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Visualization of non-equilibrium two-phase flow.

Number: 1864

Author(s) : RASTI M., JEONG J. H.

Summary

Recently, a few researchers have reported the presence of two-phase flow under subcooled conditions at the inlet of the capillary tube. In the present study, the effects of ambient temperature and R600a charge amount on the non-equilibrium two-phase state were investigated. The visualization results for most of the experiments demonstrated the presence of a non-equilibrium state at the inlet of capillary tubes of a refrigerator-freezer. The measured mass flow rates were compared with values predicted by Rasti et al. and Wolf and Pate empirical correlations to investigate accuracy of empirical correlations under the non-equilibrium state. Both correlations could predict the mass flow rate with large deviations under a non-equilibrium state. Finally, a new empirical correlation was introduced to calculate the equivalent thermodynamic quality under the non-equilibrium state. The modified version of Rasti et al.’s correlation showed that 78.3% of data under the non-equilibrium state fell within relative deviations of +/-25%.

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Pages: 8

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Details

  • Original title: Visualization of non-equilibrium two-phase flow.
  • Record ID : 30028891
  • Languages: English
  • Subject: Technology
  • Source: 6th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2021/09/01
  • DOI: http://dx.doi.org/10.18462/iir.TPTPR.2021.1864
  • Document available for consultation in the library of the IIR headquarters only.

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