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Studies of two-phase flow through a sudden expansion using electrical capacitance tomography.

Author(s) : ROMAN A. J., ERVIN J. S., CRONIN J.

Type of article: IJR article

Summary

In this work, electrical capacitance tomography (ECT) was used to measure the changes in void fraction immediately after a sudden expansion for horizontally flowing refrigerant R-134a. The two-phase flow behavior occurring in the sudden expansion was also analyzed using a high-speed camera for two different area ratios of 0.145 and 0.44. Void fractions determined from correlations found in the literature were compared with experimental measurements made immediately after a sudden expansion. It was found that none of the correlations examined could represent the behavior of the void fraction immediately after the expansion. A modified correlation was proposed to model the void fraction behavior occurring right after the expansion. This new correlation was able to predict the void fraction within a ± 20% error band when compared with experimental data at mass velocities of 50 to 250 kg m−2s−1 and area ratios of 0.145 and 0.44.

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Pages: 206-215

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Details

  • Original title: Studies of two-phase flow through a sudden expansion using electrical capacitance tomography.
  • Record ID : 30027794
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 119
  • Publication date: 2020/11
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.07.002

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