平行流式电机周向水套结构参数对散热性能影响研究

针对电力机车上某功率密度为1.27 kW/kg的平行流式电机周向水套结构的散热问题进行了研究。首先利用热阻网络法建立了平行流多通道截面的热阻数学模型;然后借助FLUENT软件对水套的电机散热过程进行了数值模拟,并对结构参数进行了优化;最后通过实验验证了计算的正确性。结果表明:当通道孔数n增大时,总热阻普遍减小;当通道单孔宽度x增大时,总热阻先增大后减小,当n=6个、x=1.670 mm时,水套具有最佳的散热性能;水套各测温点的数值模拟温度与实验测量温度之间的相对误差均低于5.00%。

Research on influence of structural parameters of parallel flow motor on the heat dissipation performance

The heat dissipation of the circumferential water jacket structure of a parallel flow motor with given power density of 1.27kW / kg on electric locomotives. First of all, the thermal resistance mathematical model of the cross section of the parallel flow porous channel is established by the thermal resistance network method. Then the FLUENT software is used to numerically simulate the heat dissipation process of the water jacket, and the structural parameters are optimized. Finally, the calculation is verified by experiments correctness. The results show that the total thermal resistance generally decreases along with the number of holes n increases. The total thermal resistance increases first and then decreases, if the single hole width x increases. When n = 6, x = 1.67mm, The water jacket has the best heat dissipation performance; the relative error between the numerical simulation temperature and the experimental measurement temperature of each water temperature measurement point of the water jacket is less than 5%.