A numerical simulation of the performance and emission characteristics of DI diesel engine by the wall impingement of high pressure spray

摘要

High pressure injection is recently used to reduce the emissions and increase the power of diesel engine. This high pressure injection makes the spray strike the cylinder wall. This spray/wall impingement is known to affect the emission andperformance of DI diesel engine such that it is very important to know the spray/wall impingement process. in this study, multidimensional computer program KIVA-II was used to clarify the effect of spray wall impingement by different injection spray angle with the spray/wall impingement model considering rebound and slide motion and also improved submodel for liquid breakup and drop distortion.