An adaptive calibration circuit for flow measurement using venturi
When Venturi meters are used in wet gas the measured differential pressure is higher than it would be were the gas phases flowing alone. This phenomenon is called over reading, This paper proposed a new Venturi wet gas correlation based on homogenous and separated assumption, and its validity is verified through experiment. a new test program has been implemented in Tianjin University's Low Pressure Wet Gas Loop. Three 50mm Venturi meters, with β values of 0.4048, 0.55 and 0.70 have been tested at the working operation pressure of 0.15, 0.20 and 0.25 MPa, and the gas densiometric Froude number from 0.6 to 2.5, the modified Lockhart-Maretinelli parameter from 0.0022 to 0.3, and the ratio of the gas liquid mass flow rate from 0.5 to 0.99. Finally, the performance of the new proposed correlations is compared with the old eight correlations.