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Title: Modelling Of Transit Time Ultrasonic Flowmeters In Theoretical Asymmetric Flow
Author: Pamela I. Moore, Gregor J. Brown, Brian P. Stimpson
Source: Flomeko 2000
Year Published: 2000
Abstract: Velocity profile is the definition given to the distribution of velocity in the axial direction over the cross-section of the pipe. This distribution is not usually flat and can vary dramatically depending on the properties of the fluid and the configuration of the pipe in which it flows. Fully developed flow is well defined for most values of Reynolds number however distorted flow is not. Ultrasonic flowmeters are affected by such distortions in the flow profile often resulting in erroneous measurements. For this reason correction to or prediction of distorted profiles has sparked great interest in the design and application of ultrasonic flowmeters. Multipath ultrasonic flowmeters are widely used in industry and many utilise a bouncepath technique. This document describes an analysis of the effect of theoretical asymmetric flow profiles on four transit time ultrasonic configurations utilising no more than two paths.

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