Simultaneous Raman scattering and laser-induced fluorescence for multispecies imaging in turbulent flames
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550 (US)
A multispecies imaging technique for single-shot, simultaneous measurement of the OH, CH, and CH{sub 4} concentrations in turbulent nonpremixed flames is described. A unique aspect of the system is the use of a two-wavelength multipass cell to form both a visible and a UV laser sheet. The UV beam is used to excite fluorescence in the OH molecule, while Raman scattering from CH{sub 4} molecules and fluorescence induced in CH is achieved by using the visible beam. The visible and UV lasers are operated simultaneously, and the resulting signals are recorded by two vidicon cameras. The sheet intensity provided by the multipass cell is sufficient to saturate the OH transition, which makes single-shot, laser-saturated fluorescence imaging measurements possible.
- OSTI ID:
- 5689383
- Journal Information:
- Optics Letters; (USA), Journal Name: Optics Letters; (USA) Vol. 16:11; ISSN 0146-9592; ISSN OPLED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
ELECTROMAGNETIC RADIATION
FLAMES
FLUID FLOW
FLUORESCENCE
HYDROCARBONS
HYDROXYL RADICALS
IMAGES
LUMINESCENCE
METHANE
METHYLENE RADICALS
ORGANIC COMPOUNDS
RADIATIONS
RADICALS
RAMAN EFFECT
TURBULENT FLOW
ULTRAVIOLET RADIATION
VISIBLE RADIATION
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
ALKANES
ELECTROMAGNETIC RADIATION
FLAMES
FLUID FLOW
FLUORESCENCE
HYDROCARBONS
HYDROXYL RADICALS
IMAGES
LUMINESCENCE
METHANE
METHYLENE RADICALS
ORGANIC COMPOUNDS
RADIATIONS
RADICALS
RAMAN EFFECT
TURBULENT FLOW
ULTRAVIOLET RADIATION
VISIBLE RADIATION