Sooting Characteristics of the Simulated In-Cylinder Pool Combustion of Binary Fuel of iso-Octane and Toluene

Abstract

In this study, we devised an experimental model that reproduces sooting characteristics of the in-cylinder pool combustion as a steady phenomenon using an opposed flow burner. Polycyclic aromatic hydrocarbons and the particle volume fraction were measured for binary fuels of iso-Octane and Toluene at 0.1-MPa pressure. Experimental results were compared with numerical results calculated by using the CRECK soot model. As results, it was shown that the experimental values of PVF were the maximum at a slightly lean equivalence ratio of premixture. As the fuel vapor amount increases, the maximum PVF equivalence ratio, _Φmax, transited to the lean side. The numerical results have reproducibility with respect to these tendencies. The experimental values of _Φmax were almost unchanged depending on the mixing ratio of toluene at the same fuel vapor amount. However, numerical results of _Φmax decreases as toluene mixing ratio increases.