SOOT FORMATION MODELING FOR TURBULENT FLAMES

A simple two-equation model is proposed for soot formation and oxidati on. It is based on measurements of the maximum soot volume fraction, e xperimentally observed in all premixed hydrocarbon-air laminar flames, and depends on the fuel composition. The model is validated on lamina r diffusion flames, and then introduced in an Eulerian-Lagrangian appr oach to predict turbulent flames. The proposed set of constants has be en adapted to ethylene-air atmospheric flames, although the newly deve loped approach may be applied to any hydrocarbon-air diffusion flame. The major parameters have been tested and the present study emphasizes the effects of turbulent fluctuations on the soot yield. The comparis on of the computed results and experimental published data shows good agreement with the predictive trends provided. Copyright (C) 1997 by T he Combustion Institute