流体机械2026，Vol.54Issue(3)：31-38,109,9.DOI:10.3969/j.issn.1005-0329.2026.03.004
管内异物动态流动路径数值计算方法及试验验证
Numerical calculation method and experimental verification for dynamic flow path of foreign objects in pipelines
摘要
Abstract
Quantitatively predicting the motion trajectory and force characteristics of complexly shaped foreign objects(FOs)in confined turbulent flows is key to assess the safety risks of industrial pipeline systems.In response to the limitations of existing CFD software,particularly inefficient mesh reconstruction for complex moving boundaries and difficulties in accurately resolving transient collision processes,this study proposed an innovative coupled numerical method that integrated the immersed boundary method(IBM)and the discrete element method(DEM).A fluid flow model for a variable-diameter pipeline containing spherical FOs was developed,achieving bidirectional,multi-physics coupling(among the fluid,the FOs and the pipe wall)by combining an adaptive SST k-ω turbulence model with DEM contact theory.A hydrodynamic experimental test rig was constructed to measure the suspended height of spherical FOs in the variable-diameter pipe.This revealed an average error of less than 10%between the experimental and numerical results,thereby validating the numerical model's reliability.Furthermore,the dynamic flow behavior of a block-shaped FOs in the same variable-diameter pipe was investigated,revealing significant differences in trajectory and flow field characteristics compared to spherical FOs.These results lay the computational path for understanding FOs induced motion mechanisms and developing future risk assessment methods.关键词
管道/异物/流动路径/浸没边界法/离散元法Key words
pipeline/foreign object/flow path/immersed boundary method/discrete element method分类
机械制造引用本文复制引用
王浩然,徐子航,许晓飞,王泽武..管内异物动态流动路径数值计算方法及试验验证[J].流体机械,2026,54(3):31-38,109,9.基金项目
国家重点研发计划课题(2018YFA0704604) （2018YFA0704604）
