Size distribution modelling of secondary atomization in spray of plain-jet airblast atomizer with finite stochastic breakup model

An experimental investigation of secondary atomization of spray in plain-jet airblast atomizers with circular array of six liquid jets, is studied. Cross flow of air with controlled velocity and pressure is applied to transverse jets. The liquid jets (Re=12000) are injected into air flow (Weg of 1250-3000) analyzed experimentally for different injection diameters of 0.8-1.6 mm. Particle size distribution measurement is carried out by Malvern Mastersizer X in fully atomized region of the atomizer. The droplet size distribution in secondary or final atomization stage is also modelled by Finite stochastic Breakup model, which requires 4 parameters to be defined i.e. initial droplet diameter, maximum stable droplet size, minimum mass ratio and droplet breakup probability. The modeling approximation is in very good agreement with experimental result. This remarkable consistency between model and experiment is quite useful in terms of optimal atomization performance by considering the dynamics of liquid jet

کلیدواژه ها:

Atomizer ، Airblast ، FSBM ، Liquid jet ، Malvern