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| 蜻蜓拍翼前飞中模型翼动态柔性变形的气动效应研究 | |
| 引用本文： | 徐明,余永亮,鲍麟.蜻蜓拍翼前飞中模型翼动态柔性变形的气动效应研究[J].中国科学院研究生院学报,2006,23(6):729-735. |
| 作者姓名： | 徐明 余永亮 鲍麟 |
| 作者单位： | 1. 中国科学技术大学力学和机械工程系,合肥,230026;中国科学院研究生院生物运动力学实验室,北京,100049 2. 中国科学院研究生院生物运动力学实验室,北京,100049 |
| 基金项目： | 国家自然科学基金;中国科学院科研基金 |
| 摘 要： | 根据蜻蜓拍翼前飞激发的流场具有St>>1/Re的特点，在理论模化框架下，本文采用势流假设，用二维变形体前、后缘脱涡的面元法研究了前飞模型蜻蜓翼在周期性拍动中动态柔性变形引起的气动力响应。通过比较柔性模型翼和刚性模型翼气动力随时间的变化，发现在下拍行程中动态柔性变形显著地提高了升力和推力；值得注意的是，蜻蜓前飞时，翼的实际柔性变形幅值恰处于一个最佳范围内，它大幅地提高了升力，同时使消耗的气动功率趋近于最低，有利于蜻蜓维持前飞状态。 |
| 关 键 词： | 模型蜻蜓翼 拍翼前飞 动态柔性变形 气动效应 理论模化 |
| 文章编号： | 1002-1175(2006)06-0729-07 |
| 修稿时间： | 2006年3月7日 |
Theoretical Modeling Study on the Aerodynamic Effects of Dragonfly Flexible Wing in Forward Flapping Flight |
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| XU Ming,YU Yong-Liang,BAO Lin.Theoretical Modeling Study on the Aerodynamic Effects of Dragonfly Flexible Wing in Forward Flapping Flight[J].Journal of the Graduate School of the Chinese Academy of Sciences,2006,23(6):729-735. | |
| Authors: | XU Ming YU Yong-Liang BAO Lin |
| Institution: | 1 Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China; 2 The Laboratory for Biomechanics of Animal Locomotion, Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | Theoretical modeling is effective to study the flow aroused by wings of dragonfly in flapping flight, which is highly unsteady, i.e., characterized as St>>1/Re. The aerodynamic effects of a model wing with time-changing deformation during cyclic wing beats in dragonfly forward flight are investigated, using two-dimensional panel method. In this study, the dragonfly wing is modeled as a two-dimensional deformable plate, and the panel method is improved to deal with vortex shedding from both leading- and trailing- edges of the plate. Results show that lift is enhanced greatly during down-stroke stage of the flexible wing, compared with that in the rigid case, and the actual amplitude of the wing deformation is contributive to reduce the mean aerodynamic power and enhance lift, which means a longer-time forward flight is available. |
| Keywords: | dragonfly flexible wing forward flapping flight time-changing deformation aerodynamic effects theoretical modeling |
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