An investigation of the effects of system parameters on the production of hollow hydrogen droplets

J. L. Guttman, C. D. Hendricks, K. Kim, R. J. Turnbull

Research output: Contribution to journalArticle

Abstract

An experimental study on the production of spherical shells of liquid and solid hydrogen is described. These shells are made by acoustically breaking up a jet of superheated liquid hydrogen into drops and at the same time cavitating a bubble in the center of each drop. The resulting growth of the bubbles by evaporation produces the spherical shells. The size and the aspect ratio of the spherical shells are found to be affected by several parameters. The mass of the drop depends on the diameter of the nozzle from which the jet emerges. Also, varying the frequency of the acoustic excitation gives some control of the droplet size. The aspect ratio depends most strongly on the liquid temperature and the droplet-chamber pressure. Increasing the temperature or lowering the pressure increases the aspect ratio of the shell. If the pressure is lowered below the triplet-point pressure of hydrogen, the shells freeze forming a spherical shell of solid hydrogen.

Original languageEnglish (US)
Pages (from-to)4139-4142
Number of pages4
JournalJournal of Applied Physics
Volume50
Issue number6
DOIs
StatePublished - Dec 1 1979

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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