Effect of Slip Velocity and Heat Transfer on the Condensed Phase Momentum Flux of Supersonic Nozzle Flows

Author:

Sherif S. A.,Lear W. E.1,Winowich N. S.2

Affiliation:

1. Department of Mechanical Engineering, 237 MEB, Box 116300, University of Florida, Gainesville, FL 32611-6300

2. Department of Mechanical and Aerospace Engineering and Engineering Science, University of Tennessee–Knoxville, 414 Dougherty Engineering Bldg., Knoxville, TN 37006-2210

Abstract

One of the methods used for industrial cleansing applications employs a mixture of gaseous nitrogen and liquid water injected upstream of a converging-diverging nozzle located at the end of a straight wand assembly. The idea is to get the mixture to impact the surface at the maximum momentum flux possible in order to maximize the cleansing effectiveness. This paper presents an analysis geared towards this application in which the effects of slip and heat transfer between the gas and liquid phases are present. The model describes the liquid momentum flux (considered a figure of merit for cleansing) under a host of design conditions. While it is recognized that the emulsification mechanism responsible for cleansing is far more complicated than simply being solely dependent on the liquid momentum flux, the analysis presented here should prove useful in providing sufficiently accurate results for nozzle design purposes. [S0098-2202(00)01801-0]

Publisher

ASME International

Subject

Mechanical Engineering

Reference13 articles.

1. Sherif, S. A., 1993, “Optimization Analysis of Supersonic Flow of Nitrogen/Water Mixtures Through Converging-Diverging Nozzles” 1993 Research Report, NASA/ASEE Summer Faculty Fellowship Program, E. R. Hosler, C. Valdes, and T. Brown, eds., NASA Contractor Report No. CR-194678 (Supplement 11), Grant No. NASA-KSC-NGT-60002, National Aeronautics and Space Administration John F. Kennedy Space Center, Cape Canaveral, Fl.

2. Finnie, I. , 1972, “Some Observations on the Erosion of Ductile Metals,” Wear, 19, pp. 81–90.

3. Klausner, J. F., Mei, R., Near, S., and Stith, R., 1998, “Two-Phase Jet Impingement for Non-Volatile Residue Removal,” Proceedings of the Insitution of Mechanical Engineers - Part E, Vol. 212, pp. 271–279.

4. Goodwin, J. E., Sage, W., and Tilly, G. P., 1969, Proceedings of Institution of Mechanical Engineers, Vol. 184, pp. 279–292.

5. Sheldon, G. L. , 1970, “Similarities and Differences in the Erosion Behavior of Materials,” ASME J. Basic Eng., 92, pp. 619–626.

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