Abstract：In view of the rotor cooling structure with multi-path ventilation, in order to obtain more complete temperature distribution along the length direction of the rotor coils, a calculation model of three dimension heat transfer and turbulence is presented on basis of the research on the air flow rate distribution of the rotor's half axial segment, combined with a given example of some large turbo generator rotor with air cooling, and the model consists of rotor end winding and the half length of rotor. Based on computational fluid dynamics (CFD) principle, the temperature field of initial rotor ventilation structure is calculated by finite volume method. Based on the results, the number of ventilation ducts among the sub slot ventilation and the position of end inlet is adjusted to increase the end air flow rate and to decrease the temperature of rotor end windings and axial of the rotor end temperature difference among the rotor body windings. The results show that the maximum temperature is located in the mid arc segment of the top winding; the maximum temperature of the rotor body winding is locatein the axial ventilation segment. The conclusion will provide theoretical guidance to optimization design of rotor ventilation.
路义萍, 阴文豪, 韩家德, 李伟力, 李俊亭, 曹文, 靳慧勇. 汽轮发电机转子端部及槽内绕组温升[J]. 电工技术学报, 2010, 25(2): 1-5.
Lu Yiping, Yin Wenhao, Han Jiade, Li Weili, Li Junting, Cao Wen, Jin Huiyong. Winding Temperature Rise of Rotor End and Inner Slot of Turbo Generator. Transactions of China Electrotechnical Society, 2010, 25(2): 1-5.
2010, Vol. 25 
