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Turbulence and Shear Flow Phenomena -1 First International Symposium

ISBN:
1-56700-135-1 (Print)

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

Charles R. Smith
Department of Mechanical Engineering and Mechanics Lehigh University Bethlehem, PA 18015, USA

Daniel R. Sabatino
Department of Mechanical Engineering and Mechanics Lehigh University Bethlehem, PA 18015, USA

Thomas J. Praisner
Pratt and Whitney 400 Main Street East Hartford, CT 06108, USA

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.