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Title: Flow Measurement By Vortex Shedding
Author: Alan E. Rodely
Source: 1974 International School of Hydrocarbon Measurement
Year Published: 1974
Abstract: The majority of hydrocarbon flow measurements are made by sensing either the pressure d i f f e r ential across an obstruction placed in the pipeline or the rotation of a mechanical device. The o r i f i ce plate is the principal example of d i f f e r ential head instruments while rotating devices are exemplified by various designs of positive displacement, turbine and rotary meters. Although continued engineering development, particularly of secondary sensing and readout equipment has significantly added to the usefulness of instruments of both types, the fundamental characteri s t i c s of these primary elements remains the same.

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