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Distribution des vitesses et excitation des vibrations des faisceaux de tubes d'échangeurs de chaleur.

Velocity distribution and vibration excitation in tube bundle heat exchangers.

Auteurs : MOHR U., GELBE H.

Type d'article : Article

Résumé

Design criteria for tube bundle heat exchangers, to avoid fluid-elastic instability, are based on stability criteria for ideal bundles and uniform flow conditions along the tube length. In real heat exchangers, a non-uniform flow distribution is caused by inlet nozzles, impingement plates, baffles and bypass gaps. With computational fluid dynamic programs, it is possible to calculate the velocity distribution in real tube bundles and to determine the most endangered tube and thereby the critical volume flow. The paper moreover presents results and design equations for the inlet section of heat exchangers with variations of a broad range of geometrical parameters, e.g. tube pitch, shell diameter, nozzle diameter, span width, distance between nozzle exit and tube bundle.

Détails

  • Titre original : Velocity distribution and vibration excitation in tube bundle heat exchangers.
  • Identifiant de la fiche : 2001-1329
  • Langues : Anglais
  • Source : Rev. gén. Therm./Int. J. therm. Sci. - vol. 39 - n. 3
  • Date d'édition : 03/2000

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