Measurements of Dispersed Phase Velocity in Two-Phase Flows in Pipelines Using Gamma-Absorption Technique and Phase of the Cross-Spectral Density Function

Abstract

This paper concerns the application of the gamma radiation absorption method in the measurements of dispersed phase velocity in two-phase flows: liquid–gas flow in a horizontal pipeline and liquid–solid particles in a vertical pipe. Radiometric sets containing two linear 241Am gamma radiation sources and two NaI(Tl) scintillation detectors were used in the research. Due to the stochastic nature of the signals obtained from the scintillation probes, statistical methods were used for their analysis. The linear average velocity of the dispersed phase transportation was calculated using the phase of the cross-spectral density function of the signals registered by the scintillation detectors. It is shown that in the presented cases, the phase method can be more accurate than the most commonly used classical cross-correlation one.

A Novel Smart Optimized Capacitance-Based Sensor for Annular Two-Phase Flow Metering With High Sensitivity

“…Salehi and his co-workers proposed a new shape of electrode named TRFLC to identify the pattern of flow in two-phase oil-gas horizontal tubes [26]. Computational and mathematical calculations, combined with Digital Signal Processing (DSP) techniques, specifically Artificial Neural Network (ANN), are being extensively used as a highly effective mathematical tool to solve complex engineering problems in various fields such as electrical engineering [27], [28], [29], [30], civil engineering [31], [32], instrumentation and control engineering [33], [34], Nano electronic [35], [36], chemical, and petrochemical engineering [37], [38], [39], [40], [41], [42].…”