发动机冷却水套内三维流动的数值模拟研究

应用FIRE软件对某一发动机冷却水套进行了三维数值模拟，得到了冷却液流场速率、换热系数分布、压力损失以及流量分布等流场信息。从计算结果中发现，该发动机缸体水套的第2缸、第3缸等区域存在流动死区．水套进、排气侧流量分布相差较大．整体水套压力损失与同类机型相比偏小等不合理的流动现象，是导致其第2缸、第3缸“拉缸”的主要原因。最后提出了相应的解决方案。

Study on Three-Dimension Numerical Simulation of Coolant Flow in Engine Water Jackets

D numerical simulation of water jacket of an engine is done with the FIRE software,and the flow field information,such as coolant flow field rate,distribution of heat exchange coefficiency,pressure loss and flow distribution,etc.are ob tained.It is shown by simulation results that the main causes for scuffing of cylinder bore no.2and3are as follow-ings:dead flow areas in the water jackets of in cylinderbore no.2an d3,great difference between flow dis tribution at the in take manifold side and the exhaust manifold side,overall pressure loss in water jackets smaller than other same type en-gines.In the end,so lu tions for the prob lems are presented out.