New four-sensor probe theory for multi-dimensional two-phase flow measurement

Shen, X.*; Nakamura, Hideo  

A complete four-sensor probe measurement theory was newly developed to obtain local instantaneous 3D bubble velocity vector, local instantaneous bubble diameter and local instantaneous interfacial normal unit vector and local time-averaged interfacial area concentration (IAC) in a multi-dimensional two-phase flow by assuming the bubbles to be spherical. The bubbles are classified into spherical and non-spherical bubbles by introduction of a bubble deviation coefficient from a spherical shape. The measured results were checked against such parameters as void fraction, superficial gas velocity, bubble diameter and IAC and confirmed the excellent measurement capability of the developed theory.