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SUMMARY:Turbulence interaction noise mechanisms and their reduction with p
 orous media - Luke Bowen (University of Bristol)
DTSTART:20220606T140000Z
DTEND:20220606T150000Z
UID:TALK174215@talks.cam.ac.uk
CONTACT:Alistair Hales
DESCRIPTION:This presentation covers some previously unreported observatio
 ns in aerofoil turbulence interaction noise experimentation\, which aid th
 e development of noise reduction strategies. Through detailed velocity\, u
 nsteady surface pressure and far-field noise measurements\, the noise gene
 ration can be traced from the turbulent inflow to the far-field noise. Fur
 ther understanding has been gained from studying flows of varying turbulen
 ce intensity and length scale\, resulting in the identification of the phy
 sical changes that affect the far-field noise. The implementation of a por
 ous structure with a set volume in the leading edge region of the aerofoil
  is understood to reduce the far-field noise. Optimisation of the porous s
 tructure for noise reduction is a more difficult task due to the number of
  control parameters. However\, experimental observations contribute to the
  understanding of porous structures for the reduction of turbulence intera
 ction noise.  
LOCATION:MR20
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