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

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 emit...

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Bibliographic Details
Main Authors: Hoffmann, A. (Author) , Zimmermann, Frank Peter (Author) , Scharr, H. (Author) , Krömker, Susanne (Author) , Schulz, C. (Author)
Format: Article (Journal)
Language:English
Published: 01 January 2005
In: Applied physics. B, Lasers and optics
Year: 2005, Volume: 80, Issue: 1, Pages: 125-131
ISSN:1432-0649
DOI:10.1007/s00340-004-1670-8
Online Access:Verlag, Volltext: http://dx.doi.org/10.1007/s00340-004-1670-8
Verlag, Volltext: https://link.springer.com/article/10.1007/s00340-004-1670-8
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Author Notes:A. Hoffmann, F. Zimmermann, H. Scharr, S. Krömker, C. Schulz
Description
Summary: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.
Item Description:Published online: 26 October 2004
Gesehen am 14.03.2018
Physical Description:Online Resource
ISSN:1432-0649
DOI:10.1007/s00340-004-1670-8

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