摘要
高压弯管在压裂作业过程中,由于冲蚀磨损问题极易产生缺陷,缺陷又反过来影响管道内部流动,导致弯管的冲蚀特性发生改变。为此,根据弯管处冲蚀缺陷位置及类型,建立含冲蚀缺陷的高压弯管三维几何模型,运用Fluent软件对其进行冲蚀特性数值模拟,对比有、无缺陷时高压弯管冲蚀磨损情况,分析不同缺陷因素对冲蚀特性的影响。分析结果表明:无缺陷高压弯管冲蚀磨损较为严重的区域在弯头外侧处,此区域最大冲蚀率远大于入口与出口直管段区域;含缺陷高压弯管冲蚀磨损较为严重的区域在缺陷处,且含缺陷弯管最大冲蚀率约是无缺陷弯管的6倍;含缺陷高压弯管的最大冲蚀率随着缺陷长度的增大而增大,随着缺陷宽度的增大,最大冲蚀率减小;缺陷位置在弯头0°、15°和30°处的最大冲蚀率较大,45°、60°和75°处的最大冲蚀率较小且变化较为平稳。研究结果可为高压弯管冲蚀磨损的安全预警提供参考。
During fracturing operations,high-pressure elbows are prone to defects due to erosion wear,which in turn affects internal flow in pipelines,resulting in changes in the erosion characteristics of elbows.Therefore,according to the position and type of erosion defects,a three-dimensional geometric model of high-pressure elbow with erosion defects was established.The erosion characteristics were numerically simulated by using Fluent software.The erosion wear conditions of high-pressure elbows with and without defects were compared,and the influences of different defect factors on erosion characteristics were analyzed.The results show that,for high-pressure elbow without defects,serious erosion wear occurs at the outside of elbow,where the maximum erosion rate is much higher than that in the straight pipe sections of inlet and outlet;for high-pressure elbow with defects,serious erosion wear occurs at the defects.Moreover,the maximum erosion rate at elbows with defects is 6 times of that at elbows without defects.For elbows with defects,the maximum erosion rate increases with the increase of defect length and decreases with the increase of defect width.When defects are located at elbow axial angles of 0°,15°,and 30°,the maximum erosion rate is higher;when defects are located at 45°,60°and 75°,the maximum erosion rate is lower and stable.The study results provide references for safety warning of erosion wear of high-pressure elbows.
作者
张永学
何涛
樊建春
张来斌
张金亚
祁紫伟
Zhang Yongxue;He Tao;Fan Jianchun;Zhang Laibin;Zhang Jinya;Qi Ziwei(College of Mechanical and Transportation Engineering,China University of Petroleum(Beijing);College of Safety and Ocean Engineering,China University of Petroleum(Beijing))
出处
《石油机械》
北大核心
2022年第6期135-142,共8页
China Petroleum Machinery
基金
中国石油化工股份有限公司科技部委托项目“页岩气压裂装备在线监测与安全预警技术研究”(ZX20170331)。
