Numerical and Experimental Modelling of Gas Flow and Heat Transfer in the Air Gap of an Electric Machine

作     者：Maunu KUOSA Petri SALLINEN Jaakko LARJOLA 

作者机构：Lappeenranta University of Technology (LUT) Department of Energy and Environmental Technology P.O. Box 20 53851 Lappeenranta FinlandLappeenranta University of Technology (LUT) Department of Energy and Environmental Technology P.O. Box 20 53851 Lappeenranta FinlandLappeenranta University of Technology (LUT) Department of Energy and Environmental Technology P.O. Box 20 53851 Lappeenranta Finland 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2004年第13卷第3期

页      面：264-278页

核心收录：

学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：High Speed Tech Oy Ltd National Technology Agency 

主　　题：heat transfer electric machine air gap friction coefficient CFD. 

摘      要：This work deals with the cooling of high-speed electric machines, such as motors and generators, through an air gap. It consists of numerical and experimental modeling of gas flow and heat transfer in an annular channel. Velocity and temperature profiles are modeled in the air gap of a high-speed test machine. Friction and heat transfer coefficients are presented in a large velocity range. The goals are reached acceptably using numerical and experimental research. The velocity field by the numerical method does not match in every respect the estimated flow mode. The absence of secondary Taylor vortices is evident when using time averaged numerical simulation.