On the use of Tailored Permeable Surfaces for Turbulence Interaction Noise Control

Luke Bowen, Alper Celik, Mahdi Azarpeyvand, Carlos R. Illario da Silva

Research output: Contribution to conferenceConference Paper

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Abstract

Turbulence interaction noise reduction using porous leading edges has been investigated experimentally. The effect of having a porous leading edge on the aeroacoustic characteristics of an additive manufactured NACA 0012 profile were investigated using leading edges manufactured from commercial metal foams and leading edges which are additive manufactured at a Reynolds number of 2.6 x 10^5. The first 10% of the airfoil is interchangeable with the multiple porous cases tested. The additive manufactured NACA 0012 profile shows a good agreement between experimental pressure coefficient values and XFoil predictions, and the interaction noise radiates well above the background of the jet. The turbulent inflow is generated by a grid placed within the contraction nozzle. The effect of the investigated leading edges are quantified in terms of the radiated far-field noise and are compared to the results of a solid leading edge. It showed that far-field noise was reduced for low frequency in all cases, although some suffer a larger high frequency penalty than others. A porous leading edge with a cover appears to abate this increase in high frequency noise and show little detrimental effect to the hydrodynamic field of the solid part of the airfoil at low angles of attack.
Original languageEnglish
DOIs
Publication statusE-pub ahead of print - 8 Jun 2020
EventAIAA Aviation Forum 2020 - Online, United States
Duration: 15 Jun 202019 Jun 2020
https://www.aiaa.org/aviation

Conference

ConferenceAIAA Aviation Forum 2020
CountryUnited States
Period15/06/2019/06/20
Internet address

Keywords

  • airfoil
  • leading edge
  • Turbulence interaction noise
  • turbulence impingement
  • aeroacoustics
  • aerodynamics
  • Porous
  • permeable materials
  • tailored structures
  • 3D printing/rapid prototyping materials
  • leading edge noise
  • leading edge porous

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