基于DPM模型的铅铋合金中颗粒物对管道冲蚀的数值模拟研究

Numerical Simulation of Pipeline Erosion of Particulate Matter in LBE Based on DPM Model

基于流体力学理论研究液态铅铋合金(LBE)流体中颗粒物对管道壁面的冲蚀作用,采用Fluent软件中的离散相模型(DPM)对管壁的冲蚀进行数值模拟研究。结果表明,弯管角度、颗粒粒径、颗粒物浓度、管道的管径以及流速等对管壁的冲蚀磨损产生明显影响,其中,流速影响较大,在高流速下的冲蚀严重;弯管角度的影响显著,对直管段的冲蚀较弱,对弯管角度在30°~90°之间的管道的冲蚀比较严重;颗粒粒径在1~9μm内的微颗粒对管道冲蚀影响较小,粒径增大到10~90μm时,冲蚀速率变化不明显,粒径增大到100~900μm时,大直径的颗粒对管道冲蚀严重。

In order to study the erosion of liquid lead-bismuth eutectic(LBE) alloy fluid with particles, the fluid erosion on the pipe wall was numerical simulated by the discrete phase model(DPM) of Fluent, based on the theory of fluid mechanics. The results show that the angle of the elbow, the particle size, the particle concentration, the pipe diameter and the velocity of the flow have a significant effect on the erosion wear of the pipe wall. At high flow rates, the erosion is serious, and the erosion on the straight pipe section is much weaker. The maximum erosion rate of the elbow is mainly distributed in the range of 30° to 90°. The erosion of micro particles in the r1 a0 nμgme toof 910μμmm,a tnhde 9 e r μosmi o ins rsatmea ills, nboutt mcuacnhn odti fbfee riegnnt ofrreodm. tWhahte onf thmei crpoa rptiacrltei c sliezs.e iWs ihne nt hteh e r apnargtei c loef size increases to the range of 100 μm to 900 μm, the erosion of large-diameter particles is severe.