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总结了国内外水平管内油水两相流流型的研究现状和发展方向。将流型分为分层流和分散流两大类,并进一步细分为:光滑分层流、波浪分层流、带有液滴层的波浪分层流、油滴分散层-水层流、水滴分散层-油层流、油包水状分散流、水包油状分散流。分析了影响流型的主要因素,管壁材质、入口形状、油品物性都会对流型和管输压降等产生较大影响。通过界面稳定性分析确定了流型从分层流向半分散流的转换条件,通过对比液滴最大尺寸和液滴临界尺寸确定了流型向完全分散流过渡的条件。介绍了在双极坐标下推导的层流分层管流理论解和常用的分层流数学模型,包括双层流体模型及改进的三层流体模型和四层流体模型。
The research status and development of oil-water two-phase flow pattern in horizontal pipe at home and abroad are summarized. The flow pattern is divided into stratified flow and dispersed flow, and further subdivided into: smooth stratified flow, wave stratified flow, wave stratified flow with droplet layer, droplet dispersed layer - aqueous flow , A water droplet distribution layer-oil layer flow, a water-in-oil dispersion flow, and an oil-in-water dispersion flow. The main factors influencing the flow pattern are analyzed. The wall material, the shape of the inlet, and the properties of the oil product all have a great influence on the flow pattern and the pressure drop of the pipe. The condition of transition from stratified flow to semi-dispersive flow was determined by interfacial stability analysis. By comparing the maximum size of droplets and the critical droplet size, the conditions for the transition from flow mode to full dispersion flow were determined. The layered stratified flow theory derived from bipolar coordinates and the commonly used stratified flow mathematical model are introduced, including the two-layer fluid model, the improved three-layer fluid model and the four-layer fluid model.