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Effects of vane/blade ratio and spacing on fan noise, volume 1The noise characteristics of a high-speed fan were studied. The experimental investigation was carried out on a 50.8 cm (20 in.) diameter scale model fan stage in an anechoic chamber with an inflow turbulence control screen installed. The forty-four blade rotor was tested with forty-eight vane and eighty-six vane stator rows, over a range of aixal rotor-stator spacings from 0.5 to 2.3 rotor tip chords. A two-dimensional strip theory model of rotor-stator interaction noise was employed to predict the measured tone power level trends, and good overall agreement with measured trends was obtained.
Document ID
19850011481
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Gliebe, P. R. (GE Cincinnati, United States)
Kantola, R. A. (General Electric Co. Schenectady, NY, United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1983
Subject Category
Acoustics
Report/Patent Number
GE-84SRD006-VOL-1
NAS 1.26:174664
NASA-CR-174664
Accession Number
85N19791
Funding Number(s)
CONTRACT_GRANT: NAS3-22062
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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