水平圆管内油气两相流分层流向段塞流转变机理的实验研究

根据气液两相流一维波模型建立分层流向段塞流转变的判别准则,对水平管内气液两相流出现段塞流时的各相临界表观速度进行了理论预测,并对流型转变进行了分析.理论计算中,主要考虑了两相流体和管壁之间的摩擦和气液相界面之间的摩擦对流型转变的影响,并结合分层流理想化模型分析了发生流型转变时的临界参数.在内径分别为40 mm和50 mm的水平管道油气两相流实验系统中进行了流型转变实验,所获实验数据处理结果与理论计算结果进行了对比.对影响流型的管径、流速等因素的分析结果表明,该模型较好地预测管内分层流向段塞流的转变.

Experimental Study on the Stratified to Slug Flow Regime Transition Mechanism of Gas -Oil Two-Phase Flow in Horizontal Pipe

The theoretical relations used to predict transition from a stratified pattern to a slug pattern for gas-liquid flow in horizontal pipes were presented.These include one-dimensional wave model which contains less empiricism than the commonly used Taitel-Dukler model,and the ideal model for stratified flow.Superficial velocity of each phase,as the onset of slugging occurs,was predicted,and theoretical analysis was conducted on the stratified to slug flow regime transition.The friction effect,existing between fluid and pipe wall,and on the interface of two phases,is taken into account especially.Theoretical model was applied to the experiment about oil-gas two-phase flow in horizontal 40 mm and 50 mm pipes.The effect of pipe diameter on the transition was also investigated.The results show that the current model gives a reasonable prediction over the whole range of flow rates,and better agreement is achieved between the predicted and measured critical parameters.