Noise-source separation techniques for the extraction of the sub-dominant combustion noise from the total noise signatures obtained in static-engine tests are described. Three methods are applied to data from a static, full-scale engine test. Both 1/3-octave and narrow-band results are discussed. The results are used to assess the combustion-noise prediction capability of the Aircraft Noise Prediction Program (ANOPP). A new additional phase-angle-based discriminator for the three-signal method is also introduced.
Noise-Source Separation Using Internal and Far-Field Sensors for a Full-Scale Turbofan Engine
15th Aeroacoustics Conference (30th AIAA Aeroacoustics Conference) ; 2009 ; Miami, FL, United States
2009-11-01
Report
No indication
English
Turbofan-engine noise suppression
AIAA | 1966
|Turbofan-engine noise suppression.
AIAA | 1968
|