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The leading-edge vortex and aerodynamics of insect-based flapping-wing micro air vehicles

Published online by Cambridge University Press:  03 February 2016

P. C. Wilkins  and
K. Knowles
P. C. Wilkins
Affiliation:
pwilkins@dstl.gov.uk, Air and Weapons Systems Department, Defence Science and Technology Laboratory, Farnborough, UK
K. Knowles
Affiliation:
k.knowles@cranfield.ac.uk, Aeromechanical Systems Group, Cranfield University, Defence Academy of the United Kingdom, Shrivenham, UK
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Abstract

The aerodynamics of insect-like flapping are dominated by the production of a large, stable, and lift-enhancing leading-edge vortex (LEV) above the wing. In this paper the phenomenology behind the LEV is explored, the reasons for its stability are investigated, and the effects on the LEV of changing Reynolds number or angle-of-attack are studied. A predominantly-computational method has been used, validated against both existing and new experimental data. It is concluded that the LEV is stable over the entire range of Reynolds numbers investigated here and that changes in angle-of-attack do not affect the LEV’s stability. The primary motivation of the current work is to ascertain whether insect-like flapping can be successfully ‘scaled up’ to produce a flapping-wing micro air vehicle (FMAV) and the results presented here suggest that this should be the case.

Type
Research Article
Information
The Aeronautical Journal , Volume 113 , Issue 1142 , April 2009 , pp. 253 - 262
Copyright
Copyright © Royal Aeronautical Society 2009 

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References

1. Keennon, M.T. and Grasmeyer, J.M., Development of the Black Widow and Microbat MAVs and a vision of the future of MAV design. AIAA/ICAS International Air and Space Symposium and Exposition: The Next 100 Years, July 2003, Dayton, OH, USA.Google Scholar
2. Epson. Epson Announces Advanced Model of the World’s Lightest Micro-Flying Robot. World Wide Web, www.epson.co.jp/e/newsroom/news_2004_08_18.htm, 2004. Accessed: 02/11/2006.Google Scholar
3. Woods, M.I., Henderson, J.F. and Lock, G.D., Energy requirements for the flight of micro air vehicles. Aeronaut J, 2001, 105, (1045), pp 135–149.Google Scholar
4. Wilkins, P., Knowles, K. and Zbikowski, R., Some non-linear aerodynamics relevant to flapping-wing MAVs. International Powered Lift Conference, October 2005, Dallas, TX, USA.Google Scholar
5. Ansari, S.A., Zbikowski, R. and Knowles, K., Aerodynamic modelling of insect-like flapping flight for micro air vehicles, Progress in Aerospace Sciences, 2006, 42, pp 129–172.Google Scholar
6. Marey, E.J., Determination experimentale du mouvement des ailes des insectes pendant le vol. Les Comptes rendus de l’Académie des Sciences, 1868, 67, pp 1341–1345.Google Scholar
7. Dickinson, M.H., Lehmann, F. and Sane, S.P., Wing rotation and the aerodynamic basis of insect flight, Science, 1999, 284, (5422), pp 1954–1960.Google Scholar
8. Fry, S.N., Sayaman, R. and Dickinson, M.H., The aerodynamics of free-flight maneuvers in Drosophila. Science, 2003, 300, pp 495–498.Google Scholar
9. Ellington, C.P., The aerodynamics of hovering insect flight. III. Kinematics. Philosophical Transactions of the Royal Society of London B, 1984, 305, pp 41–78.Google Scholar
10. Vogel, S., Flight in Drosophila: III. Aerodynamic characteristics of fly wings and wing models, J Experimental Biology, 1967, 46, pp 431–443.Google Scholar
11. Maxworthy, T., Experiments on the Weis-Fogh mechanism of lift generation by insects in hovering flight. Part 1: Dynamics of the ‘fling’. J Fluid Mechanics, 1979, 93, pp 47–63.Google Scholar
12. Dickinson, M.H. and Götz, K.G., Unsteady aerodynamic performance of model wings at low Reynolds numbers. J Experimental Biology, 1993, 174, pp 45–64.Google Scholar
13. Ellington, C.P., Van Den Berg, C., Willmott, A.P. and Thomas, A.L.R., Leading-edge vortices in insect flight. Nature, 1996, 384, pp 626–630.Google Scholar
14. Willmott, A.P., Ellington, C.P. and Thomas, A.L.R., Flow visualisation and unsteady aerodynamics in the flight of the Hawkmoth, Manduca sexta. Philosophical Transactions of the Royal Society of London, 1997, 352, pp 303–316.Google Scholar
15. Van Den Berg, C. and Ellington, C.P., The three-dimensional leadingedge vortex of a ‘hovering’ model Hawkmoth. Philosophical Transactions of the Royal Society B, 1997, 352, (1351), pp 329–340.Google Scholar
16. Ellington, C.P., Unsteady aerodynamics of insect flight. In Ellington, C.P. and Pedley, T.J., (Eds), Biological Fluid Dynamics, pp 109–129. Society for Experimental Biology, 1995.Google Scholar
17. Dickinson, M.H., Unsteady mechanisms for force generation in aquatic and aerial locomotion, American Zoologist, 1996, 36, (6), pp 537–554.Google Scholar
18. Kramer, M., Increase in the maximum lift of an airplane wing due to a sudden increase in its effective angle of attack resulting from a gust. Technical Report TM-678, NACA, 1932.Google Scholar
19. Ramasamy, M. and Leishman, J.G., Phase-locked particle image velocimetry measurements of a flapping wing, J Aircr, 2006, 43, (6), pp 1867–1875.Google Scholar
20. Wilkins, P., Some Unsteady Aerodynamics Relevant to Insect-Inspired Flapping-Wing Micro Air Vehicles. PhD thesis, Cranfield University, Shrivenham, UK, 2008. Available online at http://hdl.handle..net/1826/2913.Google Scholar
21. Ansari, S.A., Zbikowski, R. and Knowles, K., A Nonlinear unsteady aerodynamic model for insect-like flapping wings in the hover: Part 1: methodology and analysis. Proceedings of the Institutions of Mechanical Engineers, Part G: J Aerospace Engineering, 2006, 220, (2), pp 61–83.Google Scholar
22. Kurtulus, D.F., David, L., Farcy, A. and Alemdaroglu, N., Aerodynamic characteristics of flapping motion in hover, Experiments in Fluids, Online First, 2007.Google Scholar
23. Lee, J.-S., Kim, J.-H. and Kim, C., Numerical study on the unsteady-force-generation mechanism of insect flapping motion, AIAA J, 2008, 46, pp 1835–1848.Google Scholar
24. Van Dyke, M., An Album of Fluid Motion, The Parabolic Press, 1982.Google Scholar
25. Lua, K.B., Lim, T.T. and Yeo, K.S., Aerodynamic forces and flow fields of a two-dimensional hovering wing, Experiments in Fluids, 2008, 45, pp 1047–1065.Google Scholar
26. Chen, J.M. and Fang, Y-C., Strouhal numbers of inclined flat plates, J Wind Engineering and Industrial Aerodynamics, 1996, 61, pp 99–112.Google Scholar
27. Wilkins, P. and Knowles, K., Investigation of aerodynamics relevant to flapping-wing micro air vehicles, 37th AIAA Fluid Dynamics Conference and Exhibit, June 2007, Miami, FL, USA, 2007.Google Scholar
28. Dudley, R., Atmospheric oxygen, giant Paleozoic insects and the evolution of aerial locomotor performance, J Experimental Biology, 1998, 201, pp 1043–1050.Google Scholar
29. Massey, B. and Ward-Smith, J., Mechanics of Fluids, Stanley Thornes, (7th Ed), 1998.Google Scholar
30. Dickinson, M.H., The effects of wing rotation on unsteady aerodynamic performance at low Reynolds numbers, J Experimental Biology, 1994, 192, pp 179–206.Google Scholar
31. Sane, S.P. and Dickinson, M.H., The control of flight force by a flapping wing: Lift and drag production, J Experimental Biology, 2001, 204, (15), pp 2607–2626.Google Scholar
32. Birch, J.M. and Dickinson, M.H., The influence of wing-wake interactions on the production of aerodynamic forces in flapping flight, J Experimental Biology, 2003, 206, pp 2257–2272.Google Scholar
33. Sun, M. and Tang, J., Unsteady aerodynamic force generation by a model fruit fly wing in flapping motion. J Experimental Biology, 2002, 205, pp 55–70.Google Scholar
34. Aono, H. and Liu, H., Vortical structure and aerodynamics of Hawkmoth hovering, J Biomechanical Science and Engineering, 2006, 1, (1), pp 234–245.Google Scholar
35. Wu, J. and Sun, M., The influence of the wake of a flapping wing on the production of aerodynamic forces, Acta Mechanica Sinica, 2005, 21, (5), pp 411–418.Google Scholar