LES Analysis of Mixture Formation and Combustion Processes in a Diesel Spray

Numerical calculations based on large eddy simulation were performed in order to investigate mixture formation, ignition, and combustion processes in a diesel spray formed by fuel injection into a constant-volume vessel under high-temperature and high-pressure conditions. Fuel concentration distributions in a spray and local non-homogeneous mixture distributions were compared with experimental results to verify the accuracy of the calculations. In addition, calculations were carried out to examine the effect of injection parameters, namely, injection pressure and nozzle orifice diameter. Ignition and combustion processes were also investigated using Schreiber's model for calculating the progress of oxidation reactions.