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Optical Engineering

Performance comparison of background-oriented schlieren and fringe deflection in temperature measurement, part 2: experimental evaluation
Author(s): Alan Blanco; Bernardino Barrientos; Carlos Mares
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Paper Abstract

In part 1 of the study, background-oriented schlieren (BOS) and fringe deflection (FD) were numerically compared when used for the measurement of temperature. The aim of this part is to experimentally corroborate the obtained numerical results. In this regard, we analyze an axisymmetric flame issued by a gas nozzle. Fringe deflection and BOS images are recorded at two different points in time and the corresponding displacement results are compared. Furthermore, we implement a variation of the techniques that allows us to carry out simultaneous displacement measurements by them. In this case, the signals of the techniques are encoded on the RGB channels of a color background image. The results confirm that FD slightly outperforms BOS, in particular for images that contain relatively high temperature gradients or regions with low contrast.

Paper Details

Date Published: 8 June 2016
PDF: 7 pages
Opt. Eng. 55(6) 064104 doi: 10.1117/1.OE.55.6.064104
Published in: Optical Engineering Volume 55, Issue 6
Show Author Affiliations
Alan Blanco, Centro de Investigaciones en Óptica, A.C. (México)
Bernardino Barrientos, Centro de Investigaciones en Óptica, A.C. (México)
Carlos Mares, Centro de Investigaciones en Óptica, A.C. (Mexico)


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