An apparatus and method of measuring gas volume fraction of...

G - Physics – 01 – F

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G01F 1/74 (2006.01) G01F 1/66 (2006.01) G01N 29/024 (2006.01)

Patent

CA 2516255

An apparatus (10,110) is provided that measures the speed of sound or acoustic disturbances propagating in a fluid or mixture having entrained gas/air to determine the gas volume fraction of the flow (12) propagating through a pipe (14). The apparatus includes an array of pressure sensors disposed axially along the length of the pipe. The apparatus measures the speed of sound propagating through the fluid to determine the gas volume fraction of the mixture using adaptive array processing techniques to define an acoustic ridge in the k-.omega. plane. The slope of the acoustic ridge (61) defines the speed of sound propagating through the fluid in the pipe.

L'invention concerne un appareil (10,110) mesurant la vitesse des perturbations sonores ou acoustiques qui se propagent dans un fluide ou un mélange possédant un gaz/air entraîné afin de déterminer la fraction de volume de gaz du flux (12) circulant à travers un conduit (14). Cet appareil comprend un réseau de détecteurs de pression disposés dans le sens axial le long de la longueur du conduit. Cet appareil mesure la vitesse du son qui se propage à travers le fluide afin de déterminer la fraction de volume de gaz au moyen de techniques de traitement de réseau adaptatives afin de définir une crête acoustique dans le plan k-O. La pente de la crête acoustique (61) définit la vitesse du son qui se propage à travers le fluide dans le conduit.

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