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Title: Error Estimation In A Turbine Flowmeter Under Insufficient Straight Sections Of Pipe
Author: Josefina Ortiz m., Francisco Ramirez N., Edmundo Pedroza G.
Source: 2006 International Symposium on Fluid Flow Measurement
Year Published: 2006
Abstract: In agricultural pumping plants flowmeters can be installed with insufficient straight sections of pipe, both upstream and downstream from the meter. It has been found that flowmeter manufacturers are not aware of the error rate even though they know the correct position. In 1998, Hanson and Schwankl found that a propeller flowmeter had an error of 3.5% when it was installed a distance of two pipe diameters downstream from an elbow. The present study investigated the performance of a turbine flowmeter under non-optimal conditions (not considered by Hanson and Schwankl). Measurements were made in different flowmeter positions at various flow rates. Results from this project show that in any case the flowmeter doesnt have a large error rate. However, the lowest error rate is obtained when it is installed in the position recommended by the manufacturer.

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