The Numerical Modelling Of Heat Transfer In
Turbine Blades
Author(s)
J.A. Visser, A.M. Lippert & J. du Plessis
Abstract
The numerical modelling of heat transfer in
turbine blades
J.A. Visser, A.M. Lippert & J. du Plessis
Department of Mechanical Engineering,
University of Pretoria, South Africa
ABSTRACT
Advanced aircraft engines employ turbine entry temperatures so high that cooling of
the turbine blades is crucial. This paper focuses on the ribs generally used to enhance
the heat transfer in turbine blade cooling passages. 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. The flow in a channel with four
consecutive ribs on two opposite walls and a blockage ratio equal to 0.063 were
simulated for angles of 90° and 60° to the flow direction and a Reynolds number of
80000. An inlet condition approximating fully developed flow in a smooth duct were
used. In the case of the 60° angl
Keywords
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