On the aerodynamic effects of pitching phase angle on a two-dimensional hovering wing

X. H. Zhang*, Kim-Boon Lua, T. T. Lim, K. S. Yeo

*此作品的通信作者

研究成果: Conference contribution同行評審

摘要

This paper reports a fundamental investigation of the effects of pitching phase angle on the aerodynamics of a two-dimensional (2D) flapping wing executing simple harmonic motion in hovering mode. Direct force measurement and digital particle image velocimetry (DPIV) were employed to obtain the time-dependent aerodynamic forces acting on the wing and the associated flow structures, respectively. Six pitching phase angles, i.e. 0°, 60°, 90°, 110°, 150° and 180°, were studied. For the present set of wing motions, the delayed pitching (i.e. φ < 90) caused the averaged lift to decrease and the averaged drag to increase, overall reducing the lift to drag ratio greatly. On the other hand, the advanced pitching, in the range of 90° < φ ≤ 110°, caused the lift to increase and drag to decrease, resulting in higher lift to drag ratio. But further increase in the phase angle had the opposite effects, resulting in both the lift and lift to drag ratio peaking at φ ≈ 110°.

原文English
主出版物標題2011 Defense Science Research Conference and Expo, DSR 2011
DOIs
出版狀態Published - 2011
事件2011 Defense Science Research Conference and Expo, DSR 2011 - Singapore, Singapore
持續時間: 3 8月 20115 8月 2011

出版系列

名字2011 Defense Science Research Conference and Expo, DSR 2011

Conference

Conference2011 Defense Science Research Conference and Expo, DSR 2011
國家/地區Singapore
城市Singapore
期間3/08/115/08/11

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