Abstract: In gas-liquid flow,slug flow can be related to other flow patterns,if the hydrodynamic model is developed from slug flow,models of different flow patterns can be unified.Momentum and continuity equations were developed based on slug flow,and simulation of bubble and droplet entrainment was optimized.For the important parameters(wall and interfacial friction factors,slug translational velocity and average slug length),the correlations of these parameters were optimized.Meanwhile,occurrence conditions and correlations of related parameters for liquid droplets and gas bubbles entrainment were given.Finally,a unified model based on slug flow for gas-liquid flow was developed.Experimental data from different sources were used to verify the model.The data with various flow patterns were taken from China University of Petroleum(East China),Daqing Oilfield and foreign researchers.The accuracy of this model was higher than the original model without improvement and optimization of correlations.The relative errors of most pressure drop and holdup data calculated with this model were within ±15%.

Key words: gas-liquid flow, calculation model, slug flow

摘要： 气液两相混输流动中,由于段塞流与其他流型均有联系,从段塞流出发建立模型可以使不同流型下的计算模型得到统一。基于段塞流建立气液两相流动量方程和连续性方程,完善模型对气泡和液滴夹带的处理。建立模型的闭合关系式,对关键参数(壁面及气液相间水力摩阻系数、液塞平移速度、平均液塞长度)的计算闭合关系式进行优选,得到适用于模型的闭合关系式,同时,对液滴和气泡的夹带给出夹带条件及相关参数计算式,最终建立基于段塞流的通用气液两相流模型。使用3组不同来源的实验数据验证了模型计算压降和持液率的准确性,实验数据分别来自中国石油大学(华东)、大庆油田实验基地的气液两相流实验以及国外研究人员的实验研究,包含各个气液流型。模型具有较高的计算精度,优于未经关系式完善和优化的原始模型,大部分压降及持液率参数的计算误差在±15%以内。

关键词: 气液两相流, 计算模型, 段塞流