Venturi-Tube Performance In Wet Gas Using Different

摘要

Three 4-inch Venturi tubes have been tested in the NEL wet-gas test facility using three gas-liquid combinations: nitrogen-kerosene, argon-kerosene and nitrogen-water. Two gas-liquid density ratios were used for the tests with a gas densimetric Froude number range of 1.5 to 4.5, and a Lockhart-Martinelli parameter range of 0 to 0.3.rnThe alternative gas tests indicated a very small effect on the Venturi-tube performance, especially for the Venturi tube with convergent angle 10.5°. Using an alternative liquid, however, indicated a change in performance significant enough to produce large errors if not accounted for in a practical installation.rnFitting the experimental data obtained during the test programme using the Chisholm/de Leeuw model produced less than optimal Venturi-tube over-reading predictions, with relative errors in the range -4% to +3%. Consequently a modified model was developed which improved the representation of the experimental data to within ± 2% for more than 95% of test data points.