摘要
为了更加准确地模拟磨料水射流在破岩时的内部混合及流动特性,基于CFD-DEM耦合的欧拉拉格朗日算法,运用计算流体力学软件Fluent与颗粒流软件EDEM进行联合仿真计算。结果表明:射流出口处的磨料颗粒平均速度小于同位置的水相速度,大部分磨料颗粒受水射流的冲击作用后,与内壁及其他颗粒发生碰撞,导致能量损失较大,轨迹线呈现多处弯折;只有少数颗粒与水射流发生冲击碰撞后,同水射流速度方向保持一致,以接近水相的速度射出。采用欧拉多相流模型算法开展了对比试验,验证了CFD-DEM耦合算法可更准确地模拟后混合磨料水射流的混合及流动情况,可为后续研究并改进后混合磨料水射流技术提供一种更优的数值计算方法。
In order to more accurately simulate the internal mixing and flow characteristics of abrasive water jet during rock breaking,based on CFD-DEM coupled Euler-Lagrangian algorithm,computational fluid dynamics software Fluent and particle flow software EDEM were used to carry out co-simulation calculation.The results show that the average velocity of the abrasive particles at the jet outlet is lower than the velocity of the water phase at the same position,and most of the abrasive particles collide with the inner wall and other particles after being impacted by the water jet,resulting in a large energy loss and multiple trajectories showing multiple bends.Only a few particles maintain the same velocity direction and shoot out at a speed close to the water phase as the water jet after colliding with the water jet.A comparative experiment was carried out with Euler multiphase flow model algorithm,which verified that the CFD-DEM coupling algorithm can more accurately simulate the mixing and flow of post-mixed abrasive water jet,and can provide a better numerical calculation method for subsequent research and improvement of post-mixed abrasive water jet technology.
作者
唐勇
吴伟
樊帆
王伟
谭沁源
TANG Yong;WU Wei;FAN Fan;WANG Wei;TAN Qinyuan(Changsha Institute of Mining Research Co.,Ltd.,Changsha,Hunan 410012,China;National Engineering Research Center for Metal Mining,Changsha,Hunan 410012,China;Changsha Research Institute of Mining and Metallurgy Co.,Ltd.,Changsha,Hunan 410012,China)
出处
《矿业研究与开发》
CAS
北大核心
2023年第6期163-168,共6页
Mining Research and Development
基金
国家重点研发计划项目(2020YFB1506003)
湖南省科技成果转化及产业化计划项目(2020GK2087).
