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TECHNICAL PAPERS: Heat Transfer Enhancement

Heat Transfer and Fluid Flow in a Square Duct With 12 Different Shaped Vortex Generators

[+] Author and Article Information
T.-M. Liou, C.-C. Chen

T.-W. Tsai

Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30043, R.O.C.

J. Heat Transfer 122(2), 327-335 (Dec 01, 1999) (9 pages) doi:10.1115/1.521487 History: Received March 27, 1999; Revised December 01, 1999
Copyright © 2000 by ASME
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References

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Figures

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Sketch of configuration, coordinate system, and dimensions of vortex generator and test section
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Schematic drawing of overall experimental system
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Streamwise mean velocity and turbulence intensity profiles at inlet reference station X=0 (smooth wall)
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Detailed local Nusselt number ratio distributions near 12 different configurations of SVG at Re=1.2×104 (fluid flow from right to left)
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Secondary flow patterns and turbulent kinetic energy contours at a selected cross section located 3 mm behind a SVG for Re=1.2×104: (C) 45 deg V U_ VG; (D) 45 deg V D_ VG; and (G) delta wing I U_ VG. (Note that the secondary flow patterns are plotted facing the downstream direction.)
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Vector plot of the flow patterns near a SVG along Z=0 plane for Re=1.2×104: (C) 45 deg V U_ VG and (G) delta wing I U_ VG.
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The spanwise distributions of (1) Nu/Nu0, (2) U/Ub, (3) −V/Ub, and (4) k/Ub2 at a stage 1H (3 mm) behind a SVG for Re=1.2×104: (C) 45 deg V U_ VG; (D) 45 deg V D_ VG; and (G) delta wing I U_ VG (LDV measurements performed at 1-mm distance away from the wall Y/B=0)
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Detailed local Nusselt number ratio distributions around VG in an array: (C) 45 deg V U_ VGA and (G) delta wing I U_ VGA.
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Mean velocity vector plots of flow patterns in a pitch module along Z=0 plane for Re=1.2×104: (C) 45 deg V U_ VGA and (G) delta wing I U_ VGA.
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Streamwise distributions of (1) spanwise averaged Nu/Nu0 and (2) wall static pressure coefficient in VGAs along Z=0 plane for Re=1.2×104: (C) 45 deg V U_ VGA and (G) delta wing I U_ VGA

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