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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN 打印: 1-56700-135-1

THE SPATIAL-TEMPORAL SURFACE HEAT TRANSFER/FLOW FIELD FOR A TURBULENT JUNCTION FLOW

Abstract

A water channel study of the instantaneous and time-mean flow topology for a turbulent junction flow, and the associated endwall heat transfer is presented. A new, temporally responsive test section and film-based imaging process are employed, allowing the simultaneous acquisition of both high-density Particle Image Velocimetry (PIV) and instantaneous endwall heat transfer data using thermochromic Liquid-Crystals (LC). Using this experimental system, the behavior of the junction-region flow structure and consequent surface heat transfer are established for both temporal sequences and time-mean averages. The strong influence of resident, but temporally active, junction region vortices in strongly elevating the local surface heat transfer is clearly demonstrated.
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