
2012年第6期(总第132期)【模拟计算】
内燃机与动力装置I.C.E&Powerplant
某16缸柴油机冷却系统一维与三维联合仿真
崔艳伟",宋希庚”,周祺”,孟浩”
(1.大连理工大学内燃机研究所,辽宁大连116024;
2.中国北车集团大连机车车辆有限公司,辽宁大连116022)
2012年12月
摘要:标定工况下,对某16缸机车用荣油机进行联合仿真。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ANSYSCFX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梭角处温度过高,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:荣油机;冷却系统;联合仿真
中图分类号:TK424.2文献标志码:A文章编号:1673-6397(2012)06-0026-05
One-dimensional and Three-dimensional Co-Simulation of Cooling System
ina16-CylinderDiesel Engine
CUI Yan wei', SONG Xigeng', ZHOU Zhen', MENG Hao*
( 1. Institute of Intemal Combustion Engine, Dalian University of Technology ,Dalian 116024,China; 2. China north car group Dalian locomotive and rolling stock co., LTD., Dalian 116022,China)
Abstract:A co simulation is done on one 16cylinder 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 intemal 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-
Key Words :Diesel Engine; Cooling System; Co simulation
引言
柴油机内部结构复杂,热负荷及热应力较大。结构合理且性能优越的冷却系统能够减小柴油机的热应力防止柴油机零部件损坏,降低其磨损和热变形,提高其可靠性和耐久性。目前CFD(ComputationalFluidDynamic)技术已经成为研究柴油机冷却水套的主要方法。运用 CFD技术分析柴油机冷却水套的冷却能力,找出影响发
动机冷却水套性能的主要因素,可用于指导发动机冷却水套的设计和试验工作,能够有效地缩短研发周期,节约研发成本。
冷却系统的数值模拟简介 1
1.1数值模拟现状("
数值模拟中最简单的方法是仅对冷却液流动进行
作者简介:崔艳伟(1986-),男,河北秦皇岛人,硕士,主要研究方向为内燃机冷却系统及NVH。收稿日期:2012-1205
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