Abstract:

In order to further improve the effect of ultrasonic atomization technology，the influence law

of liquid surface tension on spray particle size and droplet number density was systematically studied by us⁃

ing the self-developed spray atomization effect test device. The results show that with the increase of the

mass fraction of the surfactant solution，the surface tension of the liquid decreases first and then tends to be

stable. Among them，the non-ionic surfactant 3 has the most significant effect on reducing the surface ten⁃

sion of the solution. With the increase of the mass fraction of surfactant 3 solution，the particle size of liquid

atomization decreases first. When the mass fraction of surfactant 3 increases to 0.015%，the atomization par⁃

ticle size show an upward trend. With the increase of the mass fraction of surfactant 3 solution，the droplet

number density increases first and then decreases. This study is of great significance to improve the effect of

ultrasonic atomization and enhance its application in the fields of dust control，fire protection and fire fight⁃

ing.

Key words:

surface tension, ultrasonic atomization, spray dust suppression, water mist fire extin?

guishing, atomization parameters