title: Diode laser sensor for measurements of CO, CO(2), and CH(4) in combustion flows.
abstract: A diode laser sensor has been applied to monitor CO, CO(2), and CH(4) in combustion gases with absorption spectroscopy and fast extraction-sampling techniques. Survey spectra of the CO 3nu band (R branch) and the 2nu(1) + 2nu(2)(0) + nu(3) CO(2) band (R branch) near 6350 cm(-1) and H(2)O lines from the nu(1) + 2nu(2) and 2nu(2) + nu(3) bands in the spectral region from 6345 to 6660 cm(-1) were recorded and compared with calculated spectra (from the HITRAN 96 database) to select optimum transitions for species detection. Species concentrations above a laminar, premixed, methane-air flame were determined from measured absorption in a fast-flow multipass absorption cell containing probe-sampled combustion gases; good agreement was found with calculated chemical equilibrium values.
authors.forename: R M
authors.initials: RM
authors.lastname: Mihalcea
authors.forename: D S
authors.initials: DS
authors.lastname: Baer
authors.forename: R K
authors.initials: RK
authors.lastname: Hanson