Abstract
In the present study, numerical simulations are performed to explore the significance of elytron-hindwing interaction in the forward flying Coleopteran beetle. The study investigates the effects of hindwing stroke amplitude (A/c) and advance ratio (J), (which is defined as the ratio of the incoming air velocity to the wing flapping velocity), on the aerodynamic forces. The wing kinematics of a Coleopteran beetle is constructed by using a combination of translation and rotation motion. The elytron is modeled by using a cambered airfoil that mimics the real geometry of the beetle wing, and the hindwing is modeled by using an elliptical profile. The results indicate that the beetle cruises with a constant velocity at approximately J = 0.3 in the tandem wing arrangement. It is observed that the angle of the net force vector relative to the stroke plane tilts systematically according to the flying speed. The influence of vortex structures on the beetle aerodynamic forces is analyzed. The elytron-hindwing interaction is found to be beneficial to the vertical force generation of hindwing as well as for the elytron when J > 0.0. The vortices interaction is observed during the downstroke period, and the leading edge vortex (LEV) of the elytron is captured by LEV of the hindwing that enhances the total vertical force. During the upstroke translation phase, the combined trailing edge vortex of elytron interacts/merges with the LEV of the hindwing and increases the horizontal force.
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References
T. Q. Le, D. Byun, Saputra, J. H. Ko, H. C. Park and M. Kim, Numerical investigation of the aerodynamic characteristics of a hovering Coleopteran insect, Journal of Theoretical Biology, 266 (2010) 485–495.
T. Q. Le, D. Byun, Y. H. Yoo and J. H. Ko, Experimental and numerical investigation of beetle flight, International Conference on Robotics and Biomimetic Bangkok, Thailand (2009).
L. C. Johansson, S. Engel, E. Baird, M. Dacke, F. T. Muijres and A. Hedenstrom, Elytron boost lift, but reduce aerodynamic efficiency in flying beetles, J. R. Society Interface, 9 (2012) 2745–2748.
G. T. Walker, Flapping flight of birds, J. R. Aero. Soc., 29 (1925) 590–594.
S. Ho, H. Nassef, N. Pornsinsirirak, Y. C. Tai and C. M. Ho, Unsteady aerodynamics and flow control for flapping wing flyers, Progress in Aerospace Sciences, 39 (2003) 635–681.
R. R. Harbig, J. Sheridan and M. C. Thompson, The role of advance ratio and aspect ratio in determining leading–edge vortex stability for flapping flight, Journal of Fluid Mech., 751 (2014) 71–105.
J. S. Han, J. W. Chang and J. H. Han, The advance ratio effect on the lift augmentations of an insect–like flapping wing in forward flight, Journal of Fluid Mech., 808 (2016) 485–510.
R. Dudley, The biomechanics of insect flight: Form, function, evolution, N.J, USA, Princeton University Press (2002).
T. Q. Le, T. V. Truong, S. H. Park, T. Q. Truong, J. H. Ko, H. C. Park and D. Byun, Improvement of the aerodynamic performance by wing flexibility and elytra–hindwing interaction of a beetle during forward flight, Journal of Royal Society Interface, 10 (2013) 20130312.
T. Weis–Fogh, Quick estimates of flight fitness in flying animals, including novel mechanisms of lift production, Journal of Experimental Biology, 59 (1973) 169–230.
S. P. Sane and M. H. Dickinson, The control of flight force by a flapping wing: Lift and drag production, The Journal of Experimental Biology, 204 (2001) 2607–2626.
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Fouzia Dahmani received her M.Sc. in Mechanical Engineering from the University of Science and Technology, Algeria in 2014. She is currently a Ph.D. student at Kyungpook National University, Daegu, South Korea. Her research interests include computational fluid dynamics, aerodynamic of insect flapping wings. Energy harvesting based on the oscillatory foils inspired from aquatic animals.
Chang Hyun Sohn received his M.Sc. in Mechanical Engineering from KAIST in 1985. He then received his Ph.D. in Mechanical Engineering from KAIST in 1991. He worked in ADD for 3 years. He also worked in University of Cambridge as a Visiting Assistant Professor in 1996. Dr. Sohn is currently a Professor at the Department of Mechanical Engineering at Kyungpook National University, Daegu, South Korea. His research interests are computational fluid dynamics, particle image velocimetry, flow induced vibration and thermal hydraulics.
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Dahmani, F., Sohn, C.H. Effects of advance ratio on elytra-hindwing interaction in forward flying Coleopteran beetle. J Mech Sci Technol 32, 5703–5710 (2018). https://doi.org/10.1007/s12206-018-1117-5
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DOI: https://doi.org/10.1007/s12206-018-1117-5