摘要
针对某款越野车发动机舱冷却系统性能不足的问题,采用了一种以三维仿真为主、一维仿真为辅的分析方法,进行了发动机舱热管理分析与改进设计。通过三维仿真,对发动机舱进行了流场与温度场分析,找出了发动机舱内的高温热害部位;通过一维仿真,得到了发动机的出水温度和中冷器热端的出风温度,计算出了相应的ATD值和中冷常数。在此基础上,采用了加装导流板的改进方案,降低了中冷常数。仿真结果显示:发动机舱内中冷器上方区域存在明显的热回流情况,导致中冷常数偏高。加装导流板后,中冷器的进风量有所增加,回流量有所减少,中冷常数从28℃降低到21.31℃。这为该款越野车型的研发提供了技术支持,缩短了研发周期。
In response to the unsatisfactory performance of the cooling system in the engine compartment of an off-road vehicle,an analysis based on 3D simulation and supplemented by 1D simulation is made to improve the thermal management of the engine compartment.By means of 3D simulation,the flow field and temperature field of the engine compartment are analyzed,and the high temperature heat damage parts in the engine compartment are pointed out.By means of 1D simulation,the outlet water temperature of the engine and the outlet air temperature of the hot end of the intercooler are obtained,and the corresponding ATD value and intercooler constant are calculated.On suchbasis,an improved scheme of adding a deflector is adopted to improve the intercooling constant.The simulation results show that there is obvious heat recirculation in the area above the intercooler in the engine compartment,which causes the intercooler constant to fail to meet the requirements.After installing the deflector,the air intake of the intercooler has increased.Its return flow has been reduced,and in the meantime,the intercooling constant drops to to 21.31℃from 28℃.These research results provide technical support for the research and development of this off-road vehicle and help reduce its R&D cycle.
作者
王良模
张啸天
王陶
袁刘凯
张汤赟
邹亮
WANG Liangmo;ZHANG Xiaotian;WANG Tao;YUAN Liukai;ZHANG Tangyun;ZOU Liang(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Nanjing Iveco Co.,Ltd.,Nanjing 210037,China)
出处
《重庆理工大学学报（自然科学）》
北大核心
2023年第10期9-16,共8页
Journal of Chongqing University of Technology：Natural Science
关键词
发动机舱热管理
三维仿真
一维仿真
流场与温度场
engine compartment thermal management
3D simulation
1D simulation
flow field and temperature field
