Wavelet statistics of the near-field structure of a coaxial jet

Jacques Lewalle, Paolo Petagna, Guido Buresti

Research output: Contribution to conferencePaperpeer-review

4 Scopus citations


In this study, we examine the dynamical role of the flow structures in the near field of a large-Reynolds-number coaxial jet. The experimental data consist of 2-component laser-Doppler and hot-wire anemometry records. Some flow statistics are obtained by conventional methods, but the intermittent active structures are identified by using the spectral/temporal discrimination capability of wavelet transforms. We focus on the size, intermittency and amplitude of these structures, and on their role in the instantaneous and mean radial flux of momentum. In contrast to the crossspectra, the wavelet approach provides a very clear picture of the relevant length scales.

Original languageEnglish (US)
StatePublished - 1994
EventAIAA Fluid Dynamics Conference, 1994 - Colorado Springs, United States
Duration: Jun 20 1994Jun 23 1994


OtherAIAA Fluid Dynamics Conference, 1994
Country/TerritoryUnited States
CityColorado Springs

ASJC Scopus subject areas

  • Aerospace Engineering
  • Engineering (miscellaneous)


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