自循环蒸发冷却电机定子铁心与绕组间的热量传递  

Heat Transfer Between Stator Core and Windings in Hydro-generators With Self Pump Circulated Evaporation Cooling System

作　　者：刘长红[1] 姚若萍[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240

出　　处：《中国电机工程学报》2008年第11期107-112,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50277025);博士点基金项目(200220248005)~~

摘　　要：自循环蒸发冷却发电机存在空冷和蒸发内冷2套冷却系统,二者如何合理地分担电机的热负荷对于电机稳定高效地运行至关重要,目前这方面的理论研究尚未深入进行。难点在于难以直接建立定子三维温度场与空心股线内的两相流场耦合数值模型。在研究两相流场和空气流场的基础上,将热网络方法引入蒸发冷却电机温度场分析。和数值方法相比,热网络法模型精练,可以快速计算出冷却系统各个参数对传热的影响。通过与实测值对比,验证了计算方法的可行性和模型的准确性。Evaporating cooling system works in the hydro generator together with air cooling system. The coordination of these two systems is quite important to generator. So far theoretical research on heat distribution has not been investigated intensively due to the difficulties of building mathematic model for two-phase flow and the complexity of multi coupled physic fields. Based on the study of air flowing and two phase flowing, thermal network method was introduced in the temperature field calculation. Compared to the numerical method, the benefit of thermal network lies in the brevity and high efficiency, especially to qualitative analysis. The effectiveness has been verified by contrasting calculation results to the test values.

关 键 词：蒸发冷却 空冷 两相流 热量交换 热网络法 

分 类 号：TM312[电气工程—电机]