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RESEARCH PAPERS

The Effect of Edge Sharpness on the Discharge Coefficient of an Orifice

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

Westinghouse Electric Corp., Lester, Pa.

J. Eng. Power 97(4), 576-581 (Oct 01, 1975) (6 pages) doi:10.1115/1.3446067 History: Received July 07, 1974; Online July 14, 2010

Abstract

The effect of inlet edge roundness on the discharge coefficient of an orifice plate is studied experimentally. Several methods for measuring edge roundness are discussed and applied. An optical method in particular is shown to provide reliable measurements of edge roundness. Flow results are summarized in terms of radius of curvature by the empirical equation ΔCD /CD = 0.85 ln (rk /d × 103 ) + 1.74.

Copyright © 1975 by ASME
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