Nonlinearity analysis of model-scale jet noise

Kent L. Gee, Anthony A. Atchley, Lauren E. Falco, Micah R. Shepherd

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

5 Scopus citations

Abstract

This paper describes the use of a spectrally-based "nonlinearity indicator "to complement ordinary spectral analysis of jet noise propagation data. The indicator, which involves the cross spectrum between the temporal acoustic pressure and the square of the acoustic pressure, stems directly from ensemble averaging the generalized Burgers equation. The indicator is applied to unheated model-scale jet noise from subsonic and supersonic nozzles. The results demonstrate how the indicator can be used to interpret the evolution of power spectra in the transition from the geometric near to far field. Geometric near-field and nonlinear effects can be distinguished from one another, thus lending additional physical insight into the propagation.

Original languageEnglish (US)
Title of host publicationNonlinear Acoustics
Subtitle of host publicationState-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics
Pages307-310
Number of pages4
Edition1
DOIs
StatePublished - May 1 2012

Publication series

NameAIP Conference Proceedings
Number1
Volume1474
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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  • Cite this

    Gee, K. L., Atchley, A. A., Falco, L. E., & Shepherd, M. R. (2012). Nonlinearity analysis of model-scale jet noise. In Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics (1 ed., pp. 307-310). (AIP Conference Proceedings; Vol. 1474, No. 1). https://doi.org/10.1063/1.4749357