Flow pattern,void fraction and pressure drop of refrigerant two-phase flow in a horizontal pipe—II: Analysis of frictional pressure drop |
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| Authors: | Kenichi Hashizume Hiroyasu Ogiwara Hiroshi Taniguchi |
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| Affiliation: | Energy Science & Technology Laboratory, R & D Center, Toshiba Corporation, Ukishimacho 4-1, Kawasaki, Japan;Department of Mechanical Engineering, Hokkaido University, Sapporo, Japan |
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| Abstract: | Two-phase flow in horizontal pipe was analyzed with simplified models for annular and stratified flow. The velocity profiles for the liquid and gas phase were described with the Prandtl mixing length. From this analysis, the frictional pressure drop was calculated with the modified Baker map for flow pattern transition. The intermediate region, i.e. wavy flow, was interpolated between annular and stratified flow. Comparison of this analysis with existing experimental data of refrigerants showed good agreement. |
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