某新型通风方式空冷汽轮发电机转子三维温度场  

Temperature Field of One Air-Cooled Turbo-Generator Rotor With New Ventilation Type

作　　者：路义萍[1] 陈朋飞[1] 邓海燕[1] 韩家德[1] 

机构地区：[1]哈尔滨理工大学机械动力工程学院,哈尔滨150080

出　　处：《电工技术学报》2010年第11期29-35,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50976027);黑龙江省自然科学基金(E200807);黑龙江省教育厅基金(11541056)资助项目

摘　　要：某空冷汽轮发电机转子冷却风道采用新型通风方式,为了分析该转子内部温度分布特点,建立了该汽轮发电机转子8号槽半轴向段整体结构模型。依据计算流体动力学(CFD)原理,采用有限体积法,对转子三维温度场进行了计算。得到了冷却空气、绕组、绝缘材料、槽楔、铁心的温度分布,以及副槽段径向风孔内表面传热系数。结果表明:该种通风方式下,绕组温度沿轴向逐渐升高;转子端部绕组温度较低,绕组峰值温度位于副槽段转子中心对称面处。该结论为大型空冷汽轮发电机转子热设计提供理论参考。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.

关 键 词：温度场 数值模拟 转子 汽轮发电机 通风方式 

分 类 号：TM311[电气工程—电机]