某发动机缸内工作过程的CFD分析  

The CFD Simulation of the Engine Working Process

作　　者：高延新 张超 常耀红 Gao Yanxin;Zhang Chao;Chang Yaohong(Anhui Jianghuai Automobile group Co., Ltd., Anhui Hefei 230022)

机构地区：[1]安徽江淮汽车集团股份有限公司,安徽合肥230022

出　　处：《汽车实用技术》2017年第16期126-128,共3页Automobile Applied Technology

摘　　要：文章利用AVLFire软件对某GDI汽油机缸内建立动网格,对喷雾、缸内压力等进行标定,并进行了燃烧计算。结果表明:缸内的滚流满足设计要求;火花塞附近混合气流速合理,燃烧稳定性较好;燃油在缸套和活塞顶部的局部区域形成油膜,建议通过优化进气道结构和活塞顶部形状来减少壁面油膜生成。In this paper,we make dynamic grid,calibrate the spray,the pressure in cylinder,and combustion analysis,usingAVL Fire soft.The results shows:The tumble in cylinder meets requirements;The velocity of mixer is reasonable and thecombustion stability is good;Oil film is formed in the local area of the the cylinder liner and the top of the piston,we suggestthat optimizing the intake port and piston top to reduce the oil film.

关 键 词：贯穿距 滚流 油膜 

分 类 号：U463.6[机械工程—车辆工程]