Abstract
Recently, flight characteristic of dragonfly has been investigated by many researchers. In particular, wing motion such as dragonfly has attracted attention. Dragonfly has high flight performances in spite of small size. On the other hand, dragonfly wing has about 3000 of micro spikes of which length is about from 10 to 100μm. It is believe that these micro structures affect the flight characteristic of dragonfly. In this study, a plate with micro spikes is fabricated, and the pressure drag of the vertical flat plate with micro spikes was measured.The artificial spikes were fabricated the same size as dragonfly wing. The measurement of drag force was carried out with the flat plate with spikes and without. As a result, effect of micro spikes was appeared at low Reynolds number of from 1000 to 2000.
