Skip to main content
padlock icon - secure page this page is secure

Reduction of Turbulence Interaction Noise Through Airfoils With Perforated Leading Edges

Buy Article:

$30.00 + tax (Refund Policy)

With the aim of reducing turbulence interaction noise of axial fans, a wind tunnel study was performed on airfoils equipped with a flow permeable leading edge. The leading edges were realized as bulk materials with round pores and manufactured using rapid prototyping. The inflow turbulence was generated by a turbulence grid. Acoustic measurements were performed using microphone array technology, while simultaneously the aerodynamic performance was captured with a wind tunnel balance. In order to provide insight on the flow phenomena at the perforated leading edges, a RANS simulation was performed. The results show that a noticeable noise reduction up to 8 dB is possible in a frequency range between 1 kHz and 4 kHz, while for leading edges with large pores additional high frequency noise is generated. At low geometric angles of attack from 0° to 8°, the aerodynamic performance of the modified airfoils is the same as for a reference airfoil with solid leading edge. At higher angles of attack the perforated leading edges lead to an aerodynamic penalty.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: January 1, 2019

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Information for Advertisers
  • Online User License
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more