ABSTRAKT

A RANS based numerical investigation of the Bunsen jet flame F3 is presented and assessed using the moment methods combined with the two-step reduced mechanism derived from the four-step global mechanism of Peters and Williams. The basic argument adopted in this study is that the activation energies of the reaction rates of the two-step reduced scheme are rather small. To validate the flow solver as well as to capture combustion effect on the mean flow field, the simulations are performed, as a first step, for the cold jet. The reactive jet is then calculated where the investigation is focused on the dynamic, thermal and the species mass fractions mean fields in the considered flame. The results show that a reasonable agreement with measurements and previous numerical predictions is found where a representative structure of the flame is consequently identified.