| The objective of this study is to investigate the effects of different inception, growth, coagulation and oxidation source terms in a semi-empirical soot model. Numerical solutions for the fluid flow, turbulence parameters, and species concentrations are obtained on the basis of the flamelet concept and a modified k-epsilon turbulence model. Model predictions are compared with measurements. The simulation results show that the calculated temperature and mixture fraction distributions are in good agreement with available experiments. Predictions of the soot volume fraction are very sensitive to the modeling of the soot surface growth rate. The soot predictions agree well with measurements when the surface growth rate is assumed to be proportional to the square root of the surface area. Naphthalene rate inception route exhibits better performance. Hydroxyl is the principle oxidative agent for soot. The optimal soot model can predict the soot formation in different turbulent ethylene jet flames. |
