长下坡工况中通风制动盘热性能的仿真分析  

Simulation Analysis of Thermal Property of Vented Brake Disk during Long Downhill Condition

作　　者：杨志刚[1] 吴佳伟[1] 

机构地区：[1]同济大学 上海地面交通工具风洞中心,上海201804

出　　处：《佳木斯大学学报（自然科学版）》2014年第2期182-186,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)(2011CB711203)

摘　　要：汽车在长下坡工况中,驾驶员需要通过轻踩刹车,使得汽车维持安全稳定的速度下坡,此时的制动盘处于拖磨的状态,温度会不断上升,极有可能产生制动热衰退的风险.为了研究在长下坡工况中制动盘的温升情况,本文基于fluent仿真软件,对几种不同的坡度、车速和车重的长下坡工况中的通风制动盘的热性能进行仿真分析,得出了制动盘在长下坡拖磨工况中的盘体温度场及温升曲线,确定了坡度、车速和车重增大均使制动盘温升速率增大,而车速增大会使制动盘对流换热加强,最终制动盘温升速率会随时间推移逐渐减小,对设计汽车长下坡工况中制动器性能有参考作用.The driver has to keep braking during downhill condition to maintain the safe speed .The brake disc is being rubbed and the temperature will keep rising , likely to cause brake heat fade .To find out tempera-ture rising curve of brake disk during long downhill condition , the thermal properties of brake disk were simula-ted and analyzed under several different slopes , speeds and weights of the long downhill condition with fluent . Body temperature field and temperature rising curve of brake disk were estimated .It is sure that the temperature rising rate of brake disk increases if the slope , speed and vehicle weight increase , the speed increases the con-vection heat transfer enhancement of brake disk , and the temperature rising rate will decrease with time , which will be useful in designing automobile brake performance in long downhill condition .

关 键 词：制动盘 下坡 热性能 

分 类 号：U463.512[机械工程—车辆工程]