摘要
本文对内燃机进气和压缩过程中的缸内流场进行了三维数值模拟计算,得到了合理的结果.这些结果表明,从多维数值模拟,可以获得较大的信息量,能够较好地反映几何形状的影响.计算中发现,在进气过程后期和压缩过程中,燃烧室内的涡流中心存在着进动现象.由于燃烧室的偏置,挤流和涡流的相互作用将使燃烧室内的涡流呈现非对称结构;反喷或逆挤流主要集中在燃烧室边缘上.
In-cylinder flow field during the intake and compression processes was simulated by three dimensional flow model. It was found that there is a slow precession movement of swirl center in combustion chamber throughout the later stage of induction and the whole compression process. Because of offset of bowl, the flow field in combustion chamber is not symmetrical under interaction between swirl and squish. Reversed squish is mainly concentrated at edge of combustion chamber bowl.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
1993年第3期191-196,共6页
Transactions of Csice
关键词
内燃机
数值模拟
气体流动
IC Engine
3D in-cylinder flow
Multi-dimensional numerical modeling
