Journal of Visualization

, Volume 7, Issue 3, pp 217–224 | Cite as

Real-time color holographic interferometry devoted to 2D unsteady wake flows

  • Desse J. M. 
  • Albe F. 
  • Tribillon J. L. 
Article

Abstract

A new optical technique based on real time holographic interferometry in true colors has been implemented around the transonic wind tunnel of the ONERA-Lille center to analyze 2D unsteady wake flows. Tests realized in color interferometry, real time and double exposure, use simultaneously three wavelengths of a continuous waves laser (argon and krypton mixed) and holograms are recorded on silver-halide single-layer panchromatic Slavich PFG03c plates. The very principle of real-time true color holographic interferometry uses three primary wavelengths (red, green and blue) to record, under no-flow conditions, the interference among the three measurement beams and the three reference beams simultaneously on a single reference hologram. After the holographic plate is developed, it is placed on the test setup again in the position it occupied during exposure and the hologram is illuminated again by the three reference beams and three measurement beams. A flat, uniform color can then be observed behind the hologram. So a horizontal, vertical, or even circular fringe pattern can be formed and the achromatic central fringe can be made out very clearly. The single color is used to determine the path difference zero on the interferograms. The flow studied was the unsteady flow downstream of a cylinder placed crosswise in the test section. A sequence of hundred interferograms was recorded on the flow around the cylinder at Mach 0.37. The vortex formation and dissipation phases can be seen very clearly, along with the fringe beat to either side of the cylinder.

Keywords

Color Holography Interferometry High Speed Flow Gas Density Field 

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References

  1. Desse, J. M., Instantaneous density measurement in two-dimensional gas flow by high speed differential interferometry, Experiment in Fluid, 9 (1990), 85–91.CrossRefGoogle Scholar
  2. Desse J.M., Recording and processing of interferograms by spectral characterization of the interferometric setup, Experiment in Fluid, 23 (1997), 256–271.Google Scholar
  3. Desse, J. M., Albe, F. and Tribillon, J.L., Real-color holographic interferometry, Applied Optics, 41–25 (2002), 5326–5333.CrossRefGoogle Scholar
  4. Desse, J. M., Three-color differential interferometry, Applied Optics, 36–28 (1997), 7150–7156.CrossRefGoogle Scholar
  5. Surget, J., Etude quantitative d’un écoulement aérodynamique, La Recherche Aérospatiale, 3 (1973), 167–171.Google Scholar
  6. Heflinger, L.O., Wuerker, R.F. and Brooks, R.E., Double exposure holographic interferometry, Bul. Am. Phys. Soc., II-10 (1965), 1187–1190.Google Scholar
  7. Powell, R.L. and Stetson K., Interferometric vibration analysis of three dimensional objects by wavefront reconstruction, J. Opt. Soc. Am. 55 (1965), 612–615.CrossRefGoogle Scholar
  8. Stetson K. and Powell R.L., Interferometric hologram evaluation and real-time vibration analysis of diffuse objects, J. Opt. Soc. Am. 55 (1965), 1694–1695.CrossRefGoogle Scholar

Copyright information

© The Visualization Society of Japan 2004

Authors and Affiliations

  • Desse J. M. 
    • 1
  • Albe F. 
    • 2
  • Tribillon J. L. 
    • 3
  1. 1.Office National d’Etudes et Recherches AérospatialesCentre de LilleLilleFrance
  2. 2.Institut Franco-allemand de Recherches de Saint-LouisSaint-LouisFrance
  3. 3.Direction des Systèmes de Forces et de la ProspectiveService Recherche Etude AmontParis CedexFrance

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