3D Simulation of DI Diesel Combustion and Pollutant Formation Using a Two-Component Reference Fuel

摘要

By separating the fluid dynamic calculation from that of the chemistry, the unsteady flamelet model allows the use of comprehensive chemical mechanisms, which include several hundred reactions. This is necessary to describe the different processes that occur in a DI Diesel engine such as autoignition, the burnout in the partially premixed phase, the transition to diffusive burning, and formation of pollutants like NO_x and soot. The highly nonlinear reaction rates need not to be simplified, and the complete structure of the combustion process is preserved.