本文在直喷式柴油机喷雾形状和构造、初期贯特性的试验研究基础上,提出了一个以实测燃油喷射率为计算原始数据,考虑燃油超越、受阻、雾化和动量交换等因素的瞬态喷雾初期贯穿模型.计算结果表明,模型在较广泛的试验条件下能与试验结果良好吻合.为研究和预测中小型高速柴油机喷雾初期贯穿提供了有效手段. Based on the experimental study of spray shape and structure of the direct injection diesel engine and the initial characteristic of the turbulent flow, a new method based on the measured fuel injection rate for the calculation of the raw data, transient spray considering factors such as fuel overrun, obstruction, atomization and momentum exchange The results show that the model is in good agreement with the experimental results under a wide range of experimental conditions and provides an effective means for the study and prediction of the initial and early stages of small and medium high speed diesel engines.