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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Modeling of Heat Transfer in a Mist/Steam Impinging Jet

[+] Author and Article Information
X. Li

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921e-mail: xianchl@clemson.edu

J. L. Gaddis

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921e-mail: leo.gaddis@ces.clemson.edu

T. Wang

Energy Conversion and Conservation Center, University of New Orleans, New Orleans, Louisiana 70148-2220e-mail: twang@uno.edu

J. Heat Transfer 123(6), 1086-1092 (Apr 23, 2001) (7 pages) doi:10.1115/1.1409262 History: Received June 07, 2000; Revised April 23, 2001
Copyright © 2001 by ASME
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References

Goodyer, M. J., and Waterston, R. M., 1973, “Mist-Cooled Turbines,” Conf. of Heat and Fluid Flow in Steam and Gas Turbine Plant, Proc. of Institution of Mechanical Engineers, pp. 166–174.
Guo,  T., Wang,  T., and Gaddis,  J. L., 2000, “Mist/Steam Cooling in a Heated Horizontal Tube Part I: Experimental System and Part II: Results and Modeling,” ASME J. Turbomach., 122, pp. 360–374.
Guo,  T., Wang,  T., and Gaddis,  J. L., 2000, “Mist/Steam Cooling in a 180-Degree Tube,” ASME J. Heat Transfer, 122, No. 4, pp. 749–756.
Takagi, T., and Ogasawara, M., 1974, “Some Characteristics of Heat and Mass Transfer in Binary Mist Flow,” Proc. of 5th Int. Heat Transfer Conf., Tokyo, Japan Society of Mechanical Engineers, pp. 350–354.
Mastanaiah,  K., and Ganic,  E. N., 1981, “Heat Transfer in Two-Component Dispersed Flow,” ASME J. Heat Transfer, 103, pp. 300–306.
Yoshida, H., Suenaga, K., and Echigo, R., 1988, “Turbulence Structure and Heat Transfer of A Two-Dimensional Impinging Jet with Gas-Solid Suspensions,” NHTC, 2 , pp. 461–467.
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., 2, pp. 1231–1238.
Pederson,  C. O., 1970, “An Experimental Study of the Dynamic Behavior and Heat Transfer Characteristics of Water Droplet Impinging upon a Heated Surface,” Int. J. Heat Mass Transf., 13, pp. 369–381.
Chandra,  S., and Avedisian,  C. T., 1992, “Observations of Droplet Impingement on a Ceramic Porous Surface,” Int. J. Heat Mass Transf., 35, No. 10, pp. 2377–2388.
Chandra,  S., and Avedisian,  C. T., 1991, “On the Collision of a Droplet With a Solid Surface,” Proc. R. Soc. London, Ser. A, 432, pp. 13–41.
Buyevich,  Yu. A., and Mankevich,  V. N., 1995, “Interaction of Dilute Mist Flow with a Hot Body,” Int. J. Heat Mass Transf., 38, pp. 731–744.
Buyevich,  Yu. A., and Mankevich,  V. N., 1996, “Cooling of a Superheated Surface with a Jet Mist Flow,” Int. J. Heat Mass Transf., 39, pp. 2353–2362.
Fujimoto,  H., and Hatta,  N., 1996, “Deformation and Rebounding Processes of a Water Droplet Impinging on a Flat Surface above Leidenfrost Temperature,” ASME J. Fluids Eng., 118, pp. 142–149.
Hatta,  N., Fujimoto,  H., Kinoshita,  K., and Takuda,  H., 1997, “Experimental Study of Deformation Mechanism of a Water Droplet Impinging on Hot Metallic Surfaces above Leidenfrost Temperature,” ASME J. Fluids Eng., 119, pp. 692–199.
Li,  X., Gaddis,  J. L., and Wang,  T., 2001, “Mist/Steam Heat Transfer in Confined Slot Jet Impingement,” ASME J. Turbomach., 123, No. 1, pp. 161–167.
Ganic,  E. N., and Rosenhow,  W. M., 1977, “Dispersed Flow Heat Transfer,” Int. J. Heat Mass Transf., 20, pp. 885–866.
Fluent, 1997, FLUENT 4.4 User’s Guide, I–III, Fluent Inc.
Li, X., 1999, “Cooling by a Mist/Steam Jet,” Ph.D. dissertation, Dept. of Mechanical Engineering, Clemson University, SC.
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Figures

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Schematic diagram of test section
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A typical heat transfer result of mist/steam jet impingement (q=7.54 kW/m2,Re=14000, and ml/ms=∼1.5 percent)
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Modeling of heat transfer from wall to droplet
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Heat transfer process between droplet and wall by direct conduction (Q is the heat conduction from the target wall to the droplet): (a) total wall heat; and (b) superheat of droplet.
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Droplet distribution and number at jet exit and on target wall: (a) at jet exit; and (b) impacting on target wall (x/b<1).
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Predicted effect of the wall temperature on mist/steam heat transfer at different mist concentrations and droplet impact velocities
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Comparison of the predicted result by the model and experimental data
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Predicted effect of the mist concentration on mist/steam heat transfer at different wall temperatures and droplet diameter

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