The influence of upstream non-normal velocity distributions on orifice meters is studied experimentally. Several parameters, based on the velocity distribution, were found to correlate with the discharge coefficient. A pressure index, based on wall-pressure measurements, was also shown to correlate with the discharge coefficient. An examination of a proposed prediction method using the pressure index, showed that it appears possible to predict the performance of orifice meters when the approach profiles are non-normal.
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Research Papers
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