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Measurement and CFD Prediction of Heat Transfer in Air-Cooled Disc-Type Electrical Machines

Howey, D. A., Holmes, A. S. & Pullen, K. R. (2011). Measurement and CFD Prediction of Heat Transfer in Air-Cooled Disc-Type Electrical Machines. IEEE Transactions on Industry Applications, 47(4), pp. 1716-1723. doi: 10.1109/tia.2011.2156371


Accurate thermal analysis of axial flux permanent magnet (AFPM) machines is crucial in predicting maximum power output. Stator convective heat transfer is one of the most important and least investigated heat transfer mechanisms and is the focus of this paper. Experimental measurements were undertaken using a thin-film electrical heating method, providing radially resolved steady state heat transfer data from an experimental rotor-stator system designed as a geometric mockup of a through-flow ventilated AFPM machine. The measurements are compared with computational fluid dynamics (CFD) simulations using both 2D axisymmetric and 3D models. These were found to give a conservative estimate of heat transfer, with inaccuracies near the edge and in the transitional flow regime. Predicted stator heat transfer was found to be relatively insensitive to the choice of turbulence model used in the CFD simulations.

Publication Type: Article
Additional Information: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publisher Keywords: Axial flux permanent magnet machine, disc type machine, stator heat transfer, thermal analysis, CFD
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Science & Technology > Engineering
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