In this study

by using the two-phase hydrokinetic theory

a theoretical model for gas-liquid annular and stratified flows through a horizontal Venturi meter was developed. The momentum equation for the gas phase was solved in the axial direction

by considering the factors including void fraction

friction between two phases and entrainment of droplets in the gas core. By modifying the void fraction model proposed by Lockhart and Martinelli

a void fraction model for the convergent tube was developed. Using the modified void fraction model

the distribution of wet gas static pressure between two pressure tappings of the venture meter was simulated. For the sake of checking the validity of this model

wet gas flow experiments were performed by using the standard venture meters with diameter ratio of 0.55 and 0.4 in the flow laboratory of Tianjin University. The predicted points of the modified model were within error band of ±15%. As the model was developed more based on dynamics characteristics of wet gas flow

it could form the basis for further establishing a general flow measurement model of wet gas.