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Volume 42 Issue 6
Jun.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(6): 1271-1278.
GAO Qian, ZHENG Mengzong, LI Zhiping, et al. Experimental study on flight performance of dragonfly during climbing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(6): 1271-1278. doi: 10.13700/j.bh.1001-5965.2015.0374(in Chinese)
Citation: GAO Qian, ZHENG Mengzong, LI Zhiping, et al. Experimental study on flight performance of dragonfly during climbing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(6): 1271-1278. doi: 10.13700/j.bh.1001-5965.2015.0374(in Chinese)
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Experimental study on flight performance of dragonfly during climbing

doi: 10.13700/j.bh.1001-5965.2015.0374

  • School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 08 Jun 2015
  • Publish Date: 20 Jun 2016
    Abstract
  • The flight performances of insects in free flight are very important for the research of the bionic fluid mechanics. The movement law and dynamic characteristics of dragonfly Pantala flavescens during climbing flight in two different flying angles are investigated using high-speed videography. We induced the dragonfly climbing according to the phototaxis of the fliers. Two high-speed cameras with orthogonal axes are used. The body and wings kinematics of dragonflies are captured accurately by feature points matching and three-dimensional reconstruction and the flight performance is studied. The experimental results show that the lift of the flier is lager than the thrust during high-incidence climbing and maximum flapping amplitude of the dragonfly during high-incidence climbing is 40% bigger than that during low-incidence climbing; the flapping frequency of high-incidence climbing is 3.3 Hz more than that of low-incidence climbing and the phase difference of high-incidence climbing is 20° smaller than that of the other. The pitch angle of the body during high-incidence climbing is larger than normal, which is controlled by the front inclination angle of forewing. This body attitude can generate larger lift force.

     

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