Comparison of Soot Model Predictions with Experimental Data for a Turbulent Sooting Propane Jet Flame

摘要

Simplified global reaction steps for soot particle formation, growth, oxidation and agglomeration have been incorporated into two separate models for turbulent nonpremixed combustion. The first of these models is a hybrid steady laminar flamelet (SLF) model which uses flamelet library data to determine the local rates of the aforementioned soot processes at various rates of strain and degrees of radiant heat loss. The second model employs the soot processes in a Conditional Moment Closure (CMC) method and solves for soot mass fraction and particle abundance concurrently with the determination of gas phase reactions and radiant heat loss. The predictions of these two models are compared with experimental data for a turbulent propane jet flame. It is found that the interdependence between the rate of soot processes and radiation losses is an integral feature of the modelling problem. In general, it was not possible to determine a universally appropriate set of soot process rates, due to the need to take differences in radiation heat loss submodels and turbulent combustion models into account.