The effect of angle of attack on turbulence interaction noise with a porous leading edge

Luke L Bowen, Alper Celik, Mahdi Azarpeyvand, Michelle Fernandino Westin

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)
73 Downloads (Pure)


The paper is concerned with the effect of angle of attack on the interaction noise between a turbulent flow and a NACA 0012 airfoil. This experimental study considers an airfoil with a porous leading edge up to 10% of the chord and compares the noise levels to a solid airfoil leading edge at a Reynolds number of Re=2.5x10^5. Turbulence is generated by the means of a passive grid and the direct noise measurements are performed using a microphone array. The airfoil is instrumented for both steady and unsteady wall pressure measurements. The Cp distribution over the surface of the airfoil is considered up to large geometric angles of attack for both the solid and porous leading edge cases. From far-field noise measurement, it is found that radiated sound is reduced at small geometric angles of attack at low frequencies for the porous airfoil. At higher angles of attack the Cp distribution of the porous leading edge case appears to be similar with that of a stalled airfoil, suggesting porous leading edges at higher angles of attack stall earlier than a solid airfoil.
Original languageEnglish
Title of host publication28th AIAA/CEAS Aeroacoustics Conference, 2022
Subtitle of host publicationSession: Acoustic/Fluid Dynamics Interactions IX: Misc
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN (Electronic)978-1-62410-664-4
ISBN (Print)9781624106644
Publication statusPublished - 13 Jun 2022
Event28th AIAA/CEAS Aeroacoustics 2022 Conference - United Kingdom, Southampton, United Kingdom
Duration: 14 Jun 202217 Jun 2022

Publication series

NameAIAA/CEAS Aeroacoustics Conference
ISSN (Print)1946-7826


Conference28th AIAA/CEAS Aeroacoustics 2022 Conference
Country/TerritoryUnited Kingdom
Internet address

Bibliographical note

Funding Information:
The first author (L.B.) would like to acknowledge the financial support of Embraer S.A. and EPSRC (Engineering and Physical Sciences Research Council) via Grant No. EP/S013024/1 "Aerodynamics and aeroacoustics of turbulent flows over and past permeable rough surfaces".

Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA., All rights reserved.


  • aeroacoustics
  • Aerodynamic Flows
  • porous media
  • Turbulence interaction noise
  • grid generated turbulence
  • aerodynamic stall


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