A spatio-temporal decomposition of the acoustic source in a mach 0.85 jet

Joseph W. Hall, Jeremy T. Pinier, André M. Hall, Mark N Glauser

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

4 Citations (Scopus)

Abstract

Multi-point measurements of the near-field pressure around the periphery of a cold Mach 0.85 round jet were performed simultaneously with far-field acoustic pressure measurements to examine the spatial and temporal character of the acoustic source in the jet. A Fourier decomposition of the near-field pressure indicates that the majority of the energy is relatively evenly split between azimuthal modes 0 and 1. Only azimuthal mode 0, however, made a significant contribution to the near-field/far-field pressure cross-spectrum indicating that the acoustic source in the jet is axisymmetric. The largest contribution of azimuthal mode 0 was for low wavenumbers commonly associated with hydrodynamic pressure fluctuations, indicating that large, low frequency hydrodynamic fluctuations are hiding the dominant acoustic source in the jet.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Pages5301-5313
Number of pages13
Volume8
StatePublished - 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: Jan 8 2007Jan 11 2007

Other

Other45th AIAA Aerospace Sciences Meeting 2007
CountryUnited States
CityReno, NV
Period1/8/071/11/07

Fingerprint

Mach number
pressure field
acoustics
Acoustics
decomposition
Decomposition
near fields
far fields
Acoustic field measurement
Hydrodynamics
hydrodynamics
pressure measurement
Pressure measurement
low frequencies
energy

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Hall, J. W., Pinier, J. T., Hall, A. M., & Glauser, M. N. (2007). A spatio-temporal decomposition of the acoustic source in a mach 0.85 jet. In Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting (Vol. 8, pp. 5301-5313)

A spatio-temporal decomposition of the acoustic source in a mach 0.85 jet. / Hall, Joseph W.; Pinier, Jeremy T.; Hall, André M.; Glauser, Mark N.

Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting. Vol. 8 2007. p. 5301-5313.

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

Hall, JW, Pinier, JT, Hall, AM & Glauser, MN 2007, A spatio-temporal decomposition of the acoustic source in a mach 0.85 jet. in Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting. vol. 8, pp. 5301-5313, 45th AIAA Aerospace Sciences Meeting 2007, Reno, NV, United States, 1/8/07.
Hall JW, Pinier JT, Hall AM, Glauser MN. A spatio-temporal decomposition of the acoustic source in a mach 0.85 jet. In Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting. Vol. 8. 2007. p. 5301-5313
Hall, Joseph W. ; Pinier, Jeremy T. ; Hall, André M. ; Glauser, Mark N. / A spatio-temporal decomposition of the acoustic source in a mach 0.85 jet. Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting. Vol. 8 2007. pp. 5301-5313
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