高压异步电机外风扇流场数值计算及优化  

Numerical calculation and optimization of fluid flow field of external fan of high voltage asynchronous motors

作　　者：温嘉斌[1] 唐跃[1] 何金泽[1] 和海波[1] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,黑龙江哈尔滨150080

出　　处：《电机与控制学报》2013年第9期79-85,共7页Electric Machines and Control

基　　金：国家科技支撑计划(2008BAF34B04)

摘　　要：为了研究和提升电动机外风扇的冷却能力,依据计算流体力学理论,以YJKK500-4、2 500 kW中型高压异步电机为例,建立电机外风扇区域的三维数学模型和物理模型,给出相应的基本假设和边界条件,并进行数值计算和分析,得到了外风扇区域的三维流体场分布;计算并给出了风扇的外特性曲线,并用实验进行了验证;在风扇叶片长度不变的情况下,改变风扇叶片的偏转角度,通过分析风扇的主要性能参数和计算区域流体的流动特性,得到风扇叶片偏转角度的最优值。计算结果表明,风扇叶片的偏转角度直接影响风扇的冷却能力。研究结果为高效率电动机的风扇优化设计提供了理论依据。In order to study and improve the cooling capacity of external fan of motor, according to the theory of computational fluid dynamic（CFD）, a YJKK500-4, 2 500kW medium size high voltage asynchronous motor was taken as an example. Its 3D mathematical and physical model of external fan of the motor were created, and basic assumptions and boundary conditions were determined according to CFD theories. The fluid fields were calculated and analyzed, and fluid field distribution inside external fan was shown. The external characteristics curves were calculated and shown, and then they were verified by experiment. Based on the length of the fan blades as a constant, the deflection angle of fan blades was changed. The main performance parameters of fan and the fluid flow characteristics of the computational domain were analyzed, and the optimum value of deflection angle was obtained. The result shows that deflection angle of fan blades directly affects the cooling capacity of fan. It provides theoretical basis for optimal design of external fan of efficient motors.

关 键 词：高压异步电动机 外风扇 外特性 流体场 优化设计 

分 类 号：TM301.4[电气工程—电机]