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Un nouveau type d'écoulement dans des tubes à pulsation.

A new type of streaming in pulse tubes.

Auteurs : LIANG W., WAELE A. T. A. M. de

Résumé

By numerical simulation a new type of streaming in pulse tubes has been found. The geometry in the simulation consists of the pulse tube with its flow straighteners. The straighteners are described as a porous medium. Viscous effects are taken into account, but heat transfer with the wall is not considered. The gas flow in the pulse tube is periodic. Positive and negative boundary conditions are imposed which result in flow fields with opposing directions. The net flow field is obtained by the superposition of these two flow fields. It turns out that two loops are formed in the tube. This paper analyzes this phenomenon and explains how the flow resistance of the straightener and the viscous effect of the tube wall result in this type of streaming.

Détails

  • Titre original : A new type of streaming in pulse tubes.
  • Identifiant de la fiche : 2008-1058
  • Langues : Anglais
  • Date d'édition : 14/06/2006
  • Source : Source : Proc. 14th int. Cryocooler Conf., Annapolis, MD
    271-276; fig.; 4 ref.

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