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Analytical study of the effects of wind tunnel turbulence on turbofan rotor noiseAn analytical study of the effects of wind tunnel turbulence on turbofan rotor noise was carried out to evaluate the effectiveness of the NASA Ames 40 by 80-foot wind tunnel in simulating flight levels of fan noise. A previously developed theory for predicting rotor/turbulence interaction noise, refined and extended to include first-order effects of inlet turbulence anisotropy, was employed to carry out a parametric study of the effects of fan size, blade number, and operating line for outdoor test stand, NASA Ames wind tunnel, and flight inlet turbulence conditions. A major result of this study is that although wind tunnel rotor/turbulence noise levels are not as low as flight levels, they are substantially lower than the outdoor test stand levels and do not mask other sources of fan noise.
Document ID
19800051808
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gliebe, P. R.
(General Electric Co., Aircraft Engine Group, Cincinnati Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
June 1, 1980
Subject Category
Acoustics
Report/Patent Number
AIAA PAPER 80-1022
Meeting Information
Meeting: Aeroacoustics Conference
Location: Hartford, CT
Start Date: June 4, 1980
End Date: June 6, 1980
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
80A35978
Funding Number(s)
CONTRACT_GRANT: NAS2-10002
Distribution Limits
Public
Copyright
Other

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