Some Results of Recent Research on Fan and Jet Noise PUBLIC ACCESS

[+] Author Affiliations
Newell D. Sanders

National Aeronautics and Space Administration, Lewis Research Center, Cleveland, OH

Paper No. 70-WA/GT-15, pp. V001T01A012; 6 pages
  • ASME 1970 Winter Annual Meeting: GT Papers
  • ASME 1970 Winter Annual Meeting: GT Papers
  • New York, New York, USA, November 29–December 3, 1970
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-8004-3
  • Copyright © 1970 by ASME


A 6-ft-dia low-speed fan designed for low-noise production was tested to provide data on noise generation, suppression effects of acoustic treatment, and exhaust jet noise. Preliminary results showed that the overall noise varied with the 5.5 power of the fan speed but was independent of blade loading obtained by varying back pressure at constant speed. The low-velocity jet from the fan produced noise that followed the eighth power law and was lower than predicted by extrapolation of the SAE curve. Modifying the SAE method to eliminate the effects of jet density greatly improved the agreement between prediction and data.

Copyright © 1970 by ASME
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