The nucleator nozzle plays an important role in promoting the rapid nucleation

crystallization

and snow formation process of droplets of artificial snow. In order to study the gas-liquid two-phase flow process inside the nucleator nozzle and its influence on atomization behavior

a visual experimental platform was designed in the paper. The results show that there is two-phase annular flow inside the nucleator nozzle

and a continuous hollow cone spray field is formed external. As the gas-liquid pressure ratio (GLR) increases

interface disturbance waves gradually disappear at the gas-liquid interface of the internal flow. As the air core occupies more space

the liquid film thickness gradually decreases and becomes uniform and stable

and the atomization efficiency and quality are significantly improved. When the GLR increased from 20% to 67%

the uniformity and stability of droplet distribution increased by 17% and 60%

respectively. This work can provide important guidance for the structural design of high-performance atomization components.