Multiple flow rate measurement using unsteady pressures

Details Multiple flow rate measurement using unsteady pressures Multiple flow rate measurement using unsteady pressures

G - Physics

01

F

G01F 1/74 (2006.01) G01F 1/708 (2006.01) G01F 1/712 (2006.01)

Patent

CA 2381902

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 ~ 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.

L'invention concerne un système de mesure de débit d'écoulement de plusieurs constituants, comprenant un réseau de filtres spatiaux (650-658) situés à une distance prédéterminée .DELTA.X les uns des autres le long d'un tuyau (12), chaque filtre étant pourvu de capteurs de pressions non stabilisées capable de mesurer une pression non stabilisée dans ledit tuyau (12). Chaque filtre spatial (650-658) fournit des signaux qui indiquent une perturbation de pression tourbillonnaire associée à un constituant dans le mélange d'écoulement. Les signaux sont inter-corrélés au moyen d'une logique d'inter-corrélation (50), de façon à déterminer un retard temporel ~ entre chaque implantation de filtre, qui est divisé en distances .DELTA.X entre certains filtres spatiaux, afin d'obtenir une vélocité de convection U¿c?(t) associée à une vélocité d'un constituant du mélange fluidique.

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