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TECHNICAL PAPERS

The Measurement of Local Wall Heat Transfer in Stationary U-Ducts of Strong Curvature, With Smooth and Rib-Roughened Walls

[+] Author and Article Information
Hector Iacovides, David C. Jackson, George Kelemenis, Brian E. Launder

UMIST, Department of Mechanical Engineering, Manchester, M60 1QD, United Kingdom

J. Turbomach 122(2), 386-392 (Feb 01, 1999) (7 pages) doi:10.1115/1.555459 History: Received February 01, 1999
Copyright © 2000 by ASME
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References

Han,  J. C., 1984, “Heat Transfer and Friction in Channels With Two Opposite, Rib-Roughened Walls,” ASME J. Heat Transfer, 106, pp. 774–781.
Han,  J. C., 1988, “Heat Transfer and Friction Characteristics in Rectangular Channels With Rib Turbulators,” ASME J. Heat Transfer, 110, pp. 321–328.
Lau,  S. C., McMillin,  R. D., and Han,  J. C., 1991, “Turbulent Heat Transfer and Friction in a Square Channel With Discrete Rib Turbulators,” ASME J. Turbomach., 113, pp. 360–366.
Lau,  S. C., Kukreja,  R. T., and McMillin,  R. D., 1992, “Turbulent Heat Transfer in a Square Channel With Staggered Discrete Ribs,” AIAA J. Thermophys.,6, No. 1, pp. 171–173.
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.
Rau,  I., Cakan,  M., Moeller,  D., and Arts,  T., 1998, “The Effect of Periodic Ribs on Local Aerodynamic and Heat Transfer Performance of a Straight Cooling Channel,” ASME J. Turbomach., 120, pp. 368–375.
Iacovides, H., Jackson, D. C., Kelemenis, G., Launder, B. E., and Yuan, Y.-M., 1998, “Recent Progress in the Experimental Investigation of Flow and Local Wall Heat Transfer in Internal Cooling Passages of Gas-Turbine Blades,” Proceedings of the 2nd EF Conference on Turbulent Heat Transfer, pp 7.14–7.28, Manchester, UK.
Cheah,  S. C., Iacovides,  H., Jackson,  D. C., Ji,  H. H., and Launder,  B. E., 1996, “LDA Investigation of the Flow Development Through Rotating U -Ducts,” ASME J. Turbomach., 118, pp. 590–596.
Iacovides,  H., Jackson,  D. C., Ji,  H., Kelemenis,  G., Launder,  B. E., and Nikas,  K., 1998, “LDA Study of the Flow Development Through an Orthogonally Rotating U -Bend of Strong Curvature and Rib-Roughened Walls,” ASME J. Turbomach., 120, pp. 366–391.
Iacovides,  H., Jackson,  D. C., Launder,  B. E., and Yuan,  Y. M., 1999, “An Experimental Study of a Rib Roughened Rotating U -Bend Flow,” J. Eng. Thermal Fluid Sci., 19, pp. 151–159.
Baughn J. W., and Yan, X., 1992, “Local Heat Transfer Measurements in Square Ducts With Transverse Ribs,” Enhanced Heat Transfer, ASME HTD-Vol. 202, pp. 1–7.
Jones, T. V., Wang Z., and Ireland, P. T., 1992, “Liquid Crystal Techniques,” presented at the International Symposium on Heat Transfer in Turbomachinery (ICHMT), Athens, Greece.
Cooper,  T. E., Field,  R. J., and Meyer,  J. F., 1975, “Liquid Crystal Thermography and Its Application to the Study of Convective Heat Transfer,” ASME J. Heat Transfer, 97, pp. 442–450.
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Kline, A. B., and McClintock, C. D., 1953, “Calculating Uncertainty in Single-Sample Experiments,” Mechanical Engineering, Jan., pp. 3–8.

Figures

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LDA measurements for case I 8
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LDA measurements along the duct symmetry plane for cases II and III 910
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Heating and viewing arrangements
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Nusselt number contours for the smooth U-bend, case I; Re=95,000 and Pr=0.71
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Nusselt number contours for the ribbed U-bend, case II; Re=95,000 and Pr=0.71
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Axial variation of side-averaged Nusselt number of smooth and a rib-roughened U-bend, cases I and II;   : smooth duct; —— ribbed duct
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Nusselt number contours for the ribbed U-bend, case III; Re=95,000 and Pr=0.71
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Axial variation of side-averaged Nusselt number of a smooth and a rib-roughened U-bend, cases I and III;   : smooth duct; —— ribbed duct

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