0
TECHNICAL PAPERS: Forced Convection

Spatially Resolved Surface Heat Transfer for Parallel Rib Turbulators With 45 Deg Orientations Including Test Surface Conduction Analysis

[+] Author and Article Information
S. Y. Won, N. K. Burgess, S. Peddicord, P. M. Ligrani

Convective Heat Transfer Laboratory, Department of Mechanical Engineering, MEB 2110, University of Utah, Salt Lake City, UT 84112-9208, USA

J. Heat Transfer 126(2), 193-201 (May 04, 2004) (9 pages) doi:10.1115/1.1668046 History: Received June 06, 2003; Revised December 23, 2003; Online May 04, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.

References

Lau, S. C., 2001, “Enhanced Internal Cooling of Gas Turbine Airfoils,” Heat Transfer in Gas Turbines, S. Sunden, and M. Faghri, eds., WIT Press, Southampton, U.K., pp. 109–175.
Ligrani,  P. M., Oliveira,  M. M., and Blaskovich,  T., 2003, “Comparison of Heat Transfer Augmentation Techniques,” AIAA J., 41(3), pp. 337–362.
Han,  J. C., Glicksman,  L. R., and Rohsenow,  W. M., 1978, “An Investigation of Heat Transfer and Friction For Rib-Roughened Surfaces,” Int. J. Heat Mass Transfer, 21(7), pp. 1143–1156.
Han,  J. C., and Park,  J. S., 1988, “Developing Heat Transfer in Rectangular Channels With Rib Turbulators,” Int. J. Heat Mass Transfer, 31(1), pp. 183–195.
Han,  J. C., Zhang,  Y. M., and Lee,  C. P., 1991, “Augmented Heat Transfer in Square Channels With Parallel, Crossed, and V-Shaped Angled Ribs,” ASME J. Heat Transfer, 113, pp. 590–596.
Han,  J. C., Huang,  J. J., and Lee,  C. P., 1993, “Augmented Heat Transfer in Square Channels With Wedge-Shaped and Delta-Shaped Turbulence Promoters,” J. Enhanced Heat Transfer, 1(1), pp. 37–52.
Taslim,  M. E., Li,  T., and Kercher,  D. M., 1996, “Experimental Heat Transfer and Friction in Channels Roughened With Angled, V-Shaped, and Discrete Ribs on Two Opposite Walls,” ASME J. Turbomach., 118, pp. 20–28.
Taslim,  M. E., Li,  T., and Spring,  S. D., 1998, “Measurements of Heat Transfer Coefficients and Friction Factors in Passages Rib-Roughened On All Walls,” ASME J. Turbomach., 120, pp. 564–570.
Wang,  Z., Ireland,  P. T., Kohler,  S. T., and Chew,  J. W., 1998, “Heat Transfer Measurements to a Gas Turbine Cooling Passage With Inclined Ribs,” ASME J. Turbomach., 120, pp. 63–69.
Thurman, D., and Poinsatte, P., 2000, “Experimental Heat Transfer and Bulk Air Temperature Measurements for a Multipass Internal Cooling Model With Ribs and Bleed,” ASME Paper No. 2000-GT-233.
Cho, H. H., Lee S. Y., and Wu S. J., 2001, “The Combined Effects of Rib Arrangements and Discrete Ribs on Local Heat/Mass Transfer in a Square Duct,” ASME Paper No. 2001-GT-175.
Mahmood,  G. I., and Ligrani,  P. M., 2002, “Heat Transfer in a Dimpled Channel: Combined Influences of Aspect Ratio, Temperature Ratio, Reynolds Number, and Flow Structure,” Int. J. Heat Mass Transfer, 45(10), pp. 2011–2020.
Ligrani,  P. M., and Mahmood,  G. I., 2003, “Variable Property Nusselt Numbers in a Channel With Pin-Fins,” AIAA Journal of Thermophysics and Heat Transfer, 17(1), pp. 103–111.
Burgess,  N. K., Oliveira,  M. M., and Ligrani,  P. M., 2003, “Nusselt Number Behavior on Deep Dimpled Surfaces Within a Channel,” ASME J. Heat Transfer, 125(1), pp. 11–18.
Sargent,  S. R., Hedlund,  C. R., and Ligrani,  P. M., 1998, “An Infrared Thermography Imaging System For Convective Heat Transfer Measurements in Complex Flows,” Meas. Sci. Technol., 9(12), pp. 1974–1981.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, pp. 3–8.
Moffat,  R. J., 1988, “Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1(1), pp. 3–17.
Lienhard, J. H., 1987, A Heat Transfer Textbook, Second Edition, Prentice-Hall Inc., Englewood Cliffs, NJ.
Gee,  D. L., and Webb,  R. L., 1980, “Forced Convection Heat Transfer in Helically Rib-Roughened Tubes,” Int. J. Heat Mass Transfer, 23, pp. 1127–1136.

Figures

Grahic Jump Location
Schematic diagrams of (a) the experimental apparatus used for heat transfer measurements, and (b) the rib turbulator test surfaces, including coordinate system
Grahic Jump Location
Local Nusselt number ratio Nu/Nuo distribution along the rib turbulator test surface for ReH=17,000 and Toi/Tw=0.94. (a) With constant surface heat flux and no surface conduction analysis applied. (b) With variable surface heat flux and surface conduction analysis applied.
Grahic Jump Location
Variable surface heat flux, local Nusselt number ratios Nu/Nuo along the rib turbulator test surface for a Reynolds number ReH=17,000 and Toi/Tw of 0.94. Data are given for constant surface heat flux (no surface conduction analysis) and for variable surface heat flux (with surface conduction analysis). (a) At constant Z/Dh=0.0 as X/Dh varies. (b) At constant X/Dh=7.0 as Z/Dh varies.
Grahic Jump Location
Variable surface heat flux, local Nusselt number ratios Nu/Nuo along the rib turbulator test surface for different Reynolds numbers ReH and Toi/Tw of 0.93–0.95. (a) At constant Z/Dh=0.0 as X/Dh varies. (b) At constant X/Dh=7.0 as Z/Dh varies.
Grahic Jump Location
(a) Schematic diagram of a portion of the bottom rib turbulator test surface showing the coordinates which are oriented perpendicular to and parallel to the rib turbulators. (b) (c) Nusselt number ratios N̄u/Nuo, obtained with variable surface heat flux, for fully-developed conditions measured at the downstream end of the test section for different Reynolds numbers and Toi/Tw=0.93–0.95. (b) Data averaged in the L/Dh direction, as dependent upon the W/Dh/(W/Dh)max coordinate. (c) Data averaged in the W/Dh direction, as dependent upon the L/Dh/(L/Dh)max coordinate.
Grahic Jump Location
Nusselt number ratios N̄u/Nuo for fully-developed conditions measured at the downstream end of the test section for a Reynolds number number ReH=17,000 and Toi/Tw of 0.94. Data are shown with and without conduction analysis applied (variable and constant surface heat flux, respectively). (a) Data averaged in the L/Dh direction, as dependent upon the W/Dh/(W/Dh)max coordinate. (b) Data averaged in the W/Dh direction, as dependent upon the L/Dh(L/Dh)max coordinate.
Grahic Jump Location
Nusselt number ratios N̄u/Nuo, obtained with variable surface heat flux, for a Reynolds number number ReH=51,000 and Toi/Tw of 0.94. Data are shown which are measured at the downstream end of the test section with thermally fully-developed flow, and measured at the upstream end of the test section with thermally developing flow. (a) Data averaged in the L/Dh direction, as dependent upon the W/Dh/(W/Dh)max coordinate. (b) Data averaged in the W/Dh direction, as dependent upon the L/Dh/(L/Dh)max coordinate.
Grahic Jump Location
Parallel-rib-turbulator channel globally averaged Nusselt number ratios for fully developed flow, averaged over the surface area corresponding to one period of rib turbulator geometry, as dependent upon Reynolds number for Toi/Tw=0.93–0.95. Comparisons with results from other investigations 567 are included.
Grahic Jump Location
Rib turbulator channel friction factor ratios f/fo for fully developed flow conditions as dependent upon Reynolds number for Toi/Tw=0.93–0.95. Symbols are defined in Fig. 8. Comparisons with results from other investigations 567 are included.
Grahic Jump Location
Rib turbulator channel globally-averaged Nusselt numbers for fully developed flow and Toi/Tw=0.93–0.95 as dependent upon friction factor ratios, including comparisons with results from other investigations 567. Symbols are defined in Fig. 8.
Grahic Jump Location
Rib turbulator channel globally averaged performance parameters for fully developed flow and Toi/Tw=0.93–0.95 as dependent upon Reynolds number, including comparisons with results from other investigations 567. Symbols defined in Fig. 8.

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In