Real-Time Cross-Sectional Averaged Void Fraction Measurements in Vertical Annulus Gas-Liquid Two-Phase Flow by Neutron Radiography and X-ray Tomography Techniques

A Real-Time Neutron Radiography (RTNR) system and a High Speed X-ray Computed Tomography (X-CT) system are compared for measurement of two-phase flow. Each system is used to determine the flow regime, the instantaneous cross-sectional averaged void fraction, and the time averaged void fraction in a vertical annulus flow channel. A standard optical video system is also used to observe the flow regime. The annulus flow channel is operated as a …