A new method to meter wet gas flow based on double differential pressure

In this paper, a new method to meter wet gas flow based on double differential pressure is developed. The two phase flow coefficient of the V-Cone meter is proposed. The effects of the Lockhart-Martinelli parameter, the gas densiometric Froude number and the operating pressure on the two-phase flow coefficient are experimentally investigated. On the basis of the two-phase flow coefficient the wet gas model is finally developed. The V-Cone meter and the Shuttle-Cone meter are used in series owing to the differences between them when they measure the wet gas; then the differences between the two meters and the Lockhart-Martinelli parameter are obtained. The experiment pressure ranges from 0.20 MPa to 0.48 MPa, the gas densiometric Froude number ranges from 0.37 to 1.70, and the gas mass fraction ranges from 28% to 100%. Under the present test conditions, the mean relative error of the gas mass flow rate predicted by the model is within 2.0%; the full scale relative error of the liquid mass flow rate is less than ±20%.