| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
Prev
Next
|
|
|
Leakage of an eagle flight feather and its influence on the aerodynamics |
| Di Tang (唐迪)1,2,†, Dawei Liu(刘大伟)2,‡, Yin Yang(杨茵)2, Yang Li(李阳)2, Xipeng Huang(黄喜鹏)1, and Kai Liu(刘凯)3 |
| 1 College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; 2 High Speed Aerodynamic Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China; 3 Chengdu State-Owned Jinjiang Machine Factory, Chendu 610043, China |
|
|
|
|
Abstract We investigate how the barb of bird feathers is changed along both the rachis and barb. To investigate the microstructures and the mechanical behaviors of barbs, a series of barbs are manually cut from an eagle's primary feather to observe the cross sections. A Λ -like cross section with a tiny hook is observed at the right feet at each section. Afterwards, a measurement of the setup system is developed to evaluate the leakage ratio of a feather followed by a numerical predicting approach based on the CFD method. It is found that the air leakage increases linearly against the pressure, and the predicted results coincide well with the experimental results. Finally, the influences of leakage of the flight feather on both steady and unsteady aerodynamics are studied.
|
Received: 23 July 2020
Revised: 16 September 2020
Accepted manuscript online: 22 October 2020
|
|
PACS:
|
47.32.cd
|
(Vortex stability and breakdown)
|
| |
47.32.Ff
|
(Separated flows)
|
|
| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51705459) and the Natural Science Foundation of Zhejiang Province, China (Grant No. LY20E050022). |
|
Corresponding Authors:
†Corresponding author. E-mail: tangdi@zjut.edu.cn ‡Corresponding author. E-mail: 13404019740@163.com
|
Cite this article:
Di Tang (唐迪), Dawei Liu(刘大伟), Yin Yang(杨茵), Yang Li(李阳), Xipeng Huang(黄喜鹏), and Kai Liu(刘凯) Leakage of an eagle flight feather and its influence on the aerodynamics 2021 Chin. Phys. B 30 034701
|
1 Ren L 2009 Sci. Chin. E-Technol. Sci. 52 273
2 Chen H W, Rao F G, Shang X P, Hang D Y and Hagiwara I 2014 Exp. Fluids 55 1698
3 Pan Y, Ji S, Tan D and Cao H Int. J. Adv. Manuf. Technol. 2020 (in press)
4 Li L, Qi H, Yin Z, Li D, Zhu Z, Tangwarodomnukun V and Tan D2019 Powder. Technol. 350 462
5 Rothstein J 2010 Annu. Rev. Fluid. Mech. 42 89
6 Fransson J H M, Talamelli A, Brandt L and Cossu C 2006 Phys. Rev. Lett. 96 064501
7 Son K, Choi J, Jeon W P and Choi H 2011 J. Fluid. Mech. 672 411
8 Laura Y M, Eric C, Teresa J F, Lindsie J, Amanda K S, Cole T and David L 2020 Science 367 293
9 Feng B B, Chen D R, Wang J D and Yang X T 2014 Adv. Mech. Engin. 7 849294
10 Elimelech Y and Ellington C P 2013 J. Exp. Biol. 216 303
11 Evelien V B, Roeland D K, Gerrit E E and David L 2015 J. Exp. Biol. 218 3179
12 Walsh M J 1983 AIAA J. 21 485
13 Tian L, Ren L Q, Han Z and Zhang S 2005 J. Bionic. Engin. 2 15
14 Nugroho B, Hutchins N and Monty J P 2013 Int. J. Heat. Fluid. Flow 41 90
15 Benschop H O G and Breugem W P 2017 J. Turbul. 18 717
16 Wang B and Meyers M A 2017 Acta Biomater. 48 270
17 Yuan L and Gong X S 2008 J. Exp. Biol. 211 1221
18 Tang D, Liu D W, Zhu H, Huang X P, Fan Z Y and Lei M X 2020 Chin. Phys. B 29 024703
19 Gordon J E1978 Structures(Penguin Press)
20 Sullivan T N, Wang B, Espinosa H D and Meyers M A 2017 Mater. Today 20 377
21 Bachmann T, Emmerlich J, Baumgartner W, Jochen M S and Hermann W 2012 J. Exp. Biol. 215 405
22 Purslow P P and Vincent J F V1978 J. Exp. Biol. 72 251
23 Fraser R D B and David A D P 2011 J. Struct. Biol. 173 391
24 Theagarten L S 2017 Sci. Rep. 7 45162
25 Qu H and Liu X M2019 J. Eng. Therm. 40 1793
26 He Y M, Lu C Y, Zheng W J, Yang J G, Chen S J, Li Z J, Sun Y and Gao Z L 2019 Surf. Coat. Technol. 358 11
27 Eric C, Laura Y M, Amanda K S and David L2020 Sci. Robot. 5 1246
28 Tarah N S, Andre\"í P, Steven A H, David K, Vlado A L and Marc A M 2016 Acta Biomater. 41 27
29 Piao Z Y, Xu B S, Wang H D and Yu X X 2019 Crit. Rev. Solid State 10 1
30 Proctor N S and Lynch P J1993 Manual of Ornithology (New Haven: Yale University Press)
31 Yang W and McKittrick J 2013 Acta Biomater. 9 9065
32 Bhattacharyya S and Singh A 2011 Int. J. Numer. Meth. Fluids 65 683
33 Liu H, Azarpeyvand M, Wei J and Qu Z 2015 J. Sound Vib. 334 190
34 Hahn S, Je J and Choi H 2020 J. Fluid Mech. 450 259
35 Jimenez J, Uhlmann M, Pinelli A and Kawahara G 2001 J. Fluid Mech. 442 89
36 Naito H and Fukagata K 2012 Phys. Fluids 24 117102
37 Liu H, Wei J and Qu Z 2013 J. Fluids Engin. 136 021302
38 Tang D, Liu D W and Fan Z Y2020 J. Test. Eval.
39 Tang D, Fan Z Y, Lei M X, Lv B B, Yu L and Cui H A 2019 Chin. Phys. B 28 034702
40 Breugem W P 2007 Phys. Fluids 19 103104
41 Brinkman H C 1949 Appl. Sci. Res. 1 27 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|
