Conjugate heat transfer analysis of a salient pole rotor in an air cooled synchronous generator
Conjugate heat transfer analysis of a salient pole rotor in an air cooled synchronous generator
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DOI：
10.1109/iemdc.2003.1210318
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发表时间：
2003-06
期刊：
影响因子：
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通讯作者：
M. Shanel;S. Pickering;D. Lampard
中科院分区：
文献类型：
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作者：
M. Shanel;S. Pickering;D. Lampard
使用通用 CFD 代码对风冷 4 极发电机转子的传导和对流联合传热进行了研究。使用简化的发电机设计来演示在设计阶段分析凸极转子温度分布的技术。虽然 CFD 能够预测气流和对流热传递，但事实证明，还需要对热传导（包括损失中的热输入）进行建模，以生成真实的转子热模型。考虑了边缘带状线圈结构，结果表明，将线圈建模为具有各向异性导热率的均质材料可以为局部线圈温度的预测提供足够的精度。考虑了线圈尺寸和结构对冷却的影响。为了证明该方法的能力，对所考虑的测试模型进行了修改，其中修改了气流，从而增强了热对流并降低了励磁线圈温度。
A study of combined heat transfer by conduction and convection for the rotor of an air-cooled, 4-pole generator was carried out using a general purpose CFD code. A simplified generator design was used to demonstrate a technique to analyse temperature distribution through the salient pole rotor at the design stage. Whilst CFD has the capability to predict airflow and convective heat transfer, it is shown that it is also necessary to model heat conduction, including the heat input from the losses, to produce a realistic thermal model of the rotor. A strip-on-edge coil structure is considered and it is shown that modelling the coils as homogeneous materials with anisotropic thermal conductivity provides sufficient accuracy for the prediction of local coil temperatures. Consideration is given to the effect of the coil size and structure on the cooling. To demonstrate the capability of the method, a modification to the test model considered is presented in which the airflow is modified, leading to enhanced heat convection and field coil temperature reduction.