Measurement of Volume Fraction and Bubble Velocity in Air-Water Flows through a Vertical Pipe Line using a Seven Sensor Probe

摘要

This paper describes a miniature, local seven-sensor probe for measurement of dispersed phase flow parameters in bubbly two-phase flows for a spherical droplets or bubbles. The paper describes the bubble motion model as well as the bubble probe-interaction effects. The probe works on measurement of electrical conductivity between a front probe sensor and a set of rear sensors. The presence of the bubble affects the electrical conductivity between the sensors. This change in conductivity is used in the model to predict the dispersed phase velocity. The resulting equations are highly non-linear and hence a solution scheme has been developed that enables computation of accurate velocity field and bubble dimensions.