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Title: Pulsation - Eliminate Or Live With It
Author: Walter Nimitz
Source: 1968 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1968
Abstract: Flow measurements under pulsative flow conditions have been a subject of extensive research and experimental studies for manyyears. While many of these efforts have added to the state of the art there is yet no complete solution available. It is important, therefore, to review the basic types of pulsation induced errors and restate the basic problem in order to understand when and what kind of solutions are possible. Fundamentally, orifice flow measurement is indirect that is, flow velocity is computed from differential pressure measurements at the orifice. Unfortunately, under pulsative flow conditions, the relation between differential orifice pressure and velocity is complex and may become undetermined (Fig. 1), in which case the pulsation induced error cannot be calculated. As shown elsewhere there are three types of pulsation induced errors in orifice measurement of compressible fluid as summarized below:

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