Title :
Analysis and calculation of nonlinear flow field and stator temperature field in stator radial ventilating grooves for large hydro-generator in the case of insulation aging
Author :
Yunpeng, Hou ; Weili, Li ; Feng, Zhou ; Shukang, Cheng
Author_Institution :
Harbin Inst. of Technol., China
Abstract :
In this paper, the coupling relation between wall temperature, surface coefficient of heat transfer and air speed in a hydrogenerator stator radial ventilating groove is used to set up the 3D stator nonlinear coupled field equations. The 3D isoparametric finite element method and Newton-Raphson method are applied to calculate the coupled nonlinear field. Finally, using a numerical simulation method, the influence of the insulation coefficient of heat conductivity on the stator temperature field is analyzed when the flow field in radial ventilating grooves varies in a nonlinear way
Keywords :
Newton-Raphson method; electric breakdown; finite element analysis; flow simulation; hydroelectric generators; machine insulation; machine theory; stators; temperature distribution; thermal analysis; ventilation; 3D isoparametric finite element method; 3D stator nonlinear coupled field equations; Newton-Rapbson method; Numerical Simulation Method; heat conductivity insulation coefficient; hydrogenerator stator radial ventilating grooves; nonlinear flow field; stator temperature field; surface heat transfer coefficient; wall temperature; Conductivity; Couplings; Finite element methods; Heat transfer; Insulation; Newton method; Nonlinear equations; Numerical simulation; Stators; Temperature;
Conference_Titel :
Electrical Machines and Systems, 2001. ICEMS 2001. Proceedings of the Fifth International Conference on
Conference_Location :
Shenyang
Print_ISBN :
7-5062-5115-9
DOI :
10.1109/ICEMS.2001.971880
