摘要
为研究集输管道弯管应力集中区域的冲蚀现象,以30°弯管为例,先运用应力分析软件探求弯管应力集中区域;再运用CFD软件对应力集中处的冲蚀现象进行仿真模拟,通过改变入口流速、颗粒的粒径及质量流率,分析冲蚀速率的变动规律。结果表明:弯管应力主要集中在拐角处,且应力集中处的冲蚀区域呈"O"型分布;随入口流速、颗粒粒径及颗粒质量流率的增加,冲蚀速率均呈递增趋势,但不同粒径范围,其增加的速度并不相同,且颗粒质量流率的影响程度要略大于入流流速;弯管拐角外壁面同时承载压力、应力及冲蚀作用,而拐角内侧壁面压力及冲蚀均较低,因此拐角外壁面的破坏概率远大于内壁面,加强拐角外壁面的防护尤为重要。
In order to study the erosion phenomenon in the stress concentration area of the gas pipe,taking 30°elbow as an example,the stress analysis software was used to explore the stress concentration area of the elbow.Then the CFD software was used to simulate the erosion phenomenon in the stress concentration area.By changing the inlet flow rate,particle size and mass flow rate,the variation law of erosion rate was analyzed.The results showed that the stress of the elbow was mainly concentrated at the corner,and the erosion area at the stress concentration was"O"-type distribution.With the increase of inlet flow velocity,particle size and particle mass flow rate,the erosion rate increased.However,the increasing speed of different particle size ranges was not the same,and the influence of particle mass flow rate was slightly larger than the inflow flow rate;the outer wall surface of the elbow corner carried both pressure,stress and erosion,while the inner wall surface pressure and erosion of the corner were lower,so the damage probability of the outer wall surface of the corner was much larger than that of the inner wall surface.It is especially important to strengthen the protection of the outer wall surface of the corner.
作者
王博
徐鑫
王卫强
WANG Bo;XU Xin;WANG Wei-qiang(College of Petroleum and Natural Gas Engineering,Liaoning Shihua University,Liaoning Fushun 113001,China)
出处
《当代化工》
CAS
2020年第4期680-683,共4页
Contemporary Chemical Industry
基金
辽宁省自然科学基金指导计划项目(20180550745)
关键词
集输管道
弯管
流固耦合
应力分析
冲蚀磨损
Gas collecting pipe
Elbow
Fluid-solid coupling
Stress analysis
Erosion wear
作者简介
王博(1994-),男,辽宁鞍山人,硕士研究生,研究方向:长输管道数值模拟。E-mail:bobaocomeon@163.com;通讯作者:王卫强(1974-),男,教授,博士,研究方向:长输管道数值模拟及微生物实验研究。E-mail:25457323188@163.com
