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He II : oscillation thermoacoustique et transfert thermique.

Thermoacoustic oscillation and heat transfer in He II.

Auteurs : KOBAYASHI H., YOSHIDA H., SUGANUMA Y., et al.

Résumé

Thermoacoustic oscillation with continuous sound-emissions is triggered at the lambda-transition on an innermost heated-surface in a channel of subcooled He II. The oscillation causes a considerable cooling effect. At lower bath pressures above the lambda-pressure, two types of the oscillation appear periodically in the thermoacoustic boiling state; one contributes strong cooling with clear sounds of fundamental frequency, the other emits noisy sounds with weak cooling. Some workflow may compensate a reduction in the heat-flow during the oscillation. The fundamental frequency depends on the channel length reflecting the nature of the first sound.

Détails

  • Titre original : Thermoacoustic oscillation and heat transfer in He II.
  • Identifiant de la fiche : 2006-0031
  • Langues : Anglais
  • Source : Proceedings of the nineteenth International Cryogenic Engineering Conference. ICEC 19.
  • Date d'édition : 22/07/2002

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