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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 8 — Apr. 15, 2014
  • pp: 2350–2353

Imaging Fourier-transform spectrometer measurements of a turbulent nonpremixed jet flame

Jacob L. Harley, Brent A. Rankin, David L. Blunck, Jay P. Gore, and Kevin C. Gross  »View Author Affiliations

Optics Letters, Vol. 39, Issue 8, pp. 2350-2353 (2014)

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This work presents recent measurements of a CH4/H2/N2 turbulent nonpremixed jet flame using an imaging Fourier-transform spectrometer (IFTS). Spatially resolved (128×192 pixels, 0.72mm/pixel) mean radiance spectra were collected between 1800cm1ν˜4500cm1 (2.22μmλ5.55μm) at moderate spectral resolution (δν˜=16cm1, δλ¯=20nm) spanning the visible flame. Higher spectral-resolution measurements (δν˜=0.25cm1, δλ¯=0.3nm) were also captured on a smaller window (8×192) at 20, 40, and 60 diameters above the jet exit and reveal the rotational fine structure associated with various vibrational transitions in CH4, CO2, CO, and H2O. These new imaging measurements compare favorably with existing spectra acquired at select flame locations, demonstrating the capability of IFTS for turbulent combustion studies.

© 2014 Optical Society of America

OCIS Codes
(110.3080) Imaging systems : Infrared imaging
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.2140) Spectroscopy : Emission
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:

Original Manuscript: February 17, 2014
Revised Manuscript: March 14, 2014
Manuscript Accepted: March 14, 2014
Published: April 9, 2014

Jacob L. Harley, Brent A. Rankin, David L. Blunck, Jay P. Gore, and Kevin C. Gross, "Imaging Fourier-transform spectrometer measurements of a turbulent nonpremixed jet flame," Opt. Lett. 39, 2350-2353 (2014)

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