The role of nonlinear effects in the propagation of noise from high-power jet aircraft

Kent L. Gee, Victor W. Sparrow, Michael M. James, J. Micah Downing, Christopher M. Hobbs, Thomas B. Gabrielson, Anthony A. Atchley

Research output: Contribution to journalArticle

85 Scopus citations

Abstract

To address the question of the role of nonlinear effects in the propagation of noise radiated by high-power jet aircraft, extensive measurements were made of the F-22A Raptor during static engine run-ups. Data were acquired at low-, intermediate-, and high-thrust engine settings with microphones located 23-305 m from the aircraft along several angles. Comparisons between the results of a generalized-Burgers-equation-based nonlinear propagation model and the measurements yield favorable agreement, whereas application of a linear propagation model results in spectral predictions that are much too low at high frequencies. The results and analysis show that significant nonlinear propagation effects occur for even intermediate-thrust engine conditions and at angles well away from the peak radiation angle. This suggests that these effects are likely to be common in the propagation of noise radiated by high-power aircraft.

Original languageEnglish (US)
Pages (from-to)4082-4093
Number of pages12
JournalJournal of the Acoustical Society of America
Volume123
Issue number6
DOIs
StatePublished - Jun 17 2008

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics

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