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SUMMARY:Fluid-structure interactions of membrane wings - Prof. Bharat Gana
 pathisubramani
DTSTART:20160513T120000Z
DTEND:20160513T130000Z
UID:TALK64844@talks.cam.ac.uk
CONTACT:Antoine Debugne
DESCRIPTION:Natural fliers achieve exceptional aerodynamics by continuous 
 adjustments of their geometry through a mix of dynamic wing compliance and
  distributed sensing and actuation. This enables them to routinely perform
  a wide range of manoeuvres including rapid turns\, rolls\, dives\, and cl
 imbs with seeming ease.  \nThis suggests that the use of active and passiv
 e compliant wings will enhance the aeromechanics of a Micro Air Vehicle (M
 AV).  In this talk\, I will present some experimental results that show th
 e superior aerodynamic performance of passive membrane wings compared to t
 raditional rigid wings. Membrane wings show higher lift and higher or comp
 arable efficiency due to flow-induced cambering and unsteady oscillations 
 of the membrane. Simultaneous force\, membrane vibration and velocity fiel
 d measurements reveal that the force fluctuations are coupled to mode shap
 es in the membrane that are caused by passage of vortices over the top sur
 face of wing. This fluid-structure coupling suggests that it might be poss
 ible to tune the material properties on-the-fly to realize “on-demand”
  aerodynamic performance. Our preliminary attempts at tailoring the aerody
 namic performance using electroactive membranes will also be shown. This o
 pens the possibility of using electroactive membrane wings for flight cont
 rol. \n
LOCATION:LR3A\, Inglis Building\, CUED.
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