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http://dx.doi.org/10.3795/KSME-B.2012.36.8.877

Characteristics of Multipath Ultrasonic Flowmeter Installed Upstream and Downstream of Flow Disturbance Factors-Contraction, Expansion, and Tee Pipe  

Lee, Dong-Keun (K-water Institute, Korea Water Resources Corporation)
Cho, Yong (K-water Institute, Korea Water Resources Corporation)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.8, 2012 , pp. 877-883 More about this Journal
Abstract
Multipath ultrasonic flowmeters are increasingly being used for the purpose of accurate flow measurement. However, an installation standard has not yet been established for these flowmeters, and this can cause considerable confusion during field installation. There is a need for a minimum straight run to ensure the measurement accuracy of a flowmeter installed upstream and downstream of flow disturbance factors-expansion, contraction, and tee pipes. Experiments were performed by using multipath flowmeters that have less than ${\pm}0.5%$ accuracy-4-paths 1-unit and 2-paths 1-unit are of foreign make, whereas 5-paths 2-units are of domestic make-to determine the straight run under the above conditions. We carried out experiments repeatedly by considering a straight run, velocity, and suggested installation standards for a multipath ultrasonic flowmeter that satisfies the tolerance limits.
Keywords
Multipath Flowmeter; Contraction Pipe; Expansion Pipe; Tee Pipe; Straight Run; Flow Disturbance Factor;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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2 ISO 4185, 1980, "Measurement of Liquid Flow in Closed Conduits - Weighing Method."
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8 Lee, D. K and Cho, Y., 2011, "Error Characteristics of Clamp-on Ultrasonic Flowmeters Depending on Location of Sensors and Downstream Straight Run of Bent Pipe," Trans. of the KSME(B), Vol. 35, No. 8, pp. 861-868.   과학기술학회마을   DOI   ScienceOn