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Modèle de prévision mécaniste des taux de fuite à travers des fissures.

Mechanistic prediction model for leakage rates through cracks.

Auteurs : FRIEDEL L., WESTPHAL F.

Type d'article : Article

Résumé

A mechanistic model for prediction of leakage rates through small, slit-shaped, subcritical through-wall cracks is proposed. It encompasses the whole range of possible upstream fluid states from subcooled liquid via two-phase mixture to superheated vapor. The model is, essentially, based on a semi-empirical relationship for the transient pressure drop across the crack and the concept of Pana for a critical mass flux calculation. The leakage rate predictions are checked against our own and literature data obtained in experiments with subcritical and critical flow of initially subcooled nonflashing and flashing refrigerants and water through real and model cracks over a wide parameter ranges. The overall predictive accuracy is in the range of the measuring accuracy of the experimental results and hence sufficient for technical purposes.

Détails

  • Titre original : Mechanistic prediction model for leakage rates through cracks.
  • Identifiant de la fiche : 30009146
  • Langues : Anglais
  • Source : Experimental Thermal and Fluid Science - vol. 3 - n. 5
  • Date d'édition : 09/1990
  • DOI : http://dx.doi.org/10.1016/0894-1777(90)90067-H

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