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http://dx.doi.org/10.5139/JKSAS.2012.40.8.662

The Effect of Aspect Ratio on the Aerodynamic Characteristics of an Insect-based Flapping Wing  

Han, Jong-Seob (한국항공대학교 항공우주 및 기계공학과)
Chang, Jo-Won (한국항공대학교 항공운항학과)
Jeon, Chang-Soo (한국항공대학교 항공우주 및 기계공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.40, no.8, 2012 , pp. 662-669 More about this Journal
Abstract
The effect of aspect ratio (AR) on the aerodynamic characteristics of a flapping wing was examined to analyze the design parameters of an insect-based MAV. The experimental model constructed with 4-bar linkages was operated in a water tank with the condition of a low Reynolds number. A water-proof micro-force load cell was fabricated and installed at the root of the wing which is made of a plexiglas. The wing shapes were based on the planform of a fruit fly wing. The ARs selected were 1.87, 3.74 and 7.48 and the Reynolds number was fixed at $10^4$. For AR=1.87 and 3.74, distinct lift peaks which indicate unsteady effects such as 'wake-capture' were observed at the moment of the start of the wing-stroke. However, for AR=7.48, no unsteady effects were observed. These phenomena were also observed in the delayed rotation case. The results indicate that a larger AR provides better aerodynamic performance for the insect-based flapping wing which can be applied in MAV designs.
Keywords
MAV; Insect Flight; Bio-mimetic Mechanics; Aspect ratio; Aerodynamic Effect;
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  • Reference
1 C. P. Ellington, C. Berg, A. P. Willmott and A. L. R. Thomas, "Leading-edge Vortices in Insect Flight", Nature, Vol. 384, 1996, pp. 626-630   DOI   ScienceOn
2 M. Dickinson, F-O Lehmann, S. P. Sane, "Wing Rotation and the Aerodynamic Basis of Insect Flight", SCIENCE, Vol. 284, pp. 1954-1960
3 W. Shyy, Y. Lian, J. Tang, D. Viieru and H. Liu, Aerodynamics of Low Reynolds Number Flyers, Cambridge University Press, New York, 2008
4 Wang, "Two Dimensional Mechanism for Insect Hovering", Phys. Rev. Lett. Vol. 85, pp. 2216-2219   DOI   ScienceOn
5 M. Sun and J. Tang , "Unsteady aerodynamic force generation by a model fruit fly wing in flapping motion", J. Exp. Biol., Vol. 205, 2002, pp. 55-70
6 D. Lentink and M. H. Dickinson, "Biofluiddynamic scaling of flapping, spinning and translating fins and wings", J. Exp. Biol., Vol. 212, pp. 2691-2704
7 D. Lentink and M. H. Dickinson, "Rotational accelerations stabilize leading edge vortices on revolving fly wings", J. Exp. Biol., Vol. 212, pp. 2705-2719
8 Jong-seob Han, Jo won Chang, In-mo Kang and Sun-tae Kim, "Flow Visualization and Force Measurement of an Insect-based Flapping Wing," AIAA Paper 2010-66, 48th AIAA Aerospace Sciences Meeting Including The New Horizons Forum and Aerospace Exposition, 4-7 Jan 2010, Orlando, Florida.
9 M. Yamamoto and K. Isogai, 2005, "Measurement of Unsteady Fluid Dynamic Forces for a Mechanical Dragonfly Model," AIAA Journal, Vol. 43, No. 12, pp. 2475-2480
10 F-O Lehmann, S. P. Sane, and M. Dickinson, "The Aerodynamic Effects of Wing-wing Interaction in Flapping Insect Wings," J. Exp. Biol., Vol. 208, 2005, pp. 3075-3092   DOI   ScienceOn
11 J. P. Whitney and R. J. Wood, "Aeromechanics of passive rotation in flapping flight", J. Fluid Mech., Vol. 660, pp. 197-220
12 T. Weis-Fogh, "Quick Estimates of Flight Fitness in Hovering Animals, Including Novel Mechanisms for Lift Production", J. Exp. Biol., Vol. 59, pp. 169-230
13 C. P. Ellington, "The Novel Aerodynamics of Insect Flight: Applications to Micro-Air Vehicles", J. Exp. Biol., Vol. 202, pp. 3439-3448