电动汽车驱动电机冷却流道性能的数值模拟研究  

Numerical Simulation on Cooling Channel Performance of Driving Motor of Electric Vehicle

作　　者：沈超[1] 张艺哲 杨建中[1] 李欢 张东伟[2] SHEN Chao;ZHANG Yizhe;YANG Jianzhong;LI Huan;ZHANG Dongwei(School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China)

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2021年第6期68-73,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(51706208);河南省科技攻关项目(192102310244)。

摘　　要：为探究流道结构在4种不同功率下对电动汽车驱动电机的散热效果的影响,建立了机壳内部流体流动与换热的三维模型,采用Fluent仿真软件对2种不同流道结构的驱动电机在不同功率下的流场和温度场进行了计算。结果表明:当电机功率超过100 kW的时候,只有六通道流道结构的机壳能够满足散热要求。当电机功率为80 kW和90 kW时,四通道结构的内壁面最高温度分别比六通道结构高12.05%和12.48%,此时2种流道结构均能满足散热要求,但这2种功率下四通道结构的压力损耗分别比六通道结构降低了61.87%和61.38%。考虑到加工难度和机壳承压能力要求,在较低功率下应优先选用四通道周向“Z”字形流道结构。To explore the influence of channel structure on the heat dissipation effect of electric vehicle drive motor of four different powers,the three-dimensional model of fluid flow and heat transfer in the shell was established.Fluent simulation was employed to calculate the flow field and temperature field of two different channel structure drive motors of different power.The results showed that only the six-channel structure could supply the demand of the heat dissipation when the motor power was more than 100 kW.When the motor power was 80 kW and 90 kW,the maximum temperature of the inner wall surface of the four-channel structure was 12.05%and 12.48%higher than that of the six-channel structure,respectively.At this time,the two kinds of channel structure could meet the heat dissipation requirement,but the pressure loss of the four-channel structure was 61.87%and 61.38%lower than that of the six-channel structure under the two kinds of power,respectively.Therefore,considering the difficulty of processing and the pressure bearing capacity of the shell,the four-channel circumferential"Z"shape structure should be preferred at lower power.

关 键 词：电机冷却 FLUENT 强化换热 流道压力 流道结构 

分 类 号：TM301.4[电气工程—电机]