Ultrasonic flow measurement and wall acoustic impedance effects.
An examination of the influence of wall acoustic impedance effects on sound propagation in flowing liquids confined by cylindrical walls is presented. Special focus is given to the importance of the wall acoustic impedance value for ultrasonic flow meter performance. The mathematical model presented allows any radially-dependent axial flow profile to be examined in the linear flow acoustics regime where fluid flow speed is much smaller than the fluid sound speed everywhere in the fluid medium.
Mads Clausen Institute for Product Innovation, University of Southern Denmark, Grundtvigs Alle 150, DK-6400 Sønderborg, Denmark. willatzen@mci.sdu.dk
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Willatzen
D000158:Acoustic Impedance Tests; D008433:Mathematics; D008962:Models, Theoretical; D012212:Rheology / Q000379:methods*; D014465:Ultrasonics