Mass Flow Measurement of Oil-Water Two-Phase Flow Based on Coriolis Flow Meter and SVM
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In order to overcome the difficulties in measuring the flow rate of oil-water two-phase flow, the measurements of total mass flow rate, respective mass flow rate and real density of oil-water mixture with a double-U Coriolis flow meter were investigated. Based on the oil-water flow rate and density obtained with a double-U Coriolis flow meter, and by the help of Support Vector Machine (SVM), a direct prediction method of the oil-water respective mass flow rate was developed to avoid the need of study on the complex relation between the slip velocity, water hold up and water fraction. The experimental research on the oil-water two phase flow measurement was carried out in a 25 mm diameter pipe with the water flow rate in the range from 0.2 m3·h-1 to 7 m3·h-1, oil flow rate from 0.27 m3·h-1 to 5 m3·h-1 and water fraction from 5% to 95%. Experimental results show that, using the proposed prediction method, the Coriolis flow meter could make direct measurement of total mass flow rate of oil-water two-phase flow with high accuracy, and the relative error of total mass flow rate is within ±1% while that of respective mass flow rate is within ±8%.