摘要
为研究柴油机燃烧室形状对柴油机压缩冲程的影响,应用计算流体力学(Computational Fluid Dynamics,CFD)数值方法,针对3种不同几何形状的直喷型柴油机燃烧室压缩冲程进行三维流场计算.计算结果表明缩口燃烧室具有较大的挤流强度和较合理的涡流分布,可以产生较高的缸内压力和温度,有利于混合气体的形成,与直口和敞口燃烧室相比性能较好.所采用的数值计算方法和分析结果对柴油机燃烧室的设计工作具有参考意义.
To study the influence of combustion chamber configuration on compression stroke of diesel engines, Computational Fluid Dynamics （CFD） is introduced to simulate 3 D flow field characteristics inside direct-injection engine cylinder equipped with three different piston configurations during compression stroke. The results show that reentrant combustion chamber has larger squish intensity and more reasonable swirl distribution, which can produce higher in-cylinder pressure and temperature and is advantageous to generate mixed gas. It has better performance than toroidal and open combustion chamber. The numerical computational method and results can play a significant part in the design of combustion chamber in diesel engines.
出处
《计算机辅助工程》
2007年第3期79-83,共5页
Computer Aided Engineering
关键词
柴油机
燃烧室
压缩冲程
计算流体力学
diesel engine
combustion chamber
compression stroke
computational fluid dynamics
