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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 33 — Nov. 20, 2013
  • pp: 8040–8047

Digital camera measurements of soot temperature and soot volume fraction in axisymmetric flames

Haiqing Guo, Jose A. Castillo, and Peter B. Sunderland  »View Author Affiliations


Applied Optics, Vol. 52, Issue 33, pp. 8040-8047 (2013)
http://dx.doi.org/10.1364/AO.52.008040


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Abstract

New diagnostics are presented that use a digital camera to measure full-field soot temperatures and soot volume fractions in axisymmetric flames. The camera is a Nikon D700 with 12 megapixels and 14 bit depth in each color plane, which was modified by removing the infrared and anti-aliasing filters. The diagnostics were calibrated with a blackbody furnace. The flame considered here was an 88 mm long ethylene/air co-flowing laminar jet diffusion flame on a round 11.1 mm burner. The resolution in the flame plane is estimated at between 0.1 and 0.7 mm. Soot temperatures were measured from soot radiative emissions, using ratio pyrometry at 450, 650, and 900 nm following deconvolution. These had a range of 1600–1850 K, a temporal resolution of 125 ms, and an estimated uncertainty of ±50K. Soot volume fractions were measured two ways: from soot radiative emissions and from soot laser extinction at 632.8 nm, both following deconvolution. Soot volume fractions determined from emissions had a range of 0.1–10 ppm, temporal resolutions of 125 ms, and an estimated uncertainty of ±30%. Soot volume fractions determined from laser extinction had a range of 0.2–10 ppm, similar temporal resolutions, and an estimated uncertainty of ±10%. The present measurements agree with past measurements in this flame using traversing optics and probes; however, they avoid the long test times and other complications of such traditional methods.

© 2013 Optical Society of America

OCIS Codes
(040.1490) Detectors : Cameras
(100.1830) Image processing : Deconvolution
(290.2200) Scattering : Extinction
(290.6815) Scattering : Thermal emission

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: July 19, 2013
Revised Manuscript: October 18, 2013
Manuscript Accepted: October 18, 2013
Published: November 15, 2013

Citation
Haiqing Guo, Jose A. Castillo, and Peter B. Sunderland, "Digital camera measurements of soot temperature and soot volume fraction in axisymmetric flames," Appl. Opt. 52, 8040-8047 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-33-8040


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