汽油缸内多孔直喷喷雾破碎模型建立与试验  

Spray Break-up Model Establishment and Experiment of Multi-hole Injector on Gasoline Direct Injection Engine

作　　者：王艳华[1,2] 杨世春[2] 高峰[2] 苏铁熊[1] 董小瑞[1] 

机构地区：[1]中北大学机电工程学院,太原030051 [2]北京航空航天大学交通科学与工程学院,北京100191

出　　处：《农业机械学报》2013年第3期12-16,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50606014)

摘　　要：为了建立汽油缸内多孔直喷喷雾破碎模型,对Huh Gosman模型进行分析评估,并且以喷油压力为参数,建立初始破碎粒径分布公式,从而建立了汽油缸内多孔直喷喷雾破碎模型;并通过定容喷雾试验进行了汽油自由喷雾试验,验证所建模型的合理性。研究结果发现:以经验公式估计的初始液滴直径评估Huh Gosman模型,模拟结果贯穿度偏小;通过建立初始破碎粒径分布函数,同时对Huh Gosman模型进行修正,模拟计算结果与实际结果相近。最后利用该模型对不同喷油压力下的自由喷雾进行模拟,计算与试验结果吻合较好,最大误差小于5%。In order to establish spray break-up model of multi-hole injection on gasoline direct injection engine, Huh Gosman model was analyzed and evaluated. The primary break-up particle size distribution formula was built based on injection pressure. The spray break-up model was built for gasoline direct injection in cylinder. Finally, by establishing the capacity spray experiments, gasoline free spray experiments were carried out to verify the rationality of the model. It is found that estimating initial droplet size by experience formula to evaluate second break-up model, the spray penetration calculated with Huh Gosman model is smaller than experimental results. Through establishing primary break-up particle size distribution formula and modifying Huh Gosman model, the simulation results and the practical results are close to each other. At last, free spray under different injection pressure were simulated with above established models. Results matches well with the experimental results and the maximum average error is less than 5%.

关 键 词：缸内直喷汽油机 多孔喷油器 破碎模型 粒径分布函数 

分 类 号：TK416[动力工程及工程热物理—动力机械及工程]