压力容器2023，Vol.40Issue(10)：47-57,11.DOI:10.3969/j.issn.1001-4837.2023.10.006
高压异径管应力-冲蚀耦合损伤特性及结构优化
Damage characteristics and structural optimization of high-pressure reducers under stress-erosion interaction
摘要
Abstract
Erosion damage is the main cause of pipeline failure.The damage evolution characteristics of high pressure reducer under stress-erosion coupling were studied by numerical simulation.The user-defined stress-erosion model was embedded into COMSOL Multiphysics,and the influences of parameters such as velocity,outlet pressure,mass flow rate,particle size and upstream length on the erosion damage evolution of internal high-pressure reducer were analyzed,the transition section of reducer was optimized and the optimal geometric configuration was proposed.The results show that under the stress-erosion coupling,the maximum erosion rate increases with the increase of the upstream length before the upstream length reaches the critical length,and the erosion hot spot will move downward continuously.Once the length of the upstream section reaches the critical value,the erosion morphology will tend to be stable.The increase of internal stress in the pipe will intensify the erosion of the pipe wall,the stress acceleration effect will be more obvious as the stress approaches the yield stress of the pipe,while the velocity,particle size and particle concentration are the main factors affecting the stress-erosion.In addition,the erosion ratio decreases with the decrease of the inclination angle θ of the transition section,the optimal value of the inclination angle of the transition section is different at different velocity.Considering the cost and the structure safety,it was proposed that θ = 10°～15° is the best configuration of the reducer.关键词
异径管/应力-冲蚀/CFD数值模拟/多物理场Key words
reducer/stress-erosion/CFD numerical simulation/multiphysics分类
机械制造引用本文复制引用
王华昆,王彤瑶,余杨..高压异径管应力-冲蚀耦合损伤特性及结构优化[J].压力容器,2023,40(10):47-57,11.基金项目
国家自然科学基金青年项目(52301339) （52301339）
福建省自然科学基金青年创新基金项目(2021J05004) （2021J05004）
