Far field radiation of rotor-stator interactions tones from an annular duct

Title

Far field radiation of rotor-stator interactions tones from an annular duct

 Author

Krishnappa, G.
Jones, L.R.

Institution

National Research Council Canada, Division of Mechanical Engineering

 Date

1973-04-30

 Abstract

An expression is derived to calculate the directivity of the far field sound pressure levels radiated from an annular duct based on Tyler and Sofrin's approach for a circular duet. Both radial and circumferential variations in the acoustic pressure field inside the duct are considered in the derivation. A computer programme to calculate the generation, propagation and far field radiation of tones from a single stage ducted fan is described. Some illustrative examples are worked out to show the effect of hub/tip ratio on the far field directivity. Computed results for the cases considered in Tyler and Sofrin 's paper are in close agreement.

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 Publisher

National Research Council Canada

 Access restriction

Campus only

 Source

National Research Council Aeronautical Report LR 568, NRC 13260

 Part of collection

Aerospace Engineering Reports

 Document type

report

 Rights

(c) 1973 National Research Council Canada
Files
PDF LR-568.pdf 6.64 MB
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