基于CFD数值模拟优化汽油机燃烧系统  

Optimizing Gasoline Engine Combustion System Based on CFD Numerical Simulation

作　　者：吴胡胜 李强 李红洲 颜平涛 王时光 Wu Hu-sheng;Li Qiang;Li Hong-zhou;Yan Pin-tao;Wang Shi-guang(Ninbo Geely Royal Engine Components Co.,Ltd,Ninbo 315336,China)

机构地区：[1]宁波吉利罗佑发动机零部件有限公司,浙江宁波315336

出　　处：《内燃机与配件》2024年第14期16-18,共3页Internal Combustion Engine & Parts

摘　　要：对现有某款2.0L GDI发动机的进气道进行改进,应用AVL-FIRE软件进行CFD仿真分析,结果表明,优化后的进气道平均流量系数较之前提高了4.73%,平均滚流比提高了7.93%。应用Star—CD软件对改进前后的燃烧系统进行缸内流动瞬态CFD分析,结果表明,改进后的燃烧系统能在缸内形成更大更强的涡流,瞬态滚流比和湍动能都要明显好于原燃烧系统。台架试验表明,改进后的燃烧系统在不同转速和额定功率点油耗也是低于原燃烧系统。The intake port of an existing 2.0L GDI engine was improved,and AVL-FIRE software was used for CFD simulation analysis.The results show that the average flow coefficient of the improved intake port increased by 4.73%compared to the previous one,and the average tumble ratio increased by 7.93%.Star-CD software was used for transient CFD analysis of the combustion system before and after the improvement,the results show that the improved combustion system can form larger and stronger vortices in the cylinder,and the transient tumble ratio and turbulent energy are significantly better than the original combustion system.Bench tests show that the fuel consumption of the improved combustion system at different speeds and rated power points is lower than the original combustion system.

关 键 词：GDI发动机 优化 流量系数 滚流比 油耗 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]