The Role of Elytra in Beetle Flight: I. Generation of Quasi-Static Aerodynamic Forces |
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| Authors: | Patar Ebenezer Sitorus Hoon Cheol Park Doyoung Byun Nam Seo Goo Cheol Heui Han |
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| Institution: | a National Research Laboratory for Biomimetics and Intelligent Microsystems, Konkuk University, Seoul 143-701, Korea;b Department of Advanced Technology Fusion, Konkuk University, Seoul 143-701, Korea;c Department of Aerospace Information System Engineering, Konkuk University, Seoul 143-701, Korea;d Department of Aeronautical and Mechanical Design, Chungju National University, Chungju 380-702, Korea |
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| Abstract: | We conducted a comprehensive study to investigate the aerodynamic characteristics and force generation of the elytra of abeetle,Allomyrina dichotoma.Our analysis included wind tunnel experiments and three-dimensional computational fluiddynamics simulations using ANSYS-CFX software.Our first approach was a quasi-static study that considered the effect ofinduced flapping flow due to the flapping motion of the fore-wings (elytra) at a frequency of around 30 Hz to 40 Hz.The dihedralangle was varied to represent flapping motion during the upstroke and downstroke.We found that an elytron producespositive lift at 0° geometric angle of attack,negative lift during the upstroke,and always produces drag during both the upstrokeand downstroke.We also found that the lift coefficient of an elytron does not drop even at a very high geometric angle of attack.For a beetle with a body weight of 5 g,based on the quasi-static method,the fore-wings (elytra) can produce lift of less than 1%of its body weight. |
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| Keywords: | elytra angle of attack dihedral angle CFD wind tunnel test |
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