Abstract:
The response of an Electromagnetic Flowmeter to a secondary, nonconducting
phase in a continuous conducting phase is investigated. Experiments are carried
out on a commercial 2" Foxboro flowmeter with sinusoidal mains field
excitation and point electrodes. The main aspects which are looked for are the
change in flow signal and transformer signal. A mathematical model is
developed to simulate the effect of the nonconducting phase in. the form of
single spherical particles. The model also allows one to alter the electrode
geometry. A second flowmeter is designed to incorporate an improved
electrode and coil geometry as well as a newly designed signal processing unit.
In a series of experiments, the predictions of the theoretical model have been
mostly verified.