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Condensation of zinc vapor in a supersonic carrier gas

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Abstract

A study of the condensation of a metal vapor in an inert carrier gas is made. Superheated zinc vapor is generated in a hot shot wind tunnel in a helium carrier gas and expanded in a converging-diverging nozzle. Static pressure measurements along the length of the nozzle are made to determine the location of the onset of condensation. A conical nominal Mach 5 (helium) nozzle is employed. The amount of supercooling before the onset of condensation is found to be approximately 430 K, measured along the isentrope over a range of initial zinc mass fractions of .35 to .70 for saturation partial pressures of zinc between 10 psia and 70 psia. The measurements are compared with results of an analysis based on the classical liquid drop model of nucleation. The computed results agree reasonably well with the measurements.

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Authors and Affiliations

  1. Aerospace Engineering Dept., The University of Michigan, Ann Arbor, Michigan, USA

    D. D. McBride, P. M. Sherman & T. H. Pierce

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  1. D. D. McBride
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  2. P. M. Sherman
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  3. T. H. Pierce
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McBride, D.D., Sherman, P.M. & Pierce, T.H. Condensation of zinc vapor in a supersonic carrier gas. Appl. Sci. Res. 25, 83–96 (1972). https://doi.org/10.1007/BF00382286

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