摘要
基于CFD-DEM方法和Oka磨损模型,通过充分考虑颗粒间及颗粒与壁面间相互作用建立数学计算模型,分析研究不同喷嘴结构、硬度以及射流工艺参数对喷嘴磨损以及分布规律的影响。研究表明:随着喷嘴收缩角增加,喷嘴内表面所受总力增加,喷嘴磨损加剧,其磨损主要分布在过渡区和出口处;提高喷嘴硬度可以降低喷嘴磨损;改变喷嘴的长径比、系统工作压力及抛光液黏度会影响喷嘴磨损程度,而对磨损分布区域基本没影响。综合考虑各因素对喷嘴磨损的影响,当长径比为4,收缩角在10°~20°范围内,喷嘴材料剪切模量不低于48 GPa时最佳,且适当增加抛光液黏度可缓解喷嘴磨损。
Based on the CFD-DEM method and Oka wear model,a mathematical calculation model is established by fully considering the interaction between particles and particles and wall,and the analysis of the effects of different nozzle structure,hardness,and jet process parameters on nozzle wear and distribution.The study shows that with the shrinkage angle increases,the total force and wear on nozzle inner surface are increased,and the nozzle wear is mainly distributed in the nozzle transition area and outlet of the nozzle.Changing the nozzle aspect ratio,hardness,system working pressure and polishing fluid viscosity affect the nozzle wear without affecting the wear distribution area.Considering the influence of various factors on the nozzle wear,when the aspect ratio is 4 and the shrinkage angle is in the range of 10°~20°,the shear modulus of the nozzle material is not lower than 48 GPa,and the appropriate increase in the viscosity of the polishing fluid can reduce the nozzle wear.
作者
林琳
张云朋
蒋东岑
赵志磊
尤晖
LIN Lin;ZHANG Yun-peng;JIANG Dong-cen;ZHAO Zhi-leil;YOU Hui(School of Mechanical Engineering,Guangxi University,Nanning,Guangxi 530004;Guangxi Key Lab of Manufacturing System and Advanced Manufacturing Technology,Nanning,Guangxi 530004)
出处
《液压与气动》
北大核心
2023年第7期113-123,共11页
Chinese Hydraulics & Pneumatics
基金
广西制造系统与先进制造技术重点实验室主任课题(15-140-305005)
广西八桂学者专项经费(2019A02)
广西高校中青年教师科研基础能力提升项目(2019KY0020)。
