具有花瓣形结构的弯管抗冲蚀特性研究  

Study on Erosion Resistance of Petal-shaped Elbow Pipe

作　　者：郭姿含 张军[1,2] 黄金满 GUO Zihan;ZHANG Jun;HUANG Jinman(School of Marine Equipment and Mechanical Engineering,Jimei University,Xiamen 361021,Fujian,China;Fujian Province Key Laboratory of Energy Cleaning Utilization and Development,Jimei University,Xiamen 361021,Fujian,China;Xiamen Anmaixin Automation Technology Co.,Ltd.,Xiamen 361021,Fujian,China)

机构地区：[1]集美大学海洋装备与机械工程学院,福建厦门361021 [2]集美大学福建省能源清洁利用与开发重点实验室,福建厦门361021 [3]厦门安麦信自动化科技有限公司,福建厦门361021

出　　处：《机械科学与技术》2024年第6期975-983,共9页Mechanical Science and Technology for Aerospace Engineering

基　　金：福建省自然科学基金项目(2022J01334)。

摘　　要：冲蚀破坏是气固两相流弯管中的常见问题,其直接关系到管路系统的正常运行及管道寿命。针对此问题,提出一种内壁具有花瓣形的弯管结构,以提高弯管的抗冲蚀特性。采用CFD-DPM方法对该弯管结构气固流动特性进行了分析。分析结果表明:不同位置花瓣形结构具有与普通弯管相同的“V”形冲蚀分布;当位于颗粒壁面第一次碰撞之前,可以改变颗粒轨迹并在背部形成循环区,一定程度上抑制冲蚀;花瓣形结构最佳抗冲蚀位置为θ=20°且该位置不随流速和颗粒质量流量的变化而变化,相比于不具有花瓣结构的普通弯管,抗冲蚀性能提高17.27%。这种结构可提高弯管的抗冲蚀性能,延长管道寿命。The erosion damage is a frequent failure for the elbow in gas-solid two-phase system,which is directly related to the reliability and working life of the pipeline system.A petal shaped elbow structure to improve the anti-erosion performance of the elbow is proposed.The gas-solid flow characteristics of the elbow structure were analyzed by using CFD-DPM method.The results show that the petal-shaped structure at different positions has the same V-shaped erosion distribution as the conventional elbow.Before the first impact on the particle wall,the particle track can be changed and a circulation zone can be formed on the back of the particle,which can inhibit the erosion to a certain extent.The best anti-erosion position of petal-shaped structure isθ=20°and this position does not change with the change of flow rate and particle mass flow rate.Comparing with the conventional elbow without petal-shaped structure,the anti-erosion performance is improved by 17.27%.This structure can improve the erosion resistance of the elbow and extend the life of the pipe.

关 键 词：冲蚀 DPM 气固两相流 结构优化 花瓣形 弯管 

分 类 号：TH117.1[机械工程—机械设计及理论]