【摘要】 利用数值模拟对某汽油机的冷却水套进行了冷却性能研究,对原机冷却水套内冷却水的流场分布、冷却水套内壁面换热系数和压力损失进行了分析。计算结果表明:该汽油机冷却水套总体分布合理,设置的8个分水孔各自取到不同的作用;通过大孔B1、B2的流体用于冷却鼻梁区等重点区域,其它孔主要用来将绕流缸体的冷却水引入缸盖,对缸盖冷却起补充作用;鼻梁区等热负荷大的区域冷却水流速大于0.5 m/s,达到了冷却要求,整个水套没有流动死区,避免了潜在的局部过热事故的发生。更多还原

【Abstract】 In this paper,the cooling performance of the cooling jacket used on IC engine was studied numerically,The flow field of cooling water in the water cooling jacket,the heat convection coefficient of the inner wall,the whole pressure loss for the original engine were analyzed.The results show that the structure of the water cooling jacket is reasonable,with 8 holes playing different roles,in which the large holes,B1and B2,supply water to cool the bridge of the nose area and other areas with heavy heat load in cylinder head and the other holes play complement roles for the cooling.The fluid velocity in the areas with heavy heat load is greater than 0.5m/s filling the cooling requirement and there is no static water overall avoiding potential overheating accidents.更多还原