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Ebullition et cavitation hydrodynamiques dans un écoulement de frigorigène (R-123) à l'intérieur de microcanaux.

Hydrodynamic cavitation and boiling in refrigerant (R-123) flow inside microchannels.

Auteurs : SCHNEIDER B., KOSAR A., PELES Y.

Type d'article : Article

Résumé

This research article investigates the effect that hydrodynamic cavitation has on heat transfer. The fluid medium is R-123 flowing through 227-micron hydraulic diameter microchannels. The cavitation is instigated by the inlet orifice. Adiabatic tests were conducted to study the two-phase cavitating flow morphologies and hydrodynamic characteristics of the flow. Diabatic experiments were performed resulting in surface temperatures under heat fluxes up to 213 W/cm2 and mass velocities from 622 to 1368 kg/m2.s. Results were compared to non-cavitating flows at the same mass velocities. It was found that the cavitating flows can significantly enhance the heat transfer. The heat transfer coefficient of the cavitating flows was larger than the non-cavitating flows by as much as 84%. Single-phase and two-phase heat transfer coefficients have been elucidated and employed to deduce the heat transfer mechanism prevailing under boiling conditions with and without the presence of cavitation. [Reprinted with permission from Elsevier. Copyright, 2007].

Détails

  • Titre original : Hydrodynamic cavitation and boiling in refrigerant (R-123) flow inside microchannels.
  • Identifiant de la fiche : 2007-1986
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 50 - n. 13-14
  • Date d'édition : 07/2007

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