Experimental study on two-phase gas-liquid flow patterns at normal and reduced gravity conditions  

作　　者：赵建福 解京昌 林海 胡文瑞 

出　　处：《Science China(Technological Sciences)》2001年第5期553-560,共8页中国科学（技术科学英文版）

基　　金：This work was supported by the National Natural Science Foundation of China (Grant No. 19789201) ;the Ministry of Science and Technology of China (Grant No. 95-Yu-34) . The authors wish to gratefully acknowledge the invaluable assistance of Profs. Y.

摘　　要：Experimental studies have been performed for horizontal two-phase air-water flows at nor-mal and reduced gravity conditions in a square cross-section channel. The experiments at reducedgravity are conducted on board the Russian IL-76 reduced gravity airplane. Four flow patterns, namelybubble, slug, slug-annular transition and annular flows, are observed depending on the liquid and gassuperficial velocities at both conditions. Semi-theoretical Weber number model is developed to includethe shape influence on the slug-annular transition. It is shown that its prediction is in reasonable agree-ment with the experimental slug-annular transition under both conditions. For the case of two-phasegas-liquid flow with large value of the Froude number, the drift-flux model can predict well the observedboundary between bubble and slug flows.Experimental studies have been performed for horizontal two-phase air-water flows at normal and reduced gravity conditions in a square cross-section channel. The experiments at reduced gravity are conducted on board the Russian IL-76 reduced gravity airplane. Four flow patterns, namely bubble, slug, slug-annular transition and annular flows, are observed depending on the liquid and gas superficial velocities at both conditions. Semi-theoretical Weber number model is developed to include the shape influence on the slug-annular transition. It is shown that its prediction is in reasonable agreement with the experimental slug-annular transition under both conditions. For the case of two-phase gas-liquid flow with large value of the Froude number, the drift-flux model, can predict well the observed boundary between bubble and slug flows.

关 键 词：microgravity  TWO-PHASE GAS-LIQUID flow  FLOW pattern  NON-CIRCULAR cross-section. 

分 类 号：O359[理学—流体力学]