| 正交各向异性薄膜沉浮运动流固耦合效应的数值研究 |
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| 作者姓名： | 隋晓飞 管子武 鲍麟 |
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| 作者单位： | 1. 中国科学院大学生物运动力学实验室, 北京 100049;
2. 中国科学技术大学近代力学系, 合肥 230027 |
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| 基金项目： | 国家自然科学基金（10602061）资助 |
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| 摘 要： | 采用非线性有限单元法和非定常面元法，实现了正交各向异性矩形薄膜在拍动中的流固耦合数值模拟，并研究薄膜在小攻角沉浮运动时，在惯性力和气动力共同作用下的非定常变形响应及对应的气动特性. 结果显示，在相同的沉浮运动条件下，薄膜的柔性有助于改善其气动性能，即薄膜弦向、展向弹性模量减小，引起柔性变形幅度的较大增加，则作用于膜上的平均气动升力也相应显著增高，而平均升力与平均气动功率的比值仅略有降低.
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| 关 键 词： | 正交各向异性 薄膜 流固耦合 沉浮运动 气动性能 |
| 收稿时间： | 2013-04-18 |
| 修稿时间： | 2013-05-20 |
Numerical study on the fluid-structure interaction of the heaving orthotropic membrane |
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| Authors: | SUI Xiaofei GUAN Ziwu BAO Lin |
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| Institution: | 1.Laboratory for Biomechanics of Animal Locomotion, University of Chinese Academy of Sciences, Beijing 100049, China;2.Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | Fluid-structure interaction of the orthotropic rectangular membrane during heaving motion is simulated numerically by using a nonlinear finite element method combined with an unsteady panel method. The numerical results are analyzed to understand the influence of flexibility on the aerodynamic performance of the heaving membrane at a small angle of attack. It is indicated that the amplitudes of the deformations increase considerably as the chordwise and the spanwise elastic moduli decrease, which leads to an increase of average aerodynamic lifts at the cost of the slight decrease of the ratio of average aerodynamic lift to power. |
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| Keywords: | orthotropy membrane fluid-structure interaction heaving motion aerodynamic performance |
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