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Écoulement en surface libre d’oxygène liquide sous un champ magnétique non uniforme.

Free-surface flow of liquid oxygen under non-uniform magnetic field.

Auteurs : BAO S., ZHANG R., WANG K.

Type d'article : Article

Résumé

The paramagnetic property of oxygen makes it possible to control the two-phase flow at cryogenic temperatures by non-uniform magnetic fields. The free-surface flow of vapor-liquid oxygen in a rectangular channel was numerically studied using the two-dimensional phase field method. The effects of magnetic flux density and inlet velocity on the interface deformation, flow pattern and pressure drop were systematically revealed. The liquid level near the high-magnetic channel center was lifted upward by the inhomogeneous magnetic field. The interface height difference increased almost linearly with the magnetic force. For all inlet velocities, pressure drop under 0.25 T was reduced by 7–9% due to the expanded local cross-sectional area, compared to that without magnetic field. This work demonstrates the effectiveness of employing non-uniform magnetic field to control the free-surface flow of liquid oxygen. This noncontact method may be used for promoting the interface renewal, reducing the flow resistance, and
improving the flow uniformity in the cryogenic distillation column, which may provide a potential for enhancing the operating efficiency of cryogenic air separation.

Détails

  • Titre original : Free-surface flow of liquid oxygen under non-uniform magnetic field.
  • Identifiant de la fiche : 30021132
  • Langues : Anglais
  • Source : Cryogenics - vol. 81
  • Date d'édition : 12/2016
  • DOI : http://dx.doi.org/10.1016/j.cryogenics.2016.12.002

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