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TECHNICAL PAPERS: Jets, Wakes, and Impingement Cooling

Mist/Steam Heat Transfer With Jet Impingement Onto a Concave Surface

[+] Author and Article Information
Xianchang Li, Ting Wang

Energy Conversion and Conservation Center, University of New Orleans, New Orleans, LA 70148-2220

J. Leo Gaddis

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921

J. Heat Transfer 125(3), 438-446 (May 20, 2003) (9 pages) doi:10.1115/1.1561813 History: Received May 28, 2002; Revised November 12, 2002; Online May 20, 2003
Copyright © 2003 by ASME
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References

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Guo,  T., Wang,  T., and Gaddis,  J. L., 2000, “Mist/Steam Cooling in a Heated Horizontal Tube, Part 1: Development of the Experimental Program,” ASME J. Turbomach., 122, pp. 360–365.
Li,  X., Gaddis,  J. L., and Wang,  T., 2001, “Modeling of Heat Transfer in a Mist/Steam Impingement Jet,” ASME J. Heat Transfer, 124, pp. 1086–1092.
Wachters,  L. H. J., Smulders,  L., Vermeulen,  J. R., and Kleiweg,  H. C., 1966, “The Heat Transfer from A Hot Wall to Impinging Mist Droplets in The Spheroidal State,” Chem. Eng. Sci., 21, pp. 1231–1238.
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Guo,  T., Wang,  T., and Gaddis,  J. L., 2000, “Mist/Steam Cooling in a Heated Horizontal Tube, Part 2: Results and Modeling,” ASME J. Turbomach., 122, pp. 366–374.
Guo,  T., Wang,  T., and Gaddis,  J. L., 2001, “Mist/Steam Cooling in a 180° Tube Bend,” ASME J. Heat Transfer, 122, pp. 749–756.
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Figures

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Schematic diagram of experimental system
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Details of test section
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Heat transfer results at Re=7500 with q=3350 W/m2 and ml/ms=∼0.5 %: (a) wall temperature; (b) heat transfer coefficient; and (c) ratio of heat transfer coefficient.
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Heat transfer results at Re=7500 with q=7540 W/m2 and ml/ms=∼0.5 %: (a) wall temperature; (b) heat transfer coefficient; and (c) ratio of heat transfer coefficient.
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Heat transfer results at Re=7500 with q=13400 W/m2 and ml/ms=∼0.5 %: (a) wall temperature; (b) heat transfer coefficient; and (c) ratio of heat transfer coefficient.
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Heat transfer results at Re=15,000 with q=7540 W/m2 and ml/ms=∼0.5 %: (a) wall temperature; (b) heat transfer coefficient; and (c) ratio of heat transfer coefficient.
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Heat transfer results at Re=15,000 with q=13400 W/m2 and ml/ms=∼0.5 %: (a) wall temperature; (b) heat transfer coefficient; and (c) ratio of heat transfer coefficient.
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Heat transfer results at Re=15,000 with q=20900 W/m2 and ml/ms=∼0.5 %: (a) wall temperature; (b) heat transfer coefficient; and (c) ratio of heat transfer coefficient.
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Heat transfer results for Re=22,500 at various heat fluxes
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Comparison of steam alone stagnation heat transfer on concaved surface with flat plate correlation. Two heat fluxes are applied for each Reynolds number.
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Comparison of heat transfer enhancement for flat and concave target surfaces at Re=7500 (ml/ms=1.5 % for flat case and ml/ms=0.5 % for curved case). The enhancement is normalized by the value at the stagnation point.
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Comparison of heat transfer enhancement for flat and concave target surfaces at Re=22,500 (ml/ms=1.5 % for flat case and ml/ms=0.5 % for curved case). The enhancement is normalized by the value at the stagnation point.
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Heat transfer results for mist/steam slot jet impingement on a flat surface (Re=7500 and ml/ms=∼3.5 %)
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Heat transfer results for mist/steam slot jet impingement on a flat surface at (Re=14,000 and ml/ms=∼1.5 %)
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Heat transfer results in Nusselt number over a concave surface

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