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

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 mID and 1.0 m in length. The range of the inclination angle is 45°–90° from the horizontal. The experiment focusedon the effect of the inclination angle show that the mean liquid slug length and Taylor bubble length increase withthe 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 verticaltube, 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.