Article ID Journal Published Year Pages File Type
648214 Applied Thermal Engineering 2010 11 Pages PDF
Abstract

In this paper, the effect of the numerical model, mass flow rate and inlet boundary conditions on the flow and temperature distributions in a disc-type transformer winding is investigated using a commercial CFD code. For the winding under investigation, it was found that the results obtained with simplified models are quite different from those computed with a complete Conjugate Heat Transfer model that considers the individual copper conductors forming the disc. The temperature profile (uniform or non-uniform) specified at the inlet of the winding is another parameter having a significant influence on the hot-spot temperature prediction and the paper stresses that a refined model is needed to capture this effect. The numerical results also indicate that a higher flow rate gives a more efficient cooling of the winding since the temperature distribution is more uniform and the hot-spot factor is reduced.

Related Topics
Physical Sciences and Engineering Chemical Engineering Fluid Flow and Transfer Processes
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