Identifying the most energetic modes of the pressure near-field region of a Mach 0.85 axisymmetric jet

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

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

4 Scopus citations

Abstract

The near-field pressure region of a Mach 0.85 axisymmetric jet with an exit nozzle diameter of 50.8mm, is examined experimentally using an azimuthal array of 15 equidistantly spaced (24°) transducers positioned just outside the jet shear layer. The exit flow temperature is held constant at a temperature of 27°C, and is pressure and temperature balanced with ambient conditions. The transducer array is traversed downstream through the end of the potential core. Examination of the Fourier-azimuthal decomposition reveals the presence of only the first three modes (0,1, &2), with a downstream contribution of low-frequency energy only. A second set of experiments fixes 7 transducers, spaced at (48°) in azimuth, near the jet exit at z/D=0.875. A separate azimuthal array is then fitted with another 7 transducers, positioned in similar fashion, and again traversed downstream through the end of the potential core. The cross-correlations between the array fixed at the jet lip and the downstream array, exhibit magnitudes on the order of 60%, extending through the end of the potential core where the correlation falls to 20%. The modal decomposition of the cross-correlations suggest a column mode dominance. The decay in magnitude is in direct relation with the decay in the contribution of mode-0.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Pages3752-3760
Number of pages9
ISBN (Print)1563478072, 9781563478079
DOIs
StatePublished - Jan 1 2006
Event44th AIAA Aerospace Sciences Meeting 2006 - Reno, NV, United States
Duration: Jan 9 2006Jan 12 2006

Publication series

NameCollection of Technical Papers - 44th AIAA Aerospace Sciences Meeting
Volume6

Other

Other44th AIAA Aerospace Sciences Meeting 2006
CountryUnited States
CityReno, NV
Period1/9/061/12/06

ASJC Scopus subject areas

  • Aerospace Engineering
  • Space and Planetary Science

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    Hall, A. M., Pinier, J. T., Hall, J. W., & Glauser, M. N. (2006). Identifying the most energetic modes of the pressure near-field region of a Mach 0.85 axisymmetric jet. In Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting (pp. 3752-3760). (Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting; Vol. 6). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2006-314