摘要
油气开采及输运过程中管道中的砂粒侵蚀会导致严重设备故障,并可能限制生产效率,增加生产成本。因此,准确预测油气生产管道尤其是弯管处的砂粒冲蚀情况是降低管道失效的关键保障。本文基于CFD-DPM方法,通过计算油气连续相流场、管壁侵蚀率和颗粒轨迹,实现复杂结构弯管中含砂颗粒的侵蚀速率的准确预报。研究发现,随着串联弯头之间的连接长度增加,弯管平均冲蚀率整体呈下降趋势,而最大冲蚀率先增大后减小又逐步增大。未来在含砂多相流体输运管道的设计中,为降低壁面冲蚀磨损,串联弯管连接长度建议可选在(9~15)D范围内。本文通过对比单个弯管与多级串联弯管内液固两相流冲蚀特性的差异,为未来含砂多相流体输运管道的设计及腐蚀防护提供理论指导。
Severe sand erosion occurred in pipelines during oil and gas production and transportation lead to equipment failures,which may limit production efficiency and increase costs.Therefore,accurate prediction of sand erosion in oil and gas production pipelines,especially at elbows,is a key guarantee for reducing pipeline failure.The CFD-DPM coupling method was adopted in this paper to accurately predict the erosion rate of particles in the curved pipe with complex structures by calculating the continuous phase flow field of oil and gas,the erosion rate of the pipe wall and the particle trajectory.The results showed that with the increase of the connection length between the series elbows,the average erosion rate of the elbows generally showed a downward trend,while the maximum erosion first increased,then decreased and gradually increased again.To reduce wall erosion and wear,the connection length of series elbows is recommended to be selected in the range of 9~15 D in the pipeline design of a multiphase flow containing sand particles.By comparing the differences in the erosion characteristics of liquid-solid two-phase flow between a single elbow and multi-stage tandem elbows,theoretical guidance for the pipeline design and corrosion protection in multiphase fluid transport containing sand particles is presented in this paper.
作者
高凌霄
杨贺琦
李小平
敬登伟
马利静
GAO Ling-xiao;YANG He-qi;LI Xiao-ping;JING Deng-wei;MA Li-jing(CNOOC(Tianjin)Pipeline Engineering Technology Co.,Ltd.,Tianjin 300452,China;State Key Laboratory of Multiphase Flow in Power Engineering&International Research Center for Renewable Energy,Xi an Jiaotong University,Xi an 710049,China)
出处
《节能技术》
CAS
2022年第4期297-304,共8页
Energy Conservation Technology
基金
中海油能源发展重点攻关项目“海上油气管道含砂监测技术应用研究”(HFKJ-ZDGG-ZB202017)。
关键词
液固两相流
串联弯管
冲蚀特性
壁面磨损
CFD-DPM方法
liquid-solid two-phase flow
series-mounted elbows
erosion characteristics
wall wear
CFD-DPM coupling method
