【摘要】 为提高对水轮发电机定子温升计算的精确性,依据传统设计公式及流体相似理论确定径向通风沟表面散热系数,综合考虑通风系统特殊性和电机发热计算,采用Ansys11软件进行有限元分析,得出计算定子温度场的简化模型.通过加载计算所得边界条件,对灯泡贯流式水轮发电机的定子三维温度场进行数值模拟,计算出额定工况下定子温度场的稳态结果.同时采用等效热阻网络法进行计算.将两者计算出的结果与实验数据进行对比,有限元法的计算结果明显比传统方法计算结果更加精确.更多还原

【Abstract】 To improve the calculating precision of stator’s temperature rise of hydro-generator,according to the superficial heat transfer coefficient of radial ventilation duct worked out by the conventional design formula and fluid similarity theory,considering the specificity of ventilation system and the calculations of electric generator heating,a simplified model to calculate temperature field of stator was proposed based on finite element analysis by using Ansys11 tool.On the calculated boundary condition,a 3D temperature field numerical simulation for stator of bulb type hydrogenerator was proceeded,and subsequently a steady state result of stator temperature field on the rated condition was presented.Alternativelyt,he stator temperature was calculated by using equivalent thermal resistance network method as well.Comparison of the two calculation results with experimental data proves that the result obtained by using finite element method is apparently more accurate than that by using traditional method.更多还原