基于DDPM-RSM的浆体管道冲蚀磨损数值模拟研究  

Numerical Simulation of Erosion Wear in Slurry Pipeline Based on DDPM-RSM

作　　者：肖琦琨 马军[1,2] 郭凯 熊新[1,2] 袁浩然[1,2] XIAO Qikun;MA Jun;GUO Kai;XIONG Xin;YUAN Haoran(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,China;Yunnan Key Laboratory of Intelligent Control and Application,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500 [2]昆明理工大学云南省智能控制与应用重点实验室,昆明650500

出　　处：《中国腐蚀与防护学报》2025年第3期709-719,共11页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(62173168);云南省基础研究计划项目(202101BE070001-055)。

摘　　要：为揭示浆体输送过程中铁精矿对管道的冲蚀磨损机理,提出了一种基于稠密离散相模型(DDPM)与响应曲面法(RSM)的浆体管道冲蚀磨损特性分析的方法,模拟浆体输送过程中铁精矿对管道造成冲蚀磨损行为,并分析单因素和多因素耦合对管道冲蚀磨损的影响。首先,结合铁精矿输送实际工况,建立计算流体力学模型;其次利用公开数据集验证E/CRC冲蚀模型的准确性,表明该模型可用于计算矿浆管道的冲蚀磨损;最后,探究入口流速、颗粒粒径、颗粒质量流率及矿浆流动方向对管道冲蚀磨损的影响,设计RSM试验分析不同因素影响重要程度。结果表明:冲蚀速率随入口流速增加而增大,在1.5~2.0 m/s范围内管道的冲蚀磨损最小;随着粒径增大,冲蚀速率呈现先减小后增大的趋势,粒径大小为100μm时,能有效降低管道冲蚀磨损;随着颗粒质量流率增加,最大冲蚀速率先增大,后减小,最后趋于稳定,存在临界质量流率,结合管道运输的经济性,颗粒质量流率应大于2.5 kg/s;3种流场因素对管道冲蚀磨损影响程度为入口流速>颗粒质量流率>颗粒粒径;多因素耦合下,入口流速与颗粒粒径对管道冲蚀磨损影响最大。可为管道冲蚀防护提供理论依据。In order to reveal the erosion wear mechanism of pipeline during conveying iron ore concentrate containing slurry,a method based on the so called“dense discrete phase model”(DDPM)and“response surface methodology”(RSM)is proposed to analyze the erosion wear characteristics of slurry pipeline,and simulate the erosion wear behavior of pipeline caused by iron ore concentrate during the slurry conveying process.Meanwhile,the influence of single factor and multi-factor coupling on the erosion wear of pipeline is also analyzed.Firstly,a computational fluid dynamics(CFD)model is established by combining the actual working conditions of iron ore concentrate transportation;secondly,the accuracy of the E/CRC(Erosion/Corrosion Research Center)erosion model is verified by using the open dataset,which shows that the model can be used to calculate the erosion wear of the slurry pipeline;finally,the effect of inlet velocity,particle size,particle mass flow rate and slurry flow direction on the erosion wear of the pipeline is investigated,and RSM tests are designed to analyze the importance of different factors.The results show that:the erosion rate increases with the increase of inlet velocity,namely,in the range of 1.5-2.0 m/s the pipeline erosion wear is the smallest;with the increase of particle size,the erosion rate shows the trend of decreasing and then increasing,for particle size of 100μm,hence,the pipeline erosion wear can be effectively reduced;with the increase of the particle mass flow rate,the maximum erosion rate increases first,then decreases,and finally tends to be stabilized;By taking the critical mass flow rate and the economics of pipeline transportation into account,the propriate particle mass flow rate should be selected above 2.5 kg/s.The influence of three flow field factors on pipeline erosion wear is inlet velocity>particle mass flow rate>particle size;under multi-factor coupling,the combined effect of inlet velocity and particle size has the greatest influence on pipeline erosion wear.The method

关 键 词：浆体输送 计算流体力学 冲蚀磨损 稠密离散相模型 响应曲面法 数值模拟 

分 类 号：TG174[金属学及工艺—金属表面处理]