Cryogenic Liquid Slug and Taylor Bubble Length Distributions in an Inclined Tube

Abstract

Abstract: An experimental study was carried out to understand the phenomena of the boiling flow of liquid nitrogen in an inclined tube with closed bottom by using a high speed motion analyzer.The experimental tube is 0.018 m ID and 1.0 m in length.The range of the inclination angle is 45°-90° from the horizontal.The experiment focused on the effect of the inclination angle show that the mean liquid slug length and Taylor bubble length increase with the increasing x/D at various inclination angles.At the same x/D, the mean liquid slug length and Taylor bubble length increase first, and then decrease with decreasing inclination angles, with the maximum at 60°.In the vertical tube, standard deviation of the nitrogen Taylor bubble length increase with the increasing x/D.For the inclined tube, standard deviation of the nitrogen Taylor bubble length increases first, and then decreases with the increasing x/D.Standard deviation of the liquid slug length increases with increasing x/D for all inclination angles.

Key words: nitrogen, boiling, Taylor bubble, liquid slug, length distribution, inclined tube

摘要： An experimental study was carried out to understand the phenomena of the boiling flow of liquid nitrogen in an inclined tube with closed bottom by using a high speed motion analyzer.The experimental tube is 0.018 m ID and 1.0 m in length.The range of the inclination angle is 45°-90° from the horizontal.The experiment focused on the effect of the inclination angle show that the mean liquid slug length and Taylor bubble length increase with the increasing x/D at various inclination angles.At the same x/D,the mean liquid slug length and Taylor bubble length increase first,and then decrease with decreasing inclination angles,with the maximum at 60°.In the vertical tube,standard deviation of the nitrogen Taylor bubble length increase with the increasing x/D.For the inclined tube,standard deviation of the nitrogen Taylor bubble length increases first,and then decreases with the increasing x/D.Standard deviation of the liquid slug length increases with increasing x/D for all inclination angles.

关键词: nitrogen, boiling, Taylor bubble, liquid slug, length distribution, inclined tube

WANG Shuhua, ZHANG Hua, WANG Jing. Cryogenic Liquid Slug and Taylor Bubble Length Distributions in an Inclined Tube[J]. , 2009, 17(1): 20-26.

王淑华, 张华, 王经. Cryogenic Liquid Slug and Taylor Bubble Length Distributions in an Inclined Tube[J]. , 2009, 17(1): 20-26.

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