Abstract：In order to analyze the temperature distribution of an air-cooled turbo-generator with a new type ventilation system, a model for the NO.8 slot of half axis length is established. The 3D temperature field is calculated by using the finite volume method (FVM) based on the principle of computational fluid dynamics(CFD). Then the temperature distribution of cooling air, winding, insulating material, wedges and cord is obtained, as well as the surface heat transfer coefficient of radial air duct. The results show that, in this type of ventilation, the winding temperature gradually is increased along the axial direction; the rotor end is a low temperature part; the peak temperature of winding is located at the centrosymmetric face. The conclusion will provide theoretical references for thermal design of rotor of large turbo generator.
路义萍, 陈朋飞, 邓海燕, 韩家德. 某新型通风方式空冷汽轮发电机转子三维温度场[J]. 电工技术学报, 2010, 25(11): 29-35.
Lu Yiping, Chen Pengfei, Deng Haiyan, Han Jiade. Temperature Field of One Air-Cooled Turbo-Generator Rotor With New Ventilation Type. Transactions of China Electrotechnical Society, 2010, 25(11): 29-35.
[1] 廖毅刚, 侯小全. 全空冷汽轮发电机通风冷却研 究[J]. 东方电气评论, 2008(1): 1-8. [2] 陈楠. 220MW空冷汽轮发电机的通风及温升[J]. 电机技术, 2008(1): 52-54. [3] 关达生, 曹文. 国产空冷150MW汽轮发电机的设计特点[J]. 东北电力技术, 2005(5): 12-15. [4] 刘保生, 安志华, 韩荣娜. 空冷汽轮发电机转子温度场计算研究[J]. 上海大中型电机, 2008(4): 9-11. [5] 路义萍, 李伟力, 韩家德, 等. 大型汽轮发电机转子风道结构对空气流量分配影响[J]. 电工技术学报, 2008, 23(4): 20-24. [6] 胡晓红, 袁益超, 刘聿拯, 等. 汽轮发电机转子副槽通风冷却系统流动特性研究[J]. 中国电机工程学报, 2009, 29(5): 91-96. [7] Gray R F, Nelson R, Pipkin J. Designing the cooling systems for the world’s most powerful turbo generator: Olkiluoto unit 3[C]. 2006 Power Engineering Society General Meeting, Montreal, Quebec, Canada, 2006(1-9): 1624-1628. [8] Srinivas K N, Arumugam R. An investigation into the air velocity distribution inside switched reluctance motors[J]. Electric Power Components and Systems, 2004, 32(9): 893-900. [9] Bolund B, Leijon M. Rotor configuration impact on generator ventilation needs[C]. IEEE PES Power Systems Conference and Exposition, New York, USA, 2004, 2: 749-752. [10] Shanel M, Pickering S J, Lampard D, et al. Application of computational fluid dynamics to the cooling of salient pole electrical machines[C]. International Conference on Electrical Machines, Espoo, Finland, 2000: 338-342. [11] 路义萍, 阴文豪, 谈和平, 等. 汽轮发电机转子三维温度场耦合计算[J]. 工程热物理学报, 2008, 29(4): 659-661. [12] 陶文铨. 数值传热学[M]. 西安: 西安交通大学出版社, 2001. [13] 丁舜年. 大型电机的发热与冷却[M]. 北京: 科学出版社, 1992.
2010, Vol. 25 
