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TECHNICAL PAPERS

Lateral-Flow Effect on Endwall Heat Transfer and Pressure Drop in a Pin-Fin Trapezoidal Duct of Various Pin Shapes

[+] Author and Article Information
Jenn-Jiang Hwang, Chau-Ching Lu

Department of Mechanical Engineering, Chung-Hua University, Hsinchu, Taiwan 300

J. Turbomach 123(1), 133-139 (Feb 01, 2000) (7 pages) doi:10.1115/1.1333093 History: Received February 01, 2000
Copyright © 2001 by ASME
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References

Hwang,  J. J., Lai,  D. Y., and Tsia,  Y. R., 1999, “Heat Transfer and Pressure Drop in Pin-Fin Trapezoidal Ducts,” ASME J. Turbomach., 121, pp. 264–272.
Van Fossen,  G. J., 1982, “Heat-Transfer Coefficients for Staggered Arrays of Short Pin Fins,” ASME J. Heat Transfer, 104, pp. 268–274.
Brigham,  B. A., and Van Fossen,  G. J., 1984, “Length to Diameter Ratio and Row Number Effects in Short Pin Fin Heat Transfer,” ASME J. Eng. Gas Turbines Power, 106, pp. 241–245.
Metzger,  D. E., Berry,  R. A., and Bronson,  J. E., 1982, “Developing Heat Transfer in Rectangular Ducts With Staggered Pin Fins,” ASME J. Heat Transfer, 104, pp. 700–706.
Metzger,  D. E., Fan,  C. S., and Haley,  S. W., 1984, “Effects of Pin Shape and Array Orientation on Heat Transfer and Pressure Loss in Pin Fin Arrays,” ASME J. Heat Transfer, 106, pp. 252–257.
Lau,  S. C., Han,  J. C., and Kim,  Y. S., 1989, “Turbulent Heat Transfer and Friction in Pin Fin Channels With Lateral Flow Injection,” ASME J. Heat Transfer, 111, pp. 51–58.
Chyu,  M. K., 1990, “Heat Transfer and Pressure Drop for Short Pin-Fin Arrays With Pin-Endwall Fillet,” ASME J. Heat Transfer, 112, pp. 926–932.
Chyu,  M. K., Hsing,  Y. C., and Natarajan,  V., 1998, “Convective Heat Transfer of Cubic Fin Arrays in a Narrow Channel,” ASME J. Turbomach., 120, pp. 362–367.
Chyu,  M. K., Hsing,  Y. C., Shih,  T. I. P., and Natarajan,  V., 1999, “Heat Transfer Contributions of Pins and Endwall in Pin-Fin Arrays: Effects of Thermal Boundary Condition Modeling,” ASME J. Turbomach., 121, pp. 257–263.
Hwang,  J. J., and Chen,  C. S., 1999, “Augmented Heat Transfer in a Triangular Duct by Using Multiple Swirling Jets,” ASME J. Heat Transfer, 121, pp. 683–690.
Lu, C. C., 1999, “An Experimental Study of Heat Transfer and Fluid Flow in a Pin-Fin Wedge Duct,” Masters Thesis, Chung-Hua University, Taiwan.
Ireland,  P. T., and Jones,  T. V., 1987, “The Response Time of a Surface Thermometer Employing Encapsulated Thermochromic Liquid Crystals,” J. Phys. E, 20, pp. 1195–1199.
Vedula, R. J., and Metzger, D. E., 1991, “A Method for the Simultaneous Determination of Local Effectiveness and Heat Transfer Distributions in Three-Temperature Convection Situation,” ASME Paper No. 91-GT-345.
Kline,  S. J., and McClintock,  E. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, pp. 3–8.
Dittus, F. W., and Boelter, L. M. K., 1930, University of California at Berkeley, Publications in Engineering, 2 , p. 443.
Petukhov, B. S., 1970, Advances in Heat Transfer, Vol. 6, Academic, New York, pp. 503–504.

Figures

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Typical modern internally cooled turbine blade and the modeled pin-fin trapezoidal duct
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Sketch of the experimental apparatus
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Dimensions and coordinate system of the test section
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Comparison of the averaged Nusselt number and friction factor of the present smooth trapezoidal duct with the previous correlations
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Detailed heat transfer coefficient distribution on the endwall of the trapezoidal duct: effect of the lateral-flow rate, Re=40,000
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Detailed heat transfer coefficient distribution on the endwall of the trapezoidal duct: effect of the pin shapes, Re=40,000
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Relation of the lateral-flow rate and the main flow direction in the trapezoidal duct
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Effect of the lateral-flow rate on the endwall averaged Nusselt number for Re=40,000
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Endwall-averaged Nusselt number as a function of the Reynolds number
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Reynolds-number dependence of Euler number for the trapezoidal duct of the square pins

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