Experimental study on flow interaction between fore- and hindwings of dragnofly in hovering and forward flight

Hiroto Nagai, Koji Isogai, Tatsumi Fujimoto

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

8 被引用数 (Scopus)

抄録

There are various flow interactions between the fore- and hindwings of a dragonfly. However, the detailed mechanism of flow interaction between the fore- and hindwings has not been well understood. In this study, we clarify the aerodynamic mechanisms of flow interaction between fore- and hindwings of a dragonfly in hovering and forward flights. Measurements of unsteady aerodynamic forces acting on the tandem wings are conducted using a dynamically scaled mechanical model in a water tunnel. Moreover, flow visualization around the tandem wings is conducted using Particle Image Velocimetry. The effect of the phase difference between the fore- and hindwings on the aerodynamic characteristics is investigated in hovering and forward flights. The results indicate that the advanced hindwing ahead of the forewing, which is often used in steady flights of dragonflies, has a smaller variation with respect to the phase difference and a smaller difference between the fore- and hindwings in hovering and forward flight. In hovering flight, the flow interaction reduces the aerodynamic characteristics except at the phase difference of 0 deg. In forward flight, the advanced hindwing generates larger lift with a good efficiency than that without interaction.

本文言語英語
ホスト出版物のタイトル27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
ページ998-1007
ページ数10
出版ステータス出版済み - 12月 1 2010
外部発表はい
イベント27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010 - Nice, フランス
継続期間: 9月 19 20109月 24 2010

出版物シリーズ

名前27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
2

その他

その他27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010
国/地域フランス
CityNice
Period9/19/109/24/10

!!!All Science Journal Classification (ASJC) codes

  • 航空宇宙工学
  • 制御およびシステム工学
  • 電子工学および電気工学
  • 材料科学(全般)

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