生物の微細構造を規範とした低騒音型回転翼の開発

抄録

Multicopter-typed unmanned aerial vehicles, called drone, has been attracting wide attentions because of its great potentials for various missions such as surveillance, reconnaissance and delivery. For application of drone, however, its noise will be a serious issue especially when operating in urban areas, and, to our knowledge, it has not been resolved yet. In this study, inspired by our previous studies on the unique wing structures of insects and birds, we have developed new low-noise type propellers for drone. The bio-inspired serrated shapes at the leading-edge were tested and their acoustic and aerodynamic performances were evaluated experimentally and numerically. Our results show that the serrated shape at the leading edge can suppress the noise level while the aerodynamic efficiency decrease. In addition it revealed that the orientation of serration have great effect on noise suppression.