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Title: CFD Analysis For Ultrasonic Flow Meter Accuracy Improvement In Flare Gas Applications
Author: Isaac Sadovnik Jed Matson Selvakumaran Senthamizhchai Venugopal Arumuru Lei Sui
Source: 2015 International Symposium on Fluid Flow Measurement
Year Published: 2015
Abstract: Ultrasonic Flow Meters (USM) rely on Fully Developed flow profile (FD) for the accurate measurement of flow rate in Flare Gas or, in general, for any application. T he US M are loaded with meter factors or K - factors which correspond to the conversion from the measured Ultrasonic Path Line velocity average, to the flow cross - section area average velocity which is the Bulk velocity of the flow. In o rder to produce a suitable FD flow profile prior to entering the flow meter, one may need to have a length of straight pipe upwards of 50 pipe diameters. Most Flare Gas Flow Meter installations dont typically have this kind of length of straight pipe upst ream of their installation locations. As a result, the meters will read bulk flow velocities that can be inaccurate by typically 5 - 10% of reading . CFD Analysis can improve the meters accuracy by predicting the flow profiles for a particular installation and thus providing the meter with more accurate correction factors or, Meter Factors (MF). The meter fa ctors that CFD analyses provides , are decomposed into two separate factors: the fully developed flow meter factor (FDMF) and the meter correction factor (MCF) that is multiplied to the FDMF in order to obtain the final Correction F actor s (Installed Correction Factors) to be loaded into the meters software

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