Two-dimensional velocity vector profile measurement on bubbly flow using ultrasonic technique

Abstract

This present paper describes a measurement technique for two-dimensional (2D) velocity vector profile in the two-phase bubbly flow. The Ultrasonic Velocity Profiler (UVP) method which is a nonintrusive technique and applicable for the real-time measurement, is proposed to obtain a 2D velocity vector of the bubbles and liquid phase simultaneously. To achieve this aim, the transducers with special configuration and developed signal processing have been applied to the UVP system to reconstruct and decompose a 2D velocity vector of the bubbles and liquid. For confirming the applicability of modified UVP, the experiment was conducted on a rectangular column flow loop. The 2D velocity vector profile measurement in two-phase bubbly flow was performed experimentally. The applicability of measurement was validated by other methods.