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Modélisation de l'écoulement à très basse pression d'hélium dans la ligne de distribution cryogénique après une transition dans le grand collisionneur de hadrons au CERN.

Modelling of the very low pressure helium flow in the LHC cryogenic distribution line after a quench.

Auteurs : BRADU B., GAYET P., NICULESCU S. I., et al.

Type d'article : Article

Résumé

This paper presents a dynamic model of the helium flow in the cryogenic distribution line (QRL) used in the Large Hadron Collider (LHC) at CERN. The study is focused on the return pumping line, which transports gaseous helium at low pressure and temperature over 3.3 km. The authors' aim is to propose a new real-time model of the QRL while taking into account the non-homogeneous transport phenomena. The flow model is based on 1D Euler equations and considers convection heat transfers, hydrostatic pressure and friction pressure drops. These equations are discretized using a finite difference method based on an upwind scheme. A specific model for the interconnection cells is also proposed. The corresponding simulation results are compared with experimental measurements of a heat wave along the line that results from a quench of a superconducting magnet. Different hypotheses are presented and the influence of specific parameters is discussed. [Reprinted with permission from Elsevier. Copyright, 2009].

Détails

  • Titre original : Modelling of the very low pressure helium flow in the LHC cryogenic distribution line after a quench.
  • Identifiant de la fiche : 2010-1025
  • Langues : Anglais
  • Source : Cryogenics - vol. 50 - n. 2
  • Date d'édition : 02/2010
  • DOI : http://dx.doi.org/10.1016/j.cryogenics.2009.11.004

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