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SUMMARY:An Analytic Solution for Gust-Cascade Interaction Noise Including 
 Effects of Realistic Aerofoil Geometry - Peter Baddoo\, DAMTP
DTSTART:20170518T100000Z
DTEND:20170518T110000Z
UID:TALK72263@talks.cam.ac.uk
CONTACT:David Baker
DESCRIPTION:This talk presents an analytic solution for the sound generate
 d by rotor-stator interaction for aerofoils with small (but non-zero) camb
 er and thickness. The interaction is modelled as an unsteady gust incident
  on an infinite rectilinear cascade of staggered aerofoils in background s
 teady uniform flow at small angles of attack using Rapid Distortion Theory
 . The solution significantly extends previous analytical work that is rest
 ricted to flat plates or only calculates the far-upstream radiation\, and 
 can give insight into the role played by blade geometry on the acoustic fi
 eld both upstream and downstream of the cascade. The steady solution for t
 he mean flow is required in order to solve the unsteady interaction equati
 on governing the acoustic field\, which is performed using the Wiener-Hopf
  technique. Results for the unsteady loading are presented and compared wi
 th existing results for flat plates to investigate the effects of realisti
 c geometry.
LOCATION:CMS\, MR11
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