Elongated bubble shape in inclined air-water slug flow |
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| Institution: | 1. Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China;2. Department of Energy Engineering, Co-Innovation Center for Advanced Aero-Engine, Zhejiang University, Hangzhou 310027, China;1. The University of Tulsa, 2450 E Marshall St. NCDB 105D, Tulsa, OK 74110, USA;2. Autonomous Metropolitan University, México;3. Currently with The University of Oklahoma, OK, USA |
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| Abstract: | The shape of elongated bubbles in upward inclined air-water slug flow was studied experimentally by quantitative measurements of the cross sectional distribution of the phases within the pipe, using a wire mesh sensor. Ensemble-averaged shapes of elongated bubbles were determined for a wide range of gas and liquid flow rates, as well as for different pipe inclination angles. The elongated bubble nose can be characterized by an annular domain where liquid is present above the gas. The effect of gas and liquid flow rates, as well as of the pipe inclination angle on the bubble shape (front and tail) is studied. A simplified theoretical model is proposed to determine the bubble front shape. The model predictions compare favorably with the experimental results. |
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