The slotted-orifice is a new type of flow sensor for gas-liquid two-phase flow measurement,and there is no correlation of two-phase multipliers for the slotted-orifice available.Based on the air-water two-phase flow experimental data of slotted-orifice,five typical correlations of the standard throttle device were applied to the data,and the application range and the reason for error involved from these correlations were analyzed.Based on different modeling ideas,three new correlations,which include the Lockhart-Martinelli parameter,gas pressure and gas Froude number,were proposed and used in the study of metering technology of wet gas flow.The accuracy of new correlations can meet the gas industry demands for production based metering.
