摘要
本文提出了一个适合在准维模型中使用的直喷式柴油机喷雾碰壁与空气卷吸的数学模型。采用紊流射流理论推出了新的壁面射流计算公式，并在正确描述喷注贯穿的基础上建立了有涡流作用的空气卷吸模型。该研究结果用于准维模型的理论计算与实测结果吻合很好，证明了模型的实用性。
A model that is applicable to quasi-dimensional combustion model for prediction of fuel spray impinging and air entrainment process for DI diesel engines has been formulated and developed.The theory of turbulent jet has been employed to induce new formulas for wall jet,and on the base of correct spray penetration,air entrainment model in swirl field has been built.The good agreement between theoretical and experimental results when this model is put into use in a quasi-dimensional model shows the validity of the model.
关键词
直喷式柴油机
喷雾
碰壁
空气卷吸
柴油机
燃油
Direct injection diesel engine,Fuel spray,Impingement,Air entrainment,Model
