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The Effect of Contaminated Orifice Plates on the Discharge Coefficient - Dr. M J Reader-Harris, Dr. D Hodges, TUV NEL

Contamination to orifice plates was simulated by sticking circular metal discs of defined thickness and radius to the plates so as to leave an untouched region in the neighbourhood of the sharp edge. This simulates the cleaned region often observed on contaminated plates. The effect of this contamination has been measured in nitrogen at 63 bar absolute and an equation for the effect of this contamination determined with an uncertainty of 0.28 %. The effect of contamination has also been calculated using CFD, and good agreement between CFD and experiment obtained.

Published: September 01 2008
Authors: TUV NEL
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