基于微结构特征的列车制动盘对流换热特性研究  

Research on the Convective Heat Transfer Characteristics of Train Brake Discs with Microstructure Features

作　　者：陈明亮 李志伟 黄莎 车正鑫 CHEN Ming-liang;LI Zhi-wei;HUANG Sha;CHE Zheng-xin(School of Rail Transportation,Wuyi University,Jiangmen 529020,China)

机构地区：[1]五邑大学轨道交通学院,广东江门529020

出　　处：《五邑大学学报（自然科学版）》2021年第2期38-44,共7页Journal of Wuyi University(Natural Science Edition)

基　　金：广东省创新强校工程青年创新人才类项目(2017KQNCX205);江门市基础与理论科学研究类科技计划项目(2020JC01009,2019JC01021);五邑大学高层次人才科研启动项目(2017RC37,2017RC36)。

摘　　要：制动盘是列车制动系统中的重要组成部件之一.为了进一步提升列车制动盘的散热性能及延长其使用寿命,本文利用三维建模软件对常规制动盘的盘面和散热筋建立球窝凹坑、半圆沟槽、直角沟槽和放射状网格沟槽等多种具有微结构特征的模型,并基于流体分析软件FLUENT和滑移网格技术模拟相同初始温度下的不同微结构特征制动盘转动时的强迫对流换热过程.对多种模型求解相同时间长度后,从其降温效率和对流换热系数比较出散热能力优劣.结果表明,在散热筋迎风面布置沟槽微结构可提升对流换热性能,相比原始散热筋,散热能力最佳的是放射状网格散热筋,可提升散热效率约5.53%;在盘体侧面布置沟槽微结构反而不利热量散失,原始光滑盘面的对流换热能力已经最佳.The brake disc is one of the important components in the train braking system.In order to further improve the heat dissipation performance of train brake discs and prolong its service life,this paper uses three-dimensional modeling software to create ball-and-socket pits,semicircular grooves,right-angle grooves and radial grid grooves on the disc surface and heat dissipation ribs of conventional brake discs to simulate the forced convection heat transfer process,based on the fluid analysis software FLUENT and sliding grid technology,when the brake discs with different microstructure characteristics rotate at the same initial temperature.The cooling efficiency and convective heat transfer coefficient are compared to find out the advantages and disadvantages of the cooling ability.The results show that the groove microstructure arranged on the windward side of the radiator fin can improve the convective heat transfer performance.Compared with the original radiator fin,the radiator mesh fin has the best heat dissipation capacity,which can improve the heat dissipation efficiency by about 5.53%.On the contrary,the groove microstructure on the side of the plate is not conducive to heat loss and the convective heat transfer capacity of the original smooth plate is the best.

关 键 词：铁路列车 微结构特征 制动盘 对流换热 

分 类 号：U270.2[机械工程—车辆工程]