The concept design and study of twin-fluid effervescent atomizer with air stone aerator

Abstract

The work presents effervescent atomizer with air stone aerator. The aerator used air stone AS30 by Tetratec. porous stone with fine pores gives small resistance and allow to use the full power of the aerator. Measurements of the pressure drop and droplets sizes and spray angle produced by an effervescent twin-fluid atomizer with air stone aerator were carried out using the microphotography method. The tests were conducted from 0.05 to 0.3 (m3/h) and for liquid of 10 to 50 (l/h). The results showed that the drop of pressure increases with the rise of the gas flow rate and liquid flow rate. The discharge coefficient depends on the relation of the mass gas flow rate and the mass liquid flow rate. The spray angle increased with an increase in gas Reynolds number and with a decrease in liquid Reynolds number. Dimensionless equations were proposed that described the discharge coefficient and the spray angle. The obtained data is very important for atomizers designing, especially including some of twin-fluid atomizers.