摘要
根据相关实验数据,应用商用CFD软件Fluent对Stansted均质阀、射流均质阀、倒Z环均质阀内部流场的压力和速度等参数进行数值模拟研究.结果表明:任何一种均质阀流场内,压力骤减均发生在流道最窄处的始端附近,在流道最窄段均质压力沿流道释放;压力梯度不能唯一决定均质破碎效果;在流道最窄段的始端位置,速度变化与压力骤变明显对应,在其它位置,速度变化主要与流道结构以及固壁影响有关;复杂的固壁边界,引起流动的剧烈变化,增强剪切、撞击等作用,有利于均质作用的微细化效果.
The numerical simulations on velocity and pressure parameters of the flow field in ＂Stansted＂ homogenizing valve,jet homogenizing valve and reversed ＂Z＂ annular homogenizing valve were generated.The results indicate that pressure fell rapidly when the fluid accelerats into the narrowest channel of the three types of homogenizing valves.And homogenizing pressure relieves from the initial position to the end of the narrowest channel.The homogenizing effects can＇t be uniquely determined by pressure gradient.Velocity changes were consistent with pressure drop nearby the initial position of the narrowest channel.Besides the initial position of the narrowest channel,velocity changes were mainly affected by homogenizing valve structure.Complicated solid wall boundary can make flow more violently,be conducive for shearing and impacting and advantage to homogenization＇s micronization.
出处
《工程设计学报》
CSCD
北大核心
2011年第3期191-196,共6页
Chinese Journal of Engineering Design
基金
北京市属高等学校人才强教计划资助项目(PHR20110887
PHR201106110)
关键词
均质阀
射流
倒Z环
流场
数值模拟
homogenizing valve
jet
reversed ＂Z＂ annular
flow field
numerical simulation
