摘要：基于流体力学理论,建立喷嘴物理计算模型;利用Fluent软件对喷嘴参数进行正交试验,得出合理的喷嘴结构参数,再对喷嘴雾化场进行分析。结果表明:在喷嘴口径为1 mm,旋流室半径对喷嘴出口速度影响最为显著;优化后喷嘴雾化场所形成的雾滴平均粒径比较细微,粒径主要分布在25~35μm之间;雾滴速度随着喷雾距离增大而迅速降低,并保持在10 m/s左右。

关键词：离心式喷嘴；雾滴粒径；参数优化；正交试验；雾化

Abstract：For the problem of the atomization effect of nozzle structural parameters, a numerical calculation model of centrifugal nozzle was established based on the fluid mechanics theory. The orthogonal test of the nozzle parameters were carried out by the Fluent. A more reasonable structure parameter was obtained and then the atomization field of the nozzle was studied. The results show that the swirling chamber radius is the most remarkable influence on the nozzle flow field with the nozzle of same exit radius. It has formed the smaller average diameter of droplets with the optimized nozzle. The diameter of particles are mainly distributed in between 25~35μm. The cloud droplet speed decreases rapidly with the axis direction, and then it keeps in around 10 m/s.

Keywords: centrifugal nozzle；droplet diameter；parameter optimization；orthogonal experiment；atomization