Evolution of the Soot-Particle Size Distribution Function in the Cylinder and Exhaust System of Piston Engines: Simulation

A computational tool for simulating the temporal evolution of soot-particle size distribution function (SDF) in internal combustion engine (ICE) and attached exhaust pipe is developed tested against available experimental data on SDF at outlet system. Firstly, a database soot particle properties (particle mean diameter, dispersion, total number density vs. time different fuels, fuel-to-air equivalence ratios, temperatures, pressures, gas recirculation) based thoroughly validated detailed model formation under ICE conditions. The organized form look-up tables. Secondly, approximated using log-normal SDF, which directly used multidimensional calculations operation process. Thirdly, coagulation particles developed, includes three mechanisms: Brownian, turbulent–kinetic, turbulent–diffusion. This applied after opening valve. Calculations show that process has significant effect system (the diameter can increase by almost an order magnitude), dominant mechanism diesel Brownian mechanism. objective, approach, obtained results are novel features study.