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SUMMARY:Bio-inspired aerofoil adaptations for the reduction of turbulence 
 interaction noise - Dr Lorna Ayton (DAMTP)
DTSTART:20190503T120000Z
DTEND:20190503T130000Z
UID:TALK123304@talks.cam.ac.uk
CONTACT:Joseph Ibrahim
DESCRIPTION:A dominant source of broadband aeroengine noise arises when th
 e unsteady wakes shed from rotors interact with downstream stators. This s
 o-called leading-edge noise cannot be eliminated\, but it can be reduced. 
 By altering the spanwise geometry of the leading edge of an aerofoil it is
  known through experimental testing that leading-edge noise can be signifi
 cantly reduced over broadband frequencies. In recent years\, a multitude o
 f different shapes have been tested and all are seen to have benefits for 
 different frequency ranges\, which may be ideal for the reduction of tonal
  noise\, but the question remains\; which design is optimal for broadband 
 noise reduction?\n\nThis talk presents a theoretical model for leading-edg
 e noise\, both for straight edges and serrated edges. Through theoretical 
 optimisation\, a set of rules are proposed which lead to an optimal design
  for broadband leading-edge noise reduction. Experimental data on sample n
 ew designs validates the theoretical predictions and illustrates up to an 
 additional 7dB noise reduction verses conventional serrated designs.
LOCATION:JDB Seminar Room\, CUED
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