EFFECT OF INTERNAL GEOMETRY ON PERFORMANCE OF EFFERVESCENT ATOMIZER-A REVIEW
Keywords:
Liquid Atomization, Effervescent Atomizer, Spray cone angle, Sauter mean diameter (SMD), Aeration area, discharge orifice diameter, swirl generating vane angleAbstract
Effervescent atomizer is one of the most innovative atomizers and has been used in various applications
such as gas turbine combustors, consumer products, internal combustion (IC) engines and incinerators due to their
advantages such as good atomization and insensitive to liquid viscosity. Performance of an atomizer could be measured
by their resultant spray produced by the atomizer. The influence of the geometrical parameters and operating condition
towards the spray characteristics of any atomizer is very crucial since the change in the parameter will greatly affect the
performance. The factors influencing effervescent atomization are operating parameters and atomizer internal geometry.
The purpose of this article is to study the dependence of effervescent spray unsteadiness on Effervescent atomizer
internal design.The result shows that the size of the droplets produced decreases with a decrease in the air injection
area. This is due to the increase in atomizing air injection velocity that accompanies the decrease in the air injection
area, which improves atomization. Short mixing chamber length provides slightly larger SMD and gives wider spray
cone half-angle. The spray angle shows increment with the increase of discharge orifice diameter and with the increase
of the swirl generating vane angle.It is concluded that Effervescent atomizer is capable of providing a wide range of
spray patterns depending upon the application requirement by controlling various geometrical parameters.
