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

Author(s) : AGUILAR G., MAJARON B., VERKRUYSSE W., et al.

Type of article: Article

Summary

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.

Details

  • Original title: Theoretical and experimental analysis of droplet diameter, temperature, and evaporation rate evolution in cryogenic sprays.
  • Record ID : 2002-2155
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 44 - n. 17
  • Publication date: 2001/09

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