The objective of this study was to experimentally investigate the broadband trailing edge noise generated by a sharp trailing edge geometry and an asymmetric blunt edge. The flow field in the vicinity of the sharp trailing edge was found to be equivalent to that of a flat plate turbulent boundary layer. The interaction of the two boundary layers with the edge was responsible for broadband noise generation. The blunt trailing edge geometry exhibited additional complexity, with turbulent boundary layer separation and sound generated by vortex shedding. The measurement program included hot-wire anemometry, unsteady surface pressure, and radiated sound utilizing two microphone arrays. The boundary layer parameters and wall pressure spectra were used to compute the radiated sound from existing scattering theory. These calculations agreed very well with the array data, with differences typically within 2dB over the frequency range considered valid for the theory.
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ASME 2008 Noise Control and Acoustics Division Conference
July 28–30, 2008
Dearborn, Michigan, USA
Conference Sponsors:
- Noise Control and Acoustics Division
ISBN:
0-7918-4839-6
PROCEEDINGS PAPER
Trailing Edge Noise From Blunt and Sharp Edge Geometries
Daniel W. Shannon,
Daniel W. Shannon
University of Notre Dame, Notre Dame, IN
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Scott C. Morris,
Scott C. Morris
University of Notre Dame, Notre Dame, IN
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William K. Blake
William K. Blake
University of Notre Dame, Notre Dame, IN
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Daniel W. Shannon
University of Notre Dame, Notre Dame, IN
Scott C. Morris
University of Notre Dame, Notre Dame, IN
William K. Blake
University of Notre Dame, Notre Dame, IN
Paper No:
NCAD2008-73052, pp. 111-118; 8 pages
Published Online:
June 22, 2009
Citation
Shannon, DW, Morris, SC, & Blake, WK. "Trailing Edge Noise From Blunt and Sharp Edge Geometries." Proceedings of the ASME 2008 Noise Control and Acoustics Division Conference. ASME 2008 Noise Control and Acoustics Division Conference. Dearborn, Michigan, USA. July 28–30, 2008. pp. 111-118. ASME. https://doi.org/10.1115/NCAD2008-73052
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