摘要
为研究矸石−粉煤灰高浓度充填料浆在竖直弯管内固液两相流的流动状态及磨损特性,基于EDEM的CFD-DEM耦合方法,以水泥和水混合而成的料浆作为连续相,以矸石和粉煤灰作为离散相,通过引入Archard和Oka磨损模型,计算分析充填管道的磨损性能。研究表明:采用耦合方法能更精确地反映料浆的流态和轨迹,能更准确地反映颗粒与流体的相互作用;充填管道磨损的高危区主要分布在弯管区域;弯管的磨损率随着料浆的流速增加而提高;矸石颗粒粒径以及弯管曲率半径对磨损率的影响与矸石颗粒的受力状态有关。
The research aimed to investigate the flow state and wear characteristics of solid-liquid two-phase flow in vertical curved pipes filled with high concentration gangue-fly ash mixture.A CFD-DEM coupling method based on EDEM was adopted.Cement and water mixed slurry was used as the continuous phase,while gangue and fly ash were used as the discrete phase.The Archard and Oka wear models were introduced to calculate and analyze the wear performance of the filling pipe.The study showed that the coupled method could more accurately reflect the flow state and trajectory of the slurry,and more accurately reflect the interaction between particles and fluids.The high-risk areas for pipe wear were mainly distributed in the curved pipe area.The wear rate of the curved pipe increased with the increase in slurry velocity.The particle size of gangue and the radius of curvature of the curved pipe had an impact on the wear rate related to the force state of gangue particles.
作者
杨凯
黎梦圆
YANG Kai;LI Mengyuan(BGRIMM Technology Group,Beijing 102628,China;National Centre for International Research on Green Metal Mining,Beijing 102628,China)
出处
《煤矿安全》
CAS
北大核心
2023年第12期116-122,共7页
Safety in Coal Mines
基金
国家自然科学基金面上资助项目(52274122)
矿冶科技集团有限公司科研基金资助项目(JBSTZX-6,04-2306)。
