Physical mechanisms of lift enhancement for flexible delta wings
Physical mechanisms of lift enhancement for flexible delta wings
复制标题
柔性三角翼升力增强物理机制
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Taylor
中科院分区：
文献类型：
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作者：
E. Vardaki;I. Gursul;G. Taylor
柔性非细长三角翼的被动增升已被证明是控制涡主导机翼流动的一种潜在方法。讨论了升力增强的物理机制和重要变量的影响。小/中后掠角柔性机翼的升力增强是一个非常复杂的现象，涉及前缘自诱导反对称振动、大时均偏转引起的展向弯度效应、剪切层不稳定性、再附着、平均涡量通量和环量增加、前缘涡的重新形成、可能的流向压力梯度增强以及频率和边缘速度的影响。
Passive lift enhancement for flexible nonslender delta wings has been demonstrated as a potential method for the control of vortex-dominated wing flows. Physical mechanisms of lift enhancement and the effect of important variables are discussed. Lift enhancement for flexible wings with low/moderate sweep is a very complex phenomenon, involving self-induced antisymmetric vibrations of leading edges, spanwise camber effect due to the large time-averaged deflection, shear layer instabilities, reattachment, increased mean vorticity flux and circulation, re-formation of the leading edge vortices, possible enhancement of streamwise pressure gradient, and the effects of frequency and edge velocity.