考虑材料物性热效应热障涂层活塞热特性研究  

Study on Thermal Characteristics of Thermal Barrier Coating Piston Considering Thermal Effect of Material Physical Properties

作　　者：郭东东 龚京风 郑安文[1] GUO Dong-dong;GONG Jing-feng;ZHENG An-wen(School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Hubei Wuhan 430081,China)

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081

出　　处：《机械设计与制造》2022年第4期25-29,共5页Machinery Design & Manufacture

基　　金：湖北省教育厅科学技术研究项目(Q20181106)。

摘　　要：采用耦合方法研究材料物性热效应对热障涂层活塞热特性的影响。以某柴油机活塞为研究对象,建立耦合模型并验证计算的正确性;基于材料物性参数随温度的变化,分析材料物性热效应对活塞温度场和热应力的影响。结果表明:材料物性热效应对最高温度影响较小,温度波动约2.25%。考虑材料物性热效应的最大热应力为524MPa,比常物性参数的热应力值大。考虑材料物性热效应与常物性参数的最大热应力相差86MPa,因此材料物性热效应对活塞热应力的影响应引起高度重视。The coupling effect method is used to study the effect of material thermal effect on the thermal properties of thermal barrier coating piston.Taking a diesel engine piston as the research object,the thermo-coupling model is established and the correctness of the calculation is verified.Based on the change of material physical property parameters with temperature,the influence of material thermal effect on the temperature field and thermal stress of the piston is analyzed.The results show that the thermal effect of material properties has little effect on the maximum temperature,and the temperature fluctuation is about 2.25%.The maximum thermal stress considering the physical thermal effect of the material is 524MPa,which is larger than the thermal stress value of the normal physical parameter.Considering the difference between the thermal effect of material properties and the maximum thermal stress of the physical parameters is 86MPa,the influence of the thermal effect of material properties on the thermal stress of the piston should be highly valued.

关 键 词：活塞 热障涂层 传热 热效应 温度场 热应力 

分 类 号：TH16[机械工程—机械制造及自动化] TH14[一般工业技术—材料科学与工程]