Effects of tandem-wing interactions on aerodynamics of hovering dragonflies

被引：0
作者：
Peng L. [1 ]
Zheng M. [1 ]
Pan T. [1 ]
Su G. [1 ]
Li Q. [1 ]
机构：
[1] School of Energy and Power Engineering, Beihang University, Beijing
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2021年 / 42卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Aerodynamics; Dragonflies; Flapping; Hovering; Tandem-wing interactions;
D O I：
10.7527/S1000-6893.20.24571
中图分类号：
学科分类号：
摘要：
Dragonflies employ tandem-wing hovering with a phase difference of 180°. To investigate the influence of tandem-wing interactions on the aerodynamics of dragonfly hovering, we simulated two cases of tandem-wing hovering and single-wing hovering through CFD. Analyses of the flow fields and comparison of the hover efficiency, aerodynamic force and aerodynamic power of the two cases obtained the aerodynamic effects of the tandem-wing interactions: the 'wake-gathering' effect and 'inflow-bending' effect. The 'wake-gathering' effect can reduce vortex dissipation and wake dissipation near the wings to improve the hovering efficiency, and the 'inflow-bending' effect can weaken the size and strength of the leading edge vortex by reducing the angle of attack of the hindwing during the downstroke to reduce power. The numerical results show that, compared with single-forewing and single-hindwing hovering with the same kinematics, the efficiency of tandem-wing hovering is increased by 18.6% and 25.5%, respectively, and the power is reduced by 4.8% and 14.0%, respectively. © 2021, Beihang University Aerospace Knowledge Press. All right reserved.
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  • [1] ELLINGTON C P., The aerodynamics of hovering insect flight. II. Morphological parameters[J], Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences, 305, 1122, pp. 17-40, (1984)
  • [2] ALEXANDER D E., Unusual phase relationships between the forewings and hindwings in flying dragonflies, Journal of Experimental Biology, 109, 1, pp. 379-383, (1984)
  • [3] USHERWOOD J R, LEHMANN F O., Phasing of dragonfly wings can improve aerodynamic efficiency by removing swirl, Journal of the Royal Society, Interface, 5, 28, pp. 1303-1307, (2008)
  • [4] AZUMA A, WATANABE T., Flight performance of a dragonfly, Journal of Experimental Biology, 137, 1, pp. 221-252, (1988)
  • [5] LI Q S, ZHENG M Z, PAN T, Et al., Experimental and numerical investigation on dragonfly wing and body motion during voluntary take-off, Scientific Reports, 8, 1, (2018)
  • [6] ANDERSON R C., Do dragonflies migrate across the western Indian Ocean?, Journal of Tropical Ecology, 25, 4, pp. 347-358, (2009)
  • [7] SUN M, WU J H., Biomimetic aerodynamics of micro-air vehicles: aerodynamic force and power requirements in forward flight of insect, Acta Aeronautica et Astronautica Sinica, 23, 5, pp. 385-393, (2002)
  • [8] ZHANG R, ZHOU C Y, WANG C, Et al., Aerodynamic characteristics of dragonfly in asymmetric flapping, Acta Aeronautica et Astronautica Sinica, 38, 12, (2017)
  • [9] WU J H, ZHOU C, ZHANG Y L., Aerodynamic power efficiency comparison of various micro-air-vehicle layouts in hovering flight, AIAA Journal, 55, 4, pp. 1265-1278, (2016)
  • [10] SUN M, LAN S L., A computational study of the aerodynamic forces and power requirements of dragonfly (Aeschna Juncea) hovering, Journal of Experimental Biology, 207, 11, pp. 1887-1901, (2004)
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