摘要
以清水和空气为实验介质,对同轴双通道气流式喷嘴雾化特性进行了实验研究,分析了喷淋量对雾化角及径向流通量分布的影响,分别考察了气速和喷嘴轴向位置对液滴索特平均直径(SMD)的影响。研究结果表明,喷嘴径向流通量分布随着雾化气量的升高而趋于集中,当气体流量高于1500 L/min时,雾化角随着气量升高而降低;喷口处气速与喷嘴轴向位置均是影响液滴SMD与粒径分布的重要因素,液滴SMD随着气速增大逐渐减小,当气速超过150 m/s时其下降趋势变缓,粒径分布均匀度显著提高;随着喷嘴轴向距离增大液滴SMD逐渐减小,当距离大于300 mm时其变化不再显著,但粒径分布均匀度显著提高。
The atomization performance of the coaxial dual channel pneumatic nozzle using water and air as experimental medium was investigated. The influence of different sprinkling rate on atomization angle and the radial flow distribution was analyzed. Respectively investigated the influence of gas velocity and the axial position of the spray on the Sauter mean diameter（SMD） of spray droplet. The results show that the radial flow distribution tended to concentrate with the increasing sprinkling rate and the atomization angle was reduced with the increasing gas flow rate when the rate was higher than 1500 L/min. Gas speed and axial position were the important factors influencing the droplet SMD and particle size distribution. SMD decreased by increasing either gas velocity or the axial position of nozzle. When gas velocity was more than 150 m/s and axial position was greater than 300 mm, the trend get gently but the uniformity of particle size distribution was increased significantly.
出处
《化工装备技术》
CAS
2015年第2期6-9,共4页
Chemical Equipment Technology
关键词
喷嘴
气流式雾化
平均直径
轴向位置
粒径分布
Nozzle
Pneumatic atomization
Mean diameter
Axial position
Particle size distribution
