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    Effects of vane/blade ratio and spacing on fan noise, volume 1 (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The 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.
    Keywords: ACOUSTICS
    Type: NASA-CR-174664 , NAS 1.26:174664 , GE-84SRD006-VOL-1
    Format: application/pdf
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