Experimental investigation of trailing edge noise from stationary and rotating airfoils

Branko Zajamšek, Con J. Doolan, Danielle J. Moreau, Jeoffrey Fischer, Zebb D. Prime

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Trailing edge noise from stationary and rotating NACA 0012 airfoils is characterised and compared with a noise prediction based on the semi-empirical Brooks, Pope, and Marcolini (BPM) model. The NACA 0012 is symmetrical airfoil with no camber and 12% thickness to chord length ratio. Acoustic measurements were conducted in an anechoic wind tunnel using a stationary NACA 0012 airfoil at 0° pitch angle. Airfoil self-noise emissions from rotating NACA 0012 airfoils mounted at 0° and 10° pitch angles on a rotor-rig are studied in an anechoic room. The measurements were carried out using microphone arrays for noise localisation and magnitude estimation using beamforming post-processing. Results show good agreement between peak radiating trailing edge noise emissions of stationary and rotating NACA 0012 airfoils in terms of the Strouhal number. Furthermore, it is shown that noise predictions based on the BPM model considering only two dimensional flow effects, are in good agreement with measurements for rotating airfoils, at these particular conditions.

Original languageEnglish
Pages (from-to)3291-3301
Number of pages11
JournalJournal of the Acoustical Society of America
Volume141
Issue number5
DOIs
Publication statusPublished - May 2017

Keywords

  • trailing edge noise
  • stationary and rotating airfoils
  • experimental investigation
  • (BPM) Model
  • rotating NACA 0012 airfoils

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