含有针阀的气泡雾化喷嘴结构与工艺参数仿真  

Simulation of structure and process parameters of effervescent atomizer with needle valve

作　　者：肖洒 邹光明[1,2] 侯宇 刘源泂[1,2] 许家旺 方陈[2] XIAO Sa;ZOU Guangming;HOU Yu;LIU Yuanjiong;XU Jiawang;FANG Chen(Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;Key Laboratory of Mechanical Transmission and Manufacturing Engineering of Hubei Province,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081 [2]武汉科技大学机械传动与制造工程湖北省重点实验室,湖北武汉430081

出　　处：《传感器与微系统》2023年第7期18-22,共5页Transducer and Microsystem Technologies

基　　金：湖北省技术创新专项重大项目(2018AAA027)。

摘　　要：为提高模具喷油润滑的效果,设计了一种带有针阀的气泡雾化喷嘴。通过Fluent对喷嘴进行仿真分析,研究了喷嘴收敛角、针阀开度和气液比(GLR)对喷嘴出口平均速度和截面含气率的影响。结果表明:针阀开度小于0.2 mm时,喷嘴出口平均速度随针阀开度增大而减小;针阀开度增大到0.2 mm后,出口平均速度不再受针阀开度影响,此时,出口平均速度随收敛角增大而减小;但当收敛角大于110°后,收敛角的变化对出口平均速度的影响可忽略;随着GLR增大,喷嘴出口平均速度近似呈线性增大;出口截面含气率只受GLR的影响,且随着GLR的增大而增大;但随着GLR的增大,GLR对截面含气率的影响逐渐减弱。仿真结果为气泡雾化喷嘴的设计提供理论指导。In order to improve lubrication effect of mold,an effervescent atomizer with a needle valve is designed.Simulation of nozzle is carried out by Fluent,and the effects of nozzle convergence angle,needle valve opening and gas-liquid ratio(GLR)on the average velocity and void fraction of nozzle outlet are studied.The results show that when the needle opening is less than 0.2 mm,the average velocity of the nozzle outlet is decreased with the increase of the needle valve opening.When the needle valve opening is increased to 0.2 mm,the average velocity of the outlet is no longer affected by the needle valve opening.In this case,the average velocity of the outlet is decreased with the increase of the convergence angle.However,when the convergence angle is greater than 110°,the influence of the change of the convergence angle on the average velocity of the outlet is negligible.With the increase of the GLR,the average velocity of the outlet is increased linearly.The void fraction of the outlet is only affected by the GLR,and the void fraction of the outlet is increased with the increase of the GLR.However,with the increase of the GLR,the influence of the GLR on the void fraction of the outlet is gradually weakened.The simulation results provides theoretical guidance for the design of effervescent atomizer.

关 键 词：气泡雾化喷嘴 针阀 仿真 截面含气率 平均速度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TK05[自动化与计算机技术—控制科学与工程]