B. Horner et al., A MULTISENSOR INDUCTION FLOWMETER REDUCING ERRORS DUE TO NON-AXISYMMETRICAL FLOW PROFILES, Measurement science & technology, 7(3), 1996, pp. 354-360
The measurement of volume or mass flow through pipes is generally-with
almost all types of flowmeters-affected by the flow profile, that is
the distribution of fluid velocity over the pipe cross section. To ens
ure a well-defined flow profile, the flowmeter must be placed sufficie
ntly distant from distorting installations like bends or valves, which
increases the installation cost or is even impossible in many applica
tions. With induction flowmeters, the accuracy is independent of the f
low profile in the radial direction, but it is influenced by profiles
deviating from axial symmetry. In this paper, a novel method for reduc
ing this error is discussed. The method is based on tomographic princi
ples using multiple electrode pairs and two magnetic field components.
The pertinent theory is developed, and experimental results are prese
nted.