A dual optical probe for volume fraction, drop velocity and drop size measurements in liquid-liquid two-phase flow

This paper describes the development and application of a dual optical prob e for local volume fraction, drop velocity and drop size measurements in a kerosene-water liquid liquid two-phase flow. A sampling tube procedure and interface tests were used to calibrate the leading optical sensor and both optical sensors fur measurements of the local volume fraction and drop velo city as described in this paper Measurements were carried out in a large-sc ale vertical two-phase facility mainly at the pipe centre-line to demonstra te the advantages of using optical fibres with normal cut ends in a kerosen e-water two-phase flow Finally the applicability of this probe for measurem ents in gas-liquid two-phase flows and gas-kerosene-water three-phase flows has also been demonstrated.