Abstract
The aim of this work has been to establish the conditions for validating a mechanism by comparison with experimental data. For this purpose, it has been chosen to perform investigations in the relatively well-known hydrogen-oxygen system. The structure of a rich H 2 /O 2 /Ar flat flame has been investigated at low pressure (35.5 torr) by using the molecular beam sampling technique coupled with the mass spectrometric analysis (MBMS). The experimental mole fraction profiles of stable species, atoms and radical have been compared with those calculated by using the PREMIX code and this for several mechanisms. The computations have been performed by introducing the experimental temperature profile (measured at about 0.2–0.3 mm from the tip of the sampling cone) as an input parameter. It is assumed by this procedure to take into account the perturbation effect of the sampling probe on the individual mole fraction profiles. Using this approach the comparison, between experimental and computed data has been successful especially with the Miller's model.
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