Gas-liquid two-phase flow is common in hilly terrain pipelines.A combined model is proposed to model the slug initiation,capture the development of slug and calculate hydraulic parameters.Slip velocity equation and liquid mass conservation equation are the basement of the model.A moving reference frame was Build up to solve the liquid mass conservation equation.Model slug initiation and development through the change of holdup.Combined with pressure drop calculation correlations and the influence of hilly terrain are hydraulic parameters calculated.Experimental date and field data(Daqing) were used to verify the model.Analysis results show that:The relative errors of most pressure drop calculated with this model were within ± 17％,the relative errors of most liquid loading calculated with this model were within ± 11％,the accuracy of this model is fine.%针对管路气液两相流,建立了一种捕获段塞流的形成和发展过程;并进行气液两相流水力计算的组合模型.以滑移速度和液相连续性方程为基础,通过建立动坐标系来求解液相连续性方程,得到以持液率的变化来反映段塞的形成和发展.加入地形起伏的影响和压降计算关系式,对气液混输管路进行水力计算.分别使用实验数据和工程现场数据来验证模型的准确性.实验数据分别来自于实验环道和大庆油田现场数据.结果显示:模型计算大部分压降误差在±17％以内,大部分积液量误差在±11％以内,具有较好的精度.
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