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RESEARCH PAPER

Computational Analysis of Heat Transfer Enhancement in Square Ducts With V-Shaped Ribs: Turbine Blade Cooling

[+] Author and Article Information
R. Jia, B. Sundén

Division of Heat Transfer, Lund Institute of Technology, P.O. Box 118, 221 00 Lund, Sweden  

M. Faghri

Mechanical Engineering & Applied Mechanics, University of Rhode Island, Kingston, Rhode Island 02881

J. Heat Transfer 127(4), 425-433 (Mar 30, 2005) (9 pages) doi:10.1115/1.1865220 History: Received February 27, 2004; Revised October 21, 2004; Online March 30, 2005
Copyright © 2005 by ASME
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References

Figures

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Geometry of a straight square duct (a) with one-sided transverse ribs, (b) grid for the inline V ribs, (c) with two-sided inline V ribs, and (d) with two-sided staggered V ribs
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Grid independence test for LES of the 90° ribbed case
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Normalized Nusselt number at the ribbed wall in comparison with the experiments of Rau et al.
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Normalized Fanning friction factors, average Nusselt numbers of different rib configurations and Reynolds number at the ribbed and smooth side-walls: (a) The inline V ribs with e/Dh=0.0625, and the lines with open symbols are from the numerical solution, while the solid symbols are from the experimental data of Han et al. 2. (b) The staggered V-ribs with e/Dh=0.0625, and the experimental data are from Taslim et al. 5 for e/Dh=0.083.
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The simulated fluid flow and heat transfer structure in ducts ribbed with inline V ribs at Re=15,000: (a) ≫ ribs and, (b) ≪ ribs
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Normalized Fanning friction factors, average Nusselt numbers of different rib configurations, and Reynolds number at the ribbed and smooth side-walls of the staggered V ribs with e/Dh=0.125
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Effect of SSW heating on the RSW Nu: (a) the comparison at the symmetry line, (b) no SSW heating, and (c) with SSW heating
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Deviation (%) from the average Nu for (a) ≫ ribs and (b) ≪ ribs

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