Soot Modeling in Partially Premixed C2H4/Air Flames

Abstract

A soot model is presented for the application in practical 3D combustion systems. The gas phase is described using finite-rate chemistry and heavy polyaromatic hydrocarbons are captured by a sectional approach. Soot is modeled by a two-equation model containing soot mass fraction and soot number density. The model has been validated on a set of confined laminar axis-symmetric partially premixed ethylene/air flames at different air/fuel ratios. The effect of soot oxidation, diffusion, and heat radiation is analyzed. Good agreement of the final model is achieved for all considered test cases.