水平管油水两相流研究进展

Research progress in oil-water two-phase flow in horizontal pipeline

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 domestic and international research situation and developing direction of the oil-water two-phase flow patterns in horizontal pipeline have been summarized. The flow patterns have been divided into stratif ied flow and dispersed flow. A further subdividing is as followed:smooth stratif ied flow,wavy stratified flow,wavy stratifi ed flow with liquid droplet layer,oil droplet dispersion layer-water stratified flow,water droplet dispersion layer-oil stratified flow,water-in-oil dispersed flow and oil-in-water dispersed flow. The major factors affected the flow patterns and pressure drop have been analyzed,including pipe wall materials,entrance shapes,and physical properties of oil and so on. The conversed conditions of flow pattern from stratif ied flow to semi-dispersed flow have been determined by analyzing interface stability. And the conversed conditions of flow pattern to fully dispersed flow have been determined by comparing the maximum droplet size with the critical droplet size. Also,the stratifi ed pipe-flow theoretical solution and the conventional mathematical models of stratifi ed flow in bipolar coordinates are introduced such as double-layer fluid model,the improved three-layer flow model and four-layer fluid model.