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充填料浆中粗颗粒对弯管冲蚀磨损机理的研究

Study on the mechanism of erosion and wear of elbow pipes by coarse particles in filling slurry.

作者信息

Ai Chunming, Wang Zhe, Liu Chao, Wu Aixiang

机构信息

School of Safety Science and Engineering, Liaoning Engineering University, Huludao, 125000, Liaoning, People's Republic of China.

Key Laboratory of Mine Thermal Power Disasters and Prevention and Control of Ministry of Education, Huludao, 125000, Liaoning, People's Republic of China.

出版信息

Sci Rep. 2024 Dec 28;14(1):30888. doi: 10.1038/s41598-024-81849-2.

DOI:10.1038/s41598-024-81849-2
PMID:39730648
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11681024/
Abstract

Coarse particles in filling slurry are the primary factor causing wear in filling elbow pipes, and the wear mechanism of these particles on the pipes is influenced by various factors. To study the erosion and wear mechanism of elbow pipes caused by coarse particles, the motion state of coarse particles under different curvature radii, coarse particle gradations, and pipe diameters was investigated using a simulation method based on the coupling of Fluent and EDEM software, grounded in theories of fluid mechanics, rheology, and solid-liquid two-phase flow. The study explored the impact patterns and locations of wear induced by coarse particles on filling elbow pipes. The analysis results indicate that increasing the curvature radius leads to more punctate wear at the elbow and upstream wear. Increasing the proportion of finer particles in the coarse particle gradation forms a better cushioning layer and reduces erosion wear. Enlarging the pipe diameter shifts the high-low concentration boundary of coarse particles towards the elbow outlet and reduces erosion wear. The research findings provide significant references for optimizing coarse particle gradation and preventing pipe wear.

摘要

充填料浆中的粗颗粒是导致充填弯管磨损的主要因素，这些颗粒对管道的磨损机制受多种因素影响。为研究粗颗粒引起的弯管冲蚀磨损机制，基于流体力学、流变学和固液两相流理论，采用Fluent和EDEM软件耦合的模拟方法，研究了不同曲率半径、粗颗粒级配和管径条件下粗颗粒的运动状态。该研究探讨了粗颗粒对充填弯管的磨损影响模式及磨损位置。分析结果表明，增大曲率半径会导致弯头处出现更多点状磨损和上游磨损。在粗颗粒级配中增加细颗粒比例可形成更好的缓冲层并减少冲蚀磨损。增大管径会使粗颗粒的高低浓度边界向弯头出口移动并减少冲蚀磨损。研究结果为优化粗颗粒级配和防止管道磨损提供了重要参考。

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