling

Abstract

Wings are an important part of the structure of flapping aircraft. Through the simulation of the flexible wing, its aerodynamic performance is studied. Applying the FSI technology and using the WORKBENCH software, the changes of lift and drag of the rigid wing and the flexible wing under the motion of two degrees of freedom, and the aerodynamic performance of the flexible wing under different frequencies are calculated. The research results show that: when the incoming flow velocity is 11m/s, the flapping angle is 45°, and the twist angle is 10°, the peak value of the lift coefficient of the flexible wing is significantly larger than that of the rigid wing, and it can generate greater thrust; At different frequencies, the maximum lift-to-drag ratio is generated at 10Hz. The results can provide reference for improving the flight performance of flapping-wing aircraft.