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

被引：28

作者：

Kuosa, Maunu ^{[1
]}

Sallinen, Petri ^{[1
]}

Larjola, Jaakko ^{[1
]}

机构：

[1] Lappeenranta Univ Technol, Dept Energy & Environm Technol, Lappeenranta 53851, Finland

来源：

JOURNAL OF THERMAL SCIENCE | 2004年 / 13卷 / 03期

关键词：

heat transfer; electric machine; air gap; friction coefficient; CFD;

D O I：

10.1007/s11630-004-0041-4

中图分类号：

O414.1 [热力学];

学科分类号：

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.

引用

页码：264 / 278

页数：15