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Applied Physics B

, Volume 80, Issue 1, pp 125–131 | Cite as

Instantaneous three-dimensional visualization of concentration distributions in turbulent flows with crossed-plane laser-induced fluorescence imaging

  • A. Hoffmann
  • F. Zimmermann
  • H. Scharr
  • S. Krömker
  • C. SchulzEmail author
Article

Abstract

A laser-based technique for measuring instantaneous three-dimensional species concentration distributions in turbulent flows is presented. The laser beam from a single laser is formed into two crossed light sheets that illuminate the area of interest. The laser-induced fluorescence (LIF) signal emitted from excited species within both planes is detected with a single camera via a mirror arrangement. Image processing enables the reconstruction of the three-dimensional data set in close proximity to the cutting line of the two light sheets. Three-dimensional intensity gradients are computed and compared to the two-dimensional projections obtained from the two directly observed planes. Volume visualization by digital image processing gives unique insight into the three-dimensional structures within the turbulent processes. We apply this technique to measurements of toluene-LIF in a turbulent, non-reactive mixing process of toluene and air and to hydroxyl (OH) LIF in a turbulent methane-air flame upon excitation at 248 nm with a tunable KrF excimer laser.

Keywords

Large Eddy Simulation Light Sheet Intensity Gradient Probability Density Function Source Plane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • A. Hoffmann
    • 1
  • F. Zimmermann
    • 1
  • H. Scharr
    • 2
  • S. Krömker
    • 3
  • C. Schulz
    • 4
    Email author
  1. 1.Physikalisch-Chemisches InstitutUniversität HeidelbergHeidelbergGermany
  2. 2.ICG-IIIForschungszentrum JülichJülichGermany
  3. 3.IWRUniversität HeidelbergHeidelbergGermany
  4. 4.IVGUniversität Duisburg-EssenDuisburgGermany

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