Prediction Model of Critical Liquid-Carrying Flow Velocity of Micro-tilt Pipeline under Droplet Entrainment in X Gas Field

Abstract

A prediction model of critical liquid-carrying flow rate of gas-liquid two-phase flow considering the influence of droplet carrying was established. Combined with the dynamic equilibrium and the Banafi-Talaie boundary equation, the calculation method of gas/liquid/wall shear stress was improved. Compared with the four classical fully enclosed models, namely FLAT, ARS, Double rings and MARS, the experimental test data of the air-water and air-60% glycerol liquid systems show that the critical liquid-carrying flow rate obtained by the model established in this paper deviates from the experimental data by ≤1%. For highly viscous liquids, the model established in this paper can obtain the highest critical liquid holding ratio. It can help to make up for the shortcomings of the original model that cannot deal with high-viscosity liquids, and can provide a theoretical basis for the safety of long-distance natural gas pipelines.