摘要
冲蚀是造成管壁减薄和穿孔的重要原因之一,为此采用FLUENT软件建立了气固两相流管道冲蚀模型。通过模拟计算,明确了气固两相流管道受冲蚀最严重部位,分析了气固两相流管道最大冲蚀率和颗粒沉积密度随气体流量、固体量和压力的变化规律,并针对管道冲蚀最严重部位提出了结构优化措施。结果表明:1)阀后弯管是冲蚀最严重部位。2)最大冲蚀率和颗粒沉积密度随气体流量、固体量和调节阀开度的变化规律分别是,随着气体流量增加,最大冲蚀速率增大,颗粒沉积密度减小;随着压力升高,最大冲蚀速率减小,颗粒沉积密度增大;随着固体量增加,最大冲蚀速率增大,颗粒沉积密度增大。3)将阀后弯管改为盲三通结构可有效降低管道冲蚀率。
Erosion is one of the important reasons for the thinning and perforation of pipeline wall.For this reason,it builds gas-solid two phase flow pipe erosion model,shows that the worst areas affected by erosion are clear,obtains the rule of the corrosion rate and the particle deposition density with gas flow rate,solid content and pressure.It introduces the structural optimization measures,shows that：1.the bend back of control valve is the most serious erosion areas;2.the rule of the corrosion rate and the particle deposition density are that：with the increase of gas flow,the maximum erosion rate increases,and the particle deposition density decreases;with pressurizing,the maximum erosion rate decreases,and the particle deposition density increases;with the increase of solid content,the maximum erosion rate increases,and the particle deposition density increases;3.changing the bend back of the valve into a blind three-way mechanism can effectively reduce the pipeline erosion rate.
作者
曹辉祥
陈小榆
徐婧源
Cao Huixiang;Chen Xiaoyu;Xu Jingyuan(School of petroleum engineering,Southwest Petroleum University,Sichuan Chengdu,610500,China;Gas Management Office,China Southwest Oil and Gas Field Tranch,Sichuan Chengdu,610213,China)
出处
《机械设计与制造工程》
2018年第8期91-96,共6页
Machine Design and Manufacturing Engineering
关键词
气固两相流
冲蚀
最大冲蚀率
颗粒沉积密度
变化规律
结构优化
gas -solid two phase flow
erosion
maximum erosion rate
particle deposition density
change rule
structural optimization
