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Title: Self-Acting Velocity Profile Device For Natural Gas Under Pressure
Author: D. King
Source: 1995 International Symposium on Fluid Flow Measurement
Year Published: 1995
Abstract: Accuracy of flowmeters is strongly linked to installation conditions. These installation conditions disturb the flow entering the meters, and hence influence their answers. To know the flow characteristics there is a need to measure the velocity profile. Therefore GDF developped a special device, quick, self-acting, operating in natural gas under pressure from some millibar up to 50 bar. These developpments and profiles measurements have been performed on the GDF natural gas flow metering facilities. Since GDF had this device, GDF had led many studies on installation conditions to improve the knowledge of meter behaviour under disturbed flows. In this paper the general principles of this device are presented and examples of flow profiles given.