集输管线盲通管冲刷腐蚀数值模拟

Numerical Simulation of Erosion and Corrosion of Blind Pipes in Gathering and Transportation Pipelines

运用计算流体力学(CFD)方法,研究流体速率、颗粒粒径、流体黏度以及流体密度等参数对盲通处冲刷腐蚀速率的影响。使用DPM模型求解得出固体颗粒在盲通处的运动轨迹,分析颗粒运动对盲通处冲刷腐蚀速率的影响。探究盲通管减弱冲刷腐蚀的最优结构,通过对比得出盲通长度对冲刷腐蚀的影响。数值仿真结果表明,冲刷腐蚀严重区域主要布置在盲通管的内拱璧位置处;冲刷腐蚀随着流体速度的增加而加剧,随着颗粒粒径和黏度的增大而减弱,盲通堵头长度为45mm时冲刷腐蚀最弱。

The influence of parameters such as fluid velocity, particle size, fluid viscosity, and fluid density on the erosion behavior of blind passages was investigated using computational fluid dynamics (CFD). DPM model was used to calculate the trajectory of solid particles in blind pass, and the effect of particle movement on erosion corrosion rate in blind pass was analyzed. Explore the optimal structure of blind-pass pipe to reduce erosion corrosion, and compare the influence of blind-pass length on erosion corrosion.The numerical simulation results show that the serious erosion corrosion area is mainly located at the location of inner arch of the blind-through pipe. As the fluid velocity increases, the erosion corrosion behavior intensifies, and the erosion corrosion behavior weakens due to the increase in particle size and the viscosity, and the erosion corrosion behavior was the weakest when the blind pass length was 45 mm.