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Document IIF

Modélisation de l’instabilité des oscillations de Taconis.

Unsteady modeling of Taconis oscillations.

Numéro : 0001

Auteurs : MATVEEV K. I.

Résumé

Spontaneous Taconis oscillations can appear inside tubes penetrating cryogenic tanks. These phenomena represent instabilities of acoustic modes under large thermal gradients. Besides inducing vibrations, Taconis oscillations also lead to large heat leaks, increasing boil-off losses of liquid cryogens. This can become a concern for actively developed systems to store clean and renewable liquid hydrogen fuel. In this study, a computationally efficient model is constructed to predict unsteady evolution of Taconis oscillations and associated heat leaks. The presented example cases include cooldown of a short narrow tube in a helium dewar and a large tube in a hydrogen storage tank. The reported results illustrate time-dependent acoustic pressure magnitudes, oscillation frequencies, spot temperatures, and thermoacoustic heat leaks, as well as spatial distributions of acoustic amplitudes, acoustic power, and temperature profiles in limit-cycle regimes. The developed model can help designers and operators of cryogenic systems prevent or control thermoacoustic instabilities and heat leaks.

Documents disponibles

Format PDF

Pages : 6 P.

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Unsteady modeling of Taconis oscillations.
  • Identifiant de la fiche : 30033864
  • Langues : Anglais
  • Sujet : Technologie
  • Source : Cryogenics 2025. Proceedings of the 18th IIR International Conference on Cryogenics, Prague, Czech Republic, 7-11 April 2025.
  • Date d'édition : 07/04/2025
  • DOI : http://dx.doi.org/10.18462/iir.cryo.2025.0001

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