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Conception et simulation numérique d’un compresseur frigorifique pour système cryogénique à l’hélium superfluide à grande échelle.

Design and numerical simulation of a cold compressor for large scale superfluid helium cryogenic system.

Numéro : pap. n. 1699

Auteurs : DONG X., WU J., SU H., et al.

Résumé

In large scale superfluid helium system, cold compressor is utilized to pump down gaseous helium from saturated liquid helium tank for producing superfluid helium. In this paper, a three-dimensional geometry of the whole stage of the cold compressor is built and simulation is carried out to verify the performance using the commercial program code (CFX). Considering the extremely low inlet pressure and temperature of each cold compressors, the real gas effect is considered to design and simulate such flow passages of each stages. To improve the accuracy of the simulation results, helium properties obtained by different equations of state are compared with NIST database. As a result ,the ARK state equation maintains the maximum error deviation of density and specific heat below 1.8 %. Then it is utilized in CFD simulation and the details on the flow field within stage is presented.

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Pages : 9

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Détails

  • Titre original : Design and numerical simulation of a cold compressor for large scale superfluid helium cryogenic system.
  • Identifiant de la fiche : 30025938
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.1699

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