For Prediction of experimental results in diesel engines, have been suggested the different theoretical models for combustion, fuel injection, spray breakup and spray’s wall impingement, that the accuracy accurate results comparing to the actual condition, is one of the issues interest to researchers in the simulation of combustion process. In this paper, by theoretical, different regimes of spray’s wall impingement have been studied and then, based on experimental observations and calculations, different models of spray’s wall impingement are examined. Finally, the best model to simulate the spray’s wall impingement at the operating conditions is proposed. The results show that the O’Rourke model are the better ability to predict the decomposition of the fuel spray’s droplets and considered all aspects wall impingement and predicts the droplet size produced by penetration and decomposition, correctly. Therefore, it can be used for simulation of spray’s wall impingement at engine’s operating conditions.

Full text: IJEIR_1082_Final.pdf