中文摘要：

论述了内燃机缸内压缩形式随着燃烧室几何形状的不同而改变的观点,结合燃烧室主要几何尺寸参数采用数值计算方法对缸内压缩形式进行插值计算,改进已有k-ε湍流模型中体现压缩性的系数,从而修正了缸内k-ε湍流模型.进一步将修正后的模型应用于一内燃机缸内湍流数值计算中,得到的计算结果与标准k-ε模型计算结果以及实验结果进行了比较.结果表明：修正后的湍流k-ε模型模拟精确性有所提高,适用于计算内燃机缸内湍流运动.

英文摘要：

The in-cylinder compression mode of internal combustion engine varying with combustion chamber shape was discussed, and then the in-cylinder compression mode was calculated and determined using an interpolation computation method in order to modify the traditional k-ε turbulence model constants, which incarnated compressibility based on the geometric dimension parameters of the combustion chamber. Finally, a modified k-ε turbulence model was obtained. On the other hand, the model modified was applied to the numerical computation of an engine in-cylinder turbulence flow. The computation results were compared with computation results using traditional k-ε model and experimental data. It has been shown that the computation results using k-ε turbulence model modified are improved： the model is suitable for the in-cylinder turbulence flow computation of engine.