空气雾化喷嘴的液滴雾化性能实验研究

采用LSA-Ⅲ型激光粒度仪对一种常用的小流量空气雾化喷嘴的液滴雾化性能进行实验研究。实验主要测定了不同气液比、气相压力和液相压力情况下沿喷雾轴向不同位置处的液滴粒径分布。测定结果表明气液比和气相压力对雾化液滴粒径影响均较大，其中气相压力影响最大，气液比其次，液相压力影响最小。在本实验测定条件下，经过喷嘴雾化后在轴向100、200、300、400和500 mm位置处液滴的表面积平均直径（SMD）和体积平均直径（D43）出现波动性变化。通过对实验测得液滴粒径分布数据的分析，可以得到Rosin-Rammler分布函数中的特征参数和n，为定量计算液滴粒径提供理论基础。

Experimental Investigation on Particle Atomization Performance of Air Atomizing Nozzle

The particle size distribution of a common air atomizing nozzle with small flow was measured by LSA-Ⅲ laser particle sizer.The experiment was mainly focused on particle size distribution along the different axial position in the condition of different gas-liquid ratio,gas pressure and liquid pressure.The experimental results show that both gas-liquid ratio and gas pressure have influence on particle size,the effect of gas pressure is the biggest,then is the gas-liquid ratio and liquid pressure is smallest.According to this experimental condition,the surface area average diameter and volume average diameter of droplet changing at the axial distance of 100 mm,200 mm,300 mm,400 mm and 500 mm are undulatory.By data analysis of the experimental results of droplet size distribution,the characteristic parameters of and n in Rosin-Rammler distribution function could be obtained,and the theory foundation of quantitative calculation for droplet size was provided.