WIT Press


The Evaluation Of A New Model To Simulate Heat Transfer Enhancement In Ribbed Channels

Price

Free (open access)

Paper DOI

10.2495/HT960111

Volume

12

Pages

10

Published

1996

Size

953 kb

Author(s)

J.A. Visser, H.N. de Jager & L.J. Grobler

Abstract

The improvement of overall performance in power to mass ratio of modern gas turbines can greatly be contributed to the effective cooling of the turbine blades. Optimization of coolant performance is essential as the coolant flow introduces losses which need to be minimized. This paper introduces a new model to simulate heat transfer in ribbed channels. In the ribbed sections large variations in turbulence levels occure and the secondary flows associated with these ribs are responsible for significant local heat transfer variations. Furthermore, the ribs produce a complex flow structure so that there is continuing need for a better understanding of the flow physics in ribbed ducts. A finite difference simulation of the fluid flow and temperature distribution in the i

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