ICES2006-1376 OPTICAL ANALYSIS AND SIMULATION OF DIESEL SPRAYS IN A HIGH PRESSURE AND HIGH TEMPERATURE SPRAY BOX

ABSTRACT The characterization of diesel sprays for the simulationbased optimization of injection strategies and combustion chamber geometries is of particular importance to reach future targets concerning performance, fuel consumption and emissions. The prediction quality of this simulation process depends largely upon the adequate calibration of the spray models used. This paper aims to present the experimental setup of a spray box, the applied optical visualization techniques and the results. Furthermore, it will show the adjustment and the validation of the simulation models based on the experimental analysis. INTRODUCTION Very high demands are made on modern diesel engines concerning performance, fuel consumption, and emissions. In particular, the development targets for efficiency and compliance with emission limits can only be reached through costly calibrated internal combustion designs. The common rail injection technology in use today in direct injection diesel engines provides many different possibilities for varying the injection parameters in order to improve the formation of the combustion process. Within the development process, therefore, the characterization of diesel sprays is of great importance for the simulation-based optimization of injection strategies and combustion chamber geometry. The prediction quality of thi