Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : June 05, 2019 - June 08, 2019
Birds with flexible feathers have achieved stable flight under unpredictable disturbances. In this study, aiming at enhancing the robustness of the drones, the effect of the deflection of flexible feather models attached to the rigid wings on the robustness of the wing in disturbances is investigated experimentally. The bird-inspired wing models with flexible feather models on upper wing inspired by covert of bird wing is fabricated. In the wind tunnel, the Kármán vortex street was generated by putting a cylinder at the upstream of the bird-inspired wing. The aerodynamic forces on the wing model is measured dynamically by a 6-axis load cell, and the robustness of the wing is evaluated by the averaged lift-to-drag ratio (L/D) and the coefficient of variation of the lift force (CV). As a result, it is found that the length and the flexibility of the attached structure affects both of the indices, and the L/D and the CV can be enhanced by using the appropriate structure for the attachment.
