摘要
利用计算流体力学(CFD)方法对冷却器流场和温度场进行分析,获得冷却器废气流场和冷却液流场以及冷却器的温度场.通过对进气弯管处结构进行改进,解决了EGR冷却器进口处紊流和各管废气分布不均匀的情况.对冷却器冷却部分进行结构分析,结果表明,在原方案的尺寸和冷却管数上进行改进无法达到更高的冷却要求,需要增大冷却器的尺寸和冷却管数才能获得更低的废气温度.对冷却器结构调整时的各种分析结论为以后该系列冷却器设计提供参考.
CFD method was used to analyze the flow and temperature fields of cooler obtain the cooler＇s exhaust gas flow field, its temperature field and coolant＇s flow field. By modifying the structure of the inlet pipe, the problem of EGR cooler inlet＇s turbulence and tube＇s gas distribution were solved. Results show that using the primary scheme is hard to meet the requirement of enhanced cooling, and increase in size and number of cooling pipe is necessary. Various cooler＇s structures were proposed for the cooler de- sign of this series.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2013年第6期564-568,共5页
Transactions of Csice
基金
企业科研资助项目(D20B-1207060)
关键词
柴油机
废气再循环
冷却器
流场
温度场
diesel engine
exhaust gas recirculation
cooler
flow field
temperature field
