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Evaluation of the Tone Fan Noise Design/Prediction System (TFaNS) at the NASA Glenn Research CenterVersion 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.
Document ID
20000014308
Acquisition Source
Glenn Research Center
Document Type
Other
Authors
Koch, L. Danielle (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
December 1, 1999
Subject Category
Acoustics
Report/Patent Number
E-12011
Funding Number(s)
PROJECT: RTOP 522-81-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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