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题名	卧式蒸冷却电机楔形气隙内流体流动和传热问题的研究; 卧式蒸冷却电机楔形气隙内流体流动和传热问题的研究
作者	1阎洪峰,电工研究所
学位类别	硕士
答辩日期	2005-09-22
授予单位	中国科学院电工研究所
导师	1熊楠,电工研究所
其他题名	卧式蒸冷却电机楔形气隙内流体流动和传热问题的研究
学位专业	电机与电器
中文摘要	本文通过数值和实验手段研究了卧式蒸发冷却电机楔形气隙中的流体流动、传热现象。本文在定子套筒和转子表面光滑的假设下，针对蒸发冷却电机定子套筒壁面基本恒温的特点，将实际蒸发冷却电机简化为同轴套筒内筒加热旋转、外筒静止定温的物理模型。通过对环形横截面内二维气隙流场的研究，说明在本文研究问题中，旋转流对自然流具有强烈的抑制作用，从而将实际上的三维流场简化为轴对称准三维流场进行研究。采用准三维轴对称的计算模型，对楔形气隙的流场进行了研究，验证了高速旋转情况下，环形间隙流场中充满Tay！or涡流的现象及相关规律。在此基础上对轴向楔形气隙内轴向风量形成机理作出了解释。通过传热计算说明楔形气隙所产生的轴向风量对转子具有一定散热能力，并且随着转速升高，轴向风量相应增大。但随着转子发热量增大，气隙轴向风量带走热量占总热量的比例下降。转子高热负荷条件下，该模型建模条件下由气隙楔度所产生的轴向风量对总散热能力的贡献较小。为了验证计算结果，设计并建立了与计算模型尺寸相同的卧式蒸发冷却电机楔形气隙旋转实验装置。测量了楔形气隙流体出口（大间隙端口）外1厘米处空气流速大小的分布，发现空气流速自转子（内筒）壁面处开始逐步增大，至定子（外筒）壁面处达到最大值，随后开始减小。针对实验情况进行了相应的计算分析，验证了实验曲线与计算曲线具有相同的变化趋势。并对实验数据与计算结果之间的误差进行了分析。文末针对本文工作的局限性，对后续研究工作提出了建议。 Gas-flow and heat-transfer in the wedge-shape air-gap of horizontal evaporation cooling motor is studied by numerical method and experiment. Under the assumption that the inner surface of stator sleeve and outer surface of rotor are smooth, taking the fact into account that the temperature of stator sleeve of evaporation cooling motor keeps almost the same, horizontal evaporation cooling motor is simplified as a physical model of two coaxial sleeves, with outer sleeve (the stator) holds still and keep at constant temperature and inner sleeve (the rotor) is rotating and heated. The gas-flow in the annular cross section is study, and it is clarified that in such a physical model when rotor is rotating at high speed, the nature-flow is restrained by rotating-flow, so the actual 3D gas-flow field in the wedge-shape air-gap can be simplified to an axial symmetric quasi-3D gas-flow field. With this axial symmetric quasi-3D model, the gas-flow field in such a wedge-shape air-gap is studied, the phenomena about Taylor vortex in such a narrow wedge-shape air-gap is illuminated and the so caused gas-flow in axial direction is explained. The heat-transfer calculation proves that this axial direction gas-flow can do good to the rotor heat-emitting. When the rotating speed of rotor increases, the quantity of the axial gas-flow increases two. But when the heat load of rotor increases, the ratio of the heat bring by the axial direction gas-flow to the total heat load decreases. Under the condition mention in this physical model, when there is a high rotor heat load, the effect of the axial direction gas-flow to the total heat-emitting capability is not very great. An experiment instrument of horizontal evaporation cooling motor with the same dimension such the calculation model is designed and established. The distribution of the gas-flow speed is measured at a position lcm away from the outlet (the end with larger air-gap). It is illustrated that the gas-flow speed keeps increasing from the out surface of the inner sleeve to the inner surface of the outer sleeve, and then it decreases gradually. This trend is the same as the calculation result. The error between the experiment result and calculation is discussed. At the end of this thesis, some suggestion is mentioned for future research work.
语种	中文
公开日期	2010-10-18
页码	57
内容类型	学位论文
源URL	[http://ir.iee.ac.cn/handle/311042/7261]
专题	电工研究所_其他部门_其他部门_硕士学位论文
推荐引用方式 GB/T 7714	1阎洪峰,电工研究所. 卧式蒸冷却电机楔形气隙内流体流动和传热问题的研究, 卧式蒸冷却电机楔形气隙内流体流动和传热问题的研究[D]. 中国科学院电工研究所. 2005.

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