TECHNICAL PAPERS: Forced Convection

Heat Transfer in Two-Pass Rotating Rectangular Channels (AR=1:2 and AR=1:4) With Smooth Walls

[+] Author and Article Information
Wen-Lung Fu, Lesley M. Wright, Je-Chin Han

Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843-3123

J. Heat Transfer 127(3), 265-277 (Mar 24, 2005) (13 pages) doi:10.1115/1.1857946 History: Received December 28, 2003; Revised September 08, 2004; Online March 24, 2005
Copyright © 2005 by ASME
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Typical turbine blade internal cooling passages
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Schematic of the test rig
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Geometry of the test section: Smooth wall
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Cross-sectional view of the two-pass rectangular test section (AR=1:2)
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Conceptual view of the secondary flow patterns (AR=1:2)
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Conceptual view of the secondary flow patterns (AR=1:4)
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Nusselt number ratio distribution for AR=1:2 with smooth wall
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Nusselt number ratio distribution for AR=1:4 with smooth wall
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Channel averaged Nusselt number ratio for both rotating and nonrotating cases
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Comparison of the Nusselt number ratio distributions for AR=1:2 with smooth walls
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Secondary flow effect on circumferential heat transfer (Re=10,000) (number represents the Nusselt number ratio)
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Aspect ratio effect on heat transfer (β=90°)
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Aspect ratio and channel orientation effect on heat transfer (β=90°,45°, and 135°)



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