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| Temperature Field of One Air-Cooled Turbo-Generator Rotor With New Ventilation Type |
| Lu Yiping, Chen Pengfei, Deng Haiyan, Han Jiade |
| Harbin University of Science and Technology Harbin 150080 China |
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Abstract In order to analyze the temperature distribution of an air-cooled turbo-generator with a new type ventilation system, a model for the NO.8 slot of half axis length is established. The 3D temperature field is calculated by using the finite volume method (FVM) based on the principle of computational fluid dynamics(CFD). Then the temperature distribution of cooling air, winding, insulating material, wedges and cord is obtained, as well as the surface heat transfer coefficient of radial air duct. The results show that, in this type of ventilation, the winding temperature gradually is increased along the axial direction; the rotor end is a low temperature part; the peak temperature of winding is located at the centrosymmetric face. The conclusion will provide theoretical references for thermal design of rotor of large turbo generator.
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Received: 29 October 2009
Published: 04 March 2014
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2010, Vol. 25 
