[3J09-15] Gas-liquid Two-phase Flow

[3J14] Effects of Water Level in the Upper Tank on Flow Characteristics in a Vertical Pipe under Flooding at Its Top End

*Toshiya Takaki¹, Ryo Kurimoto², Kosuke Hayashi², Michio Murase¹, Akio Tomiyama² (1. INSS, 2. Kobe Univ.)

Keywords:Vertical pipe, Countercurrent flow, Flooding at upper end, Flow characteristics, Liquid volume fraction

Experiments for air-water countercurrent flows in the vertical pipe with the diameter of 40 mm were carried out, effects of the water level in the upper tank on the flow characteristics inside the pipe under flooding at its top end were measured, and the change of the liquid volume fraction α_L with increasing the gas volume flux J_G was well computed by the annular low model.