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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 this paper, the three-dimensional numerical simulation of the in-cylinder flow field during the intake and the compression of the internal combustion engine is carried out, and the reasonable results are obtained.These results show that the multi-dimensional numerical simulation can obtain a large amount of information and can better reflect the geometry Shape, the calculation shows that there is precession in the center of eddy current in the combustion chamber during the latter stage of the intake process and the compression process.Because of the bias of the combustion chamber, the interaction between squeeze flow and eddy current will make the eddy current in the combustion chamber appear Asymmetric structure; anti-injection or anti-squish flow is mainly concentrated on the edge of the combustion chamber.