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TECHNICAL PAPERS: Forced Convection

The Optimum Height of Winglet Vortex Generators Mounted on Three-Row Flat Tube Bank Fin

[+] Author and Article Information
S. D. Gao, L. B. Wang, Y. H. Zhang, F. Ke

Department of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, P.R. of China

J. Heat Transfer 125(6), 1007-1016 (Nov 19, 2003) (10 pages) doi:10.1115/1.1621900 History: Received January 09, 2003; Revised July 29, 2003; Online November 19, 2003
Copyright © 2003 by ASME
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References

Fiebig,  M., 1998, “Vortices, Generators and Heat Transfer,” Chem. Eng. Res. Des., 76(A2), pp. 108–123.
Fiebig,  M., 1995, “Vortex Generators for Compact Heat Exchangers,” J. Enhanced Heat Transfer, 2, pp. 43–61.
Jacobi,  A. M., and Shah,  R. K., 1995, “Heat Transfer Surface Enhancement Through the Use of Longitudinal Vortices: A Review of Recent Progress,” Exp. Therm. Fluid Sci., 11, pp. 295–309.
Tiggelbeck,  S., Mitra,  N. K., and Fiebig,  M., 1994, “Comparison of Wing-Type Vortex Generators for Heat Transfer Enhancement in Channel Flows,” J. Heat Transfer, 116, pp. 880–885.
Fiebig,  M., Valencia,  A., and Mitra,  N. K., 1994, “Local Heat Transfer and Flow Losses in Fin-Tube Heat Exchanger With Vortex Generators: A Comparison of Round and Flat Tubes,” Exp. Therm. Fluid Sci., 8, pp. 35–45.
Chen,  Y., Fiebig,  M., and Mitra,  N. K., 1998, “Heat Transfer Enhancement of a Finned Oval Tube With Punched Longitudinal Vortex Generator In-line,” Int. J. Heat Mass Transfer, 41, pp. 3961–3978.
Wang,  L. B., Ke,  F., Gao,  S. D., and Mei,  Y. G., 2002, “Local and Average Characteristics of Heat/Mass Transfer Over Flat Tube Bank Fin With Four Vortex Generators Per Tube,” J. Heat Transfer, 124, pp. 446–552.
Wang,  L. B., Zhang,  Y. H., Su,  Y. X., and Gao,  S. D., 2002, “Local and Average Heat/Mass Transfer Over Flat Tube Bank Fin Mounted In-line Vortex Generators With Small Longitudinal Spacing,” J. Enhanced Heat Transfer, 9(2), pp. 77–87.
Yun,  Y. L., and Lee,  K. S., 2000, “Influence of Design Parameters on the Heat Transfer and Flow Friction Characteristics of the Heat Exchanger With Slit Fins,” Int. J. Heat Mass Transfer, 43, pp. 2529–2539.
Goldstein,  R. J., 1995, “A Review of Mass Transfer Measurements Using Naphthalene Sublimation,” Exp. Therm. Fluid Sci., 10, pp. 416–434.
Saboya,  F., and Sparrow,  E. M., 1974, “Local and Average Transfer Coefficients for One-Row Plate Fin and Tube Heat Exchanger Configurations,” J. Heat Transfer, 96, pp. 265–272.
Kylikof, U. A., 1988, The Cooling System of Diesel Locomotive, Machine-Manufacturing, Moscow, (in Russian).
Moffart,  R. J., 1982, “Contribution to the Theory of Single-Sample Uncertainty Analysis,” J. Heat Tansfer, 104, pp. 250–260.
Tiggelbeck,  S., Mitra,  N. K., and Fiebig,  M., 1992, “Flow Structure and Heat Transfer in a Channel With Multiple Longitudinal Vortex Generators,” Exp. Therm. Fluid Sci., 5, pp. 425–436.
Tiggelbeck,  S., Mitra,  N. K., and Fiebig,  M., 1993, “Experimental Investigations of Heat Transfer Enhancement and Flow Losses in a Channel With Double Rows of Longitudinal Vortex Generators,” Int. J. Heat Mass Transfer, 36, pp. 2327–2337.

Figures

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Schematic view of a finned 3-row flat tube bank with mounted delta winglet vortex generators
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Experimental setup: (a) flow passages between fins; (b) plate forming flow passage; (c) fin surface I; (d) fin surface II; and (e) flat tube cast out of naphthalene.
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Flat tube bank parameters and positions of VGs: (a) configuration; (b) shape of VG; and (c) positions of 9 labeled cross-sections.
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Numerical model to get the heat transferred from fin: (a) channel of simulation model; (b) domain of simulation; and (c) grid system.
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Comparison of local Nu distribution on fin surface II: (a) without VGs, Re=1797; (b) with VGs, Re=1853,H=3 mm; (c) with VGs, Re=1836,H=4 mm; and (d) with VGs, Re=1796,H=5 mm.
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Comparison of local Nu distribution on fin surface I: (a) with VGs, Re=1853,H=3 mm (b) with VGs, Re=1836,H=4 mm; and (c) with VGs, Re=1796,H=5 mm.
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Effects of H on spanwise local Nu/Nu0 on fin surface II
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Effects of H on spanwise local Nu/Nu0 on fin surface I
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Comparison of span-averaged Nu on the fin surfaces I and II at different H
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Effects of H on span-averaged Nu on the fin surfaces I and II
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Effects of H on average Nu and f at different Re
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Effects of fin thickness on optimum H
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Effects of fin materials (heat conductivity) on optimum H

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