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Title: Response Of A Slotted Orifice Flowmeter To An AIR/WATER Mixture
Author: Gerald L. Morrison, K. R. Hall
Source: 1999 International Symposium on Fluid Flow Measurement
Year Published: 1999
Abstract: The ability of a flow meter to respond predictably to the presence of liquid and gas is important to the natural gas industry and to users of steam. In both cases, the gas can become saturated and some liquids can condense in the line. The response of orifice flow meters to the presence of liquids is erratic and produces considerable uncertainty. Turbine flow meters can sustain severe damage when subjected to two phase flow. The slotted orifice flow meter (Morrison, et al.1) has been developed to address the problem of upstream flow conditioning. This device has been shown to be insensitive to the upstream velocity profile. To further evaluate the flow meter for use by the natural gas industry, the effects of adding liquid to a gas flow upon the meter performance has been investigated by subjecting a slotted orifice flowmeter with an equivalent ratio of 0.50 to a two phase flow consisting of air and water.

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