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TECHNICAL PAPERS: Forced Convection

Heat Transfer in Rotating Rectangular Cooling Channels (AR=4) With Angled Ribs

[+] Author and Article Information
Todd S. Griffith, Luai Al-Hadhrami, Je-Chin Han

Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

J. Heat Transfer 124(4), 617-625 (Jul 16, 2002) (9 pages) doi:10.1115/1.1471525 History: Received August 14, 2001; Revised February 14, 2002; Online July 16, 2002
Copyright © 2002 by ASME
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References

Han,  J. C., and Park,  J. S., 1988, “Developing Heat Transfer in Rectangular Channel With Rib Turbulators,” Int. J. Heat Mass Transf., 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.
Wagner,  J. H., Johnson,  B. V., and Hajek,  T. J., 1991, “Heat Transfer in Rotating Passage With Smooth Walls and Radial Outward Flow,” ASME J. Turbomach., 113, pp. 42–51.
Wagner,  J. H., Johnson,  B. V., and Kooper,  F. C., 1991, “Heat Transfer in Rotating Serpentine Passage With Smooth Walls,” ASME J. Turbomach., 113(3), pp. 321–330.
Parsons,  J. A., Han,  J. C., and Zhang,  Y. M., 1995, “Effects of Model Orientation and Wall Heating Condition on Local Heat Transfer in a Rotating Two-Pass Square Channel With Rib Turbulators,” Int. J. Heat Mass Transf., 38(7), pp. 1151–1159.
Johnson,  B. V., Wagner,  J. H., Steuber,  G. D., and Yeh,  F. C., 1994, “Heat Transfer in Rotating Serpentine Passage With Selected Model Orientations for Smooth or Skewed Trip Walls,” ASME J. Turbomach., 116, pp. 738–744.
Dutta,  S., and Han,  J. C., 1996, “Local Heat Transfer in Rotating Smooth and Ribbed Two-Pass Square Channels with Three Channel Orientations,” ASME J. Heat Transfer, 118, pp. 578–584.
Al-Qahtani, M., Jang, Y., Chen, H. C., and Han, J. C., 2001, “Prediction of Flow and Heat Transfer in Rotating Two-Pass Rectangular Channels with 45 deg Rib Turbulators,” ASME Paper No. 2001-GT-0187.
Taslim,  M. E., Rahman,  A., and Spring,  S. D., 1991, “An Experimental Investigation of Heat Transfer Coefficients in a Spanwise Rotating Channel With Two Opposite Rib-Roughened Walls,” ASME J. Turbomach., 113, pp. 75–82.
Taslim,  M. E., Bondi,  L. A., and Kercher,  D. M., 1991, “An Experimental Investigation of Heat Transfer in an Orthogonally Rotating Channel Roughened With 45 deg Criss-Cross Ribs on Two Opposite Walls,” ASME J. Turbomach., 113, pp. 346–353.
Willett, F. T., and Bergles, A. E., 2000, “Heat Transfer in Rotating Narrow Rectangular Ducts with Heated Sides Oriented at 60 deg to the R-Z Plane,” ASME Paper No. 2000-GT-224.
Han, J. C., Dutta, S., and Ekkad, S. V., 2000, Gas Turbine Heat Transfer and Cooling Technology, Taylor and Francis, New York.
Han,  J. C., and Dutta,  S., 2001, “Recent Developments in Turbine Blade Internal Cooling,” in Heat Transfer in Gas Turbine Systems, R. J. Goldstein, ed., Ann. N.Y. Acad. Sci., 934, pp. 162–178.
Dutta,  S., and Han,  J. C., 1998, “Rotational Effects on the Turbine Blade Coolant Passage Heat Transfer,” Annu. Rev. Heat Transfer, 9, pp. 268–314.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, pp. 3–8.
Azad, G. S., Uddin, J. M., Han, J. C., Moon, H. K., and Glezer, B., 2001, “Heat Transfer in a Two-Pass Rectangular Rotating Channel with 45 deg Angled Rib Turbulators,” ASME Paper No. 2001-GT-0186.

Figures

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Sketch illustrating orientation of a 4:1 aspect ratio channel in a gas turbine blade
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Schematic of experimental rotating test rig
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Schematic of 4:1 test section
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Outward flow rectangular test section with: (a) smooth walls; and (b) 45 deg parallel ribs on leading and trailing surfaces.
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Nusselt number ratio for stationary smooth case
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Nusselt number ratio for rotation smooth case with β=90 deg
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Nusselt number ratio for rotation smooth case with β=135 deg
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Nusselt number ratio for stationary ribbed case
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Nusselt number ratio for rotation ribbed case with β=90 deg
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Nusselt number ratio for rotation ribbed case with β=135 deg
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Streamwise averaged Nusselt number ratio for smooth channel
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Streamwise averaged Nusselt number ratio for ribbed channel

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