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中国科学院大学学报 ›› 2005, Vol. 22 ›› Issue (6): 676-684.DOI: 10.7523/j.issn.2095-6134.2005.6.003

• 论文 • 上一篇    下一篇

模型翼拍动中动态柔性变形效应的数值研究

鲍麟, 童秉纲   

  1. 中国科学院研究生院生物运动力学实验室, 北京 100049
  • 收稿日期:2004-12-15 修回日期:2005-01-13 发布日期:2005-11-15
  • 通讯作者: 童秉纲,Email:tongbg@gucas.ac.cn
  • 基金资助:

    国家自然科学基金项目(90305009);中国科学院创新项目(KJCX-SW-L04,KJCX2-SW-L2)

A Numerical Study on the Aerodynamics Effects of Time-Changing Wing Flexible Deformation in its Flapping Motions

BAO Lin, TONG Bing-Gang   

  1. The Laboratory for Biomechanics of Animal Locomotion, Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
  • Received:2004-12-15 Revised:2005-01-13 Published:2005-11-15

摘要:

利用数值求解二维不可压缩Navier-Stokes方程,研究了在两种拍动基元运动中,模型翼动态柔性变形对其气动性能的影响.由柔性翼和刚性翼的结果比较发现,附加惯性效应是动态变形影响气动性能的主要原因,变形加速率决定了瞬时气动性能改变量的大小,相比之下,动态变形对气动性能时均值的影响则弱得多。

关键词: 柔性效应, 动态变形, 变形加速率, 基元运动, 计算流体力学

Abstract:

A computational fluid dynamic study,based on 2-D incompressible Navier-Stokes Equations,is presented to investigate the aerodynamics effects of time-changing wing flexible deformation in its flapping.Two elementary motions of the wing flapping,i.e. accelerated translation and non-uniform rotation,are studied,in which both the flexible and rigid wing cases are compared.It is revealed that in comparison of the rigid wing case,the wing deformation acceleration in the flexible wing case leads to the added inertial effect,which causes a lot of change in instantaneous aerodynamic performance of the wing.With regard to the time-averaged one,the flexibility effect is much less.

Key words: flexible wing flapping in insects flight, time-changing wing deformation, wing deformation acceleration, elementary motions, computational fluid dynamics

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