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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 12 — Apr. 20, 2003
  • pp: 2063–2071

Vortex-induced flame extinction in two-phase counterflow diffusion flames with CH planar laser-induced fluorescence and particle-image velocimetry

Alix Lemaire, Terrence R. Meyer, Katharina Zähringer, Juan C. Rolon, and James R. Gord  »View Author Affiliations


Applied Optics, Vol. 42, Issue 12, pp. 2063-2071 (2003)
http://dx.doi.org/10.1364/AO.42.002063


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Abstract

Here the interaction between a laminar two-phase, non-pre-mixed counterflow flame and a vortex is examined. Special emphasis is given to the influence of different flame and vortex parameters on the extinction behavior of the flame. Simultaneaous planar laser-induced fluorescence of the CH radical layer produced by the flame and particle-image velocimetry measurements of the flowfield are used to characterize the flame-vortex interaction. These simultaneous diagnostics are used for the first time in this configuration. The extinction processes occurring during the flame-vortex interaction can be analyzed by this method, especially the influence of strain at the flame surface. The influence of the droplets on the extinction behavior appears clearly compared with a fully gaseous flame. The spray flame is weaker and extinguishes earlier than does a gaseous flame. In the measurements an additional broadband signal in the vicinity of the CH layer is probably due to the induced fluorescence of polycyclic aromatic hydrocarbons, excited at the same wavelength.

© 2003 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(010.7060) Atmospheric and oceanic optics : Turbulence
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(300.2530) Spectroscopy : Fluorescence, laser-induced

History
Original Manuscript: May 20, 2002
Revised Manuscript: September 10, 2002
Published: April 20, 2003

Citation
Alix Lemaire, Terrence R. Meyer, Katharina Zähringer, Juan C. Rolon, and James R. Gord, "Vortex-induced flame extinction in two-phase counterflow diffusion flames with CH planar laser-induced fluorescence and particle-image velocimetry," Appl. Opt. 42, 2063-2071 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-12-2063

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