MULTIPLE FLOW RATE MEASUREMENT USING UNSTEADY PRESSURES

摘要

A multiple flow rate measurement system includes an array of spatial filters (650-658) located a predetermined distance DELTA X apart along the pipe (12), each filter comprised of unsteady pressure sensors capable of measuring the unsteady pressure in the pipe (12). Each spatial filter (650-658) provides signals which indicative of a vortical pressure disturbance associated with a constituent within the flow mixture. The signals are cross-correlated by Cross-Correlation Logic (50) to determine a time delay tau between each of the filter locations which is divided into the distances DELTA X between certain spatial filters to obtain a convection velocity Uc(t) that is related to a velocity of a constituent within the fluid mixture.