Initial study on ultrasonic tomography for multiphase flow application

This paper presents the initial study on ultrasonic tomography for multiphase flow application to investigate ability of ultrasonic tomography for used in monitoring the three phase flow (solid/liquid/gas) at once since there are no research on this conducted yet. In this project, eight units of 40 kHz ultrasonic sensors were mounted non-invasively around the pipe wall where four of it acts as a transmitter and the other four as a receiver. Each transmitter will transmit two cycles of pulses of 40 kHz at an excitation voltage of 24Vp-p. By using transmission-mode and fan-shaped beam projection approach, the peak to peak voltage of the received ultrasonic wave are measured. The investigation was based on the transmission and reception of sensors that were mounted circularly on the surface of experiment vessel. The results obtained throughout this research project had shown that different flow condition and composition will gives different value of output voltage. And the information and analysis of the results can be used for further investigation on the three phase system