摘要
为了分析某柴油机冷却水套冷却性能,用CFX软件对整体冷却水系统进行绝热的三维流动模拟并对冷却效果最差的8#缸进行了气缸盖-冷却水套-气缸套的流固耦合传热仿真,获得了详细的速度场和温度场分布。模拟结果显示整体冷却水套大部分区域流速在0.5m/s以上,进排气门冷却环的流速最大,高温区域主要集中在气缸盖火力面、排气道侧和气缸套中部。在此基础上,提出了冷却水套的三种改进方案并进行比较,结果表明:方案3为最佳优化方案,其平均传热系数比原方案提高了30%以上。
To analyze the performance of a diesel engine cooling system,an adiabatic three-dimensional flow simulation of the whole cooling system was calculated with the CFX software.Then a fluid-solid coupling heat transfer simulation of the cylinder head,cooling water jacket and cylinder liner was carried out for the eighth cylinder whose cooling performance was the worst,obtaining the detailed distributions of velocity and temperature fields.The results show that the velocities of most areas in the cooling water jacket are above 0.5m/s and the cooling rings near the intake and exhaust valves have the maximum velocity.The high temperature areas mainly concentrate in the fire deck and the exhaust port of the cylinder head,and in the middle of the cylinder liner.On this basis three improvements of the cooling water jacket were put forward and compared with one other.The optimization results demonstrate that the 3rd improving scheme is the best solution whose average heat transfer coefficient is 30% greater than the original one.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2015年第4期133-139,共7页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
冷却水套
CFD分析
流固耦合
传热
温度场
IC engine
cooling water jacket
CFD analysis
fluid-solid coupling
heat transfer
temperature field
作者简介
陈思南（1990-），男，硕士生，主要研究方向为内燃机热管理，E-mail：csn@mail．dlut．edu．cn；
薛冬新（联系人），主要研究方向为内燃机热管理及振动，E-mail：xuedx@dlut．edu．cn。
