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Delai de propagation du mouillage pendant le trempage à l'aide d'un jet incident pour une surface à température élevée.

Delay of wetting propagation during jet impingement quenching for a high temperature surface.

Auteurs : MOZUMDER A. K., MONDE M., WOODFIELD P. L.

Type d'article : Article

Résumé

Transient heat transfer has been investigated experimentally with a subcooled water jet during quenching of hot cylindrical blocks made of copper, brass and steel for initial surface temperatures from 250 to 400°C. The jet velocity was from 3 to 15 m/s and jet subcooling from 5 to 80 K with a jet diameter of 2 mm. When the jet strikes the hot surface, the wetting front becomes stagnant for a certain period of time in a small central region before wetting the entire surface. This wetting delay may be described as the resident time which is a strong function of block material and jet subcooling and also a function of initial block temperature and jet velocity. New correlations for the resident time and the surface temperature at the resident time at the wetting front have been proposed. [Reprinted with permission from Elsevier, Copyright, 2005].

Détails

  • Titre original : Delay of wetting propagation during jet impingement quenching for a high temperature surface.
  • Identifiant de la fiche : 2006-1652
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 48 - n. 25-26
  • Date d'édition : 04/2006

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