崔艳伟，宋希庚，周禛，孟浩  

    摘要：标定工况下,对某16缸机车用柴油机进行联合仿真。利用GT-cool软件对柴油机整体进行一维仿真,得到冷却系统各个管路和机体的流量、温度和压力等数据,然后将一维仿真的结果作为边界条件,采用ANSYS CFX软件对冷却效果最差的第8缸进行冷却水三维仿真,得到此缸冷却水的内部流场、温度场和压力场,最后得出结论:排气管冷却水道两侧棱角处温度过高,存在流动死区,需进行冷却优化。实例表明,联合仿真可用于工程计算,能满足精度要求。

    关键词： 柴油机;冷却系统;联合仿真

    Abstract: A co-simulation is done on one 16-cylinder locomotive diesel engine under rated working conditions.This paper gets data on flow rate,temperature and pressure of cooling system and cylinder block using GT-cool software and then uses CFX software gives a 3D-simulation on the cooling water of the eighth cylinder which is worsen cooled to get internal flow field,temperature field and pressure field.The results shows that temperature is very high in two edges of cooling passages in the exhaust manifold and there is a dead cooling area,so its cooling needs to be optimized.The actual examples have indicated that co-simulation method might be applied in practical engineering.

    Keywords: Diesel Engine;Cooling System;Co-simulation

参考文献：

[1]于秀敏,陈海波,黄海珍,等.发动机冷却系统中流动与传热问题数值模拟进展[J].机械工程学报,2008,44(10):162-167.

[2]李婷,俞小莉,李迎,等.基于有限元法的活塞-缸套-冷却水系统固流耦合传热研究[J].内燃机工程2006,27(5):41-45.

[3]刘巽俊,陈群,李骏,等.车用柴油机冷却系统的CFD分析[J].内燃机学报,2003,21(2):125-129.

[4]陶文铨.数值传热学[M].2版.西安:西安交通大学出版社,2004.

[5]白敏丽,吕继祖,丁铁新.6缸柴油机冷却系统流动与传热的数值模拟研究[J].内燃机学报,2004,22(6):525-531.

[6]郑清平,张惠明,黎苏,等.基于三维CFD技术的发动机冷却水套流动分析.内燃机工程2009,30(6):37-40.