A double-sensor probe was used to measure local interfacial parameters of a gas-liquid bubbly flow in a horizontal tube. The parameters included void fraction, interfacial concentration, bubble size distribution, bubble frequency and bubble interface velocity. The authors paid special attention to the probe design and construction for minimizing measurement errors. Measures were also taken in the design of sensor ends for preventing corrosions in the flow. This is an effort to improve the current double-sensor probe technique to meet the ever-increasing needs to local parameter measurements in gas-liquid two-phase flows.
This paper presents a statistical method to calculate local interfacial variable s in horizontal gas-liquid bubbly flows based on the data measured with a double -sensor probe.The geometrical relationship between the apparent and actual bubbl e velocities and the relationship between the chord intersected by the sensor an d bubble diameter were determined.A probability density function was introduced to consider the effect of both axial and radial movements of bubbles on bubble v elocity and bubble size.
