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Calculation of Temperature Distribution in End Region of Large Turbogenerator Under Different Cooling Mediums

机译:不同冷却介质下大型汽轮发电机端部温度分布的计算

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In order to study the influence of different cooling mediums on the fluid velocity and the temperature distribution of end parts in the turbogenerator end region, a 330-MW turbogenerator is analyzed. Three-dimensional fluid-thermal coupling analysis model of the turbogenerator end region is given. When the different cooling mediums are used, fluid velocity of fan inlet and pressure values of end-region outlet from the flow network calculation are applied to the end region as boundary conditions, and the losses from 3-D transient electromagnetic field calculation are applied to the end parts as heat sources in the fluid-thermal coupling field. The fluid field and temperature field in the turbogenerator end region are calculated using the hydrogen and air as cooling medium, respectively. Fluid velocity and temperature of end parts in the turbogenerator end region are compared when the different cooling mediums are used. When the hydrogen is used as the cooling medium, comparing the calculated temperature results with the test values, the calculated temperature results match well with test values. These will provide a reference for the ventilation cooling design of large turbogenerator.
机译:为了研究不同冷却介质对涡轮发电机端部区域中的流体速度和端部温度分布的影响,分析了330 MW涡轮发电机。给出了汽轮发电机端部区域的三维流热耦合分析模型。当使用不同的冷却介质时,将风扇入口的流速和流网络计算得出的端部区域出口压力值作为边界条件应用于端部区域,并将3-D瞬变电磁场计算中的损失应用于在流体-热耦合领域中,末端部分作为热源。分别使用氢气和空气作为冷却介质来计算涡轮发电机端部区域中的流场和温度场。当使用不同的冷却介质时,将比较涡轮发电机端部区域中端部的流体速度和温度。当使用氢气作为冷却介质时,将计算出的温度结果与测试值进行比较,计算出的温度结果与测试值非常吻合。这些将为大型涡轮发电机的通风冷却设计提供参考。

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