Measurement simulation of gas pressure by ultrasound in a two phase flow fluid

Abstract

The adequate use of ultrasound permits the measurement of carbon dioxide pressure in a two-phase flow fluid. The proposed method relies on the measurement of radial mixture velocities acquired from ultrasound data by Doppler effect. The gas pressure is calculated knowing the measured radial velocities using Drift flux model and Young-Laplace equations The modeling of system response consists on the determination of elemental acoustic signals through radial mixture velocities and volumetric gas fraction calculated at two positions of the measurement domain. The summation of these signals gives the total responses. The frequency spectra of these signals permits the calculation of the radial mixture velocities and consequently estimate the gas pressure through the mean mixture pressure.