TY  - JOUR
AB  - The method of species concentration measurements by laser-induced fluorescence (LIF) in flames was further developed. The applicability of the two-level rate-equation model was examined for the experimental conditions. Inhomogeneous saturation due to the spatial intensity distribution of the laser light was corrected for using a field of local laser intensities obtained experimentally. Among other things, the accuracy of the calibration of the optical detection system was crosschecked by two methods. Absolute number densities of CH and OH could be determined in a 13 mbar C2H2--O2 flame from measurements of the average saturation degree as a function of laser intensity. From these saturation curves approximate oscillator strengths could be obtained which provided a check of the evaluated number densities. Temperatures were determined from rotational spectra of the excited molecules. For the extension of the method to higher pressure, preliminary results obtained with a multilevel relaxation model are presented.
DA  - 1985
DO  - 10.1016/S0082-0784(85)80606-8
LA  - eng
IS  - 1
M2  - 1177
PY  - 1985
SN  - 0082-0784
SP  - 1177-1185
T2  - PROCEEDINGS OF THE COMBUSTION INSTITUTE
TI  - Determination of absolute OH and CH concentrations in a low pressure flame by laser-induced saturated fluorescence
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-17810062
Y2  - 2024-11-21T22:07:43
ER  -