COMPARATIVE-STUDY OF LEAN, STOICHIOMETRIC AND RICH PREMIXED H-2 O-2/AR FLAMES BY MOLECULAR-BEAM MASS-SPECTROMETRY/

The aim of this work is to establish the structure of H-2/O-2/Ar flame s at different equivalence ratios which will be used as reference flam es to determine the structure of more complex burning systems. For thi s purpose, laminar and premised H-2/O-2/Ar flames have been investigat ed at low pressure by using molecular beam sampling mass spectrometry. The structures of those flames have been established by means of diff erent procedures of calibration. Since the reaction mechanism of the H -2-O-2 system is relatively well known, the experimental mole fraction s of stable species, atoms and radicals have been compared with those calculated by using the PREMIX code in order to check the reliability of each procedure of calibration.