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http://dx.doi.org/10.5407/JKSV.2010.8.2.016

Flow Visualization on the Bio-Mimic Model of Dragonfly  

Yun, Jun-Yong (한라대학교 기계자동차공학부(학부))
Uhm, Sang-Jin (한라대학교 기계자동차공학부(학부))
Ji, Young-Moo (한국과학기술원 기계공학과(원))
Park, Jun-Sang (한라대학교 기계자동차공학부)
Publication Information
Journal of the Korean Society of Visualization / v.8, no.2, 2010 , pp. 16-22 More about this Journal
Abstract
A flow visualization has been conducted to investigate unsteady flight characteristics of a model of dragonfly. The mechanism of lift generation by flapping wings is analyzed using smoke-wire and high speed camera. The experimental results of flow visualization show a discernible sequential dynamics that three mechanisms and high incidence angle of the wings are responsible for the lift generation. The leading edge vortex by the rapid acceleration of leading edge of the wing during initial stage of stroke causes a strong lift enhancement. Delayed stall during the stroke, fast supination and pronation of the wing near the end of each stroke are also responsible for the lift generation.
Keywords
Dragonfly; Flapping; Flow Visualization; Insect Flight;
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