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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 27 — Dec. 17, 2012
  • pp: 28742–28751

Soot volume fraction fields in unsteady axis-symmetric flames by continuous laser extinction technique.

Muhammad Kashif, Jérôme Bonnety, Philippe Guibert, Céline Morin, and Guillaume Legros  »View Author Affiliations


Optics Express, Vol. 20, Issue 27, pp. 28742-28751 (2012)
http://dx.doi.org/10.1364/OE.20.028742


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Abstract

A Laser Extinction Method has been set up to provide two-dimensional soot volume fraction field time history at a tunable frequency up to 70 Hz inside an axis-symmetric diffusion flame experiencing slow unsteady phenomena preserving the symmetry. The use of a continuous wave laser as the light source enables this repetition rate, which is an incremental advance in the laser extinction technique. The technique is shown to allow a fine description of the soot volume fraction field in a flickering flame exhibiting a 12.6 Hz flickering phenomenon. Within this range of repetition rate, the technique and its subsequent post-processing require neither any method for time-domain reconstruction nor any correction for energy intrusion. Possibly complemented by such a reconstruction method, the technique should support further soot volume fraction database in oscillating flames that exhibit characteristic times relevant to the current efforts in the validation of soot processes modeling.

© 2012 OSA

OCIS Codes
(100.1830) Image processing : Deconvolution
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(290.1090) Scattering : Aerosol and cloud effects
(290.2200) Scattering : Extinction

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: August 31, 2012
Revised Manuscript: October 24, 2012
Manuscript Accepted: November 27, 2012
Published: December 11, 2012

Citation
Muhammad Kashif, Jérôme Bonnety, Philippe Guibert, Céline Morin, and Guillaume Legros, "Soot volume fraction fields in unsteady axis-symmetric flames by continuous laser extinction technique.," Opt. Express 20, 28742-28751 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-27-28742


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