电涡流缓速器转子盘风道散热结构参数影响分析

电涡流缓速器(ECR)实施缓速制动时将车辆行驶动能转化为热能,使得转子盘产生较大温升,导致其制动性能不稳定.针对这一现象本文提出在转子盘风道内安装圆柱扰流强化散热装置.为合理选择扰流圆柱结构尺寸,建立不同直径圆柱扰流强制散热结构转子盘单风道物理模型,采用K-ε标准双方程和能量方程分析各模型不同进口气流速度条件下热交换改...

Effect on Heat Dissipation Structure Parameters of Tunnel for Rotor Plate of Eddy Current Retarder

Kinetic energy of automobile could be transformed into heat energy when an eddy current retarder(ECR) starts braking.The temperature on the rotor plate rises rapidly to result in instable braking performance because of heat energy.For the above question,a cylindrical disturbance setup with forced heat dissipation is proposed to be installed in the rotor plate.To select the reasonable cylinder dimensions,the physical models of single tunnel are established.Heat exchange mechanism and performance of every model are analyzed using K-ε standard double equations and energy equation on condition that inlet airflow velocity is variable,and compared to the original model without disturbance components.The results show that the pressure drop increases with increase in cylinder diameter,the average convective heat transfer coefficient of former row is higher than that of next one,and the higher strengthening heat transfer coefficients on work plane and back plane of the blade are achieved after the disturbance components are installed,furthermore their effect on former is greater than on latter.