河南理工大学学报（自然科学版）2025，Vol.44Issue(4)：94-103,10.DOI:10.16186/j.cnki.1673-9787.2024030064
磨料参数对低压磨料空气射流喷嘴磨损影响研究
Effect of abrasive parameters on nozzle wear in low-pressure abrasive air jet machining
摘要
Abstract
Objectives The rapid wear of low-pressure abrasive air jet nozzles,caused by the erosion of high-speed abrasive particles inside the nozzle,limits the efficiency of rock breaking.This study aims to analyze the influence of abrasive parameters on nozzle wear to provide guidance for reducing wear and improving rock-breaking efficiency.Methods A Laval nozzle was selected as the research object.Coupled numerical simulations were performed using FLUENT-EDEM and Relative Wear models.Key abrasive parameters—in-cluding mass flow rate,particle size,shape,and type—were varied in the simulations.Wear depth was used as the evaluation criterion to assess the effects of these factors on nozzle wear.Results Wear predomi-nantly occurs in the convergent section of the nozzle within 6 mm from the inlet,with the maximum wear concentrated between 2.62 mm and 3.28 mm from the inlet.Beyond this zone,the abrasive particles form a beam flow along the nozzle axis,causing no significant wear in the nozzle's downstream convergent and ex-pansion sections.The wear pattern is closely related to the abrasive collision velocity and frequency with the nozzle wall.Increased abrasive mass flow results in more frequent collisions and deeper wear.Larger particle sizes increase collision energy,thereby intensifying wear.Particles with lower sphericity and sharper edges cause greater wear.Among different abrasive materials,garnet causes the most severe wear due to its material properties such as density,shear modulus,and Poisson's ratio.Conclusions This study highlights the critical influence of abrasive collision dynamics and material properties on nozzle wear,offer-ing theoretical guidance for reducing wear.关键词
磨料空气射流/喷嘴磨损/拉瓦尔喷嘴/磨料参数Key words
abrasive air jet/nozzle wear/laval nozzle/abrasive parameters分类
矿业与冶金引用本文复制引用
张宏图,叶红燕,刘勇,魏建平,李志平..磨料参数对低压磨料空气射流喷嘴磨损影响研究[J].河南理工大学学报（自然科学版）,2025,44(4):94-103,10.基金项目
国家自然科学基金资助项目(52274192,52374193) （52274192,52374193）
河南省优秀青年科学基金资助项目(232300421062) （232300421062）
