Flow characteristics of gas-liquid two-phase annular flow under microgravity

摘要

It is important for the realization of two-phase flow thermal control systems to clarify the two-phase flow behavior under micro gravity. In order to study the effect of the gravity on the liquid film structure in two-phase annular flow, experiments under microgravity for an adiabatic gas-liquid flow in a vertical tube of 10.5 mm ID were carried out by utilizing parabolic trajectory flights. Gaseous nitrogen and water were used as the working fluids. The effects of the liquid and gas velocities on the liquid film structure are shown. The measured results of the liquid film thickness in microgravity experiments were compared with those on the ground level and 2G.