基于虚拟仿真的传热学实践教学探索  

Exploration of Heat Transfer Practical Teaching Based on Numerical Simulation

作　　者：刘雨薇[1] 陈浩 安科科 杨拓 张卫正[2] LIU Yuwei;CHEN Hao;AN Keke;YANG Tuo;ZHANG Weizheng(School of Mechanical Electronic&Information Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《实验室研究与探索》2023年第3期186-190,225,共6页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(52105232);教育部产学研协同育人项目(202101068002,202102122012);中国矿业大学(北京)本科教育教学改革与研究项目(J220417);中国矿业大学(北京)大学生创新训练项目(202104036);中央高校基本科研业务费专项资金(2022YQJD02)。

摘　　要：虚拟仿真教学是新工科背景下培养专业人才的工程实践能力和创新意识的有效途径之一。随着内燃机不断向高强化程度发展,活塞作为内燃机的核心零部件,承受着更高的热机负荷,普通全铝合金活塞已无法满足使用需求。选取了TC11钛合金和TC4(3D打印)钛合金分别作为活塞头部材料,并采用了ABAQUS有限元数值模拟软件对活塞进行热-机耦合数值模拟。结果表明:组合活塞的隔热率随着钛顶厚度的增大而增大。当头部厚度为8 mm时,TC11钛顶铝基组合活塞和TC4(3D打印)钛顶铝基组合活塞的隔热率分别为49.44%和41.08%。此外,考虑活塞第一环槽平均温度、活塞散热量、顶部材料高温性能等多个影响因素,采用多目标优化方法建立活塞的整体热流评价模型,分别对两种组合活塞进行满意度评估,由此得出TC11钛顶铝基组合活塞为最优设计方案。Numerical simulation teaching is an essential way to cultivate the ability of engineering practice and the innovation consciousness of the professionals in the context of the“new engineering”.Because internal combustion engines continue to pursue high power density and high degree of reinforcement,pistons,as the core components of the engine,are exposed to higher thermal and mechanical loads that are the traditional aluminum alloy piston cannot handle the service demands.The TC11 titanium alloy and TC4(3D printing)titanium alloy are selected as the head materials for proper heat insulation research.ABAQUS finite element software is used to conduct thermal-mechanical coupled numerical simulation of the pistons.The results show that the heat insulation degree of the piston increases with the increase of the titanium alloy thickness.When the thickness of the titanium alloy thickness is 8 mm,the heat insulation degree of TC11 titanium top aluminum-based composite piston and TC4 titanium top aluminum-based one are respectively 49.44%and 41.08%.In addition,considering the average temperature of the first ring groove,the heat dissipation of the piston,and the high temperature performance of the top material,a multi-objective optimization method is used to establish the overall heat flow evaluation model of the piston.By comparing the satisfactions of the above two kinds of pistons,the composite piston with 8 mm TC11 thickness is the optimal design.

关 键 词：组合活塞 数值模拟 温度场 隔热率 实践教学 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]