柴油机缸盖流固耦合传热分析与实验验证  

Fluid-Solid Coupling Heat Transfer and Experimental Verification of Cylinder Head of Diesel Engine

作　　者：魏丹[1] 庞华庭 段敏[1] 王俊文[1] WEI Dan;PANG Hua-ting;DUAN Min;WANG Jun-wen(College of Automobile and Transportation Engineering,Liaoning University of Technology,Liaoning Jinzhou 121001,China;Dongfeng Chaoyang Diesel Co.,Ltd.,Liaoning Chaoyang 122000,China)

机构地区：[1]辽宁工业大学汽车与交通工程学院,辽宁锦州121001 [2]东风朝阳朝柴动力有限公司,辽宁朝阳122000

出　　处：《机械设计与制造》2019年第12期67-70,共4页Machinery Design & Manufacture

基　　金：2014年辽宁省科学技术计划项目(2014106008);2016年辽宁省自然科学基金项目(201602369)

摘　　要：为了研究某柴油机工作时气缸燃烧和冷却系统共同作用下缸盖的温度分布,采用流固耦合的方法对其进行温度场分析。运用三维数值仿真计算技术对柴油机缸内的燃烧、冷却过程进行计算,以此得到柴油机缸内燃烧室温度场的分布状态、热换系数等参数,以及冷却系统中缸盖水套的温度分布状态、热换系数;再进行研究,得出冷却水套壁面、缸盖火力面的热边界条件。将上述过程得到的热边界条件应用于气缸盖有限元模型中进行传热耦合计算,最终得到柴油机气缸盖的温度场分布;为了验证此计算结果的有效性,对温度场分布结果进行实验验证,最终确定结果。实验最终表明,柴油机缸盖最高温度远远低于其材料的最高工作温度,分布较为合理。In order to research the temperature distribution of a cylinder head of a diesel engine under the coaction of burning and cooling,the temperature field of which is analyzed with fluid-solid coupling technique.3d numerical simulation of combustion process in cylinder and cooling system of diesel engine are carried out.The heat transfer coefficient and the temperature field distribution of combustion are analyzed,the heat transfer coefficient of the cooling system and the temperature field distribution of cylinder head are also analyzed,and the boundary conditions for the wall surface of cylinder head and water jacket are obtained.Then the thermal boundary conditions are mapped to finite element model,the coupling calculation for heat transfer of diesel engine cylinder head is achieved,and the temperature field of cylinder head is obtained.Combining with the cylinder head temperature test experiment,the results are analyzed,verify the validity of the simulation calculation.The results show that the temperature distribution of cylinder head of diesel engine is reasonable and the maximum temperature is well below the material allowable temperature.

关 键 词：柴油机 气缸盖 冷却水套 流固耦合 温度场 传热分析 

分 类 号：TH16[机械工程—机械制造及自动化] TK421[动力工程及工程热物理—动力机械及工程]