STUDY OF THE STRUCTURE OF A 10-ATMOSPHERE H-2-O-2-AR FLAME USING MOLECULAR-BEAM INLET MASS-SPECTROMETROMETRIC PROBING

The structure of a stabilized flame of an argon-diluted, stoichiometri c hydrogen-oxygen-argon mixture at pressures of 1 and 10 atm was studi ed experimentally. Concentration profiles of stable species and flame- front temperature were obtained. At p = 10 atm, the width of the chemi cal-reaction zone is 0.7 mm and is weakly dependent on flow rate. Comp arison with the available models of hydrogen combustion and the data o btained at p = 1 atm indicates that extrapolation of the mechanism and rate constants of chemical reactions from a low-pressure region to a higher-pressure region is not justified.