A Generalized Discharge Coefficient for Differential Pressure Type Fluid Meters

[+] Author and Article Information
R. P. Benedict, J. S. Wyler

Steam Turbine Division Engineering, Westinghouse Electric Corp., Lester, Pa.

J. Eng. Power 96(4), 440-448 (Oct 01, 1974) (9 pages) doi:10.1115/1.3445873 History: Received July 30, 1973; Online July 14, 2010


A generalized rational equation is derived for the discharge coefficient of differential pressure-type fluid meters. Its factors are particularized for throat tap meters, pipe wall tap nozzles, and for orifice-type flow meters. Comparisons are made with available theories and with current Fluid Meter practices, and these support the new formulation. Because of its rational basis, the generalized equation may be useful for extrapolations to Reynolds numbers which lie beyond the capabilities of calibration laboratories.

Copyright © 1974 by ASME
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