The addition of mist to a flow of steam or gas offers enhanced cooling for many applications, including cooling of gas turbine blades. The enhancement mechanisms include effects of mixing of mist with the gas phase and effects of evaporation of the droplets. An impinging mist flow is attractive for study because the impact velocity is relatively high and predictable. Water droplets, less than 15 μm diameter and at concentrations below 10 percent, are considered. The heat transfer is assumed to be the superposition of three components: heat flow to the steam, heat flow to the dispersed mist, and heat flow to the impinging droplets. The latter is modeled as heat flow to a spherical cap for a time dependent on the droplet size, surface tension, impact velocity and surface temperature. The model is used to interpret experimental results for steam invested with water mist in a confined slot jet. The model results follow the experimental data closely.
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Modeling of Heat Transfer in a Mist/Steam Impinging Jet
X. Li, Research Assistant,
X. Li, Research Assistant
Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921
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J. L. Gaddis, Professor Mem. ASME,
J. L. Gaddis, Professor Mem. ASME
Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921
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T. Wang, Professor Mem. ASME
T. Wang, Professor Mem. ASME
Energy Conversion and Conservation Center, University of New Orleans, New Orleans, Louisiana 70148-2220
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X. Li, Research Assistant
Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921
J. L. Gaddis, Professor Mem. ASME
Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921
T. Wang, Professor Mem. ASME
Energy Conversion and Conservation Center, University of New Orleans, New Orleans, Louisiana 70148-2220
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division June 7, 2000; revision received April 23, 2001. Associate Editor: V. P. Carey.
J. Heat Transfer. Dec 2001, 123(6): 1086-1092 (7 pages)
Published Online: April 23, 2001
Article history
Received:
June 7, 2000
Revised:
April 23, 2001
Citation
Li, X., Gaddis, J. L., and Wang, T. (April 23, 2001). "Modeling of Heat Transfer in a Mist/Steam Impinging Jet ." ASME. J. Heat Transfer. December 2001; 123(6): 1086–1092. https://doi.org/10.1115/1.1409262
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