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  • Acoustics  (1)
  • STRUCTURAL MECHANICS
  • 1995-1999  (1)
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    Evaluation of the Tone Fan Noise Design/Prediction System (TFaNS) at the NASA Glenn Research Center (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: Version 1.4 of TFaNS, the Tone Fan Noise Design/Prediction System. has recently been evaluated at the NASA Glenn Research Center. Data from tests of the Allison Ultra High Bypass Fan (UHBF) were used to compare to predicted farfield directivities for the radial stator configuration. There was good agreement between measured and predicted directivities at low fan speeds when rotor effects were neglected in the TFaNS calculations. At higher fan speeds, TFaNS is shown to be useful in predicting overall trends rather than absolute sound pressure levels.
    Keywords: Acoustics
    Type: E-12011
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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