某大型空冷汽轮发电机转子采用导线双侧进风的冷却方式。为了研究轴径向绕组导线数量、中空导线的通流面积差异、导线位置(径向与周向)对导线内流量、进出口温度、进出口温度差、平均温度的影响，建立了包括端部弧段和轴径向段转子槽内外流域及与之对应的气隙在内的半轴段1/2圆三维物理模型。依据计算流体动力学原理，采用有限体积法，对计算域内的三维热流场进行了数值模拟。结果表明：位于绕组L1、圆周R12的导线具有的最大流量为0.0189 m3/s；温度最高导线位于绕组T5、圆周R2处，达129.10 ℃，在电机正常工作范围内；通过方差分析发现径向、周向位置分布对导线平均温度不均性的影响差异较小，而导线通流面积对其的影响较大。

A large air-cooled turbine generator rotor adopts the cooling mode of wind inlet from both sides of the wire. In order to study the influences of the number of conductors in the slots, the conductor flow areas and the radial and circumferential locations of conductors on the distribution in the hollow conductor mass flow, inletoutlet temperature difference and the average temperature, 1/2 circle and half rotor model is established, including end winding, winding active part, airgap and the fluid domain. According to the principle of computational fluid dynamics, the finite volume method is used to simulate the threedimensional heat flow field in the computational domain. The results show that the conductor located in circumference R12 and winding L1 has the maximum flow rate of 0.0189 m3/s, while the conductor at circumference R2 and winding T5 has the dangerous part with the highest temperature reaching 129.10 ℃, which is still within the rotor normal temperature range. Through the variance analysis, it is found that radial and circumferential position distribution has similar effects on the conductor average temperature heterogeneity, and the influence of the conductor flow area is greater.

国家重点基础研究发展计划（973计划）项目（2015CB251504）