天然气携砂在90°弯管中的冲蚀磨损数值分析  

Numerical Analysis of Erosion Wear of Natural Gas Carrying Sand in 90°Elbow Pipe

作　　者：史晶莹 陈燕才 蔡晓明 高翔 徐恒元 梁昌晶 SHI Jingying;CHEN Yancai;CAI Xiaoming;GAO Xiang;XU Hengyuan;LIANG Changjing(Daqing Oilfield Design Institute Co.,Ltd.;Hebei Huabei Petroleum Engineering Construction Co.,Ltd.;NO.4 Drilling Engineering Branch Company,Bohai Drilling Company;Hebei Huabei Petroleum GangHua Survey Planning&Design Co.,Ltd.)

机构地区：[1]大庆油田设计院有限公司 [2]河北华北石油工程建设有限公司 [3]渤海钻探第四钻井工程分公司 [4]河北华北石油港华勘察规划设计有限公司

出　　处：《油气田地面工程》2021年第5期6-11,共6页Oil-Gas Field Surface Engineering

摘　　要：针对天然气携砂弯管冲蚀问题,利用Fluent流体仿真软件进行气-固双相耦合,选用标准k-epsilon湍流模型、E/CRC冲蚀模型对固体颗粒的流场分布、冲蚀速率及冲蚀位置进行模拟,并针对4种不同重力场的流动特性进行分析。结果表明:颗粒质量流量较小时,冲蚀速率随流速呈线性变化,颗粒质量流量较大时,冲蚀速率随流速呈指数变化;冲蚀速率随颗粒直径的增大,呈现先增大后保持平稳趋势;最大冲蚀位置随流速的增加向后移动,随颗粒直径的增大略微向前移动;与重力方向相同的入口或出口位置,冲蚀较严重,和重力方向相同且二次流经过的位置,冲蚀现象最为严重。以上研究结果可为预防管道冲蚀提供理论依据和实际参考。In order to solve the erosion problem of natural gas sand-carrying elbow,Fluent fluid simulation software is used to carry out gas-solid two-phase coupling.Standard k-epsilon turbulence model and E/CRC erosion model are used to simulate the flow field distribution,erosion rate and erosion position of solid particles,and the flow characteristics of four different gravity fields are analyzed.The results show that the erosion rate varies linearly with the flow rate when the mass flow rate is small,whereas it varies exponentially with the flow rate when the mass flow rate is large.With the increase of particle diameter,the erosion rate first increased and then remained stable.The maximum erosion position moves forward with the increase of velocity and moves back slightly with the increase of particle diameter.When the inlet or outlet position in the same direction as the gravity,the erosion is more serious.The most serious erosion is at the position that in the same direction as the gravity and secondary flow passes through.The research results can provide theoretical basis and practical reference for the prevention of pipeline erosion.

关 键 词：弯管 冲蚀 FLUENT 质量流量 流速 颗粒直径 重力场 

分 类 号：TE980[石油与天然气工程—石油机械设备]