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RESEARCH PAPERS: Forced Convection

The Effect of Support Grid Design on Azimuthal Variation in Heat Transfer Coefficient for Rod Bundles

[+] Author and Article Information
Mary V. Holloway, Timothy A. Conover, Heather L. McClusky, Donald E. Beasley

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634

Michael E. Conner

Westinghouse Nuclear Fuel, 5801 Bluff Rd., Columbia, SC 29250

J. Heat Transfer 127(6), 598-605 (Jun 06, 2005) (8 pages) doi:10.1115/1.1863274 History: Received January 06, 2004; Revised December 16, 2004; Online June 06, 2005
Copyright © 2005 by ASME
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References

Dingee, D. A., and Chastain, J. W., 1956, “Heat Transfer from Parallel Rods in Axial Flow,” Reactor Heat Transfer Conference of 1956, TID-7529 (Pt. 1), Book 2, pp. 462–501.
Kidd, G. J., Hoffman, H. W., and Stelzman, W. J., 1968, “The Temperature Structure and Heat Transfer Characteristics of an Electrically Heated Model of a Seven-Rod Cluster Fuel Element,” ASME paper 68-WA/HT-33.
Marek, J., and Rehme, K., 1979, “Heat Transfer in Smooth and Roughened Rod Bundles Near Spacer Grids,” Proceedings of the ASME Winter Annual Meeting Dec 2–7, 1979, pp. 163–170.
Guellouz,  M. S., and Tavoularis,  S., 1992, “Heat Transfer in Rod Bundle Subchannels with Varying Rod-Wall Proximity,” Nucl. Eng. Des., 132, pp. 351–366.
de Crecy,  F., 1994, “The Effect of Grid Assembly Mixing Vanes on Critical Heat Flux Values and Azimuthal Location in Fuel Assemblies,” Nucl. Eng. Des., 149, pp. 233–241.
Yao,  S. C., Hochreiter,  L. E., and Leech,  W. J., 1982, “Heat-Transfer Augmentation in Rod Bundles Near Grid Spacers,” J. Heat Transfer, 104, pp. 76–81.
Kreith,  F., and Sonju,  O. K., 1965, “The Decay of a Turbulent Swirl in a Pipe,” J. Fluid Mech., 22, Part 2, pp. 257–271.
Holloway,  M. V., McClusky,  H. L., Beasley,  D. E., and Conner,  M. E., 2003, “The Effect of Support Grid Features on Local, Single-Phase Heat Transfer Measurements in Rod Bundles,” J. Heat Transfer, 126, pp. 43–53.
Rehme,  K., 1992, “The Structure of Turbulence in Rod Bundles and the Implications on Natural Mixing Between the Subchannels,” J. Heat Transfer, 35, pp. 567–581.
Hooper,  J. D., and Rehme,  K., 1984, “Large-scale Structural Effects in Developed Turbulent Flow Through Closely-Spaced Rod Arrays,” J. Fluid Mech., 145, pp. 305–337.
Moller,  S. V., 1991, “On Phenomena of Turbulent Flow Through Rod Bundles,” Exp. Therm. Fluid Sci., 4, pp. 25–35.
Wu,  X., and Trupp,  A. C., 1993, “Experimental Study on the Unusual Turbulence Intensity Distributions in Rod-to-Wall Gap Regions,” Exp. Therm. Fluid Sci., 6, pp. 360–370.
Guellouz,  M. S., and Tavoularis,  S., 2000, “The Structure of Turbulent Flow in a Rectangular Channel Containing a Cylindrical Rod-Part 1: Phase-averaged Measurements,” Exp. Therm. Fluid Sci., 23, 59–73.
Guellouz,  M. S., and Tavoularis,  S., 2000, “The Structure of Turbulent Flow in a Rectangular Channel Containing a Cylindrical Rod-Part 2: Reynolds-averaged Measurements,” Exp. Therm. Fluid Sci., 23, 75–91.
Krauss,  T., and Meyer,  L., 1996, “Characteristics of Turbulent Velocity and Temperature in a Wall Channel of a Heated Rod Bundle,” Exp. Therm. Fluid Sci., 12, pp. 75–86.
McClusky,  H. L., Holloway,  M. V., Beasley,  D. E., and Conner,  M. E., 2002, “Development of Swirling Flow in a Rod Bundle Subchannel,” J. Fluids Eng., 124, pp. 747–755.
McClusky,  H. L., Holloway,  M. V., Conover,  T. A., Beasley,  D. E., Conner,  M. E., and Smith,  D. L., 2003, “Mapping of the Lateral Flow Field in Typical Subchannels of a Support Grid with Vanes,” J. Fluids Eng., 125, pp. 987–996.
Dhir,  V. K., and Chang,  F., 1992, “Heat Transfer Enhancement Using Tangential Injection,” ASHRAE Trans., 98, pp. 383–390.
Beasley,  D. E., and Figliola,  R. S., 1988, “A Generalized Analysis of a Local Heat Flux Probe,” J. Phys. E, 21, pp. 316–322.
Hay,  N., and West,  P. D., 1975, “Heat Transfer in Free Swirling Flow in a Pipe,” J. Heat Transfer, 97, Series C, No. 3, pp. 411–416.
Yang,  S. K., and Chung,  M. K., 1998, “Turbulent Flow Through Spacer Grids in Rod Bundles,” J. Fluids Eng., 120, pp. 786–791.
Conner, M. E., Smith, L. D. III., Paramonov, D. V., Liu, B., and Dzodzo, M., 2003, “Understanding and Predicting the Flow Field in a Reactor Core,” Proceedings of the ENS TopFuel 2003/ANS LWR Fuel Performance Meeting, 2003 Topfuel conference, INFORUM GmbH, March 16–19, Wurzburg, Germany.

Figures

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(a) Schematic diagram of 5×5 rod bundle assembly (b) Details of subchannel with split-vane pair
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Representative drawings of support grid designs for (a) standard grid, (b) disc grid, and (c) split-vane pair grid.
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Drawing of experimental facility
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Drawing of thin film azimuthal heat transfer sensor (Dimensions in mm)
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Photograph of thin film azimuthal heat transfer sensor
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Details of instrumented rod location
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Azimuthal variations in Nusselt number comparison with Kidd et al. 2
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Azimuthal variations in Nusselt number for standard grid
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Azimuthal variations in Nusselt number for disc grid
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Lateral velocity and axial vorticity downstream of split-vane pair grid 17 for (a) 2.8 Dh and (b) 6.3 Dh
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Azimuthal variations in Nusselt number for split-vane pair grid
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Azimuthal variations in Nusselt number for 2.2 Dh
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Azimuthal variations in Nusselt number for 36.7 Dh
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(Color) Contour plots of temperature difference (T−Tb) at Re=28,000 for (a) standard grid, (b) disc grid, and (c) split-vane pair grid
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(Color) Temperature distribution for split-vane pair grid obtained from CFD 22

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