定容式直喷汽油机喷雾特性的研究  

On Spraying Features of Metered Volume Gasoline Direct Engine

作　　者：李腾忠[1] 

机构地区：[1]昆明冶金高等专科学校机械工程学院,云南昆明650033

出　　处：《昆明冶金高等专科学校学报》2017年第3期43-48,共6页Journal of Kunming Metallurgy College

摘　　要：对汽油机喷雾特性进行分析,介绍了常用的发动机三维数值CFD模拟软件;选定了燃油喷雾一次雾化分析、二次雾化、雾化蒸发和油滴碰撞4种分析模型;设置了网格体积、数量、时间步长和总步长等喷雾基础模拟数据。结果表明:在发动机气缸充量系数高的情况下,燃油油滴体积的破碎速度更快;能够形成可燃混合气的稀薄燃烧和油滴粒子体积质量更为良好的分层当量比可燃混合气。This paper analyzes the spraying features of gasoline engine, introduces the commonly used simulation software CFD, selects 4 models of primary atomization, secondary atomization, atomization ＆ evaporation, droplet collision and finally establishes the simulation data consisting of mesh volume, quan-tity, time step and total step. The results show that the higher coefficient the cylinder charge is, the faster the fuel drop volume is broken ; and that the lean combustion and combustible mixture with better oil par-ticle could be formed by this way.

关 键 词：CFD模拟分析 缸内直喷 喷雾特性 

分 类 号：TK417.4[动力工程及工程热物理—动力机械及工程]