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Tubercle Effect
The Tubercle Effect is a recently discovered phenomenon where tubercles or large 'bumps' on the leading edge of an airfoil can improve its aerodynamics. The effect was discovered and analyzed by Dr. Frank E. Fish in the late 2000s. The Tubercle Effect works by channeling flow over the airfoil into more narrow streams, creating higher velocities. Another side effect of these channels is the reduction of flow moving over the wing-tip and resulting in less parasitic drag due to wingtip vortices. Dr. Fish first discovered this effect when looking at the fins of humpback whales. These whales are the only known organisms to take advantage of the Tubercle Effect. It is believed that this effect allows them to be much more maneuverable in the water, allowing for easier capture of prey.
The tiny hooklets on an fore edge of an owl's wing have a similar effect that contributes to its aerodynamic maneuverability and stealth.〔(P. Watts and F. E. Fish, ''The Influence of Passive, Leading Edge Tubercles on Wing Performance' )〕〔("Bumpy whale fins set to spark a revolution in aerodynamics" Loz Blain, March 2008 )〕
==See also==
*Biomimicry
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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