Initial Characterization of Self-Activated Movable Flaps, "Pop-Up Feathers"
Initial Characterization of Self-Activated Movable Flaps, "Pop-Up Feathers"
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DOI：
10.2514/6.2008-369
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发表时间：
2008-01
期刊：
影响因子：
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通讯作者：
K. Kernstine;Courtney Moore;A. Cutler;R. Mittal
中科院分区：
文献类型：
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作者：
K. Kernstine;Courtney Moore;A. Cutler;R. Mittal
自激活的可移动襟翼或弹出羽毛被大多数有羽毛的生物用作在着陆或引起大迎角（阵风）期间修改箔片特性的手段。当气流正常分离，导致升力急剧下降时，这些弹出的羽毛将被激活，从而延迟失速的影响。虽然这些襟翼几乎可以完全消除普通无人机机翼（NACA 2412）的失速区，但它们还没有在任何飞机上得到商业应用。缺乏这些皮瓣主要是由于缺乏了解，在他们的特点。本文采用风洞试验，试图初步表征在低雷诺数区域（1x 10 - 5x 10）使用这种襟翼的特性，包括它们的位置、尺寸和理想材料特性
Self-activated movable flaps or pop-up feathers are used by a preponderance of feathered creatures as a means to modify foil characteristics during landing or incurred high angles of attack (gusts). When flow would normally separate, causing drastic decreases in lift, these pop-up feathers will activate, thus delaying the effects of stall. Although these flaps can almost entirely eliminate the stall region in a common UAV foil (NACA 2412), they have yet to be used commercially on any aircraft. The absence of these flaps is attributed mainly to the lack of understanding in their characteristics. This paper uses wind tunnel testing in an attempt to initially characterize the use of such flaps in low Reynolds number regions (1x10-5x10), including their placement, size and ideal material characteristics