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Title: Installation Effects And Flow Instabilities In Gas Metering Station With Multipath Ultrasonic Flow Meters
Author: Camilla Stre Kjell-Eivind Frysa Anders Hallanger Philip Chan
Source: 2015 North Sea Flow Measurement Workshop
Year Published: 2015
Abstract: The metering station consists of two parallel meter ing tubes, each equipped with a multipath ultrasonic flow meter with an upstream fl ow conditioner. The header upstream of the two metering tubes has T-bends at t he end sections. Through Computational Fluid Dynamics (CFD) it will be shown that the T-bends in the upstream header can cause severe distortions of the flow pro files, and that the positioning of the flow conditioners can be essential for preventing f low instabilities. It will be demonstrated that both the pipe geometry upstream t he inlet header and the geometry of the inlet header itself may affect the flow inst ability through the flow meters. The results will to a large extent explain the effects found in practie

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