Preliminary analysis of nonlinearity in F/A-18E/F noise propagation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

Analyses of recent F/A-18E/F military power and afterburner measurements suggest that the noise propagation is nonlinear in the far field. Spectral broadening takes place as the radiated noise propagates from IS to 150 m, the limits of the measurement range. This broadening phenomenon cannot be readily explained in terms of linear propagation effects. Calculation of a nonlinearity indicator derived by Howell and Morfey supports the assertion that nonlinear propagation effects are present. Furthermore, skewness and kurtosis calculations indicate that the noise data distributions are non-Gaussian over the propagation range at these engine settings. Finally, the measured spectra have been compared against predictions obtained with existing nonlinear spectral evolution methods. Even though the prediction results compare poorly with the actual measurements, this is attributable to limitations of the spectral evolution methods themselves.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages2343-2353
Number of pages11
ISBN (Print)1563477130, 9781563477133
DOIs
StatePublished - Jan 1 2004
EventCollection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference - Manchester, United Kingdom
Duration: May 10 2004May 12 2004

Publication series

NameCollection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
Volume3

Other

OtherCollection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
CountryUnited Kingdom
CityManchester
Period5/10/045/12/04

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Gee, K. L., Gabrielson, T. B., Atchley, A. A., & Sparrow, V. W. (2004). Preliminary analysis of nonlinearity in F/A-18E/F noise propagation. In Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference (pp. 2343-2353). [AIAA 2004-3009] (Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference; Vol. 3). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2004-3009