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发表于 2009-12-26 20:33:26
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来自 英国
http://www.engineering.wright.ed ... /AIAA-2009-1299.pdf
Insects are the undisputed masters of flapping flight in the micro-aerial world. It has been
discovered that they rely on a wide array of unsteady aerodynamic mechanisms such as wake
capture, leading-edge vortex, Weis–Fogh “clap-and-fling” mechanism, etc. to take off, hover,
maneuver, and land. In the current study, we present a direct numerical simulation of a modeled
fruitfly in hovering flight based on realistic morphologies of wing, body, and kinematics. Wingwing
interaction, wing-body interaction, wing-wake interaction, and associated unsteady
aerodynamics are of particular interests in this study. Simulations have shown that the vortex
topologies in flow field are distorted due to the wing-wing interaction during the dorsal stroke
reversal. Unbalanced lift production is observed on both wing and body between the downstroke
and upstroke. Effect of wing kinematics on wing-wing interaction is investigated, too |
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