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TECHNICAL PAPERS

Influence of Crossflow-Induced Swirl and Impingement on Heat Transfer in a Two-Pass Channel Connected by Two Rows of Holes

[+] Author and Article Information
Gautam Pamula, Srinath V. Ekkad, Sumanta Acharya

Mechanical Engineering Department, Louisiana State University, Baton Rouge, LA 70803

J. Turbomach 123(2), 281-287 (Feb 01, 2000) (7 pages) doi:10.1115/1.1343467 History: Received February 01, 2000
Copyright © 2001 by ASME
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References

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Abuaf, N., Gibbs, R., and Baum, R., 1986, “Pressure Drop and Heat Transfer Coefficient Distributions in Serpentine Passages With and Without Turbulence Promoters,” Proc. 8th International Heat Transfer Conference, pp. 2837–2845.
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Chyu,  M. K., 1991, “Regional Heat Transfer in Two-Pass and Three-Pass Passages With 180-deg Sharp Turns,” ASME J. Heat Transfer, 113, pp. 63–70.
Ekkad,  S. V., and Han,  J. C., 1995, “Local Heat Transfer Distributions Near a Sharp 180° Turn of a Two-Pass Square Channel Using a Transient Liquid Crystal Image Technique,” J. Flow Visualization Image Processing, 2, No. 3, pp. 287–298.
Han,  J. C., Chandra,  P. R., and Lau,  S. C., 1988, “Local Heat/Mass Transfer Distributions Around Sharp 180 deg Turns in Two-Pass Smooth and Rib-Roughened Channels,” ASME J. Heat Transfer, 110, pp. 91–98.
Chandra,  P. R., Han,  J. C., and Lau,  S. C., 1988, “Effect of Rib Angle on Local Heat/Mass Transfer Distribution in a Two-Pass Rib-Roughened Channel,” ASME J. Turbomach., 110, pp. 70–79.
Ekkad,  S. V., and Han,  J. C., 1997, “Detailed Heat Transfer Distributions in Two-Pass Square Channels With Rib Turbulators,” Int. J. Heat Mass Transf., 40, No. 11, pp. 2525–2537.
Hibbs,  R., Acharya,  S., Chen,  Y., Nikitopoulos,  D., and Myrum,  T., 1998, “Heat Transfer in a Two-Pass Internally Ribbed Turbine Blade Coolant Channel With Cylindrical Vortex Generators,” ASME J. Turbomach., 120, pp. 724–734.
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Hedlund,  C. R., Ligrani,  P. M., Moon,  H. K., and Glezer,  B., 1999, “Heat Transfer and Flow Phenomena in a Swirl Chamber Simulating Turbine Blade Internal Cooling,” ASME J. Turbomach., 121, pp. 804–813.
Ekkad,  S. V., Pamula,  G., and Acharya,  S., 1999, “Influence of Cross-Flow Induced Swirl and Impingement on Heat Transfer in an Internal Coolant Passage of a Turbine Airfoil,” in: Heat Transfer in Gas Turbines, ASME HTD-Vol. 364-1; ASME J. Heat Transfer, 122, pp. 587–597.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, Jan., pp. 3–8.
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Figures

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Schematic of the test sections with proposed divider wall geometries
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Schematic of the test section cross section
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Smoke flow visualization of the flow inside the channels
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Detailed Nu/Nu0 distributions for the tested geometry
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Effect of channel Reynolds number on spanwise averaged Nusselt number ratio distributions
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Effect of divider wall geometry on spanwise averaged Nusselt number distributions
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Comparison of different cases from present study with cases studied by Ekkad et al. 15
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Comparison of second pass overall averaged Nusselt number ratios to published rib turbulator studies
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Overall averaged Nusselt number ratio versus friction factor ratio for all six channels
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Thermal Performance Parameter (TPP) versus channel Reynolds number for all six channels

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