An Effect of Wing Corrugation on A Gliding Flight of a Dragonfly
A stable flight in a wind becomes more difficult as the weight of a flyer becomes smaller. However, a dragonfly whose weight is less than lg can fly stably in a strong wind. Recently it has been reported that this high stability might be caused by corrugation of the wings. The aim of the present study is to make clear how the wing corrugation can stabilize a flight First, we measured the steady aerodynamic characteristics of a corrugated wing and of a smooth wing. Second, stability derivatives of three airplanes were estimated by using the measured aerodynamic characteristics. One airplane has the smooth wings, and the other two airplanes have the corrugated wings. Finally, we compared flight path of the three airplanes when they encounter a side wind. Our study shows a dragonfly can make the flight direction parallel to the wind quickly by the effect of the corrugation. This means the duration when a dragonflys motion is affected by a side wind can be decreased by the corrugation.
corrugation low Reynolds number flight stability gust response
Mikihito Hashizume Shigeru Sunada Keiji Kawachi
Department of Aerospace Engineering, Osaka Prefecture University, Japan Department of Aeronautics and Astronautics, University of Tokyo, Japan
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
82-85
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）