S114044 トンボ翅表面の微細突起物の空力特性([S11404]機素潤滑設計部門第17回卒業研究コンテスト(4))

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Dragonfly attracts attention by many researchers to develop MAV (Micro Air Vehicle) , because dragonfly's have high flight performances and those are immediate acceleration, the rapid turning and hovering. We investigated spikes on wing surface of a dragonfly and influence with the aerodynamics. The length and shape of spikes were 10 to 100 [tin and oblique circular cones. In this paper, artificial spikes were fabricated by the application of electrolytic polishing. The fabricated spikes were set on an artificial wing. After that we tried the visualization experiments using the artificial wings. The experiment was conducted in a steady-state of flow and non-steady state of flows with flaps simulator. We observed a characteristic flow at a result in a steady state of flow. In addition, we observed a change of the vortex generation in a non-steady of flow. As a result, we clarified one end of the flight mechanism of the dragonfly which did not become clear until now.
2011-09-11