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Title: Comparison Of Computation And Ldv Measurement Of Flow Through Orifice And Perforated Plates, And Computation Of The Effect Of Rough Pipework On Orifice Plates
Author: Michael J. Reader-Harris, William Keegans
Source: 1986 International Symposium on Fluid Flow Measurement
Year Published: 1986
Abstract: This paper presents work on the effect on orifice plates of two upstream flow conditions. The first half of the paper examines the effect of rough pipework on the discharge coefficients of orifice plates over a range of Reynolds numbers and shows that the change in discharge coefficient is approximately proportional to the change in friction factor. The advantage in having a few diameters of smooth pipe immediately upstream of the orifice is shown. The second half of the paper presents measurements made using laser Doppler veloclmetry (LDV) In a rig comprising two bends in perpendicular planes, a perforated plate flow straightener and an orifice plate, together with computational comparison.

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