摘要
本文根据某电机通风冷却系统的总体流动性能分析结果,采用数值模拟方法分析了该电机转子冷却系统中形状最为复杂、流动损失最大的旋转槽道内部三维流场.采用区域分块与边界拼接方法建立网格系统,数值计算结果表明,该旋转槽道内结构存在改进空间.为减少流动的局部阻力损失,对原模型流道结构进行改进,并建立了新的三维模型.新模型数值模拟结果表明,改进后的结构可以在保证换热效果基本保持不变的情况下,大大降低槽道内部流动损失.
On the basis of an overall analysis of the cooling system in the electric motor, one of the ducts in the cooling system is found to have the most complicated structure of all and the flow in it makes the most pressure loss. A numerical experiment is made for the duct. As the complication of the physical model of the duct, the technique of multi-blocks and face connection is used while building the grid, the analysis of the interior flow downstream suggests that the duct needs to be improved. After making several improvements on the old designs that are proved to cause much pressure loss and make little attributes to the cooling rate, a new 3D model is built and analyzed. The numerical simulation indicates that, comparing with the old structure of duct 1, the flow loss along the new duct reduces a lot, while the cooling rate changes little.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第10期1679-1681,共3页
Journal of Engineering Thermophysics
关键词
电机冷却
流动模拟
阻力损失
cooling system of electric motor
flow simulation
pressure loss
