Method for separating shock wave motion and turbulence in LDV measurements

C. W. Palko, J. C. Dutton

Research output: Contribution to journalArticlepeer-review

Abstract

Two-component laser Doppler velocimetry (LDV) measurements were made in a planar, two-dimensional flow containing an unsteady oblique shock wave formed by the convergence of two supersonic streams past a thick plate. High-speed wall pressure measurements locate the shock wave and, consequently, allow separation of the effects of shock wave motion from the turbulence fluctuations in the LDV measurements of the shock-separated free shear layer. In the current flow isolating the large-scale changes in the position of the shock from the turbulence primarily reduces the experimental scatter rather than significantly changing the shapes or magnitudes of the turbulent stress profiles. Changes in the direction of shock motion do not significantly affect the mean velocity, but do affect the turbulent stresses.

Original languageEnglish (US)
Pages (from-to)358-370
Number of pages13
JournalExperiments in Fluids
Volume26
Issue number4
DOIs
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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