Effects of boattailing on the turbulence structure of a compressible base flow

C. J. Bourdon, J. C. Dutton

Research output: Contribution to conferencePaperpeer-review

Abstract

The large-scale turbulent structures in the near wake of a boattailed, axisymmetric afterbody immersed in a supersonic flow are examined using a planar Mie/Rayleigh scattering visualization technique. Seven key regions in the near wake are studied in both side-and end-view orientations. Estimates of the mean structure size, shape, and inclination are made using spatial correlation analysis, and the effects of the turbulent structures' passage are measured via steadiness and convolution analysis techniques. The results indicate that base drag is decreased by afterbody boattailing because the turbulent structures are generally less active in the separated flow region and, as a result, shear layer growth is suppressed. The latter result occurs because the large-scale turbulent structures are further inclined down toward the mean flow direction, and tend to be organized more in the streamwise than in the spanwise direction near the base.

Original languageEnglish (US)
DOIs
StatePublished - 2000
EventFluids 2000 Conference and Exhibit - Denver, CO, United States
Duration: Jun 19 2000Jun 22 2000

Other

OtherFluids 2000 Conference and Exhibit
CountryUnited States
CityDenver, CO
Period6/19/006/22/00

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy Engineering and Power Technology
  • Aerospace Engineering
  • Mechanical Engineering

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