Abstract
Interferometry has been used for many years as a semi-quantitative image-based diagnostic for combustion research. In this paper, we use image-plane, double-pulse holographic interferograms of axisymmetric flames to infer their radial temperature distribution. An Abel inversion is performed on the fringe data to account for line-of-sight integration through the flame. The sensitivity of nonresonant refractive diagnostics decreases inversely with temperature, and the accuracy of the technique is discussed in this context. A small, nonpremixed capillary flame is investigated, and the temperatures inferred from interferometry are compared with those obtained with N2 coherent anti-Stokes Raman spectroscopy thermometry. Additionally, the thermal field of a burning monodisperse methanol droplet stream is investigated interferometrically. Because of their small size, both of these flames challenge the performance limit of temperature interferometery.
© 2003 Optical Society of America
Full Article | PDF ArticleMore Like This
G. Paul Montgomery and D. L. Reuss
Appl. Opt. 21(8) 1373-1380 (1982)
Markus Gawlowski, Kerry E. Kelly, Laurie A. Marcotte, and Axel Schönbucher
Appl. Opt. 48(23) 4625-4636 (2009)
David L. Reuss and Patricia H. Schultz
Appl. Opt. 26(9) 1661-1667 (1987)