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Analyse théorique et expérimentale de l'évolution du diamètre, de la température et du taux d'évaporation des gouttelettes issues de pulvérisateurs cryogéniques.

Theoretical and experimental analysis of droplet diameter, temperature, and evaporation rate evolution in cryogenic sprays.

Auteurs : AGUILAR G., MAJARON B., VERKRUYSSE W., et al.

Type d'article : Article

Résumé

Cryogenic sprays are used for cooling human skin during selected laser treatments in dermatology. In order to optimize their cooling efficiency, a detailed characterization and understanding of cryogen spray formation is required. Various instruments and procedures are used to obtain mean size (D), velocity (V), and temperature (T) of tetra-fluoroethane spray droplets from straight-tube nozzles. A single-droplet evaporation model is used to predict droplet diameter and temperature as a function of distance from the nozzle, D(z) and T(z), from the values of D, V, and T at the nozzle exit, i.e. D(o) V(o) and T(o). The predicted evolutions of T(z) and D(z) are in reasonable agreement with experimental data.

Détails

  • Titre original : Theoretical and experimental analysis of droplet diameter, temperature, and evaporation rate evolution in cryogenic sprays.
  • Identifiant de la fiche : 2002-2155
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 44 - n. 17
  • Date d'édition : 09/2001

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