Instrumentation, Techniques, and Measurement

Performance comparison of background-oriented schlieren and fringe deflection in temperature measurement, part 2: experimental evaluation

[+] Author Affiliations
Alan Blanco, Bernardino Barrientos, Carlos Mares

Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Col. Lomas del Campestre, León, Guanajuato 37150, México

Opt. Eng. 55(6), 064104 (Jun 08, 2016). doi:10.1117/1.OE.55.6.064104
History: Received April 7, 2016; Accepted May 24, 2016
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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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Alan Blanco ; Bernardino Barrientos and Carlos Mares
"Performance comparison of background-oriented schlieren and fringe deflection in temperature measurement, part 2: experimental evaluation", Opt. Eng. 55(6), 064104 (Jun 08, 2016). ; http://dx.doi.org/10.1117/1.OE.55.6.064104


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