弯管冲蚀失效模拟研究及影响因素分析
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摘要
针对流体输送管道中存在的失效问题,介绍了冲刷腐蚀对工业领域的危害,分析了冲刷腐蚀影响因素。建立了弯管流固耦合模型,采用计算流体力学(CFD),借助ANSYS分析软件和DPM离散相模型,利用数值模拟方法求得固体颗粒运动轨迹,结合颗粒碰撞模型得到颗粒运动对管壁的冲蚀作用,判定弯管冲蚀破坏的危险区域和失效形式,讨论不同工况下,弯管结构参数和介质流动情况对冲蚀失效的影响。
In view of the failure problem in the fluid transportation pipeline, the harm of scour corrosion to the industrial field is introduced, and the influencing factors of scour corrosion are analyzed. Bend of fluid-solid coupling model is established, using the computational fluid dynamics(CFD), with the help of ANSYS analysis software and DPM discrete phase model, solid particle trajectories are obtained by using numerical simulation method. Combining particle collision model, the erosion effect of particle motion on pipe wall is obtained,the dangerous area and failure mode of band erosion are determined.The influence of bend structure parameters and medium flow on erosion failure under different working conditions are discussed.
In view of the failure problem in the fluid transportation pipeline, the harm of scour corrosion to the industrial field is introduced, and the influencing factors of scour corrosion are analyzed. Bend of fluid-solid coupling model is established, using the computational fluid dynamics(CFD), with the help of ANSYS analysis software and DPM discrete phase model, solid particle trajectories are obtained by using numerical simulation method. Combining particle collision model, the erosion effect of particle motion on pipe wall is obtained,the dangerous area and failure mode of band erosion are determined.The influence of bend structure parameters and medium flow on erosion failure under different working conditions are discussed.
引文
[1] 代真,沈士明,丁国铨. 金属在固液两相流体中的冲刷腐蚀及其防护[J].腐蚀与防护, 2007, 28(2):86-89.
[2]朱娟, 张乔斌, 陈宇,等. 冲刷腐蚀的研究现状[J]. 中国腐蚀与防护学报, 2014, 34(3):199-210.
[3]偶国富, 许根富, 朱祖超,等. 弯管冲蚀失效流固耦合机理及数值模拟[J].机械工程学报, 2009, 45(11):125-130,138.
[4]American Petroleum Institute. Damage mechanisms affecting fixed equipment in the refining industry:API 571[S]. Washington:API Publications,2003.
[5]彭文山, 曹学文. 管道参数对液/固两相流弯管流场及冲蚀影响分析[J].中国腐蚀与防护学报, 2016,36(1):87-96.
[6]许根富, 王飞, 赵哲明,等. 石化压力管道冲蚀失效数值模拟及影响因素分析[J]. 中国安全生产科学技术, 2016, 12(4):143-147.
[7]SHAH S N, JAIN S. Coiled tubing erosion during hydraulic fracturing slurry flow [J].Wear,2008, 264: 279-290.
[8]彭文山, 曹学文. 固体颗粒对液/固两相流弯管冲蚀作用分析[J]. 中国腐蚀与防护学报, 2015, 35(6):556-562.
[2]朱娟, 张乔斌, 陈宇,等. 冲刷腐蚀的研究现状[J]. 中国腐蚀与防护学报, 2014, 34(3):199-210.
[3]偶国富, 许根富, 朱祖超,等. 弯管冲蚀失效流固耦合机理及数值模拟[J].机械工程学报, 2009, 45(11):125-130,138.
[4]American Petroleum Institute. Damage mechanisms affecting fixed equipment in the refining industry:API 571[S]. Washington:API Publications,2003.
[5]彭文山, 曹学文. 管道参数对液/固两相流弯管流场及冲蚀影响分析[J].中国腐蚀与防护学报, 2016,36(1):87-96.
[6]许根富, 王飞, 赵哲明,等. 石化压力管道冲蚀失效数值模拟及影响因素分析[J]. 中国安全生产科学技术, 2016, 12(4):143-147.
[7]SHAH S N, JAIN S. Coiled tubing erosion during hydraulic fracturing slurry flow [J].Wear,2008, 264: 279-290.
[8]彭文山, 曹学文. 固体颗粒对液/固两相流弯管冲蚀作用分析[J]. 中国腐蚀与防护学报, 2015, 35(6):556-562.