下倾管-立管水气严重段塞流数值模拟  

NUMERICAL SIMULATION OF THE SEVERE SLUG FLOW BETWEEN WATER-AIR PHASES IN A DECLINATION PIPE-RISER

作　　者：高嵩[1] 尤云祥[1] 李巍[1] 胡天群[1] 俞忠[1] 

机构地区：[1]上海交通大学,海洋工程国家重点实验室,上海200240

出　　处：《力学学报》2011年第3期468-475,共8页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家高技术研究发展计划资助项目(2008AA09Z316,2008AA09Z313)~~

摘　　要：针对海洋油气传输中常见的下倾管-立管系统,采用Brackbill模型模拟气液相界面间表面张力,VOF方法追踪气液两相运动界面,提出了管内气液两相流数值模拟方法.在低气液相进口折算速度下,数值模拟了该种管型下的严重段塞流动现象,分析了相关物理参数的变化特性.结果表明,在严重段塞流下,管内流型流态、压力、液塞运动速度、立管出口气液相平均速度、下倾管及立管内含气率等均具有明显周期性特征,而且一个周期内严重段塞流可分为4个阶段,进而给出了各阶段中相关参数的变化特性.数值模拟结果与相关文献中的实验结果吻合良好,表明了该数值模拟方法的有效性.In the present paper,a numerical method for simulating the characteristics of two-phase flows in a declination pipe-riser system with the gas and fluid was developed.The Brackbill model was applied to simulate surface tension between two phases and the VOF method was used to capture the moving interfaces between gas-liquid phases.At low superfical velocity of gas and hquid superficial velocities,severe slug flows in such a pipe-riser system were simulated and the variety characteristics for flow parameters were analyzed.The results show that the flow parameter characteristics due to such a severe slug flow have remarkably periodic characteristics,including the flow pattern,pressure,slug velocity,average phase velocity at the riser outlet and gas volume fraction,and severe slug flow in a period consists of four evolvement stages where the characteristics of such flow parameters in each evolvement stage were further given.The numerical results are good agreements with experimental results reported in the references,showing that the proposed method is effective.

关 键 词：下倾管-立管 数值模拟 严重段塞流 流动特性 含气率 

分 类 号：O359.1[理学—流体力学]