title: Validation of a rotational coherent anti-Stokes Raman spectroscopy model for carbon dioxide using high-resolution detection in the temperature range 294-1143 K.
abstract: Experiments were performed in the temperature range of 294-1143 K in pure CO(2) using high-resolution rotational coherent anti-Stokes Raman spectroscopy (CARS), in the dual-broadband approach. Experimental single-shot spectra were recorded with high spectral resolution using a single-mode Nd:YAG laser and a relay imaging lens system on the exit of a 1 m spectrometer. A theoretical rotational CARS model for CO(2) was developed for evaluation of the experimental spectra. The evaluated mean temperatures of the recorded single-shot dual-broadband rotational coherent anti-Stokes Raman spectroscopy (DB-RCARS) spectra using this model showed good agreement with thermocouple temperatures, and the relative standard deviation of evaluated single-shot temperatures was generally 2-3%. Simultaneous thermometry and relative CO(2)/N(2)-concentration measurements were demonstrated in the product gas of premixed laminar CO/air flames at atmospheric pressure. Although the model proved to be accurate for thermometry up to 1143 K, limitations were observed at flame temperatures where temperatures were overestimated and relative CO(2)/N(2) concentrations were underestimated. Potential sources for these discrepancies are discussed.
authors.affiliation: Division of Combustion Physics, Lund Institute of Technology, P.O. Box 118, 221 00 Lund, Sweden.
authors.forename: Fredrik
authors.initials: F
authors.lastname: Vestin
authors.forename: Kristin
authors.initials: K
authors.lastname: Nilsson
authors.forename: Per-Erik
authors.initials: PE
authors.lastname: Bengtsson
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D015203:Reproducibility of Results; D012399:Rotation; D012680:Sensitivity and Specificity; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013696:Temperature
chemical_list: D002245:Carbon Dioxide