Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight

doi:10.1007/s10483-014-1882-6

Applied Mathematics and Mechanics (English Edition) ›› 2014, Vol. 35 ›› Issue (12): 1607-1618.doi: https://doi.org/10.1007/s10483-014-1882-6

• • 上一篇

Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight

管子武^1,2, 余永亮²

1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, P. R. China;
2. The Laboratory for Biomechanics of Animal Locomotion, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

收稿日期:2013-10-07 修回日期:2014-02-26 出版日期:2014-12-01 发布日期:2014-12-01
通讯作者: Yong-liang YU, Associate Professor, Ph.D., E-mail: ylyu@ucas.ac.cn E-mail:ylyu@ucas.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (No.10602061)

Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight

Zi-wu GUAN^1,2, Yong-liang YU²

1. Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, P. R. China;
2. The Laboratory for Biomechanics of Animal Locomotion, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received:2013-10-07 Revised:2014-02-26 Online:2014-12-01 Published:2014-12-01
Contact: 10.1007/s10483-014-1882-6 E-mail:ylyu@ucas.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (No.10602061)

摘要/Abstract

摘要： The aerodynamic mechanism of the bat wing membrane along the lateral border of its body is studied. The twist-morphing that alters the angle of attack (AOA) along the span-wise direction is observed widely during bat flapping flight. An assumption is made that the linearly distributed AOA is along the span-wise direction. The plate with the aspect ratio of 3 is used to model a bat wing. A three-dimensional (3D) unsteady panel method is used to predict the aerodynamic forces generated by the flapping plate with leading edge separation. It is found that, relative to the rigid wing flapping, twisting motion can increase the averaged lift by as much as 25% and produce thrust instead of drag. Furthermore, the aerodynamic forces (lift/drag) generated by a twisting plate-wing are similar to those of a pitching rigid-wing, meaning that the twisting in bat flight has the same function as the supination/pronation motion in insect flight.

关键词: bat wing, panel method, aerodynamic mechanism, twisting

Abstract: The aerodynamic mechanism of the bat wing membrane along the lateral border of its body is studied. The twist-morphing that alters the angle of attack (AOA) along the span-wise direction is observed widely during bat flapping flight. An assumption is made that the linearly distributed AOA is along the span-wise direction. The plate with the aspect ratio of 3 is used to model a bat wing. A three-dimensional (3D) unsteady panel method is used to predict the aerodynamic forces generated by the flapping plate with leading edge separation. It is found that, relative to the rigid wing flapping, twisting motion can increase the averaged lift by as much as 25% and produce thrust instead of drag. Furthermore, the aerodynamic forces (lift/drag) generated by a twisting plate-wing are similar to those of a pitching rigid-wing, meaning that the twisting in bat flight has the same function as the supination/pronation motion in insect flight.

Key words: bat wing, aerodynamic mechanism, twisting, panel method

中图分类号:

O351.2
O355

管子武;余永亮. Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight[J]. Applied Mathematics and Mechanics (English Edition), 2014, 35(12): 1607-1618.

Zi-wu GUAN;Yong-liang YU. Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight[J]. Applied Mathematics and Mechanics (English Edition), 2014, 35(12): 1607-1618.

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Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight

Aerodynamic mechanism of forces generated by twisting model-wing in bat flapping flight

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