关键词: 油水两相管流, 管壁剪切应力, 管流扰动动能, 液液分散系统, 分散液滴, 计算模型, 反相含水率, 预测模型

Abstract: The turbulent kinetic energy was estimated by use of the shear stress on the wall of pipe,and a simplified model for calculating the size of liquid drop in liquid-liquid dispersion was developed on the basis of a balance between the turbulent kinetic energy of the liquid phase and the surface energy of dispersed liquid drops.The criterion of the minimum free energy was combined with the drop size model to predict the critical water fraction for phase inversion.The experimental data from the available literatures were used to validate the improved phase inversion model and other models proposed by Yeh,et al.The results show that the precision of the improved model is prior to any others when the oil viscosity is below 100 mPa·s.The existing phase inversion models are unfavorable to predict the critical water fraction when the viscosity of oil product is high.

Key words: oil-water two phase pipeline flow, shear stress on tube wall, turbulent kinetic energy, liquid-liquid dispersion system, dispersed liquid drop, calculation model, phase inversion water fraction, prediction model