Role of wing morphing in thrust generation
Role of wing morphing in thrust generation
复制标题
机翼变形在推力产生中的作用
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
I. Puri
中科院分区：
文献类型：
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作者：
M. Ghommem;M. Hajj;P. Beran;I. Puri
在本文中，我们通过模拟具有两种不同鸟类（即巨型海燕和鸽子朊病毒）特征的刚性和变形翅膀上的流动，研究了变形对两种鸟类飞行动力学的作用。扑动刚性机翼的模拟表明，机翼的根部应放置在特定的攻角处，以便产生足够的升力来平衡鸟的重量。然而，在这种情况下，产生的推力要么非常小，要么甚至为负，具体取决于机翼的形状。此外，结果表明机翼的变形可以显着增加推力和推进效率。这表明鸟类实际上利用某种主动的翅膀扭转和弯曲来产生足够的推力。这项研究应该有助于更好地指导扑翼飞行器的设计。
In this paper, we investigate the role of morphing on flight dynamics of two birds by simulating the flow over rigid and morphing wings that have the characteristics of two different birds, namely the Giant Petrel and Dove Prion. The simulation of a flapping rigid wing shows that the root of the wing should be placed at a specific angle of attack in order to generate enough lift to balance the weight of the bird. However, in this case the generated thrust is either very small, or even negative, depending on the wing shape. Further, results show that morphing of the wing enables a significant increase in the thrust and propulsive efficiency. This indicates that the birds actually utilize some sort of active wing twisting and bending to produce enough thrust. This study should facilitate better guidance for the design of flapping air vehicles.