Coherent anti-stokes Raman spectroscopy (CARS) measurements in coal-seeded flames

Journal Article · Tue Oct 01 04:00:00 EDT 1991 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(91)90028-A· OSTI ID:5724768

Hancock, R D ^[1]; Hedman, P O; Kramer, S K ^[2]

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1. Wright Lab., Aero Propulsion and Power Directorate, Wright-Patterson AFB, OH (US)
2. Dept. of Chemical Engineering, Brigham Young Univ., Provo, UT (US)

This paper reports on coherent anti-Stokes Raman spectroscopy (CARS) which is a laser diagnostic technique that can be used to determine temperature and major species concentrations in harsh combustion environments. CARS has been successfully applied to clean gas flames, but much less attention has been given to particle-laden flames like those encountered in industrial coal burners. Typically, experimental CARS spectra are obtained from a flame and then compared with theoretical CARS spectra to determine temperature and species concentration information. This information is more difficult to acquire in coal flames due to background and nonresonant interferences. These interferences alter the shape and intensity of the CARS signal, thus making analysis with unmodified version of standard CARS fitting codes impractical. Nitrogen temperature measurements were obtained in heavily coal-seeded natural gas/air flames two different coals and several coal feed rates and stoichiometries were investigated in order to determine possible limits associated with making CARS measurements in coal flames.

• OSTI ID: 5724768
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 87:1; ISSN CBFMA; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
ELEMENTS
ENERGY SOURCES
FLAMES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
LASER SPECTROSCOPY
MATERIALS
NATURAL GAS
NITROGEN
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
RAMAN SPECTROSCOPY
SPECTROSCOPY
STOICHIOMETRY
TEMPERATURE MEASUREMENT
THERMOCHEMICAL PROCESSES