Temperature field measurements of small, nonpremixed flames with use of an Abel inversion of holographic interferograms.

نویسندگان

  • Jonathan D Posner
  • Derek Dunn-Rankin
چکیده

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.

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عنوان ژورنال:
  • Applied optics

دوره 42 6  شماره 

صفحات  -

تاریخ انتشار 2003