On the accuracy of gas flow rate measurements in gas-liquid pipe flows by cross-correlating dual wire-mesh sensor signals

This article presents an assessment of the accuracy of gas flow rate measurement in gas-liquid pipe flows by cross-correlating dual wire-mesh sensor signals. The differences between the estimated and the actual gas superficial velocities in different flow regimes were analyzed. It was demonstrated that this gas flow rate measurement method is susceptible to significant systematic errors, some of which are inherent to the use of cross-correlation and others which are specific to wire-mesh sensors. It was concluded that this method would be accurate only for flow conditions within narrow ranges.