Summary Report of NIST's Industry-Government Consortium Research Program on Flowmeter Installation Effects with Emphasis on the Research Period, January-September 1991: The Reducer

摘要

This report presents recent results obtained in a consortium-sponsored research program on flowmeter installation effects being conducted at NIST-Gaithersburg, MD. The objective of this research program is to produce improved flowmeter performance when meters are installed in non-ideal conditions. Ideal meter installation conditions are those where long straight lengths of constant diameter piping precede the meter locations. Actual installations seldom conform to these conditions. This research effort has also included experimental studies of the flow into and out of several tube bundle flow conditioners. These results have produced, for the first time, detailed descriptions of the effects these devices have on swirling pipe flows. Specifically, this report contains measurements of the pipeflows produced downstream of the conventional reducer. Results are given for the performance characteristics of a range of orifice meter geometries and a specific turbine meter in these pipe flows. Also included are the velocity profile measurements downstream of the tee used as an elbow and several arrangements of tube bundles installed downstream of the single elbow and the tee used as an elbow.