摘要
为了提高喷嘴雾化效率,基于维多辛斯曲线理论,对喷嘴出口结构进行优化,研制出了一种新型渐缩式空气雾化喷嘴。利用Fluent软件基于DPM方法和标准湍流模型,模拟仿真了喷嘴雾化的速度分布和粒径分布,并分析不同喷嘴气液夹角对雾化效果的影响。分析结果表明:雾化气体速度在轴线方向随距离增大而明显减小,在径向方向上呈标准正态分布;当气液夹角α=20°时,雾化气体速度最大,液滴索特尔平均直径(SMD)最小,雾化效果最好。
In order to improve the efficiency of nozzle atomization, Witozinsky curve was used to optimize the outlet structure of nozzle. And a new kind of tapered air-blast atomizer was developed. Study of atomizing velocity distribution and particle size distribution has been made as well as the analysis of the atomization effects of nozzles with different gas-liquid angle, using Flu- ent software based on DPM method and standard turbulence model （k-6）. The results show that the velocity of the atomized gas decreases distinctly along the axis direction, while it presents the standard normal distribution in the radial direction. The veloc- ity of the atomized gas reaches the maximum and the Sauter mean diameter （SMD） gets the smallest when the angle of the gas- liquid is 20°. At this point, the atomization effect is the best.
出处
《农业装备与车辆工程》
2016年第12期1-5,共5页
Agricultural Equipment & Vehicle Engineering
基金
国家科技支撑计划资助(2015BAK16B04)
关键词
喷嘴
气液夹角
雾化
模拟仿真
nozzle
gas-liquid angle
atomization
simulation
