中国农村水利水电Issue(6)：109-114,6.DOI:10.12396/znsd.2500964
水下射流冲刷的CFD-DEM耦合模拟及射流参数优化研究
CFD-DEM Coupling and Single-Phase Decoupling Strategies for Underwater Jet Erosion Simulation and Jet Parameter Optimization
摘要
Abstract
Numerical simulation of underwater jet-induced scour faces significant computational efficiency challenges due to the strong coupling of water-sediment multiphase flow,transient hydrodynamic behavior,and the discrete nature of sediment particles.To address this issue,this study employs a coupled Computational Fluid Dynamics and Discrete Element Method(CFD-DEM)approach to simulate the jet scouring process on a non-cohesive uniform sand bed.The simulations reveal strong correlations between scour performance and key physical parameters,including average shear stress,maximum shear stress,average shear velocity,maximum shear velocity,and average total pressure.Based on this finding,an innovative simplified strategy is proposed,which decouples the complex two-phase flow problem into a computationally more efficient simulation involving only single-phase water jet flow.Utilizing this strategy,the effects of key jet parameters—nozzle diameter,shape,and spacing—on scour efficiency are systematically investigated.The results indicate that,under the optimal nozzle spacing,square nozzle configurations,coupled with either increased flow rate or reduced diameter,significantly enhance the key physical quantities acting on the bed,thereby leading to improved scour performance.The proposed decoupled simulation method offers an efficient alternative for tackling underwater jet scour problems and opens new avenues for theoretical research and practical applications in related fields.关键词
水下射流/冲刷效果/射流冲淤/数值模拟Key words
underwater jet/scouring effect/jet scouring and sedimentation/numerical simulation分类
建筑与水利引用本文复制引用
吴玉卫,段自豪,章佳晨..水下射流冲刷的CFD-DEM耦合模拟及射流参数优化研究[J].中国农村水利水电,2026,(6):109-114,6.基金项目
国家重点研发计划项目(2022YFE0113500) （2022YFE0113500）
中央级公益性科研院所基本科研业务费项目(TKS20240502). （TKS20240502）
