A nonintrusive auto-transformer technique for measuring phase volume ratio in oil–water two-phase stratified flow

This paper contains a measurement of local oil volume fraction by using the auto-transformer technique in stratified oil–water flow. A non-flow oil–water system was used for calibration of the flow system. The results were compared with the capacitance technique. It was found that this technique is suitable for measuring the phase cut for liquid–liquid two-phase oil–water flows, with an error not exceeding ± 8% for an oil volume fraction of more than a half.