The last ten years have seen an increasing use of Coriolis flowmeters
in the measurement of small flows of liquids. The performance of Corio
lis meters under pulsating flow conditions was not well known, however
. This paper presents some investigations on such flowmeters in the pr
esence of monofrequent and polyfrequent pulsating flows. The linearity
of the flow characteristics is checked mathematically and the mechani
cal resonances of the measuring tubes are determined. Two U-tube type
Coriolis meters are tested and the measuring error resulting from the
pulsation of the flow is examined. The investigations are carried out
with monofrequent pulsation by a special test rig flow and with geared
and piston type pumps (polyfrequent excitation).