Two-point correlations of the near and far-field pressure in a transonic jet

Joseph W. Hall, Jeremy Pinier, André Hall, Mark Glauser

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

9 Scopus citations

Abstract

To better understand the relationship between the near-field pressure and the acoustic far-field, multi-point measurements of the near-field pressure around the periphery of a cold Mach 0.85 round jet are compared to simultaneous multi-point far-field acoustic pressure measurements. The results indicate that the near-field pressure is low dimensional and the instantaneous contribution from both azimuthal mode 0 and 1 is sufficient to accurately recover the dynamics of the near-field pressure. Correlations of the acoustic far-field with the contribution of each azimuthal mode to the near field pressure, however, indicate that only azimuthal mode 0 is well correlated with the far-field pressure, suggesting that the acoustic source in the jet is predom-inantly axisymmetric. The correlation of the higher azimuthal pressure modes with the far-field acoustic pressure is extremely poor suggesting that the axisymmetric source is weakened by the presence of higher azimuthal modes in the near field of the jet.

Original languageEnglish (US)
Title of host publication2006 ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006
StatePublished - Dec 1 2006
Event2006 2nd ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006 - Miami, FL, United States
Duration: Jul 17 2006Jul 20 2006

Publication series

Name2006 ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006
Volume2006

Other

Other2006 2nd ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006
CountryUnited States
CityMiami, FL
Period7/17/067/20/06

ASJC Scopus subject areas

  • Engineering(all)

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    Hall, J. W., Pinier, J., Hall, A., & Glauser, M. (2006). Two-point correlations of the near and far-field pressure in a transonic jet. In 2006 ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006 (2006 ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006; Vol. 2006).