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Prediction of the transition criterion to annular flow in the two-phase flow pattern of refrigerants.

Author(s) : LIM T. W., PARK J. U.

Type of article: Article

Summary

Two-phase flow pattern data during horizontal in-tube flow boiling are presented for pure and mixed R134a and R123 refrigerants. The results obtained are compared with various correlations for flow pattern described in the literature. The flow pattern map of Hashizume agreed very well with the present data except in the region of low mass velocity. The Weisman flow pattern map was also known to satisfactorily predict data for refrigerants in the region of annular flow. In order to establish the transition quality of annular flow in this study, flow patterns were simply classified into two groups; stratified (including intermittent, stratified and stratified-wavy) flow and unstratified (annular) flow. The transition quality from stratified to unstratified flow was obtained by modifying the liquid Froude number.

Details

  • Original title: Prediction of the transition criterion to annular flow in the two-phase flow pattern of refrigerants.
  • Record ID : 2004-1575
  • Languages: English
  • Source: JSME int. J., B - vol. 46 - n. 4
  • Publication date: 2003/11
  • Document available for consultation in the library of the IIR headquarters only.

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