摘要
结合4102低排放天然气发动机的开发,应用FIRE软件对4102发动机原燃烧室和2种新的燃烧室设计方案(楔形和弧形燃烧室)进行了建模和仿真计算,对比分析了燃烧室形状对缸内流动和燃烧过程的影响。结果表明,弧形燃烧室效果最好,与原燃烧室相比,在点火时火花塞附近气流速度低,初期火焰核心稳定,火焰传播速度快,燃烧持续期短,缸内最高压力比原始燃烧室提高12.7%,有利于提高天然气发动机性能。
During the development of the low-emission 4102 CNG natural gas engine, its original combustion chamber and two additionally designed shapes of the combustion chamber, the wedgeshaped and the arc-shaped chambers were modelled and simulated with AVL FIRE code. The effects of the combustion chamber shape on the in-cylinder flow and the combustion process were studied comparatively. The simulation results show that in the engine with the arc-shaped combustion chamber, compared with that with the original combustion chamber, the velocities of the mixture around the spark plug are lower, the initial flame core is steadier, the flame propagation is faster, the combustion duration is shorter, and the maximum combustion pressure is 12. 7% higher, all those demonstrate that the arc-shaped combustion chamber is beneficial to improving the natural gas engine performance.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2007年第6期1257-1262,共6页
Journal of Jilin University:Engineering and Technology Edition
基金
'863'国家高技术研究发展计划项目(2006AA11A1B1)
关键词
动力机械工程
燃烧室形状
缸内流动
燃烧过程
power machinery and engineering
chamber shape
in-cylinder flow
combustion process
