为了提高某V型发动机冷却性能,对该机原冷却水套模型结构分5个阶段进行了改进,包括加大左右侧排气端气缸垫通道面积,增加气缸盖和气缸体水套通道,开通气缸盖水套排气侧中间断口。利用Ricardo三维流体软件VECTIS对原水套和每阶段改进水套进行了三维数值模拟计算,并进行了比较分析。结果表明,最终改进后的水套流动性能比原水套有明显的改善。 In order to improve the cooling performance of a V-type engine, the original cooling jacket model structure of the machine is improved in five stages, including increasing the channel area of ​​the cylinder pad on the left and right exhaust ends, increasing the channel of the cylinder head and the water jacket of the cylinder block, opening Cylinder head water jacket exhaust side of the middle of the fracture. Three-dimensional numerical simulation of the original water jacket and the improved water jacket of each stage was carried out by using the Ricardo 3D fluid software VECTIS. The comparative analysis was carried out. The results show that the final improved water jacket flow performance than the original water significantly improved.