Coherent anti-stokes Raman spectroscopy (CARS) measurements in coal-seeded flames
- Wright Lab., Aero Propulsion and Power Directorate, Wright-Patterson AFB, OH (US)
- 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), Vol. 87:1; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
Similar Records
Acetylene measurements in flames by coherent anti-Stokes Raman scattering
CARS thermometry in laminar sooting ethylene-air co-flow diffusion flames with nitrogen dilution
Related Subjects
COAL
COMBUSTION
FLAMES
RAMAN SPECTROSCOPY
CARBON MONOXIDE
NATURAL GAS
NITROGEN
PARTICLES
STOICHIOMETRY
TEMPERATURE MEASUREMENT
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
LASER SPECTROSCOPY
MATERIALS
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SPECTROSCOPY
THERMOCHEMICAL PROCESSES
014000* - Coal
Lignite
& Peat- Combustion