摘要
通过数值计算和实验测试手段研究了降尘用超声雾化喷嘴的内外流场。结果表明:通过超声雾化喷嘴内部流场的压力和速度矢量分布可以看出:射流喷嘴进口处和超声波振荡腔内部的压力分布较大。液体速度经过超声波振荡腔后速度减小,并且在喷嘴内部形成了漩涡。随着射流水压的增加,雾滴D50表现出明显减小趋势。随着以射流喷嘴口为起点距离超声波振荡腔的相对距离的增加,雾滴D50表现出先减小后增加,雾滴速度表现出先增大后缓慢减小,得到最佳的超声波振荡腔位置为3.5 cm。
The inside and outside flow fields of ultrasonic atomization nozzle for dust suppression were studied through numerical calculation and experimental test methods.Results show that the pressure distribution of jet nozzle inlet and ultrasonic oscillation cavity is larger according to the pressure and velocity vector distribution of the internal flow field of the nozzle.The liquid speed after ultrasonic oscillation cavity is reduced,and the vortex is formed within the nozzle.With the increasing of jet pressure,droplets D50 showed an obvious decreasing trend.With the increase of ralative distance from jet nozzle to ultrasonic oscillation cavity,droplets D50 decreased first and then increased,and droplets speed increased and then slowly decreased.The most optimal location for ultrasonic oscillation cavity is 3.5 cm.
作者
张建林
李洪喜
刘燕萍
ZHANG Jianlin;LI Hongxi;LIU Yanping(College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024, Chin)
出处
《煤矿安全》
北大核心
2017年第12期41-43,共3页
Safety in Coal Mines
基金
太原理工大学校基金资助项目(1205-04020202)
关键词
雾化降尘
超声喷嘴
喷雾压力
雾化粒度
参数优化
dust suppression by spraying
ultrasonic nozzle
spray pressure
atomized particle size
parameter optimization
