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SUMMARY:Towards a model of a deformable aerofoil - Mark Blyth (University 
 of East Anglia)
DTSTART:20191205T160000Z
DTEND:20191205T170000Z
UID:TALK135727@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:Aerofoils that include flexible components are designed to enh
 ance aerodynamic facility and to promote fuel efficiency under a range of 
 different flight conditions. Some small\, unmanned aerial vehicles (UAVs) 
 use entirely collapsible\, elastic wings with a view to ready portability.
  In this talk we work toward a model of a wholly deformable aerofoil\, con
 sidered as a thin-walled elastic cell placed into a uniform stream. We use
  a conformal mapping approach to determine the cell shape and the ambient 
 flow simultaneously. Our initial analysis of a light cell in an oncoming f
 low can be viewed as a generalisation of Flaherty et al.&#39\;s 1972 work 
 on the buckling of an elastic cell under a constant transmural pressure di
 fference. Introducing cell mass and circulation/lift\, we study equilibriu
 m shapes at different flow speeds and for different transmural pressure ju
 mps. A fixed-angle corner at the trailing edge is introduced by way of a K
 arman-Trefftz conformal mapping\, and an internal strut is included\, to m
 ore accurately mimic the shape and aerodynamic properties of a traditional
 \, rigid aerofoil. DNS simulations are carried out to assess the performan
 ce of the equilibrium aerofoil shapes in a real flow.
LOCATION:Seminar Room 2\, Newton Institute
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