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 Scopus citations

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
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages5301-5313
Number of pages13
ISBN (Print)1563478900, 9781563478901
DOIs
StatePublished - Jan 1 2007
Event45th AIAA Aerospace Sciences Meeting 2007 - Reno, NV, United States
Duration: Jan 8 2007Jan 11 2007

Publication series

NameCollection of Technical Papers - 45th AIAA Aerospace Sciences Meeting
Volume8

Other

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

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

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    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 (pp. 5301-5313). (Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting; Vol. 8). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2007-442