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RESEARCH PAPER

Heat Transfer Enhancement for Finned-Tube Heat Exchangers With Winglets

[+] Author and Article Information
James E. O’Brien, Manohar S. Sohal

Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID 83415

J. Heat Transfer 127(2), 171-178 (Mar 15, 2005) (8 pages) doi:10.1115/1.1842786 History: Received November 07, 2003; Revised April 21, 2004; Online March 15, 2005
Copyright © 2005 by ASME
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References

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, 295–309.
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(9), 2327–2337.
Torii, K., Nishino, K., and Nakayama, K., 1994, “Mechanism of Heat Transfer Augmentation by Longitudinal Vortices in a Flat Plate Boundary Layer,” Proc. Tenth Int. Heat Transfer Conf., Hemisphere, New York, Vol. 6, pp. 123–128.
Fiebig,  M., Valencia,  A., and Mitra,  N. K., 1993, “Wing-Type Vortex Generators for Fin-and-Tube Heat Exchangers,” Exp. Therm. Fluid Sci., 7, 287–296.
Chen,  Y., Fiebig,  M., and Mitra,  N. K., 1998, “Conjugate Heat Transfer of a Finned Oval Tube Part B: Heat Transfer Behaviors,” Numer. Heat Transfer, Part A, 33, 387–401.
Chen,  Y., Fiebig,  M., and Mitra,  N. K., 1998, “Heat Transfer Enhancement of a Finned Oval Tube with Punched Longitudinal Vortex Generators In-line,” Int. J. Heat Mass Transfer, 41, 4151–4166.
O’Brien, J. E., and Sohal, M. S., 2000, “Local Heat Transfer for Finned-Tube Heat Exchangers using Oval Tubes,” Proceedings, 2000 ASME National Heat Transfer Conference, Pittsburgh, August, Paper no. NHTC2000-12093.
“TIFF revision 6.0,” 1992 Adobe Developers Association, Adobe System Incorporated, June.
Incropera, F. P., and DeWitt, D. P., 1990, Fundamentals of Heat and Mass Transfer, 3rd ed., J. Wiley, New York.
Moffatt,  R. J., 1982, “Contributions to the Theory of Single-Sample Uncertainty Analysis,” ASME J. Fluids Eng., 104, 250–260.

Figures

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Winglet locations and geometry: (a) winglet-only case, (b) circular cylinder plus winglets
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Local fin-surface heat transfer coefficients for a delta-winglet pair
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Spanwise variation of local heat transfer coefficient for delta-winglet-pair configuration
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Local fin-surface heat transfer distributions for circular cylinder plus winglets
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Direct comparison of local heat transfer distributions for a circular cylinder with and without winglets
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Spanwise variation in local wake-region heat transfer coefficient, with and without winglets, ReH=1200

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