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中文摘要：
本文采用简化燃烧室研究柴油机燃烧室结构参数对涡流比的影响。简化燃烧室排除了实际燃烧室边界形状的复杂性,主要结构参数之间的可比性更强。研究表明,缸内总体平均涡流比遵循角动量守恒定律,由流体平均旋转半径、角动量、以及摩擦耗散决定。上止点附近,横截面上的平均涡流比除受上述三种因素影响外,还受燃烧室内涡环的影响,涡环的强弱取决于活塞凹坑形式;横截面切向速度分布因受涡环影响,而不能简单归结为刚体流与势流的组合。
英文摘要：
This paper analyzes the effect of combustion chamber structural parameters on swirl ratio using the simplified combustion chambers,which are designed to eliminate the complexity of practical combustion chamber and retain the main characteristic of the configuration.The results indicate that the shapes of the piston have a significant influence on the vortex in the straight-cut section which tends to deform the mean swirl ratio in the cross section.The tangential velocity field in a cross section is too comp...
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