ABSTRACT
A mayor problem in predicting pollutant formation in flames is the interaction between the turbulence and the combustion chemistry. To obtain a model which allows the prediction of pollutant species, a two-scalar joint probability density function, pdf, was adapted within the k-ε turbulence model. As an intermediate step during the development of such a model, the prediction of nitrogen oxide in the one-dimensional premixed propane/air flame of Robinson (1974) was performed. The pdf approach, proposed by Bray and Moss (1977b), in its expanded version suggested by Jones and Kollmann (1985), was used to evaluate NO as an extra chemical parameter, besides fuel, CO and CO2 concentrations which were originally considered. This model under predicted NO levels, but showed that this approach can be used, with the correct kinetic information, to predict pollutant species.
