直喷式柴油机缸内涡流场中燃油喷雾的发展及其壁面限制作用的研究

A Study on Developing Process of Fuel Spray in Swirl Field and Effects of Wall on it

本文提出了一个描述涡流场中油束喷雾发展过程的准维模型，在计算油束的偏转时，考虑了质量与动量的不均匀性，由计算中还可以得到油束着壁时的落点位置和入射角。模型计算和实验结果吻合较好。此外，在本实验数据的基础上拟合出一个描述油束前锋中心在涡流中偏转轨迹的经验公式。

A new quasi-dimensional model with a fuel spray injecting into the swirling air is developed in this study.The deflection of spray in swirl field is calculated in this model with the uneveness of mass and momentum distribution of the spray being considered. Main parameters influencingmixing of the impinged fuel,shch as the incident angle and the position of spray impingement,are examined in the model.In addition,an empirical formula is derived from the test data for the trajectory of spray tip.