Transmission-mode ultrasonic measurement for gas/water two-phase flow

C. Xu, C. Tan, W. Zhang, F. Dong

Tianjin Key Laboratory of Process Measurement and Control

School of Electrical Engineering and Automation, Tianjin University, Tianjin, 300072, China

Abstract

As a non-contact, low-cost and high-resolution 2D/3D boundary technique, UCT has wide application prospect. For gas/water two-phase flow, the ultrasonic energy would be reflected about 99.94% at the boundary. The relations between voltage loss and bubble diameter can be established due to the near total reflection at the boundary. One-transmitter-three-receiver narrow band ultrasonic measurement system was developed for two- phase flow measurement. Calibration experiments were conducted in different diameters. After the calibration, the image reconstructed by filtered linear back-projection method showed that the images had good resolution with minimum resolvable diameter of 1.5mm.

Keywords: Data acquisition; Two-phase flow; Transmission-mode; Ultrasonic; Linear back-projection